European Journal of Plant Pathology (2002) 108, 31-39

Prachi, Tilak R. Sharma and Brij M. Singh (2002)
Salicylic acid induced insensitivity to culture filtrate of Fusarium oxysporum f.sp. zingiberi in the calli of Zingiber officinale Roscoe
European Journal of Plant Pathology 108 (1), 31-39
Abstract: Salicylic acid (SA) was used to induce insensitivity in the callus cultures of Zingiber officinale against culture filtrate (CF) of Fusarium oxysporum f.sp. zingiberi. The treatment of callus cultures with SA (10⁴ µM) prior to selection with CF of the pathogen-increased callus survival. Exogenous application of SA resulted in increased activity of peroxidase and ß-1,3-glucanase enzymes in the callus cultures. No increase in the activity of phenylalanine ammonia lyase was obtained. Two new protein bands of ~97 and 38 kDa molecular weights were obtained by SDS-PAGE analysis of soluble proteins extracted from SA-treated calli. The PR-1 monoclonal antibody used for immunodetection of induced proteins cross-reacted with the 38 kDa protein band. In vitro antifungal activity of protein extract of calli treated with SA tested against the spores of F. oxysporum f.sp. zingiberi showed significant reduction in spore germination and germ tube elongation. It is concluded that in ginger, SA may result in the induction of resistance to F. oxysporum f.sp. zingiberi by inducing increased activity of peroxidase, ß-1,3-glucanase and antifungal PR-proteins.
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Database assignments for author(s): Tilak R. Sharma

Research topic(s) for pests/diseases/weeds:
resistance/tolerance/defence of host

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Fusarium oxysporum f.sp. zingiberi	Ginger (Zingiber)	India
	Fusarium oxysporum