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- Title
Morphological and Biochemical Characterization of Xanthomonas oryzae pv. oryzae Isolates from different Regions of India.
- Authors
PATIL, SWATHI S.; PRASANNAKUMAR, M. K.; REDDY, N. KARUNAKAR
- Abstract
Rice is among the oldest crops of the world which feeds about half of the world's population. The most significant bacterial disease impacting the rice production is bacterial leaf blight caused by Xanthomonas oryzae pv. oryzae (Xoo). Ten Xoo isolates collected from different rice growing regions of India were characterized morphologically and their reaction to different biochemical tests. Xoo isolates were gram negative, showed positive reaction for potassium hydroxide test and catalase production. The isolates TLG2 and AP showed strong oxidase activity. All the isolates except those from Telangana state showed tolerance to 5 per cent sodium chloride. None of the isolates were able to utilize sorbitol, mannitol and malonate as carbohydrate source for their growth whereas all of them were able to grow at 37 °C. Among all the isolates, KA showed highest swarming ability along with exopolysaccharide and xanthomonadin production. The results indicate that there exists variation in physiological characters among the Xoo isolates and this may have impact on their virulence and survival.
- Subjects
INDIA; XANTHOMONAS oryzae; RICE diseases &; pests; GRAM-negative bacteria; MICROBIAL exopolysaccharides; POTASSIUM hydroxide; BACTERIAL diseases; SALT
- Publication
Mysore Journal of Agricultural Sciences, 2023, Vol 57, Issue 3, p344
- ISSN
0047-8539
- Publication type
Article