Arachidonic acid-induced hypersensitive cell death as an assay of downy mildew resistance in pearl millet

Geetha, S. and Shetty, S. A. and Shetty, H. Shekar and Prakash, H. S. (1996) Arachidonic acid-induced hypersensitive cell death as an assay of downy mildew resistance in pearl millet. ANNALS OF APPLIED BIOLOGY, 129 (1). pp. 91-96. ISSN 0003-4746

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Official URL: http://dx.doi.org/10.1111/j.1744-7348.1996.tb05734...

Abstract

Arachidonic acid (AA) induces hypersensitive response (HR) on coleoptile/root regions of two-day-old pearl miller seedlings. The response is comparable to the HR induced by the downy mildew pathogen, Sclerospora graminicola. A time gap in the appearance of cell necrosis among genotypes of pearl millet was related to the degree of resistance to downy mildew. Based on the time required for the development of necrotic spots induced by AA, the pearl millet genotypes were categorised as highly resistant/resistant (HR in 3-6 h), susceptible (HR in 7-12 h) and highly susceptible (HR in 13 h and above). The percentage disease incidence in each genotype was compared with the time required for the development of AA-induced HR. The appearance of hypersensitive cell necrosis was rapid in genotypes having high resistance to downy mildew and was slow in genotypes with high susceptibility. This simple method of screening various pearl millet genotypes in the absence of the pathogen aids in identifying the downy mildew resistant/susceptible host cultivars without the risk of introducing the virulent race of the pathogen.

Item Type: Article
Additional Information: Unmapped bibliographic data: DA - 1996/08// [EPrints field already has value set] LA - English [Field not mapped to EPrints]
Uncontrolled Keywords: arachidonic acid, hypersensitive response, PENNISETUM GLAUCUM, screening technique
Subjects: Agriculture Biological Sciences > Botany
University of Mysore > PG Campuses > Manasagangotri, Mysore > Agriculture Biological Sciences > Botany
Divisions: PG Campuses > Manasagangotri, Mysore > Botany
Depositing User: Users 22 not found.
Date Deposited: 30 Apr 2013 09:14
Last Modified: 13 Aug 2013 09:57
URI: http://eprints.uni-mysore.ac.in/id/eprint/7188

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