Molecular improvement of tropical maize for drought stress tolerance in Sub-Saharan Africa

Critical Reviews in Plant Sciences

Volumn 28, Issue 1-2, 2009, Pages 16-35

  Anami, Sylvester ^a,b   De Block, Marc ^c   MacHuka, Jesse ^a   Van Lijsebettens, Mieke ^b  

^a KENYATTA UNIVERSITY   (Kenya)

^b GHENT UNIVERSITY   (Belgium)

^c Bayer sa nv Belgium   (Belgium)

Author keywords

Conventional breeding; Drought stress; Genetic engineering; Tropical maize

Indexed keywords

AGROBACTERIUM; GLYCINE MAX; HEXAPODA; RHIZOBIUM; TRITICUM AESTIVUM; ZEA MAYS;

EID: 65349139419     PISSN: 07352689     EISSN: 15497836     Source Type: Journal    
DOI: 10.1080/07352680802665305     Document Type: Article

References (158)

1. Abebe, T., Guenzi, A. C., Martin, B., and Cushman, J. C. 2003. Tolerance of mannitol-accumulating transgenic wheat to water stress and salinity. Plant Physiol. 131: 1748-1755.
2. Ahlfors, R., Lång, S., Overmyer, K., Jaspers, P., Brosche, M., Tauriainen, A., Kollist, H., Tuominen, H., Belles-Boix, E., Piippo, M., Inze, D., Palva, E. T., and Kangasjarvi, J. 2004. Arabidopsis RADICAL-INDUCED CELL DEATH1 belongs to the WWE protein-protein interaction domain protein family and modulates abscisic acid, ethylene, and methyl jasmonate responses. Plant Cell 16: 1925-1937.
3. Alvarez, J. P., Pekker, I., Goldshmidt, A., Blum, E., Amsellem, Z., and Eshed, Y. 2006. Endogenous and synthetic microRNAs stimulate simultaneous, ef-ficient, and localized regulation of multiple targets in diverse species. Plant Cell 18: 1134-1151.
4. Alvarez, S., Marsh, L. E., Schoeder, S. G., and Schachtman, D. P. 2008. Metabolomicandproteomicchanges inthexylemsapofmaizeunderdrought. Plant Cell Environ. 31: 325-340.
5. Amtmann, A., Bohnert, H. J., and Bressan, R. A. 2005. Abiotic stress and plant genome evolution. Search for new models. Plant Physiol. 138: 127-130.
6. Anami, E. S., Mguu, J. A., Hanley-Bowdoin, L., Rasha, A. O., Nelissen, H., Inze, D., Van Lijsebettens, M., and Machuka, J. 2008. Progress in transformation and regeneration of tropical inbred maize lines in Kenya. Maize Genet. Coop. Newslett. 82: 22-23.
7. Apel, K., and Hirt, H. 2004. Reactive oxygen species: metabolism, oxidative stress, and signal transduction. Annu. Rev. Plant Biol. 55: 373-399.
8. 3 cereals: What should we breed for? Ann. Bot. 89:925-940.
9. Barnabás, B., Jäger, K., and Fehér, A. 2008. The effect of drought and heat stress on reproductive processes in cereals. Plant Cell Environ. 31: 11-38.
10. Bartels, D., and Sunkar, R. 2005. Drought and salt tolerance in plants. Crit. Rev. Plant Sci. 24: 23-58.
11. Benchimol, L. L., de Souza Jr, C. L., Garcia, A. A. F., Kono, P. M. S., Mangolin, C. A., Barbosa, A. M. M., Coelho, A. S. G., and de Souza, A. P. 2000. Genetic diversity in tropical maize inbred lines: heterotic group assignment and hybrid performance determined by RFLP markers. Plant Breed. 119: 491-496.
12. Binott, J. J., Songa, J. M., Ininda, J., Njagi, E. M., and Machuka, J. 2008. Plant regeneration from immature embryos of Kenyan maize inbred lines and their respective single cross hybrids through somatic embryogenesis. Afr. J. Biotechnol. 7: 981-987.
13. Bohorova, N., Fenell, S., Malean, S., Pellegrineschi, A., and Hoisington, D. 1999. Laboratory Protocols. Mexico, CIMMYT Applied Genetic Engineering Laboratory. Bohorova, N. E., Luna, B., Brito, R. M., Huerta, L. D., and Hoisington, D. A. 1995. Regeneration potential of tropical, subtropical, midaltitude, and highland maize inbreds. Maydica 40: 275-281.
14. Bruhat, A., Chérasse, Y., Maurin, A.-C., Breitwieser, W., Parry, L., Deval, C., Jones, N., Jousse, C., and Fafournoux P. 2007. ATF2 is required for amino acid-regulated transcription by orchestrating specific histone acetylation. Nucleic Acids Res. 35: 1312-1321.
15. Brunk, D. G., Rich, P. J., and Rhodes, D. 1989. Genotypic variation for glycine-betaine among public inbreds of maize. Plant Physiol. 91: 1122-1125.
16. Carvalho, C. H. S., Bohorova, N., Bordallo, P. N., Abreu, L. L., Valicente, F. H., Bressan, W., and Paiva, E. 1997. Type II callus production and plant regeneration in tropical maize genotypes. Plant Cell Rep. 17: 73-76.
17. Castiglioni, P., Warner, D., Bensen, R. J., Anstrom, D. C., Harrison, J., Stoecker, M., Abad, M., Kumar, G., Salvador, S., D'Ordine, R., Navarro, S., Back, S., Fernandes, M., Targolli, J., Dasgupta, S., Bonin, C., Luethy, M. H., and Heard, J. E. 2008. Bacterial RNA chaperones confer abiotic stress tolerance in plants and improved grain yield in maize under water-limited conditions. Plant Physiol. 147: 446-455.
18. Castle, L. A., Wu, G., and McElroy, D. 2006. Agricultural input traits: past, present and future. Curr. Opin. Biotechnol. 17: 105-112.
19. Cattivelli, L., Rizza, F., Badeck, F.-W., Mazzucotelli, E., Mastrangelo, A. M., Francia, E., Mare, C., Tondelli, A., and Stanca, A. M. 2008. Drought tolerance improvement in crop plants: An integrated view from breeding to genomics. Field Crops Res. 105: 1-14.
20. Ceccarelli, S. 1987. Yield potential and drought tolerance of segregating populations of barley in contrasting environments. Euphytica 36: 265-273.
21. Century, K., Reuber, T. L., and Ratcliffe, O. J. 2008. Regulating the regulators: The future prospects for transcription-factor-based agricultural biotechnology products. Plant Physiol. 147: 20-29.
22. Chen, T. H. H., and Murata, N. 2002. Enhancement of tolerance of abiotic stress by metabolic engineering of betaines and other compatible solutes. Curr. Opin. Plant Biol. 5: 250-257.
23. Chen, Z., Zhang, H., Jablonowski, D., Zhou, X., Ren, X., Hong, X., Schaffrath, R., Zhu, J.-K., and Gong, Z. 2006. Mutation in ABO1/ELO2, a subunit of Holo-Elongator, increase abscisic acid sensitivity and drought tolerance in Arabidopsis thaliana. Mol. Cell. Biol. 26: 6902-6912.
24. Chen, Z. J., and Tian, L. 2007. Roles of dynamic and reversible histone acety-lation in plant development and polyploidy. Biochim. Biophys. Acta 1769: 295-307.
25. Cheng, M., Lowe, B. A., Spencer, T. M., Ye, X., and Armstrong, C. L. 2004. Factors influencing Agrobacterium-mediated transformation of monocotyle-donous species. In Vitro Cell. Dev. Biol.-Plant 40: 31-45.
26. Chimenti, C. A., Marcantonio, M., and Hall, A. J. 2006. Divergent selection for osmotic adjustment results in improved drought tolerance in maize (Zea mays L.) in both early growth and flowering phases. Field Crops Res. 95: 305-315.
27. Collard, B. C. Y, and Mackill, D. J. 2008. Marker-assisted selection: an approach for precision plant breeding in the twenty-first century. Phil. Trans. R. Soc. B 363: 557-572.
28. Dafny-Yelin M., and Tzfira, T. 2007. Delivery of multiple transgenes to plant cells. Plant Physiol. 145: 1118-1128.
29. De Block, M., Verduyn, C., De Brouwer, D., and Cornelissen, M. 2005. Poly(ADP-ribose) polymerase in plants affects energy homeostasis, cell death and stress tolerance. Plant J. 41: 95-106.
30. Deng, W. W., Liu, C. Y., Pei, Y. X., Deng, X., Niu, L. F., and Cao, X. F. 2007. Involvement of the histone acetyltransferase AtHAC1 in the regulation of flowering time via repression of FLOWERING LOCUS C in Arabidopsis. Plant Physiol. 143: 1660-1668.
31. Dobrota, C. 2006. Energy dependent plant stress acclimation. Rev. Environ. Sci. iotechnol. 5: 243-251.
32. Duvick, D. N. 2001. Biotechnology in the 1930s: the development of hybrid aize. Nat. Rev. Genet. 2: 69-74.
33. Evenson, R. E., and Gollin, D. 2003. Assessing the impact of the Green Revolution, 1960 to 2000. Science 300: 758-762.
34. Falcone, A., Nelissen, H., Fleury, D., Van Lijsebettens, M., and Bitonti, M. B. 2007. Cytological investigations of the Arabidopsis thaliana elo1 mutant give new insights into leaf lateral growth and Elongator function. Ann. Bot. 100: 261-270.
35. FAO 1997. White Maize: a Traditional Food Grain in Developing Countries. Rome, Food and Agriculture Organization of the United Nations (www.fao.org/docrep/w2698e/w2698e00.htm).
36. Fernandes, J, Morrow, D J, Casati, P, and Walbot, V 2008 Distinctive tran-scriptome responses to adverse environmental conditions in Zea mays L. Plant Biotechnol. J. 6: 782-798.
37. Floss, D. S., Schliemann, W., Schmidt, J., Strack, D., and Walter, M. H. 2008. RNAinterference-mediated repression of MtCCD1 in mycorrhizal roots of Medicago truncatula causes accumulation of C27 apocarotenoids shedding light on the functional role of CCD1. Plant Physiol. 148: 1267-1282.
38. Foyer, C. H., and Noctor, G. 2005. Redox homeostasis and antioxidant signaling: a metabolic interface between stress perception and physiological responses. Plant Cell 17: 1866-1875.
39. Frame, B. R., McMurray, J. M., Fonger, T. M., Main, M. L., Taylor, K. W., Torney, F. J., Paz, M. M., and Wang, K. 2006. Improved Agrobacterium-mediated transformation of three maize inbred lines using MS salts. Plant Cell Rep. 25: 1024-1034.
40. Frame, B. R., Shou, H., Chikwamba, R. K., Zhang, Z., Xiang, C., Fonger, T. M., Pegg, S. E. K., Li, B., Nettleton, D. S., Pei, D., and Wang, K. 2002. Agrobacterium tumefaciens-mediated transformation ofmaize embryos using a standard binary vector system. Plant Physiol. 129: 13-22.
41. Frizzi, A., Huang, S., Gilbertson, L. A., Armstrong, T. A., Luethy, M. H., and Malvar, T. M. 2008. Modifying lysine biosynthesis and catabolism in corn with a single bifunctional expression/silencing transgene cassette. Plant Biotechnol. J. 6: 13-21.
42. Furihata, T., Maruyama, K., Fujita, Y., Umezawa, T., Yoshida, R., Shinozaki, K., and Yamaguchi-Shinozaki, K. 2006. Abscisic acid-dependent multisite phosphorylation regulates the activity of a transcription activator AREB1. Proc. Natl. Acad. Sci. USA 103: 1988-1993.
43. Furtado, A., Henry, R. J., and Takaiwa, F. 2008. Comparison of promoters in transgenic rice. Plant Biotechnol. J. 6: 679-693.
44. Fyodorov, D. V., and Kadonaga, J. T. 2001. The many faces of chro-matin remodeling: SWItching beyond transcription. Cell 106: 523-525.
45. Garg, A. K., Kim, J.-K., Owens, T. G., Ranwala, A. P., Choi, Y. D., Kochian, L. V., and Wu, R. J. 2002. Trehalose accumulation in rice plants confers high tolerance levels to different abiotic stresses. Proc. Natl. Acad. Sci. USA 99: 15898-15903.
46. Glaubitz, J., Vigouroux, Y., Yoshihiro, M., Major, G., Sanchez, J. G., and Doe-bley, J. 2008. Population structure and genetic diversity of New World maize landraces assessed by microsatellites. Abstract presented at the 50th Annual Maize Genetics Conference, Washington, D.C., February 27-March 1, 2008 (#P162, p. 121).
47. Granier, C., Inzé, D., and Tardieu, F. 2000. Spatial distribution of cell division rate can be deduced from that of p34cdc2 kinase activity in maize leaves grown at contrasting temperatures and soil water conditions. Plant Physiol. 124: 1393-1402.
48. Gressel, J., Hanafi, A., Head, G., Marasas, W., Obilana, A. B., Ochanda, J., Souissi, T., and Tzotzos, G. 2004. Major heretofore intractable biotic constraints to African food security that may be amenable to novel biotechno-logical solutions. Crop Protect. 23: 661-689.
49. Guo, L., Zhou, J., Elling, A. A., Charron, J.-B. F., and Deng, X. W. 2008. Histone modifications and expression of light-regulated genes in Arabidopsis are cooperatively influenced by changing light conditions. Plant Physiol. 147: 2070-2083.
50. Gutterson, N., and Zhang. J. Z. 2004. Genomics applications to biotech traits: a revolution in progress? Curr. Opin. Plant Biol. 7: 226-230.
51. Hakmé, A., Wong, H.-K., Dantzer, F., and Schreiber, V. 2008. The expanding field of poly(ADP-ribosy)lation. EMBO Rep. 9: 1094-1100.
52. Hamilton, C. M., Frary, A., Lewis, C., and Tanksley, S. D. 1996. Stable transfer of intact high molecular weight DNA into plant chromosomes. Proc. Natl. Acad. Sci. USA 93: 9975-9979.
53. Hasegawa, P. M., Bressan, R. A., Zhu, J.-K., and Bohnert, H. J. 2000. Plant cellular and molecular responses to high salinity. Annu. Rev. Plant Physiol. Plant Mol. Biol. 51: 463-499.
54. Hayano Kanashiro, C. A., Calderon Vazquez, C., Ibarra Laclette, E., Herrera Estrella, L., and Simpson Williamson, J. 2008. Gene expression analysis and physiological responses of Mexican maize landraces under drought stress. Abstract presented at the 50th Annual Maize Genetics Conference, Washington, D.C., February 27-March 1, 2008 (#P149, p. 115).
55. Ichimura, K., Mizoguchi, T., Yoshida, R., Yuasa, T., and Shinozaki, K. 2000. Various abiotic stresses rapidly activate Arabidopsis MAP kinases ATMPK4 and ATMPK6. Plant J. 24: 655-665.
56. Ishida, Y., Saito, H., Ohta, S., Hiei, Y., Komari, T., and Kumashiro, T. 1996. High efficiency transformation of maize (Zea mays L.) mediated by Agrobacterium tumefaciens. Nat. Biotechnol. 14: 745-750.
57. James, C. 2007. Global status of commercialized biotech/GM crops: 2007 (ISAAA Brief No. 37). Ithaca, NY, International Service for the Acquisition of Agri-Biotech Applications (htpp://www.isaaa.org/resources/ publications/briefs/37/executivesymmary/default.htm).
58. Jonak, C., Ökrész, L., Bögre, L., and Hirt, H. K. 2002. Complexity, cross talk and integration of plant MAP kinase signalling. Curr. Opin. Plant Biol. 5: 415-424.
59. Kadota, Y., Watanabe, T., Fujii, S., Maeda, Y., Ohno, R., Higashi, K., Sano, T., Muto, S., Hasezawa, S., and Kuchitsu, K. 2005. Cell cycle dependence of elicitor-induced signal transduction in tobacco BY-2 cells. Plant Cell Physiol. 46: 156-165.
60. Kandianis, C. B., Yan, J., Stevens, R., Fu, Y., Palacios, N., Warburton, M., Li, J., Pixley, K., and Rocheford, T. 2008. Genetic control of provitamin A synthesis, modification and degradation in maize grain. Abstract presented at the 50th Annual Maize Genetics Conference, Washington, D.C., February 27-March 1, 2008 (#P17, p. 50).
61. Kant, P., Gordon, M., Kant, S., Zolla, G., Davydov, O., Heimer, Y. M., Chalifa-Caspi, V., Shaked, R., and Barak, S. 2008. Functional-genomics-based identification of genes that regulate Arabidopsis responses to multiple abiotic stresses. Plant Cell Environ. 31: 697-714.
62. Karaba, A., Dixit, S., Greco, R., Aharoni, A., Trijatmiko, K. R., Marsch-Martinez, N., Krishnan, A., Nataraja, K. N., Udayakumar, M., and Pereira, A. 2007. Improvement of water use efficiency in rice by expression of HARDY, an Arabidopsis drought and salt tolerance gene. Proc. Natl. Acad. Sci. USA 104: 15270-15275.
63. Kebeish, R., Niessen, M., Thiruveedhi, K., Bari, R., Hirsch, H.-J., Rozenkranz, R., Stabler, N., Schonfeld, B., Kreuzaler, F., and Peterhansel, C. 2007. Chloro-plastic photorespiratory bypass increases photosynthesis and biomass production in Arabidopsis thaliana. Nat. Biotechnol. 25: 593-599.
64. Khraiwesh, B., Ossowski, S., Weigel, D., Reski, R., and Frank, W. 2008. Specific gene silencing by artificial microRNAs in Physcomitrella patens: An alternative to targeted gene knockouts. Plant Physiol. 148: 684-693.
65. Kim, M.-J., Lim, G.-H., Kim, E.-S., Ko, C.-B., Yang, K.-Y., Jeong, J.-A., Lee, M.-C., and Kim, C. S. 2007. Abiotic and biotic stress tolerance in Arabidopsis overexpressing the Multiprotein bridging factor 1a (MBF1a) transcriptional coactivator gene. Biochem. Biophys. Res. Commun. 354: 440-446.
66. 1-pyrroline-5-carboxylate synthetase increases proline production and confers osmotolerance in transgenic plants. Plant Physiol. 108: 1387-1394.
67. Kiula, B. A., Lyimo, N. G., and Botha, A.-M. 2008. Association between AFLP-based genetic distances and hybrid performance in tropical maize. Plant Breed. 127: 140-144.
68. Kohli, A., Gahakwa, D., Vain, P., Lawrie, D. A., and Christou, P. 1999. Trans-gene expression in rice engineered through particle bombardment: Molecular factors controlling stable expression and transgene silencing. Planta 208: 88-97.
69. Kononov, M. E., Bassuner, B., and Gelvin, S. B. 1997. Integration of T-DNA binary vector "backbone"sequences into the tobacco genome: evidence for multiple complex patterns of integration. Plant J. 11: 945-957.
70. Koornneef, M., Léon-Kloosterziel, K. M., Schwartz, S. H., and Zeevaart, J. A. D. 1998. The genetic and molecular dissection of abscisic acid biosynthesis and signal transduction in Arabidopsis. Plant Physiol. Biochem.36: 83-89.
71. Lauter, N., Kampani, A., Carlson, S., Goebel, M., and Moose, S. P. 2005. microRNA172 down-regulates glossy15 to promote vegetative phase change in maize. Proc. Natl. Acad. Sci. USA 102: 9412-9417.
72. Lawlor, D. W. 2002. Limitations to photosynthesis in water-stressed leaves: stomata vs. metabolism and the role of ATP. Ann. Bot. 89: 871-885.
73. Li, W.-X., Oono, Y., Zhu, J., He, X.-J., Wu, J.-M., Iida, K., Lu, X.-Y., Cui, X., Jin, H., and Zhu, J.-K. 2008. The Arabidopsis NFYA5 transcription factor is regulated transcriptionally and posttranscriptionally to promote drought resistance. Plant Cell 20: 2238-2251.
74. Lupotto, E., Conti, E., Reali, A., Lanzanova, C., Baldoni, E., and Alle-gri, L. 2004. Improving in vitro culture and regeneration conditions for Agrobacterium-mediated maize transformation. Maydica 49: 21-29.
75. Madlung, A., and Comai, L. 2004. The effect of stress on genome regulation and structure. Ann. Bot. 94: 481-495.
76. Mantovani, R. 1999. The molecular biology of the CCAAT-binding factor NF-Y. Gene 239: 15-27.
77. Martinez de la Vega, O., Vega-Arrenguan, J., Hernandez-Guzman, G., Ibarra-Laclette, E., Jimenez-Moraila, B., Corona-Armenta, G., Alvarez-Mejia, C., Fernandez-Cortes, A., de la Riva, G., Herrera-Estrella, A., Vielle-Calzada, J.-P., and Herrera-Estrella, L. 2008. The codifying genome of the Palomero Toluqueno Mexican landraces. Abstract presented at the 50th Annual Maize Genetics Conference, Washington, D.C., February 27-March 1, 2008 (#T38, p. 38).
78. McCann, J.C. 2005. Maize and Grace: Africa's Encounter with a New World Crop 1500-2000. Cambridge, MA, Harvard University Press.
79. Medrano, H., Escalona, J. M., Bota, J., Gullas, J., and Flexas, J. 2002. Regulation of photosynthesis of C3 plants in response to progressive drought: stomatal conductance as a reference parameter. Ann. Bot. 89: 895-905.
80. Mittler, R., Vanderauwera, S., Gollery, M., and Van Breusegem, F. 2004. The reactive oxygen gene network in plants. Trends Plant Sci. 9: 490-498.
81. Mlynárová, L., Nap, J.-P., and Bisseling, T. 2007. The SWI/SNF chromatin-remodeling gene AtCHR12 mediates temporary growth arrest in Arabidopsis thaliana upon perceiving environmental stress. Plant J. 51: 874-885.
82. Moose, S. P., and Mumm, R. H. 2008. Molecular plant breeding as the foundation for 21st century crop improvement. Plant Physiol. 147: 969-977.
83. Mustilli, A.-C., Merlot, S., Vavasseur, A., Fenzi, F., and Giraudat, J. 2002. Arabidopsis OST1 protein kinase mediates the regulation of stomatal aperture by abscisic acid and acts upstream of reactive oxygen species production. Plant Cell 14: 3089-3099.
84. Nakagami, H., Kiegerl, S., and Hirt, H. 2004. OMTK1, a novel MAPKKK, channels oxidative stress signaling through direct MAPK interaction. J. Biol. Chem. 279: 26959-26966.
85. Nakashima, K., Kiyosue, T., Yamaguchi-Shinozaki, K., andShinozaki, K. 1997. A nuclear gene, erdl, encoding a chloroplast-targeted Clp protease regulatory subunit homolog is not only induced by water stress but also developmentally up-regulated during senescence in Arabidopsis thaliana. Plant J. 12: 851-861.
86. Nelissen, H., Boccardi, T. M., Himanen, K., and Van Lijsebettens, M. 2007. Impact of core histone modifications on transcriptional regulation and plant growth. Crit. Rev. Plant Sci. 26: 243-263.
87. Nelissen, H., Fleury, D., Bruno, L., Robles, P., De Veylder, L., Traas, J., Micol, J. L., Van Montagu, M., Inze, D., and Van Lijsebettens, M. 2005. The elongata mutants identify a functional Elongator complex in plants with a role in cell proliferation during organ growth. Proc. Natl. Acad. Sci. USA 102: 7754-7759.
88. Nelson, D. E., Repetti, P. P., Adams, T. R., Creelman, R. A., Wu, J., Warner, D. C., Anstrom, D. C., Bensen, R. J., Castiglioni, P. P., Donnarummo, M. G., Hinchey, B. S., Kumimoto, R. W., Maszle, D. R., Canales, R. D., Krolikowski, K. A., Dotson, S. B., Gutterson, N., Ratcliffe, O. J., and Heard, J. E. 2007. Plant nuclear factor Y (NF-Y) B subunits confer drought tolerance and lead to improved corn yields on water-limited acres. Proc. Natl. Acad. Sci. USA 104:16450-16455.
89. Niu, Q.-W., Lin, S.-S., Reyes, J. L., Chen, K.-C., Wu, H.-W., Yeh, S.-D., and Chua, N.-H. 2006. Expression of artificial microRNAs in transgenic Ara-bidopsis thaliana confers virus resistance. Nat. Biotechnol. 24: 1420-1428 [Err. Nat. Biotechnol. 25: 254].
90. O'Connor-Sánchez, A., Cabrera-Ponce, J. L., Valdez-Melara, M., Tellez-Rodriguez, P., Pons-Henmndez, J. L., and Herrera-Estrella, L. 2002. Trans-genic maize plants of tropical and subtropical genotypes obtained from calluses containing organogenic and embryogenic-like structures derived from shoottips. Plant Cell Rep. 21: 302-312.
91. O'Kennedy, M. M., Burger, J. T., and Berger, D. K. 2001. Transformation of elite white maize using the particle inflow gun and detailed analysis of a low-copy integration event. Plant Cell Rep. 20: 721-730.
92. Oduor, R. O., Njagi, E. N. M., Ndung'u, S., and Machuka, J. S. 2006. In vitro regeneration of dryland Kenyan maize genotypes through somatic embryo-genesis. Int. J. Bot. 2: 146-151.
93. Offermann, S., Danker, T., Dreymuller, D., Kalamajka, R., Topsch, S., Weyand, K., and Peterhansel, C. 2006. Illumination is necessary and sufficient to induce histone acetylation independent of transcriptional activity at the C4-specific phosphoenolpyruvate carboxylase promoter in maize. Plant Physiol. 141: 1078-1088.
94. Oliveira, K. M., Laborda, P. R., Garcia, A. A. F., Zagatto Paterniani, M. E. A. G., and Pereira de Souza, A. 2004. Evaluating genetic relationships between tropical maize inbred lines by means of AFLP profiling. Hereditas 140: 24-33.
95. Ombori, O., Gitonga, N. M., and Machuka, J. 2008. Somatic embryogenesis and plant regeneration from immature embryos of tropical maize (Zea mays L.) inbred lines. Biotechnology 7: 224-232.
96. Papadakis, A. K., and Roubelakis-Angelakis, K. A. 2005. Polyamines inhibit NADPH oxidase-mediated superoxide generation and putrescine prevents programmed cell death induced by polyamine oxidase-generated hydrogen peroxide. Planta 220: 826-837.
97. Papageorgiou, G. C., and Murata, N. 1995. The unusually strong stabilizing effects ofglycine betaine on the structure and function ofthe oxygen-evolving Photosystem II complex. Photosynth. Res. 44: 243-252.
98. Parry, M. A. J., Andralojc, P. J., Khan, S., Lea, P. J., and Keys, A. J. 2002. Rubisco activity: Effects of drought stress. Ann. Bot. 89: 833-839.
99. Peres, A., Churchman, M. L., Hariharan, S., Himanen, K., Verkest, A., Van-depoele, K., Magyar, Z., Hatzfeld, Y., Van Der Schueren, E., Beemster, G. T. S., Frankard, V., Larkin, J. C., Inze, D., and De Veylder, L. 2007. Novel plant-specific cyclin-dependent kinase inhibitors induced by biotic and abiotic stresses. J. Biol. Chem. 282: 25588-25596.
100. Petermann, E., Ziegler, M., and Oei, S. L. 2003. ATP-dependent selection between single nucleotide and long patch base excision repair. DNA Repair 2: 1101-1114.
101. Pilon-Smits, E. A. H., Ebskamp, M. J. M., Paul, M. J., Jeuken, M. J. W., Weisbeek, P. J., and Smeekens, S. C. M. 1995. Improved performance of transgenic fructan-accumulating tobacco under drought stress. Plant Physiol. 107: 125-130.
102. Potters, G., Pasternak, T. P., Guisez, Y., Palme, K. J., and Jansen, M. A. K. 2007. Stress-induced morphogenic responses: growing out of trouble? Trends Plant Sci. 12: 98-105.
103. Prioli, L. M., and da Silva, W. J. 1989. Somatic embryogenesis and plant regeneration capacity in tropical maize inbreds. Rev. Bras. Genet. 12: 553-566.
104. Qin, F., Kakimoto, M., Sakuma, Y., Maruyama, K., Osakabe, Y., Tran, L.-S. P., Shinozaki, K., and Yamaguchi-Shinozaki, K. 2007. Regulation and functional analysis of ZmDREB2A in response to drought and heat stresses in Zea mays L. Plant J. 50: 54-69.
105. Quan, R., Shang, M., Zhang, H., Zhao, Y., and Zhang, J. 2004. Engineering of enhanced glycine betaine synthesis improves drought tolerance in maize. Plant Biotechnol. J. 2: 477-486.
106. Rascóon-Cruz, Q., Sinagawa-García, S., Osuna-Castro, J. A., Bohorova, N., and Paredes-López, O. 2004. Accumulation, assembly, and digestibility of ama-rantin expressed in transgenic tropical maize. Theor. Appl. Genet. 108: 335-342.
107. Rentel, M. C., and Knight. M. R. 2004. Oxidative stress-induced calcium signaling in Arabidopsis. Plant Physiol. 135: 1471-1479.
108. Reyes, J. C., Hennig, L., and Gruissem, W. 2002. Chromatin-remodeling and memory factors. New regulators of plant development. Plant Physiol. 130: 1090-1101.
109. Rhoades, F. M., and Bennett, J. M. 1990. Corn. In: Irrigation of Agricultural Crops (Agronomy Monograph No. 30), B. A. Stewart, and D. R. Nielsen (Eds.). Madison, WI, American Society of Agronomy, pp. 569-597.
110. Rizhsky, L., Liang, H., and Mittler, R. 2002. The combined effect of drought stress and heat shock on gene expression in tobacco. Plant Physiol. 130: 1143-1151.
111. Sakamoto, A., and Murata, N. 2002. The role of glycine betaine in the protection of plants from stress: clues from transgenic plants. Plant Cell Environ. 25: 163-171.
112. Salmeron, J., and Herrera-Estrella. L. R. 2006. Fast-forward genomics for improved crop production. Curr. Opin. Plant Biol. 9: 177-179.
113. Schubert, C. 2006. Can biofuels finally take center stage? Nat. Biotechnol. 24: 777-784.
114. Schwab, R., Ossowski, S., Riester, M., Warthmann, N., and Weigel, D. 2006. Highly specific gene silencing by artificial microRNAs in Arabidopsis. Plant Cell 18: 1121-1133.
115. Sheveleva, E., Chmara, W., Bohnert, H. J., and Jensen, R. G. 1997. Increased salt and drought tolerance by D-ononitol production in transgenic Nicotiana tabacum L. Plant Physiol. 115: 1211-1219.
116. Shinozaki, K., and Yamaguchi-Shinozaki, K. 2007. Gene networks involved in drought stress response and tolerance. J. Exp. Bot. 58: 221-227.
117. Shinozaki, K., Yamaguchi-Shinozaki, K., and Seki, M. 2003. Regulatory network of gene expression in the drought and cold stress responses. Curr. Opin. Plant Biol. 6: 410-417.
118. Shou, H., Bordallo, P., and Wang, K. 2004. Expression ofthe Nicotianaprotein kinase (NPK1) enhanced drought tolerance in transgenic maize. J. Exp. Bot. 55: 1013-1019.
119. Shrawat, A. K., and Lorz, H. 2006. Agrobacterium-mediated transformation of cereals: a promising approach crossing barriers. Plant Biotechnol. J. 4: 575-603.
120. Shulaev, V., Cortes, D., Miller, G., and Mittler, R. 2008. Metabolomics for plant stress response. Physiol. Plant. 132: 199-208.
121. Sibov, S. T., Lopes de Souza Jr, C., Garcia, A. A. F., Silva, A. R., Garcia, A. F., Mangolin, C. A., Benchimol, L. L., and Pereirade Souza, A. 2003. Molecular mapping in tropical maize (Zea mays L.) using microsatellite markers. 2. Quantitative trait loci (QTL) for grain yield, plant height, ear height and grain moisture. Hereditas 139: 107-115.
122. Slade, A. J., Fuerstenberg, S. I., Loeffler, D., Steine, M. N., and Facciotti, D. 2005. A reverse genetic, nontransgenic approach to wheat crop improvement by TILLING. Nat. Biotechnol. 23: 75-81.
123. Sokol, A., Kwiatkowska, A., Jerzmanowski, A., and Prymakowska-Bosak, M. 2007. Up-regulation of stress-inducible genes in tobacco and Arabidopsis cells in response to abiotic stresses and ABA treatment correlates with dynamic changes in histone H3 and H4 modifications. Planta 227: 245-254.
124. Sreenivasulu, N., Sopory, S. K., and Kavi Kishor, P. B. 2007. Deciphering the regulatory mechanisms of abiotic stress tolerance in plants by genomic approaches. Gene 388: 1-13.
125. Sridha, S., and Wu, K. 2006. Identification of AtHD2C as a novel regulator of abscisic acid responses in Arabidopsis. Plant J. 46: 124-133.
126. Sung, S., and Amasino, R. M. 2004. Vernalization and epigenetics: how plants remember winter. Curr. Opin. Plant Biol. 7: 4-10.
127. Sunkar, R., Chinnusamy, V., Zhu, J., and Zhu, J.-K. 2007. Small RNAs as big players in plant abiotic stress responses and nutrient deprivation. Trends Plant Sci. 12: 301-309.
128. Taji, T., Ohsumi, C., Iuchi, S., Seki, M., Kasuga, M., Kobayashi, M., Yamaguchi-Shinozaki, K., and Shinozaki, K. 2002. Important roles ofdrought- and cold-inducible genes for galactinol synthase in stress tolerance in Arabidopsis thaliana. Plant J. 29: 417-426.
129. Taji, T., Seki, M., Satou, M., Sakurai, T., Kobayashi, M., Ishiyama, K., Narusaka, Y., Narusaka, M., Zhu, J.-K., and Shinozaki, K. 2004. Comparative ge-nomics in salt tolerance between Arabidopsis and Arabidopsis-related halo-phyte salt cress using Arabidopsis microarray. Plant Physiol. 135: 1697-1709.
130. Tarczynski, M. C., Jensen, R. G., and Bohnert, H. J. 1993. Stress protection of transgenic tobacco by production of the osmolyte mannitol. Science 259: 508-510.
131. Tester, M., and Bacic, A. 2005. Abiotic stress tolerance in grasses. From model plants to crop plants. Plant Physiol. 137: 791-793.
132. Timmermans, M. C. P., Brutnell, T. P., and Becraft, P. W. 2004. The 46th Annual Maize Genetics Conference. Unlocking the secrets of the maize genome. Plant Physiol. 136: 2633-2640.
133. Tiwari, B. S., Belenghi, B., and Levine, A. 2002. Oxidative stress increased respiration and generation of reactive oxygen species, resulting in ATP depletion, opening of mitochondrial permeability transition, and programmed cell death. Plant Physiol. 128: 1271-1281.
134. Tran, L.-S. P., Nakashima, K., Sakuma, Y., Simpson, S. D., Fujita, Y., Maruyama, K., Fujita, M., Seki, M., Shinozaki, K., and Yamaguchi-Shinozaki, K. 2004. Isolation and functional analysis of Arabidopsis stress-inducible NAC transcription factors that bind to a drought-responsive cis-element in the early responsive to dehydration stress 1 promoter. Plant Cell 16: 2481-2498.
135. Tsuji, H., Saika, H., Tsutsumi, N., Hirai, A., and Nakazono, M. 2006. Dynamic and reversible changes in histone H3-Lys4 methylation and H3 acetylation occurring at submergence-inducible genes in rice. Plant Cell Physiol. 4: 995-1003.
136. Tyler, J. K. 2002. Chromatin assembly. Cooperation between histone chaperones and ATP-dependent nucleosome remodeling machines. Eur. J. Biochem. 269: 2268-2274.
137. Umezawa, T., Fujita, M., Fujita, Y., Yamaguchi-Shinozaki, K., and Shinozaki, K. 2006. Engineering drought tolerance in plants: discovering and tailoring genes to unlock the future. Curr. Opin. Biotechnol. 17: 113-122.
138. Valdez-Ortiz, A., Medina-Godoy, S., Valverde, M. E., and Paredes-López, O. 2007. A transgenic tropical maize line generated by the direct transformation of the embryo-scutellum by A. tumefaciens. Plant Cell Tissue Organ Cult. 91: 201-214.
139. Valliyodan, B., and Nguyen, H. T. 2006. Understanding regulatory networks and engineering for enhanced drought tolerance in plants. Curr. Opin. Plant Biol. 9: 189-195.
140. Van Breusegem, F., and Dat, J. F. 2006. Reactive oxygen species in plant cell death. Plant Physiol. 141: 384-390.
141. Vanderauwera, S., De Block, M., Van de Steene, N., van de Cotte, B., Metzlaff, M., and Van Breusegem, F. 2007. Silencing ofpoly(ADP-ribose) polymerase in plants alters abiotic stress signal transduction. Proc. Natl. Acad. Sci. USA 104:15150-15155.
142. Vasal, S. K., Dhillon, B. S., and Pandey, S. 1997. Recurrent selection methods based on evaluation-cum-recombination block. Plant Breed. Rev. 14: 139-163.
143. Vasil, I. K. 2007. Molecular genetic improvement of cereals: trans-genic wheat (Triticum aestivum L.). Plant Cell Rep. 26: 1133-1154.
144. Verslues, P. E., Agarwal, M., Katiyar-Agarwal, S., Zhu, J., and Zhu, J.-K. 2006. Methods and concepts in quantifying resistance to drought, salt and freezing, abiotic stresses that affect plant water status. Plant J. 45: 523-539.
145. Vij, S., and Tyagi, A. K. 2007. Emerging trends in the functional genomics of the abiotic stress response in crop plants. Plant Biotechnol. J. 5: 361-380.
146. Vinocur, B., and Altman, A. 2005. Recent advances in engineering plant tolerance to abiotic stress: achievements and limitations. Curr. Opin. Biotechnol. 16: 123-132.
147. Wang, W., Vinocur, B., and Altman, A. 2003. Plant responses to drought, salinity and extreme temperatures: towards genetic engineering for stress tolerance. Planta 218: 1-14.
148. Warburton, M. L., Ribaut, J. M., Franco, J., Crossa, J., Dubreuil, P., and Betrán, F. J. 2005. Genetic characterization of 218 elite CIM- MYT maize inbred lines using RFLP markers. Euphytica 142: 97-106.
149. Warthmann, N., Chen, H., Ossowski, S., Weigel, D., and Hervé, P. 2008. Highly specific gene silencing by artificial miRNAs in rice. PLoS ONE 3: e1829.
150. Wasilewska, A., Vlad, F., Sirichandra, C., Redkob, Y., Jammes, F., Valon, C., Frei dit Frey, N., and Leung, J. 2008. An update on abscisic acid signaling in plants and more . Mol. Plant 1: 198-217.
151. West, G., Inzé, D., and Beemster, G. T. S. 2004. Cell cycle modulation in the response ofthe primary root ofArabidopsis to salt stress. Plant Physiol. 135: 1050-1058.
152. Yacobucci, B. D., and Schnepf, R. 2007. Ethanol and biofuels: Agriculture, infrastructure, and market constraints related to expanded production. Congressional Research Service Report for Congress (RL33928) (htpp://www.energybulletin.net/node/27576).
153. Yamaguchi-Shinozaki, K., and Shinozaki. K. 2006. Transcriptional regulatory networks in cellular responses and tolerance to dehydration and cold stresses. Annu. Rev. Plant Biol. 57: 781-803
154. Yamaguchi-Shinozaki, K., and Shinozaki, K. 2005. Organization of cis-acting regulatory elements in osmotic- and cold-stress-responsive promoters. Trends Plant Sci. 10: 88-94.
155. Zhang, A., Jiang, M., Zhang, J., Tan, M., and Hu, X. 2006. Mitogen-activated protein kinase is involved in abscisic acid-induced antioxidant defense and acts downstream of reactive oxygen species production in leaves of maize plants. Plant Physiol. 141: 475-487.
156. Zhang, X. 2008. The epigenetic landscape of plants. Science 320: 489-492 [Err. Science 321: 200].
157. Zhao, Z. Y., Gu, W., Cai, T., Tagliani, L. A., Hondred, D., Bond, D., Krell, S., Rudert, M. L., Bruce, W. B., and Pierce, D. A. 1998. Molecular analysis of T0 plants transformed by Agrobacterium and comparison of Agrobacterium-mediated transformation with bombardment transformation in maize. Maize Genet. Coop. Newslett. 72: 34-37.
158. Zhuang, Y., Ren, G., Yue, G., Li, Z., Qu, X., Hou, G., Zhu, Y., and Zhang, J. 2007. Effects of water-deficit stress on the transcriptomes of developing immature ear and tassel in maize. Plant Cell Rep. 26, 2137-2147.