Biochemical Characterization of Xanthomonas campestris pv. oryzae Causing Leaf Blight Disease in Rice Plant

Abstract

Xanthomonas campestris pv. oryzae is an important and destructive pathogencausing bacterial leaf blight disease in rice plant. The different tests wereconducted in this research work to know the biochemical properties of thepathogen by the three rice isolates KRH-2, Swarna & Jurly and alsoinvestigation of resistant variety of rice germplasm. Pathogen was subjected tovarious biochemical tests, the results indicated that H2S (hydrogen sulphide)production test +ve in cysteine & -ve in peptone, Starch hydrolysis in KRH-2 &Swarna rice isolates showed +ve reaction whereas, negative results wereobtained for Starch hydrolysis in Jurly rice isolate, Fluorescent test and Gramstaining showed negative reaction whereas, positive reaction were observed inCatalase test, Liquefaction of Gelatin, KOH Solubility test, Protein digestiontest