Response of Lablab purpureus (Hyacinth bean) cultivars to drought stress

Unpredictable rain patterns have forced farmers to cultivate drought resistant crops in primarily rainsfed areas. Dolichos lablab (Lablab purpureus L. sweet) a drought resistant plant, has several genotypes which are cultivated in different regions. Five extensively cultivated genotypes were subjected to drought stress and evaluated for their performance under drought stress. The effect was monitored in 10 day old seedlings over eight days under green house conditions. Stress indicators H2O2, lipid peroxidation, antioxidants like GSH, proline, ascorbic acid, and antioxidant enzymes such guaiacol peroxidase, catalase and glutathione reductase, metabolic enzymes like acid phosphatase and amylase were monitored. While some parameters showed similar trend in all five cultivars, others varied. Two cultivars, GL43 and HA4 showed elevation in glutathione reductase, guaiacol peroxidase and diminished catalase activity. An elevated level of amylase activity was observed in DL28, acid phosphatase showed increase in activity under stress. The results suggested that HA4 and GL43 as most resistant cultivars to drought.

Author(s): Kokila S, Myrene R D’souza and Varadahalli R Devaraj*

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