Abstract:
Mung bean, member of Fabaceae is grown in most tropical and sub-tropical regions of
world and have significant role in nutrition in developing countries. Irrigation and water
resources are the most critical constrain in most tropics and sub-tropics thus our study aimed
to investigate resistance of widely cultivated mung bean genotypes of Sri Lanka ARI, MI
-5and MI-6 for its morpho-physiological responses to drought stress during vegetative and
reproductive growth stages. A greenhouse pot experiment was carried out under randomized
complete block design with five replications and relative water content of leaves, soil moisture
content, plant dry matter, leaf area and grain yield and yield components were measured.
Results showed that there was no significant difference between control and drought stress
during reproductive growth stage on yield and yield components, but drought stress during
vegetative growth stage decreased yield and yield components significantly.The genotype
and growth stage both had a significant effect on leaf area and plant dry weight at vegetative
stage. However, results obtained showed that difference between each three treatments on
relative water content (RWC) and soil moisture content (SMC) was significant.
