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Type: Journal article
Title: Proteinaceous metabolites from Pyrenophora teres contribute to symptom development of barley net blotch
Author: Sarpeleh, A.
Wallwork, H.
Catcheside, D.
Tate, M.
Able, A.
Citation: Phytopathology, 2007; 97(8):907-915
Publisher: Amer Phytopathological Soc
Issue Date: 2007
ISSN: 0031-949X
Statement of
Abolfazl Sarpeleh, Hugh Wallwork, David E. A. Catcheside, Max E. Tate, and Amanda J. Able
Abstract: Pyrenophora teres, the causal agent of net blotch of barley (Hordeum vulgare L.), induces a combination of necrosis and extensive chlorosis in susceptible barley cultivars. Cell-free filtrates from both net and spot forms of P. teres; P. teres f. sp. teres, and P. teres f. sp. maculata were found to contain phytotoxic low molecular weight compounds (LMWCs) and proteinaceous metabolites which appear to be responsible for different components of the symptoms induced by the two forms of the pathogen in a susceptible cultivar of barley (cv. Sloop). Proteins induced only brown necrotic spots or lesions similar to those induced by the pathogens 72 h after inoculation. In contrast, LMWCs induced general chlorosis seen 240 h after inoculation but not the localized necrosis. Neither hydrolyzed or heat- or protease-treated proteinaceous metabolites induced the symptoms. This is the first report of the involvement of proteins produced by P. teres in symptom development during net blotch disease of barley.
Keywords: phytotoxins; symptom induction
Description: Copyright The American Phytopathological Society
RMID: 0020071201
DOI: 10.1094/PHYTO-97-8-0907
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Appears in Collections:Agriculture, Food and Wine publications

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