Indices of oxidative stress in cotton (Gossypium hirsutum L.) genotypes after infestation of sucking pest

Abstract

Cotton is a crop of great economic importance in India. In the present study, H2O2 content, MDA content and LOX activity were estimated in the leaves (2nd & 6th) of cotton genotypes infected by sucking pests at 50, 60 and 68 days after sowing (DAS). H2O2 content, MDA content and LOX activity was found to be maximum in 2nd & 6th leaves of G. hirsutum susceptible genotypes followed by G. hirsutum resistant genotypes and minimum in G. arboreum genotypes. The leaves of resistant genotypes had less production of H2O2, MDA and LOX as compared to susceptible cotton genotypes.