Abstract

                                Overall the multiple resistant genotypes recorded higher amount of sugars, phenols, O-dihydroxy phenols, proteins and amino acids as compared to genotypes susceptible to sooty stripe, zonate leaf spot, anthracnose and rust diseases. The amount of total sugars decreased significantly with the age of the plants whereas, amount of phenols and O-dihydroxy phenols increased significantly. However, uniform trend was not observed for soluble proteins and amino acid content did not vary with stage of the crop growth. The study revealed that higher sugars, phenols, O-dihydroxy phenols, soluble proteins and amino acids are some of the possible reasons for multiple resistance to foliar diseases in sorghum.

Key words : Sorghum, Biochemical, Disease, Resistance