Differential induction of superoxide dismutase in downy mildew-resistant and -susceptible genotypes of pearl millet

Babitha, M. P. ; Bhat, S. G. ; Prakash, H. S. ; Shetty, H. S. (2002) Differential induction of superoxide dismutase in downy mildew-resistant and -susceptible genotypes of pearl millet Plant Pathology, 51 (4). pp. 480-486. ISSN 0032-0862

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Official URL: http://onlinelibrary.wiley.com/doi/10.1046/j.1365-...

Related URL: http://dx.doi.org/10.1046/j.1365-3059.2002.00733.x

Abstract

Differential induction of superoxide dismutase (SOD) in downy mildew-resistant and -susceptible genotypes of pearl millet (Pennisetum glaucum) was observed on inoculation with Sclerospora graminicola. SOD activity was studied in resistant (IP18292) and susceptible (23B) pearl millet seedlings inoculated with S. graminicola. SOD activity increased by 2.3-fold in resistant seedlings upon inoculation. SOD activity was greatest in roots, with a specific activity of 3182 U per mg protein, after inoculation. SOD activity increased in all the resistant genotypes upon inoculation with S. graminicola. Native PAGE analysis showed four isozymes of SOD, three of which (SOD-1, -2 and -4) were Cu/Zn-SOD, whereas isozyme SOD-3 was Mn-SOD. This study also revealed increased intensity of all four isozymes of SOD in the resistant genotype upon inoculation. The involvement of SOD in pearl millet (host)-downy mildew pathogen interaction is discussed.

Item Type:Article
Source:Copyright of this article belongs to John Wiley and Sons.
Keywords:Downy Mildew; Host-pathogen Interaction; Isozymes; Pearl Millet; Sclerospora graminicola; Superoxide Dismutase
ID Code:46633
Deposited On:05 Jul 2011 12:50
Last Modified:18 May 2016 02:27

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