volume 43 issue 3 (september 2009) : 157-165
BIOCHEMICAL CHANGES IN ACID LIME DURING PATHOGENICITY OF CANKER PATHOGEN
1Agricultural College and Research Institute
TNAU, Madurai- 625 002, India.
ABSTRACT
Studies were conducted to screen out the compatible host and pathogen
combination with acid lime and canker causing pathogenic culture of Xanthomonas
axonopodis pv. citri (Xac). Among the 21 isolates collected from acid lime cultivating
areas of Tamil Nadu, isolate I3 was found to be the most virulent. This compatible
combination was tested under controlled environment condition at 28oC and its
effect on biochemical parameters of host metabolism was studied. The biochemical
changes in the host during the course of pathogenicity include, slight increase in
protein, phenol, phenyl alanine ammonia lyase (PAL), -1, 3-glucanase and chitinase
enzymes. Significant increase in the activities of peroxidase (POX), polyphenol oxidase
(PPO) and catalase was observed in the infected tissues. Total and non-reducing
sugars decreased, but reducing sugar content increased slightly.
combination with acid lime and canker causing pathogenic culture of Xanthomonas
axonopodis pv. citri (Xac). Among the 21 isolates collected from acid lime cultivating
areas of Tamil Nadu, isolate I3 was found to be the most virulent. This compatible
combination was tested under controlled environment condition at 28oC and its
effect on biochemical parameters of host metabolism was studied. The biochemical
changes in the host during the course of pathogenicity include, slight increase in
protein, phenol, phenyl alanine ammonia lyase (PAL), -1, 3-glucanase and chitinase
enzymes. Significant increase in the activities of peroxidase (POX), polyphenol oxidase
(PPO) and catalase was observed in the infected tissues. Total and non-reducing
sugars decreased, but reducing sugar content increased slightly.
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Indian Journal of Agricultural Research
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