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Corn is a crop of great economic importance in the Brazilian and world agriculture. The water\udsupply is important for their growth and development from that adopted in the proper amount to\udmeet the water needs of the plant. This study aimed to evaluate the physiological and biochemical\udresponse of a cultivar of transgenic corn and a hybrid subjected to different irrigation. The work\udwas conducted in greenhouse on campus Unoeste II, Presidente Prudente - SP. The experimental\uddesign was in randomized blocks in a double factorial design with five depth of irrigation (150, 100,\ud75, 50 and 25% crop evapotranspiration (ETc)), two cultivars (transgenic Agroceres 8088 and\udrobust 22 PEN (Selegrãos)) and 4 blocks. The depths of irrigation were determined according to\udthe daily readings evaporimeter tar adjusted by the crop coefficient (kc) of 1.2 for the corn crop.\udThe parameters evaluated were plant height, length and root volume, dry weight of shoot and\udroot, root / shoot ratio and shoot proline concentration in fresh leaves. Data were submitted to\udANOVA and then Tukey test to compare means between the probability level of 0.05. For the\udconditions of Oeste Paulista, is more feasible planting cultivar of PEN 22 Robust irrigation with\ud25% of crop evapotranspiration (ETc) for ensuring biomass accumulation in the vegetative stage.\u

AVALIAÇÕES MORFOFISIOLÓGICAS NA FASE VEGETATIVA DE MILHO IRRIGADO