Déficit hídrico em plantas de soja provenientes de sementes de alto e baixo vigor

Abstract

In this study, we used the cultivar M-SOY 8008 RR, with two levels of seed vigor, high and low, submitted to drought until the initial 40DAE. We conducted two research studies aimed at better understanding the importance of using high quality seed physiological as well as evaluate the performance of the same when subjected to water stress until 40 days after emergence (DAE). The first experiment studied the importance of using high quality seed physiological as well as the behavior of plants from high and low force when subjected to water deficits in the vegetative stage until the 40DAE. The second sought to identify the physiological quality of seeds and water deficit in the vegetative stage would influence the yield and physiological quality of seeds produced. The results show that high quality seeds produce plants with higher performance up to 40 DAE, providing seed yield 20% higher than in plants grown from seeds of low vigor. Drought leads to reduced growth in plants from both high and low force, causing a reduction in physiological quality of seed produced from 20 DAE.