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1
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0000920872
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Carbohydrate modulated gene expression in plants
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Koch KE Carbohydrate modulated gene expression in plants. Annu Rev Plant Physiol Plant Mol Biol. 47:1996;509-540.
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(1996)
Annu Rev Plant Physiol Plant Mol Biol
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, pp. 509-540
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Koch, K.E.1
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3
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0031403530
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Sugar sensing and sugar-mediated signal transduction in plants
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Smeekens S, Rook F Sugar sensing and sugar-mediated signal transduction in plants. Plant Physiol. 115:1997;7-13.
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(1997)
Plant Physiol
, vol.115
, pp. 7-13
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Smeekens, S.1
Rook, F.2
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4
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0033608996
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Commentary: Another player joins the complex field of sugar-regulated gene expression in plants
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An open-minded review suggesting multiple sugar sensing and signaling mechanisms and pathways in plants. It remains unclear whether AMP/ATP ratio can control SnRK and is important for sugar signaling in plants.
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Gibson SI, Graham IA Commentary: another player joins the complex field of sugar-regulated gene expression in plants. Proc Natl Acad Sci USA. 96:1999;4746-4748. An open-minded review suggesting multiple sugar sensing and signaling mechanisms and pathways in plants. It remains unclear whether AMP/ATP ratio can control SnRK and is important for sugar signaling in plants.
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(1999)
Proc Natl Acad Sci USA
, vol.96
, pp. 4746-4748
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Gibson, S.I.1
Graham, I.A.2
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5
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0032720694
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The dual function of sugar carriers: Transport and sugar sensing
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A comprehensive review on monosaccharide and sucrose transporters. An interesting model of sugar sensing in plants is presented, including the potential roles of sugar transporters as sensors.
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Lalond S, Boles E, Hellmann H, Barker L, Patrick JW, Frommer WB, Ward JM The dual function of sugar carriers: transport and sugar sensing. Plant Cell. 11:1999;707-726. A comprehensive review on monosaccharide and sucrose transporters. An interesting model of sugar sensing in plants is presented, including the potential roles of sugar transporters as sensors.
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(1999)
Plant Cell
, vol.11
, pp. 707-726
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Lalond, S.1
Boles, E.2
Hellmann, H.3
Barker, L.4
Patrick, J.W.5
Frommer, W.B.6
Ward, J.M.7
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6
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0033153127
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Source-sink regulation by sugar and stress
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Elaboration on plant sugar sensing and signaling with a unique focus on the role of invertase as a key enzyme in source-sink regulation and in the cross-talk between sugar and stress signaling.
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Roitsch T Source-sink regulation by sugar and stress. Curr Opin Plant Biol. 2:1999;198-206. Elaboration on plant sugar sensing and signaling with a unique focus on the role of invertase as a key enzyme in source-sink regulation and in the cross-talk between sugar and stress signaling.
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(1999)
Curr Opin Plant Biol
, vol.2
, pp. 198-206
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Roitsch, T.1
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8
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0032941868
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Feasting, fasting and fermenting
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Johnston M Feasting, fasting and fermenting. Trends Genet. 15:1999;29-33.
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(1999)
Trends Genet
, vol.15
, pp. 29-33
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Johnston, M.1
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9
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0031717105
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The AMP-activated/SNF1 protein kinase subfamily: Metabolic sensors of the eukaryotic cells
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Hardie DG, Carling D, Carlson M The AMP-activated/SNF1 protein kinase subfamily: metabolic sensors of the eukaryotic cells. Ann Rev Biochem. 67:1998;821-855.
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(1998)
Ann Rev Biochem
, vol.67
, pp. 821-855
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Hardie, D.G.1
Carling, D.2
Carlson, M.3
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10
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0033577973
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Insulin secretion: Feed-forward control of insulin biosynthesis?
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Rutter GA Insulin secretion: feed-forward control of insulin biosynthesis? Curr Biol. 9:1999;R443-445.
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(1999)
Curr Biol
, vol.9
, pp. 443-445
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Rutter, G.A.1
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11
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0031410278
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The five classical plant hormones
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Kende H, Zeevaart AD The five classical plant hormones. Plant Cell. 9:1997;1197-1210.
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(1997)
Plant Cell
, vol.9
, pp. 1197-1210
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Kende, H.1
Zeevaart, A.D.2
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12
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0031605893
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Plant hormones
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Leyser HMO Plant hormones. Curr Biol. 8:1998;5-7.
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(1998)
Curr Biol
, vol.8
, pp. 5-7
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Leyser, H.M.O.1
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13
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0029972916
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Activation of Gal4p by galactose-dependent interaction of galactokinase and Gal80p
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Zenke FT, Engels R, Vollenbroich V, Meyer J, Hollenberg CP, Breunig KD Activation of Gal4p by galactose-dependent interaction of galactokinase and Gal80p. Science. 272:1996;1662-1665.
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(1996)
Science
, vol.272
, pp. 1662-1665
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Zenke, F.T.1
Engels, R.2
Vollenbroich, V.3
Meyer, J.4
Hollenberg, C.P.5
Breunig, K.D.6
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14
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0031042946
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Galactose-dependent reversible interaction of Gal3p with Gal80p in the induction pathway of Gal4p-activated genes of Saccharomyces cerevisiae
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Yano K-I, Fukasawa T Galactose-dependent reversible interaction of Gal3p with Gal80p in the induction pathway of Gal4p-activated genes of Saccharomyces cerevisiae. Proc Natl Acad Sci USA. 4:1997;1721-1726.
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(1997)
Proc Natl Acad Sci USA
, vol.4
, pp. 1721-1726
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Yano, K.-I.1
Fukasawa, T.2
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15
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0028152032
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Carbon catabolite repression regulates glyoxylate cycle gene expression in cucumber
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Graham IA, Denby KJ, Leaver CJ Carbon catabolite repression regulates glyoxylate cycle gene expression in cucumber. Plant Cell. 6:1994;761-772.
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(1994)
Plant Cell
, vol.6
, pp. 761-772
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Graham, I.A.1
Denby, K.J.2
Leaver, C.J.3
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17
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0031420435
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Glucose and stress independently regulate source and sink metabolism and defense mechanisms via signal transduction pathways involving protein phosphorylation
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Ehness R, Ecker M, Godt DE, Roitsch T Glucose and stress independently regulate source and sink metabolism and defense mechanisms via signal transduction pathways involving protein phosphorylation. Plant Cell. 9:1997;1825-1841.
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(1997)
Plant Cell
, vol.9
, pp. 1825-1841
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Ehness, R.1
Ecker, M.2
Godt, D.E.3
Roitsch, T.4
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18
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0032080298
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Glucose sensing and signaling by two glucose receptors in the yeast Saccharomyces cerevisiae
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This report provided conclusive results that the two glucose transporter-like proteins SNF3 and RGT2 are high and low affinity glucose sensors, respectively, in controlling the expression of glucose-dependent transcription of glucose transporter genes in yeast. This is the best demonstration that glucose sensing and signaling can be a receptor-mediated process which is independent of glucose metabolism.
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Ozcan S, Dover J, Johnston M Glucose sensing and signaling by two glucose receptors in the yeast Saccharomyces cerevisiae. EMBO J. 17:1998;2566-2573. This report provided conclusive results that the two glucose transporter-like proteins SNF3 and RGT2 are high and low affinity glucose sensors, respectively, in controlling the expression of glucose-dependent transcription of glucose transporter genes in yeast. This is the best demonstration that glucose sensing and signaling can be a receptor-mediated process which is independent of glucose metabolism.
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(1998)
EMBO J
, vol.17
, pp. 2566-2573
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Ozcan, S.1
Dover, J.2
Johnston, M.3
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19
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0031968922
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Sugar sensing and α-amylase gene repression in rice embryos
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Umemura TA, Perata P, Futsuhara Y, Yamaguchi J Sugar sensing and α-amylase gene repression in rice embryos. Planta. 204:1998;420-428.
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(1998)
Planta
, vol.204
, pp. 420-428
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Umemura, T.A.1
Perata, P.2
Futsuhara, Y.3
Yamaguchi, J.4
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20
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0031897460
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Carbon source-dependent phosphorylation of hexokinase PII and its role in the glucose-signaling response in yeast
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Randez-Gil F, Sanz P, Entain K-D, Prieto JA Carbon source-dependent phosphorylation of hexokinase PII and its role in the glucose-signaling response in yeast. Mol Cell Biol. 18:1998;2940-2948.
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(1998)
Mol Cell Biol
, vol.18
, pp. 2940-2948
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Randez-Gil, F.1
Sanz, P.2
Entain, K.-D.3
Prieto, J.A.4
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21
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0032985365
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Novel alleles of yeast hexokinase PII with distinct effects on catalytic activity and catabolite repression of SUC2
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The authors isolated and characterized novel HXK2 mutants and challenged the presently accepted view that the role of sugar kinases in the glucose repression is directly related to their catalytic activity.
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Hohmann S, Winderickx J, Winde JHd, Valckx D, Cobbaert P, Luyten K, Meirsman CD, Ramos J, Thevelein JM Novel alleles of yeast hexokinase PII with distinct effects on catalytic activity and catabolite repression of SUC2. Microbiology. 145:1999;703-714. The authors isolated and characterized novel HXK2 mutants and challenged the presently accepted view that the role of sugar kinases in the glucose repression is directly related to their catalytic activity.
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(1999)
Microbiology
, vol.145
, pp. 703-714
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Hohmann, S.1
Winderickx, J.2
Winde, J.3
Valckx, D.4
Cobbaert, P.5
Luyten, K.6
Meirsman, C.D.7
Ramos, J.8
Thevelein, J.M.9
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22
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0033102055
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Mannose inhibits Arabidopsis germination via a hexokinase-mediated step
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Pego JV, Weisbeek PJ, Smeekens SCM Mannose inhibits Arabidopsis germination via a hexokinase-mediated step. Plant Physiol. 119:1999;1017-1023.
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(1999)
Plant Physiol
, vol.119
, pp. 1017-1023
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Pego, J.V.1
Weisbeek, P.J.2
Smeekens, S.C.M.3
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23
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0032191374
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Pleiotropic control of glucose and hormone responses by PRL1, a nuclear WD protein, in Arabidopsis
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Incredible amounts of data were presented for the cloning and characterization of this pleiotropic Arabidopsis mutant prl1. The fact that PRL1 is a WD-domain signaling protein, which can potentially interact with multiple partners, might explain the sugar hypersensitivity, sugar insensitivity, and sugar independent phenotypes.
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Nemeth K, Salchert K, Putnoky P, Bhalerao R, Koncz-Kalman Z, Stankovic-Stangeland B, Laszlo-Bako, Mathur J, Okresz L, Stabel Set al. Pleiotropic control of glucose and hormone responses by PRL1, a nuclear WD protein, in Arabidopsis. Genes Dev. 12:1998;3059-3073. Incredible amounts of data were presented for the cloning and characterization of this pleiotropic Arabidopsis mutant prl1. The fact that PRL1 is a WD-domain signaling protein, which can potentially interact with multiple partners, might explain the sugar hypersensitivity, sugar insensitivity, and sugar independent phenotypes.
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(1998)
Genes Dev
, vol.12
, pp. 3059-3073
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Nemeth, K.1
Salchert, K.2
Putnoky, P.3
Bhalerao, R.4
Koncz-Kalman, Z.5
Stankovic-Stangeland, B.6
Laszlo-Bako7
Mathur, J.8
Okresz, L.9
Stabel, S.10
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24
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0033609163
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Regulatory interaction of PRL1 WD protein with Arabidopsis SNF1-like protein kinases
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This study provided the first evidence that PRL1 might be a negative regulator of the plant SnRK, AKIN10 and AKIN11 in Arabidopsis. It would be interesting to determine the glucose activation of sucrose synthase gene expression in the prl1 mutant or the AKIN knockouts because the potato SnRK antisense plants only show defects in sucrose synthase gene expression.
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Bhalerao RP, Salchert K, Bakó L, Ökrész L, Szabados L, Muranaka T, Machida Y, Schell J, Koncz C Regulatory interaction of PRL1 WD protein with Arabidopsis SNF1-like protein kinases. Proc Natl Acad Sci USA. 96:1999;5322-5327. This study provided the first evidence that PRL1 might be a negative regulator of the plant SnRK, AKIN10 and AKIN11 in Arabidopsis. It would be interesting to determine the glucose activation of sucrose synthase gene expression in the prl1 mutant or the AKIN knockouts because the potato SnRK antisense plants only show defects in sucrose synthase gene expression.
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(1999)
Proc Natl Acad Sci USA
, vol.96
, pp. 5322-5327
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Bhalerao, R.P.1
Salchert, K.2
Bakó, L.3
Ökrész, L.4
Szabados, L.5
Muranaka, T.6
MacHida, Y.7
Schell, J.8
Koncz, C.9
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25
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0029187864
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Sugar-induced increase of calcium-dependent protein kinases associated with the plasma membrane in leaf tissues of tobacco
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Ohto MA, Nakamura K Sugar-induced increase of calcium-dependent protein kinases associated with the plasma membrane in leaf tissues of tobacco. Plant Physiol. 109:1995;973-981.
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(1995)
Plant Physiol
, vol.109
, pp. 973-981
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Ohto, M.A.1
Nakamura, K.2
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26
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0028047087
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Inhibitors of protein phosphatases 1 and 2A block the sugar-inducible gene expression in plants
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Takeda S, Mano S, Ohto M, Nakamura N Inhibitors of protein phosphatases 1 and 2A block the sugar-inducible gene expression in plants. Plant Physiol. 106:1994;567-574.
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(1994)
Plant Physiol
, vol.106
, pp. 567-574
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Takeda, S.1
Mano, S.2
Ohto, M.3
Nakamura, N.4
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28
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0028274294
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Characterization of tobacco protein kinase NPK5, a homolog of Saccharomyces cerevisiae SNF1 that constitutively actives expression of the glucose-repressible SUC2 gene for a secreted invertase of S. cerevisia
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Muranaka T, Banno H, Machida Y Characterization of tobacco protein kinase NPK5, a homolog of Saccharomyces cerevisiae SNF1 that constitutively actives expression of the glucose-repressible SUC2 gene for a secreted invertase of S. cerevisia. Mol Cell Biol. 14:1994;2958-2965.
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(1994)
Mol Cell Biol
, vol.14
, pp. 2958-2965
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Muranaka, T.1
Banno, H.2
MacHida, Y.3
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29
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0031861675
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Antisense expression of a sucrose non-fermenting-1-related protein kinase sequence in potato results in decreased expression of sucrose synthase in tubers and loss of sucrose-inducibility of sucrose synthase transcripts in leaves
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This paper presented the first study of the antisense-SnRK transgenic potato plants. If plant SnRK is a global regulator of carbon metabolism in plants, we might expect more interesting and severe phenotypes to be revealed in the future.
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Purcell PC, Smith AM, Halford NG Antisense expression of a sucrose non-fermenting-1-related protein kinase sequence in potato results in decreased expression of sucrose synthase in tubers and loss of sucrose-inducibility of sucrose synthase transcripts in leaves. Plant J. 14:1998;195-202. This paper presented the first study of the antisense-SnRK transgenic potato plants. If plant SnRK is a global regulator of carbon metabolism in plants, we might expect more interesting and severe phenotypes to be revealed in the future.
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(1998)
Plant J
, vol.14
, pp. 195-202
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Purcell, P.C.1
Smith, A.M.2
Halford, N.G.3
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30
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0028171190
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Characterization of a cDNA encoding a novel DNA-binding protein, SPF1, that recognizes SP8 sequences in the 5′ upstream regions of genes coding for sporamin and beta-amylase from sweet potato
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Ishiguro S, Nakamura K Characterization of a cDNA encoding a novel DNA-binding protein, SPF1, that recognizes SP8 sequences in the 5′ upstream regions of genes coding for sporamin and beta-amylase from sweet potato. Mol Gen Genet. 28:1994;563-571.
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(1994)
Mol Gen Genet
, vol.28
, pp. 563-571
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Ishiguro, S.1
Nakamura, K.2
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31
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0032126963
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Sucrose-specific signaling represses translation of the Arabidopsis ATB2 bZIP transcription factor gene
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A novel translational control of an Arabidopsis bZIP tanscription factor by a sucrose-specific pathway is reported. The transgenic plants expressing the GUS reporter gene could be used for mutant screens to dissect the unique sucrose signaling pathway further.
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Rook F, Gerrits N, Kortstee A, van Kampen M, Borrias M, Weisbeek P, Smeekens S Sucrose-specific signaling represses translation of the Arabidopsis ATB2 bZIP transcription factor gene. Plant J. 15:1998;253-263. A novel translational control of an Arabidopsis bZIP tanscription factor by a sucrose-specific pathway is reported. The transgenic plants expressing the GUS reporter gene could be used for mutant screens to dissect the unique sucrose signaling pathway further.
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(1998)
Plant J
, vol.15
, pp. 253-263
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Rook, F.1
Gerrits, N.2
Kortstee, A.3
Van Kampen, M.4
Borrias, M.5
Weisbeek, P.6
Smeekens, S.7
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32
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0031127667
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Sucrose control of phytochrome A signaling in Arabidopsis
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Dijkwel PP, Huijser C, Weisbeeek PJ, Chua N-H, Smeekens S Sucrose control of phytochrome A signaling in Arabidopsis. Plant Cell. 9:1997;583-595.
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(1997)
Plant Cell
, vol.9
, pp. 583-595
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Dijkwel, P.P.1
Huijser, C.2
Weisbeeek, P.J.3
Chua, N.-H.4
Smeekens, S.5
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33
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0031037355
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Identification of mutants in metabolically regulated gene expression
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Martin T, Hellman H, Schmidt R, Willmitzer L, Frommer WB Identification of mutants in metabolically regulated gene expression. Plant J. 11:1997;53-62.
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(1997)
Plant J
, vol.11
, pp. 53-62
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Martin, T.1
Hellman, H.2
Schmidt, R.3
Willmitzer, L.4
Frommer, W.B.5
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34
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0031153932
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Negative regulation in the expression of a sugar-inducible gene in Arabidopsis thaliana. A recessive mutation causing enhanced expression of a gene for beta-amylase
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Mita S, Hirano H, Nakamura K Negative regulation in the expression of a sugar-inducible gene in Arabidopsis thaliana. A recessive mutation causing enhanced expression of a gene for beta-amylase. Plant Physiol. 14:1997;575-582.
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(1997)
Plant Physiol
, vol.14
, pp. 575-582
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Mita, S.1
Hirano, H.2
Nakamura, K.3
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35
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0031128306
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Mutants of Arabidopsis thaliana with pleiotropic effects on the expression of the gene for β-amylase and on the accumulation of anthocyanin that are inducible by sugars
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Mita S, Murano N, Akaike M, Nakamura K Mutants of Arabidopsis thaliana with pleiotropic effects on the expression of the gene for β-amylase and on the accumulation of anthocyanin that are inducible by sugars. Plant J. 11:1997;841-851.
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(1997)
Plant J
, vol.11
, pp. 841-851
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Mita, S.1
Murano, N.2
Akaike, M.3
Nakamura, K.4
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36
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0032544056
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Glucose and ethylene signal transduction cross-talk revealed by an Arabidopsis glucose-insensitive mutant
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The characterization of the gin1 mutant revealed a surprising cross-talk between the glucose and ethylene signaling pathways. The study also found that eto and ctr1 mutants are gin mutants and etr1 and ein2 are glo mutants. Interestingly, gin1 is a constitutive ethylene mutant similar to ctr1 but without the typical 'triple response' in the dark, suggesting that the glucose signaling pathway only interacts with a branch of the ethylene signaling pathway.
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Zhou L, Jang JC, Jones TL, Sheen J Glucose and ethylene signal transduction cross-talk revealed by an Arabidopsis glucose-insensitive mutant. Proc Natl Acad Sci USA. 95:1998;10294-10299. The characterization of the gin1 mutant revealed a surprising cross-talk between the glucose and ethylene signaling pathways. The study also found that eto and ctr1 mutants are gin mutants and etr1 and ein2 are glo mutants. Interestingly, gin1 is a constitutive ethylene mutant similar to ctr1 but without the typical 'triple response' in the dark, suggesting that the glucose signaling pathway only interacts with a branch of the ethylene signaling pathway.
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(1998)
Proc Natl Acad Sci USA
, vol.95
, pp. 10294-10299
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Zhou, L.1
Jang, J.C.2
Jones, T.L.3
Sheen, J.4
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37
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0003329817
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Regulation of the expression of rbcS and other photosynthetic genes by carbohydrates: A mechanism for the sink regulation of photosynthesis
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Krapp A, Hofmann B, Schafer C, Stitt M Regulation of the expression of rbcS and other photosynthetic genes by carbohydrates: a mechanism for the sink regulation of photosynthesis. Plant J. 3:1993;817-828.
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(1993)
Plant J
, vol.3
, pp. 817-828
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Krapp, A.1
Hofmann, B.2
Schafer, C.3
Stitt, M.4
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38
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0032516025
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Sucrose is a signal molecule in assimilate partitioning
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The authors provided the first evidence that the transcript level of a sucrose symporter is specifically regulated by sucrose but not by hexoses in sugar beets. It will be interesting to determine whether the same regulatory mechanism exists in Arabidopsis, which is more suitable for further genetic analysis.
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Choiu TJ, Bush DR Sucrose is a signal molecule in assimilate partitioning. Proc Natl Acad Sci USA. 95:1998;4784-4788. The authors provided the first evidence that the transcript level of a sucrose symporter is specifically regulated by sucrose but not by hexoses in sugar beets. It will be interesting to determine whether the same regulatory mechanism exists in Arabidopsis, which is more suitable for further genetic analysis.
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(1998)
Proc Natl Acad Sci USA
, vol.95
, pp. 4784-4788
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Choiu, T.J.1
Bush, D.R.2
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39
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0000020414
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Systemic acquired resistance mediated by the ectopic expression of invertase: Possible hexose sensing in the secretory pathway
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Herbers K, Meuwly P, Frommer WB, Metraux J-P, Sonnewald U Systemic acquired resistance mediated by the ectopic expression of invertase: possible hexose sensing in the secretory pathway. Plant Cell. 8:1996;793-803.
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(1996)
Plant Cell
, vol.8
, pp. 793-803
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Herbers, K.1
Meuwly, P.2
Frommer, W.B.3
Metraux, J.-P.4
Sonnewald, U.5
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40
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85049597308
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Plant sugar sensing and signaling - A complex reality
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A correspondence that emphasizes the complexity and uniqueness of sugar sensing and signaling in multicellular plants. Evidence was presented to support the role of HXK as one of the glucose sensors that control gene expression and development in plants.
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Moore B, Sheen J Plant sugar sensing and signaling - a complex reality. Trends Plant Sci. 4:1999;248-249. A correspondence that emphasizes the complexity and uniqueness of sugar sensing and signaling in multicellular plants. Evidence was presented to support the role of HXK as one of the glucose sensors that control gene expression and development in plants.
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(1999)
Trends Plant Sci
, vol.4
, pp. 248-249
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Moore, B.1
Sheen, J.2
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41
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0031397411
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Source strength regulates an early phase transition of tobacco shoot morphogenesis
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Tsai C-H, Miller A, Spalding M, Rodermel S Source strength regulates an early phase transition of tobacco shoot morphogenesis. Plant Physiol. 115:1997;907-914.
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(1997)
Plant Physiol
, vol.115
, pp. 907-914
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Tsai, C.-H.1
Miller, A.2
Spalding, M.3
Rodermel, S.4
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42
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0032088830
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Coordinate accumulation of antifungal proteins and hexoses constitutes a developmentally controlled defense response during fruit ripening in grape
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Salzman RA, Tikhonova I, Bordelon BP, Hasegawa PM, Bressan RA Coordinate accumulation of antifungal proteins and hexoses constitutes a developmentally controlled defense response during fruit ripening in grape. Plant Physiol. 117:1998;465-472.
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(1998)
Plant Physiol
, vol.117
, pp. 465-472
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Salzman, R.A.1
Tikhonova, I.2
Bordelon, B.P.3
Hasegawa, P.M.4
Bressan, R.A.5
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43
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0033079166
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Antisense repression of vacuolar and cell wall invertase in transgenic carrot alters early plant development and sucrose partitioning
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A very interesting paper showing that specific transgenic carrot plants could be generated with reduced vacuolar and call wall invertases. The results suggest that hexose signals are important for embryo development, shoot/root ratio and leaf morphology.
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Tang G-Q, Luscher M, Sturm A Antisense repression of vacuolar and cell wall invertase in transgenic carrot alters early plant development and sucrose partitioning. Plant Cell. 11:1999;177-189. A very interesting paper showing that specific transgenic carrot plants could be generated with reduced vacuolar and call wall invertases. The results suggest that hexose signals are important for embryo development, shoot/root ratio and leaf morphology.
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(1999)
Plant Cell
, vol.11
, pp. 177-189
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Tang, G.-Q.1
Luscher, M.2
Sturm, A.3
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44
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0032171482
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The role of carbohydrates in the induction of flowering in Arabidopsis thaliana: Comparison between the wild type and a starchless mutant
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Corbesier L, Lejeune P, Bernier G The role of carbohydrates in the induction of flowering in Arabidopsis thaliana: comparison between the wild type and a starchless mutant. Planta. 206:1998;131-137.
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(1998)
Planta
, vol.206
, pp. 131-137
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Corbesier, L.1
Lejeune, P.2
Bernier, G.3
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45
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0031702848
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High resolution histographical mapping of glucose concentrations in developing cotyledons of Vicia faba in relation to mitotic activity and storage processes: Glucose as a possible developmental trigger
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A technique has been developed to allow visualization of glucose distribution in developing bean embryos. The correlation between glucose gradients and cell division was the basis to propose that glucose might act as a morphogen.
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Borisjuk L, Walenta S, Weber H, Mueller-Klieser W, Wobus U High resolution histographical mapping of glucose concentrations in developing cotyledons of Vicia faba in relation to mitotic activity and storage processes: glucose as a possible developmental trigger. Plant J. 15:1998;583-591. A technique has been developed to allow visualization of glucose distribution in developing bean embryos. The correlation between glucose gradients and cell division was the basis to propose that glucose might act as a morphogen.
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This is the first report on the molecular analysis of glucose repressible mRNA stability. The authors showed that the sugar repression of a rice α-amylase gene is controlled at both the transcriptional and mRNA stability levels. Specific domains in the 3′UTR has been identified that can modulate mRNA stability of a reporter when assayed in transformed rice cells.
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Chan M-T, Yu S-M The 3′ untranslated region of a rice α-amylase gene functions as a sugar-dependent mRNA stability determinant. Proc Natl Acad Sci USA. 95:1998;6543-6547. This is the first report on the molecular analysis of glucose repressible mRNA stability. The authors showed that the sugar repression of a rice α-amylase gene is controlled at both the transcriptional and mRNA stability levels. Specific domains in the 3′UTR has been identified that can modulate mRNA stability of a reporter when assayed in transformed rice cells.
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When the Arabidopsis AtHXK1 is overexpressed in transgenic tomato, the growth of the plants is stunted and leaves senesce prematurely. The phenotypes are similar to some of the transgenic tobacco plants that express the yeast invertase, thus enhancing glucose and fructose signals. It is generally observed that tobacco and tomato are much more sensitive to the hexose-induced cell death and senescence than Arabidopsis. However, the HXK-mediated signaling is likely to be conserved in different plant species.
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Although the biochemical property of EIN2 is still unclear, ein2 is one of the most interesting ethylene mutants, as it plays a convergent role in linking ethylene signaling to glucose, jasmonate, oxidative stress, and pathogen responses. Understanding the molecular and biochemical basis of EIN2 function will unravel new insights into plant signaling network. Overexpressing the carboxy-terminus of EIN2 confers a constitutive ethylene response phenotype without the classical triple response, which is similar to the phenotype first found in gin1.
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The discovery of the plant genes encoding the prokaryotic PII-like proteins suggests that a similar role in monitoring nitrogen and carbon balance could be carried out by this regulatory effector in chloroplasts where the plant PII-like protein is located. A role of the PII-like protein in transcriptional regulation will require communication between the chloroplast and nucleus.
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Hsieh M-H, Lam H-M, van de Loo FJ, Coruzzi G A PII-like protein in Arabidopsis: putative role in nitrogen sensing. Proc Natl Acad Sci USA. 95:1998;13965-13970. The discovery of the plant genes encoding the prokaryotic PII-like proteins suggests that a similar role in monitoring nitrogen and carbon balance could be carried out by this regulatory effector in chloroplasts where the plant PII-like protein is located. A role of the PII-like protein in transcriptional regulation will require communication between the chloroplast and nucleus.
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Proc Natl Acad Sci USA
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Hsieh, M.-H.1
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64
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This report opens up an exciting possibility that evolutionarily conserved amino acid receptors could serve important functions in metabolic signaling in plants.
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Lam H-M, Chiu J, Hsieh M-H, Meisel L, Oliveira IC, Shin M, Coruzzi G Glutamate-receptor genes in plants. Nature. 396:1998;125-126. This report opens up an exciting possibility that evolutionarily conserved amino acid receptors could serve important functions in metabolic signaling in plants.
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Lam, H.-M.1
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65
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A response-regulator homologue possibly involved in nitrogen signal transduction mediated by cytokinin in maize
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This research group is the first to establish that nitrate can serve as an important signal to control the transcription and mRNA stability of key photosynthesis genes in maize. Their model suggests that the nitrate signal perceived in roots is converted to a dramatic increase in cytokinin levels. It is the cytokinin signal that is then translocated to the shoots and activates gene expression.
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Sakakibara H, Suzuki M, Takei K, Deji A, Taniguchi M, Sugiyama T A response-regulator homologue possibly involved in nitrogen signal transduction mediated by cytokinin in maize. Plant J. 14:1998;337-344. This research group is the first to establish that nitrate can serve as an important signal to control the transcription and mRNA stability of key photosynthesis genes in maize. Their model suggests that the nitrate signal perceived in roots is converted to a dramatic increase in cytokinin levels. It is the cytokinin signal that is then translocated to the shoots and activates gene expression.
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Plant J
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Takei, K.3
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66
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Plant Cell
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Scheible, W.-R.1
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Muller-Rober, B.4
Caboche, M.5
Stitt, M.6
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