INDUÇÃO DA TOLERÂNCIA À SECA EM PLANTAS DE SORGO PELO USO DE UM COMPOSTO QUÍMICO

Abstract

Sorghum is generally cultivated during the off-season in Brazil, which exposes crop to stress due to severe drought, capable of reducing its productive potential. Thus, the objective of this study is to develop a chemical compound to induce tolerance to drought and at the same time time, mitigate stress damage to the physiology and production of sorghum plants. At the stadium phenological 3 of the crop, the plants will be subjected to water deficit (50% of the water capacity soil field) and will receive the application of a chemical compound in three formulations, varying the concentrations of proline, glycine-betaine, potassium (K) and sodium nitroprusside (doctor of nitric oxide). After 4 days from the beginning of stress and application of the formulations, the biometric variables, water relations, characteristics of the photosynthetic process, and the osmotic adjustment of plants. It is expected as a result of this research, the establishment the formulation of a chemical compound that protects and stimulates plant metabolism, capable of to contribute to the satisfactory growth and grain production of sorghum plants cultivated under conditions of water deficiency.