Biochemical studies in Bt and non Bt cotton genotypes against foliar diseases

摘要

Biochemical studies were carried out on non Bt genotypes Laxmi, Abhadita, DCH 32 and Bt genotypes RCH 2 Bt, JKCH 1 Bt and JKCH 2 Bt. All the test genotypes were found susceptible to the foliar diseases. The results indicate that non-Bt genotypes recorded high amount of total protein (5.61 to 17.59%) as compared to Bt genotypes, but total phenol (0.87 to 35.92%), total sugar (2.80 to 21.54%) and reducing sugar (8.99 to 9.32%) recorded in lower amount compared to Bt genotypes. High amount of non-reducing sugar (13.18%) content at early stage (90 DAS) and low amount (27.04%) at later stage (120 DAS) were observed in non-Bt as compared to Bt genotypes. Further, there was decrease in total protein (23.41 to 25.38%), total phenol (30.84 to 33.37%), totalsugar (23.68 to 34.68%), reducing sugar (26.09 to 29.26%) and non-reducing sugar (27.99 to 41.44%) in infected leaves (grand mean of non Bt and Bt) as compared to healthy leaves for foliar diseases under study.