Phytopathologia Mediterranea (2006) 45, 203-214

Lingan Rajendra, Duraisamy Saravanakumar, Thiruven Gadam Raguchander and Ramasamy Samiyappan (2006)
Endophytic bacterial induction of defence enzymes against bacterial blight of cotton
Phytopathologia Mediterranea 45 (3), 203-214
Abstract: Bacterial blight of cotton caused by Xanthomonas axonopodis pv. malvacearum (Xam) is a major yield constraint in cotton crops. The effect of inducing systemic resistance against Xam in cotton with a talc-based bioformulation of the endophytic Bacillus strains EPCO 102 and EPCO 16 and Pseudomonas fluorescens strain Pf1, with or without the addition of chitin, was tested under greenhouse conditions. The bioformulation, applied through seed, soil or foliar spray, significantly reduced disease incidence. The addition of chitin to the formulation reduced disease incidence still further. EPCO 102 with chitin led to the lowest bacterial blight incidence. The bacterial strains also caused higher levels of chitinase, peroxidase, polyphenol oxidase, phenylalanine ammonia-lyase and phenol in cotton, besides reduction of blight incidence. In addition, the endophytic Bacillus strains increased cotton yield under greenhouse conditions.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Database assignments for author(s): Duraisamy Saravanakumar

Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
resistance/tolerance/defence of host
Research topic(s) for beneficials or antagonists:
evaluation - screening - selection

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Xanthomonas citri subsp. malvacearum	Cotton (Gossypium)	India
Pseudomonas fluorescens (antagonist)	Xanthomonas citri subsp. malvacearum	Cotton (Gossypium)	India