Effect of waterlogging and salinity on antioxidative system in pigeonpea plant leaves at different stages of development

摘要

Effect of waterlogging, salinity and combined stress on pigeonpea genotypes was studied in the present investigation. Four pigeonpea genotypes (ICPH-2431, PARAS, UPAS-120, HO 933) were raised in polythene bags filled with half kg soil+FYM manure mixture. Waterlogging, salinity and waterlogging+salinity treatments were given for 12 days and observations were recorded 1 and 8 days after removal from treatment in 20 and 40-day old plant leaves. A significant increase in superoxide radical and H202 content was observed with all the three treatments both 1 and 8 days after removal from treatment. However, increase was comparatively less 8-day after removal from salinity treatment. Among both the treatments, salinity alone was found least deleterious. Increase in antioxidative enzyme activity and antioxidative metabolite content was also observed with both the treatments. Maximum increase was observed in ICPH 2431 followed by PARAS, HO 933 and minimum was observed in UPAS 120.