Abstract:
: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.
journal_name
Phytopathologyjournal_title
Phytopathologyauthors
Sarpeleh A,Wallwork H,Catcheside DE,Tate ME,Able AJdoi
10.1094/PHYTO-97-8-0907subject
Has Abstractpub_date
2007-08-01 00:00:00pages
907-15issue
8eissn
0031-949Xissn
1943-7684journal_volume
97pub_type
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