Abstract
One of the most important tolerance mechanisms to drought stress in plants is drought escape. Therefore, in order to assess responses of soybean cultivars differential maturity periods of soybean to drought stress, a experiment was conducted in field at Research Station of Islamic Azad University, Kermanshah province, Iran. At the end of growth season, ten plants were selected randomly from each plot then their yield and yield components were measured. Results showed that soybean yield at water stress are dependent largely to maturity group. Also, all of the evaluated traits were reduced remarkably by drought stress. Regular irrigation had significantly increased soybean production in both early and late maturity groups. In this study, late maturity group is the most sensitive to water stress compared to early maturity group.
