Biochemical events involved in downy mildew disease resistance in pearl millet in relation to H+-ATPase

Madhu, D. ; Rekha, H. S. ; Shylaja, M. D. ; Prakash, H. S. ; Shekar Shetty, H. (2011) Biochemical events involved in downy mildew disease resistance in pearl millet in relation to H+-ATPase Archives of Phytopathology and Plant Protection, 44 (1). pp. 17-27. ISSN 0323-5408

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Official URL: http://www.tandfonline.com/doi/abs/10.1080/0323540...

Related URL: http://dx.doi.org/10.1080/03235400902831034

Abstract

Pearl millet (Pennisetum glaucum L. Br.) is the most important crop in India and Africa. Downy mildew disease of pearl millet caused by the oomycetous fungus Sclerospora graminicola (Sacc.) Schroet., is the major biological constraint in the production of pearl millet. Plasma membrane H+-ATPase is induced in resistant pearl millet against downy mildew pathogen. Sodium orthovanadate, an inhibitor of H+-ATPase, was used in this study to understand its effect on other known defence responses in pearl millet including H+-ATPase. Results suggest that vanadate down-regulates all defence responses tested, such as H+-ATPase (53±5.0%), peroxidase (36±5.6%), phenylalanine ammonia lyase (43±4.5%), β-1,3 glucanase (25±4.2%), lytic activity (32±3.0%), hypersensitive response (57±4.3%) and pathogen colonisation. These data indicate that the plasma membrane H+-ATPase may be a key step in the signaling pathway leading to defence activation in pearl millet against downy mildew disease.

Item Type:Article
Source:Copyright of this article belongs to Taylor and Francis Group.
Keywords:Pearl Millet; Downy Mildew Disease; H+-ATPase; Vanadate
ID Code:48593
Deposited On:14 Jul 2011 19:41
Last Modified:14 Jul 2011 19:41

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