Root gravitropism

Plant Roots: The Hidden Half, Fourth Edition

Volumn , Issue , 2013, Pages 265-278

  Swarup, Ranjan ^a   Wells, Darren M ^a   Bennett, Malcolm J ^a  

^a UNIVERSITY OF NOTTINGHAM   (United Kingdom)

Author keywords

[No Author keywords available]

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EID: 85054697925     PISSN: None     EISSN: None     Source Type: Book    
DOI: None     Document Type: Chapter

References (159)

1. Abas L, Benjamins R, Malenica N, et al. 2006. Intracellular trafficking and proteolysis of the Arabidopsis auxin-efflux facilitator PIN2 are involved in root gravitropism. Nat Cell Biol 8: 249-256.
2. Abel S, Theologis A. 1996. Early genes and auxin action. Plant Physiol 111: 9-17.
3. Aloni R, Langhans M, Aloni E, Ullrich CI. 2004. Role of cytokinin in the regulation of root gravitropism. Planta 220: 177-182.
4. Band LR, Wells DM, Larrieu A, et al. 2012. Root gravitropism is regulated by a transient lateral auxin gradient controlled by a novel tipping point mechanism. Proc Natl Acad Sci USA 109: 4668-4673.
5. Barlow PW. 1974. Regeneration of cap of primary roots of Zea-mays. New Phytol 73: 937.
6. Barlow PW. 1995. Gravity perception in plants: A multiplicity of systems derived by evolution? Plant Cell Environ 18: 951-962.
7. Basu P, Zhang YJ, Lynch JP, Brown KM. 2007. Ethylene modulates genetic, positional, and nutritional regulation of root plagiogravitropism. Funct Plant Biol 34: 41-51.
8. Beemster G, Baskins T. 2001. Stunted Plant1 mediates effects of cytokinin, not auxin, on cell division and expansion in the root of Arabidopsis. Plant Physiol 124: 1718-1727.
9. Bennett MJ, Marchant A, Green HG, et al. 1996. Arabidopsis AUX1 gene: A permease-like regulator of root gravitropism. Science 273: 948-950.
10. Blakeslee JJ, Bandyopadhyay A, Lee OR, et al. 2007. Interactions among PIN-FORMED and P-glycoprotein auxin transporters in Arabidopsis. Plant Cell 19: 131-147.
11. Blancaflor EB, Fasano JM, Gilroy S. 1998. Mapping the functional roles of cap cells in the response of Arabidopsis primary roots to gravity. Plant Physiol 116: 213-222.
12. Blancaflor EB, Masson PH. 2003. Plant gravitropism. Unraveling the ups and downs of a complex process. Plant Physiol 133: 1677-1690.
13. Blilou I, Xu J, Wildwater M, et al. 2005. The PIN auxin efflux facilitator network controls growth and patterning in Arabidopsis roots. Nature 433: 39-44.
14. Boonsirichai K, Guan C, Chen R, Masson PH. 2002. Root gravitropism: An experimental tool to investigate basic cellular and molecular processes underlying mechanosensing and signal transmission in plants. Annu Rev Plant Biol 53: 421-447.
15. Boonsirichai K, Sedbrook JC, Chen RJ, Gilroy S, Masson PH. 2003. Altered response to gravity is a peripheral membrane protein that modulates gravity-induced cytoplasmic alkalinization and lateral auxin transport in plant statocytes. Plant Cell 15: 2612-2625.
16. 2. Plant Physiol 115: 87-92.
17. Brooks T, Miller N, Spalding EP. 2010. Plasticity of Arabidopsis root gravitropism throughout a multidimensional condition space quantified by automated image analysis. Plant Physiol 152: 206-216.
18. Brunoud G, Wells DM, Oliva M, et al. 2012 A novel sensor to map auxin response and distribution at high spatio-temporal resolution. Nature 482: 103-108.
19. Buer CS, Sukumar P, Muday, GK. 2006. Ethylene modulates flavonoid accumulation and gravitropic responses in roots of Arabidopsis. Plant Physiol 140: 1384-1396.
20. Chavarría-Krauser A. 2006. Quantification of curvature production in cylindrical organs such as roots and hypocotyls. New Phytol 171: 633-641.
21. Chavarría-Krauser A, Nagel KA, Palme K, Schurr U, Walter A, Scharr H. 2008. Spatio-temporal quantification of differential growth processes in root growth zones based on a novel combination of image sequence processing and refined concepts describing curvature production. New Phytol 177: 811-821.
22. Chen RJ, Hilson P, Sedbrook J, Rosen E, Caspar T, Masson PH. 1998. The Arabidopsis thaliana AGRAVITROPIC1 gene encodes a component of the polar-auxin-transport efflux carrier. Proc Natl Acad Sci USA 95: 15112-15117.
23. Cholodny N. 1927. Wuchshormone und Tropismen bei den Panzen. Biol Zent 47: 604-626.
24. Collings DA, Zsuppan G, Allen NS, Blancaflor EB. 2001. Demonstration of prominent actin filaments in the root columella. Planta 212: 392-403.
25. Cosgrove DJ. 1998. Cell wall loosening by expansins. Plant Physiol 118: 333-339.
26. Cosgrove DJ. 2000. Loosening of plant cell walls by expansions. Nature 407: 321-326.
27. Darwin C. 1881. The Power of Movement in Plants. London, U.K.: John Murray.
28. Deruere J, Jackson K, Garbers C, Soll D, DeLong A. 1999. The RCN1-encoded a subunit of protein phosphatase 2A increases phosphatase activity in vivo. Plant J 20: 389-399.
29. Dharmasiri N, Dharmasiri S, Estelle M. 2005a. The F-box protein TIR1 is an auxin receptor. Nature 435: 441-445.
30. Dharmasiri N, Dharmasiri S, Weijers D, et al. 2005b. Plant development is regulated by a family of auxin receptor f box proteins. Dev Cell 9: 109-119.
31. Dharmasiri S, Swarup R, Mockaitis K, et al. 2006. AXR4 is required for localization of the auxin influx facilitator AUX1. Science 312: 1218-1220.
32. Dhonukshe P, Huang F, Galvan-Ampudia C, et al. 2010. Plasma membrane-bound AGC3 kinases phosphorylate PIN auxin carriers at TPRXS(N/S) motifs to direct apical PIN recycling. Development 137: 3245-3255.
33. Dodart L. 1700. Sur l’ affection de la perpendiculaire remarquable dans toutes les tiges, dans plusieurs raciness, et autant qu’il est possible dans toutes les branches des plantes. Hist Acad Roy Sci 61: 47-63.
34. Durner J, Klessig DF. 1999. Nitric oxide as a signal in plants. Curr Opin Plant Biol 2: 396-374.
35. Durner J, Wendehenne D, Klessig DF. 1998. Defense gene induction in tobacco by nitric oxide, cyclic GMP, and cyclic ADPribose. Proc Natl Acad Sci USA 95: 10328-10333.
36. Effendi Y, Rietz S, Fischer U, Scherer G. 2011. The heterozygous abp1/ABP1 insertional mutant has defects in functions requiring polar auxin transport and in regulation of early auxin-regulated genes. Plant J 65: 282-294.
37. Esmon CA, Pedmale UV, Liscum E. 2005. Plant tropisms: Providing the power of movement to a sessile organism. Int J Dev Biol 49: 665-674.
38. Evans ML. 1986. Role of calcium in gravity perception of plant roots. Adv Space Res 6: 61-65.
39. Fasano JM, Swanson SJ, Blancaflor EB, Dowd PE, Kao TH, Gilroy S. 2001. Changes in root cap pH are required for the gravity response of the Arabidopsis root. Plant Cell 13: 907-921.
40. Feijo JA, et al. 1999. Growing pollen tubes possess a constitutive alkaline band in the clear zone and a growth-dependent acidic tip. J Cell Biol 144: 483-496.
41. Fitzelle KJ, Kiss JZ. 2001. Restoration of gravitropic sensitivity in starch-deficient mutants of Arabidopsis by hypergravity. J Exp Bot 52: 265-275.
42. French A, Ubeda-Tomás S, Holman TJ, Bennett MJ, Pridmore T. 2009. High-throughput quantification of root growth using a novel image-analysis tool. Plant Physiol 150: 1784-1795.
43. Friml J, Wisniewska J, Benkova E, Mendgen K, Palme K. 2002. Lateral relocation of auxin efflux regulator PIN3 mediates tropism in Arabidopsis. Nature 415: 806-809.
44. Fukaki H, Nakao Y, Okushima Y, Theologis A, Tasaka M. 2005. Tissue-specific expression of stabilized SOLITARY-ROOT/IAA14 alters lateral root development in Arabidopsis. Plant J 44: 382-395.
45. Fukaki H, Tameda S, Masuda H, Tasaka M. 2002. Lateral root formation is blocked by a gain-of-function mutation in the SOLITARY-ROOT/IAA14 gene of Arabidopsis. Plant J 29: 153-168.
46. Garbers C, DeLong A, Deruere J, Bernasconi P, Soll D. 1996. A mutation in protein phosphatase 2A regulatory subunit A affects auxin transport in Arabidopsis. EMBO J 15: 2115-2124.
47. Geldner N, Anders N, Wolters H, et al. 2003. The Arabidopsis GNOM ARF-GEF mediates endosomal recycling, auxin transport, and auxin-dependent plant growth. Cell 112: 219-230.
48. Geldner N, Richter S, Vieten A, et al. 2004. Partial loss-of-function alleles reveal a role for GNOM in auxin transport-related, post-embryonic development of Arabidopsis. Development 131: 389-400.
49. Guan CH, Rosen ES, Boonsirichai K, Poff KL, Masson PH. 2003. The ARG1-LIKE2 gene of Arabidopsis functions in a gravity signal transduction pathway that is genetically distinct from the PGM pathway. Plant Physiol 133: 100-112.
50. Han W, Rong H, Zhang H, Wanga M-H. 2009. Abscisic acid is a negative regulator of root gravitropism in Arabidopsis thaliana. Biochem Biophys Res Commun 378: 695-700.
51. Hobbie L, Estelle M. 1995. The axr4 auxin-resistant mutants of Arabidopsis thaliana define a gene important for root gravitropism and lateral root initiation. Plant J 7: 211-220.
52. Hou GC, Kramer VL, Wang YS, et al. 2004. The promotion of gravitropism in Arabidopsis roots upon actin disruption is coupled with the extended alkalinization of the columella cytoplasm and a persistent lateral auxin gradient. Plant J 39: 113-125.
53. Hu X, Neill SJ, Tang Z, Cai W. 2005. Nitric oxide mediates gravitropic bending in Soybean roots. Plant Physiol 137: 663-670.
54. Huang F, Zago M, Abas L, Marion A, Galván-Ampudia C, Offringa R. 2010. Phosphorylation of conserved pin motifs directs Arabidopsis PIN1 polarity and auxin transport. Plant Cell 22: 1129-1142.
55. Ishikawa H, Evans ML. 1997. Novel software for analysis of root gravitropism: Comparative response patterns of Arabidopsis wild-type and axr1 seedlings. Plant Cell Environ 20: 919-928.
56. Joo JH, Bae YS, Lee JS. 2001. Role of auxin-induced reactive oxygen species in root gravitropism. Plant Physiol 126: 1055-1060.
57. Joo JH, Yoo HJ, Hwang I, Lee JS, Nam KH, Bae YS. 2005. Auxin-induced reactive oxygen species production requires the activation of phosphatidylinositol 3-kinase. FEBS Lett 579: 1243-1248.
58. Jouhet J, Gray JC. 2009. Interaction of actin and the chloroplast protein import apparatus. J Biol Chem 284: 19132-19141.
59. Kepinski S, Leyser O. 2005. The Arabidopsis F-box protein TIR1 is an auxin receptor. Nature 435: 446-451.
60. Kieffer M, Neve J, Kepinski S. 2010. Defining auxin response contexts in plant development. Curr Opin Plant Biol 13: 12-20.
61. Kimbrough JM, Salinas-Mondragon R, Boss WE, Brown CS, Sederoff HW. 2004. The fast and transient transcriptional network of gravity and mechanical stimulation in the Arabidopsis root Apex. Plant Physiol 136: 2790-2805.
62. Kiss JZ, Wright, JB, Caspar T. 1996. Gravitropism in roots of intermediate-starch mutants of Arabidopsis. Physiol Plant 97: 237-244.
63. Kleine-Vehn J, Dinga Z, Jones R, Tasaka M, Morita M, Friml J. 2010. Gravity-induced PIN transcytosis for polarization of auxin fluxes in gravity-sensing root cells. Proc Natl Acad Sci USA 107: 22344-22349.
64. Knight TA. 1806. On the direction of the radicle and germen during the vegetation of seeds. Phil Trans R Soc Lond B 99: 108-120.
65. Kondrachuk AV, Starkov VN. 2011. Modeling the kinetics of root gravireaction. Microgr Sci Technol 23: 221-225.
66. Konings H. 1995. Gravitropism of roots-An evaluation of progress during the last 3 decades. Acta Bot Neerl 44: 195-223.
67. Kramer EM, Bennett MJ. 2006. Auxin transport: A field in flux. Trends Plant Sci 11: 382-386.
68. Kutschera U. 1989. Tissue stresses in growing plant organs. Physiol Plant 77: 157-163.
69. Kuznetsov OA, Hasenstein KH. 1996. Intracellular magnetophoresis of amyloplasts and induction of root curvature. Planta 198: 87-94.
70. LaMotte CE, Pickard BG. 2004. Control of gravitropic orientation. II. Dual receptor model for Gravitropism. Funct Plant Biol 31: 109-120.
71. Laskowski M, Grieneisen VA, Hofhuis H, et al. 2008. Root system architecture from coupling cell shape to auxin transport. PLoS Biol 6: e307.
72. Lee J, Mulkey T, Evans ML. 1983. Gravity-induced polar transport of calcium across root tips of maize. Plant Physiol 73: 874-876.
73. Lee J, Mulkey T, Evans ML. 1984. Inhibition of polar calcium movement and gravitropism in roots treated with auxin-transport inhibitors. Planta 160: 536-543.
74. Leitz G, Kang B-H, Schoenwaelder M, Staehelin A. 2009. Statolith sedimentation kinetics and force transduction to the cortical endoplasmic reticulum in gravity-sensing Arabidopsis columella cells. Plant Cell 21: 843-860.
75. Leyser O. 2006. Dynamic integration of auxin transport and signalling. Curr Biol 16: R424-R433.
76. Leyser O. 2011. Auxin, self-organization, and the colonial nature of plants. Curr Biol 21: R331-R337.
77. Leyser HMO, Lincoln CA, Timpte C, Lammer D, Turner J, Estelle M. 1993. Arabidopsis auxin-resistance gene AXR1 encodes a protein related to ubiquitin-activating enzyme-E1. Nature 364: 161-164.
78. Leyser HMO, Pickett FB, Dharmasiri S, Estelle M. 1996. Mutations in the AXR3 gene of Arabidopsis result in altered auxin response including ectopic expression from the SAUR-AC1 promoter. Plant J 10: 403-413.
79. Li L, Xu J, Xu ZH, Xue HW. 2005. Brassinosteroids stimulate plant tropisms through modulation of polar auxin transport in Brassica and Arabidopsis. Plant Cell 17: 2738-2753.
80. Li G, Xue HW. 2007. Arabidopsis PLDζ2 regulates vesicle trafficking and is required for auxin response. Plant Cell 19: 281-295.
81. Lin RC, Wang HY. 2005. Two homologous ATP-binding cassette transporter proteins, AtMDR1 and AtPGP1, regulate Arabidopsis photomorphogenesis and root development by mediating polar auxin transport. Plant Physiol 138: 949-964.
82. Luschnig C, Gaxiola R, Grisafi P, Fink G. 1998. EIR1, a root-specific protein involved in auxin transport, is required for gravitropism in Arabidopsis thaliana. Genes Dev 12: 2175-2187.
83. Lynch JP, Brown KM. 2001. Topsoil foraging-An architectural adaptation of plants to low phosphorus availability. Plant Soil 237: 225-237.
84. Ma Z, Hasenstein KH. 2006. The onset of gravisensitivity in the embryonic root of flax. Plant Physiol 140: 159-166.
85. MacCleery SA, Kiss JZ. 1999. Plastid sedimentation kinetics in roots of wild-type and starch-deficient mutants of Arabidopsis. Plant Physiol 120: 183-192.
86. Marchant A, Kargul J, May ST, et al. 1999. AUX1 regulates root gravitropism in Arabidopsis by facilitating auxin uptake within root apical tissues. EMBO J 18: 2066-2073.
87. Miller ND, Brooks T, Assadi A, Spalding EP. 2010. Detection of a gravitropism phenotype in glutamate receptor-like 3.3 mutants of Arabidopsis thaliana using machine vision and computation. Genetics 186: 585-593.
88. Molas ML, Kiss JZ. 2009. Phototropism and gravitropism in plants. Adv Bot Res 49: 1-34.
89. Molisch H. 1884. Ueber die Ablenkung der Wurzeln von ihrer normalen Wachsthumsrichtung durch Gase (Aerotropismus). Ber Dtsch Bot Ges 2: 160-169.
90. Monshausen GB, Bibikova TN, Messerli MA, Shi C, Gilroy S. 2007. Oscillations in extracellular pH and reactive oxygen species modulate tip growth of Arabidopsis root hairs. Proc Natl Acad Sci USA 104: 20996-21001.
91. ++ follow oscillating increases in growth in root hairs of Arabidopsis. Plant Physiol 147: 1690-1698.
92. 2+ and pH signaling in root growth revealed by integrating high-resolution imaging with automated computer vision-based analysis. Plant J 65: 309-318.
93. Morita MT. 2010 Directional gravity sensing in gravitropism. Annu Rev Plant Biol 61: 705-720.
94. Morita MT, Tasaka M. 2004. Gravity sensing and signalling. Curr Opin Plant Biol 7: 712-718.
95. Muday GK. 2001. Auxins and tropisms. J Plant Growth Regul 20: 226-243.
96. Mullen JL, Hangarter RP. 2003. Genetic analysis of the gravitropic setpoint angle in lateral roots of Arabidopsis. Adv Space Res 31: 2229-2236.
97. Mullen JL, Ishikawa H, Evans ML. 1998a. Analysis of changes in relative elemental growth rate patterns in the elongation zone of Arabidopsis roots upon gravistimulation. Planta 206: 598-603.
98. Mullen JL, Turk E, Johnson K, et al. 1998b. Root-growth behavior of the Arabidopsis mutant rgr1-Roles of gravitropism and circumnutation in the waving/coiling phenomenon. Plant Physiol 118: 1139-1145.
99. Mullen JL, Wolverton C, Ishikawa H, Evans ML. 2000. Kinetics of constant gravitropic stimulus responses in Arabidopsis roots using a feedback system. Plant Physiol 123: 665-670.
100. Müller A, Guan C, Gälweiler L, et al. 1998. AtPIN2 defines a locus of Arabidopsis for root gravitropism control. EMBO J 17: 6903-6911.
101. Na X, Hu Y, Yue K, et al. 2011. Narciclasine modulates polar auxin transport in Arabidopsis roots. J Plant Physiol 168: 1149-1156.
102. Nagpal P, Walker LM, Young JC, et al. 2000. AXR2 encodes a member of the Aux/IAA protein family. Plant Physiol 123: 563-573.
103. Okushima Y, Overvoorde PJ, Arima K, et al. 2005. Functional genomic analysis of the auxin response factor gene family members in Arabidopsis thaliana: Unique and overlapping functions of ARF7 and ARF19. Plant Cell 17: 444-463.
104. Ottenschlager I, Wolff P, Wolverton C, et al. 2003. Gravity-regulated differential auxin transport from columella to lateral root cap cells. Proc Natl Acad Sci USA 100: 2987-2991.
105. Paciorek T, Zazimalova E, Ruthardt N, et al. 2005. Auxin inhibits endocytosis and promotes its own efflux from cells. Nature 435: 1251-1256.
106. Perbal G. 2009. From roots to GRAVI-1: Twenty five years for understanding how plants sense gravity. Microgravity Sci Technol 21: 3-10.
107. Perbal G, Driss-Ecole D. 2003. Mechanotransduction in gravisensing cells. Trends Plant Sci 8: 498-504.
108. Perera IY, Hung CY, Brady S, Muday GK, Boss WF. 2006. A universal role for inositol 1,4,5-trisphosphate-mediated signaling in plant gravitropism. Plant Physiol 140: 746-760.
109. Philosoph-Hadas S, Friedman H, Meir S. 2005. Gravitropic bending and plant hormones. Vitam Horm 72: 31-78.
110. Porterfield DM. 2002. The biophysical limitations in physiological transport and exchange in plants grown in microgravity. J Plant Growth Regul 21: 177-190.
111. Rahman A, Takahashi M, Shibasaki A, et al. 2010. Gravitropism of Arabidopsis thaliana roots requires the polarization of PIN2 toward the root tip in meristematic cortical cells. Plant Cell 22: 1762-1776.
112. Rashotte AM, Brady SR, Reed RC, Ante SJ, Muday GK. 2000. Basipetal auxin transport is required for gravitropism in roots of Arabidopsis. Plant Physiol 122: 481-490.
113. Rashotte AM, DeLong A, Muday GK. 2001. Genetic and chemical reductions in protein phosphatase activity alter auxin transport, gravity response and lateral root growth. Plant Cell 13: 1683-1697.
114. Reboulet J, Kumar P, Kiss J. 2010. DIS1 and DIS2 play a role in tropisms in Arabidopsis thaliana. Env Exp Bot 67: 474-478.
115. Robert S, Kleine-Vehn J, Barbez Elke, et al. 2010. ABP1 mediates auxin inhibition of clathrin dependent endocytosis in Arabidopsis. Cell 143: 111-121.
116. Robert HS, Offringa R. 2008. Regulation of auxin transport polarity by AGC kinases. Curr Opin Plant Biol 11: 495-502.
117. Rouse D, Mackay P, Stirnberg P, Estelle M, Leyser, HMO. 1998. Changes in auxin response from mutations in an AUX/IAA gene. Science 279: 1371-1373.
118. Ruegger M, Dewey E, Gray WM, Hobbie L, Turner J, Estelle M. 1998. The TIR1 protein of Arabidopsis functions in auxin response and is related to human SKP2 and yeast Grr1p. Genes Dev 12: 198-207.
119. Sack FD. 1991. Plant gravity sensing. Int Rev Cytol 127: 193-252.
120. Sack FD. 1997. Plastids and gravitropic sensing. Planta 203: S63-S68.
121. Santelia D, Vincenzetti V, Azzarello E, et al. 2005. MDR-like ABC transporter AtPGP4 is involved in auxin-mediated lateral root and root hair development. FEBS Lett 579: 5399-5406.
122. Scott AC, Allen NS. 1999. Changes in cytosolic pH within Arabidopsis root columella cells play a key role in the early signaling pathway for root gravitropism. Plant Physiol 121: 1291-1298.
123. Sedbrook JC, Chen RJ, Masson PH. 1999. ARG1 (Altered Response to Gravity) encodes a DnaJ-like protein that potentially interacts with the cytoskeleton. Proc Natl Acad Sci USA 96: 1140-1145.
124. Sethuraman V, Taylor S, Pridmore T, French A, Wells D. 2009. Segmentation and tracking of confocal images of Arabidopsis thaliana root cells using automatically-initialized network snakes. In Proceedings of 3rd International Conference on Bioinformatics and Biomedical Engineering, June 11-13, 2009, pp. 2243-2246. Piscataway, NJ: Institute of Electrical and Electronics Engineers.
125. Shin HS, Guo ZB, Blancaflor EB, Masson PH, Chen RJ. 2005. Complex regulation of Arabidopsis AGR1/PIN2-mediated root gravitropic response and basipetal auxin transport by cantharidin-sensitive protein phosphatases. Plant J 42: 188-200.
126. Sievers A, Buchen B, Volkman D, Hejnowicz Z. 1991. Role of cytoskeleton in gravity perception. In The Cytoskeletal Basis of Plant Growth and Form (ed.), CW Lloyd, pp. 169-182. London, U.K.: Academic Press.
127. Stanga J, Boonsirichai K, Sedbrook J, Otegui M, Masson PH. 2009. A role for the TOC complex in Arabidopsis root gravitropism. Plant Physiol 149: 1896-1905.
128. Sukumar P, Edwards K, Rahman A, DeLong A, Muday GK. 2009. Pinoid kinase regulates root gravitropism through modulation of PIN2-dependent basipetal auxin transport in Arabidopsis. Plant Physiol 150: 722-735.
129. Swarup R, Bennett MJ. 2009. Root gravitropism. Ann Plant Rev 37: 157-174.
130. Swarup R, Friml J, Marchant A, et al. 2001. Localization of the auxin permease AUX1 suggests two functionally distinct hormone transport pathways operate in the Arabidopsis root apex. Genes Dev 15: 2648-2653.
131. Swarup R, Kargul J, Marchant A, et al. 2004. Structure-function analysis of the presumptive Arabidopsis auxin permease AUX1. Plant Cell 16: 3069-3083.
132. Swarup R, Kramer EM, Perry P, et al. 2005. Root gravitropism requires lateral root cap and epidermal cells for transport and response to a mobile auxin signal. Nat Cell Biol 7: 1057-1065.
133. Swarup R, Perry P, Hagenbeek D, et al. 2007. Ethylene up regulates auxin biosynthesis in Arabidopsis seedlings to enhance inhibition of root cell elongation. Plant Cell 19: 2186-2196.
134. Tanaka A, Kobayashi Y, Hase Y, Watanabe H. 2002. Positional effect of cell inactivation on root gravitropism using heavy-ion microbeams. J Exp Bot 53: 683-687.
135. Tasaka M, Kato T, Fukaki H. 2001. Genetic regulation of gravitropism in higher plants. Int Rev Cytol 206: 135-154.
136. Terasaka K, Blakeslee JJ, Titapiwatanakun B, et al. 2005. PGP4, an ATP binding casette p-glycoprotein, catalyzes auxin transport in Arabidopsis thaliana roots. Plant Cell 17: 2922-2939.
137. Tian Q, Reed JW. 1999. Control of auxin-regulated root development by the Arabidopsis thaliana SHY2/IAA3 gene. Development 126: 711-721.
138. Timpte C, Wilson AK, Estelle M. 1994. The AXR2-1 mutation of Arabidopsis thaliana is a gain-of-function mutation that disrupts an early step in auxin response. Genetics 138: 1239-1249.
139. Tiwari SB, Hagen G, Guilfoyle T. 2003. The roles of auxin response factor domains in auxin-responsive transcription. Plant Cell 15: 533-543.
140. Tiwari SB, Wang X-J, Hagen G, Guilfoyle TJ. 2001. AUX/IAA proteins are active repressors, and their stability and activity are modulated by auxin. Plant Cell 13: 2809-2822.
141. Tromas A, Braun N, Muller P, et al. 2009. The auxin binding protein 1 is required for differential auxin responses mediating root growth. PLoS One 4: e6648.
142. Tromas A, Paponov I, Perrot-Rechenmann C. 2010. Auxin binding protein 1: Functional and evolutionary aspects. Trends Plant Sci 15: 436-446.
143. Vicente-Agullo F, Rigas S, Desbrosses G, Dolan L, Hatzopoulos P, Grabov A. 2004. Potassium carrier TRH1 is required for auxin transport in Arabidopsis roots. Plant J 40: 523-535.
144. Vissenberg K, Oyama M, Osato Y, Yokoyama R, Verbelen J-P, Nishitani K. 2005. Differential expression of AtXTH17, AtXTH18, AtXTH19 and AtXTH20 genes in Arabidopsis roots. Physiological roles in specification in cell wall construction. Plant Cell Physiol 46: 192-200.
145. Weijers D, Benkova E, Jager KE, et al. 2005. Developmental specificity of auxin response by pairs of ARF and Aux/IAA transcriptional regulators. EMBO J 24: 1874-1885.
146. Went F. 1926. On growth accelerating substances in the coleoptile of Avena sativa. Proc Kon Ned Akad Weten 30: 1019.
147. Wiśniewska J, Xu J, Seifertová D, et al. 2006. Polar PIN localization directs auxin flow in plants. Science 312: 883.
148. Wolverton C, Ishikawa H, Evans ML. 2002a. The kinetics of root gravitropism: Dual motors and sensors. J Plant Growth Regul 21: 102-112.
149. Wolverton C, Mullen JL, Ishikawa H, Evans ML. 2002b. Root gravitropism in response to a signal originating outside of the cap. Planta 215: 153-157.
150. Wolverton C, Paya AM, Toska J. 2011. Root cap angle and gravitropic response rate are uncoupled in the Arabidopsis pgm-1 mutant. Physiol Plant 141: 373-382.
151. Xu T, Wen M, Nagawa S, Fu Y, et al. 2010. Cell surface- and rho GTPase-based auxin signaling controls cellular interdigitation in Arabidopsis. Cell 143: 99-110.
152. Yamada Y, Greenham K, Prigge MJ, Jensen PJ, Estelle M. 2009. The transport inhibitor response 2 gene is required for auxin synthesis and diverse aspects of plant development. Plant Physiol 151: 168-179.
153. Yamazoe A, Hayashi K, Kepinski S, Leyser O, Nozaki H. 2005. Characterization of terfestatin A, a new specific inhibitor for auxin signalling. Plant Physiol 139: 779-789.
154. Yang YD, Hammes UZ, Taylor CG, Schachtman DP, Nielsen E. 2006. High-affinity auxin transport by the AUX1 influx carrier protein. Curr Biol 16: 1123-1127.
155. Young LS, Harrison BR, Narayana MUM, Moffatt BA, Gilroy S, Masson PH. 2006. Adenosine kinase modulates root gravitropism and cap morphogenesis in Arabidopsis. Plant Physiol 142: 564-573.
156. Zhang J, Nodzynski T, Pencík A, Rolcík J, Friml J. 2010. PIN phosphorylation is sufficient to mediate PIN polarity and direct auxin transport. Proc Natl Acad Sci USA 107: 918-922.
157. Zheng HQ, Staehelin LA. 2001. Nodal endoplasmic reticulum, a specialized form of endoplasmic reticulum found in gravity-sensing root tip columella cells. Plant Physiol 125: 252-265.
158. Zhu T, Chang HS, Wang X, Feldman LJ. 2002. Transcription profiling of the early gravitropic response in Arabidopsis using high-density oligonucleotide probe microarrays. Plant Physiol 130: 720-728.
159. Zourelidou M, Müller I, Willige BO, Nill C, Jikumaru Y, Li H, Schwechheimer C. 2009. The polarly localized D6 protein kinase is required for efficient auxin transport in Arabidopsis thaliana. Development 136: 627-636.