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Study shows corn gene provides resistance to multiple diseases
Date:5/5/2011

t-Kurti says. "The other hypothesis was that the same genes conferred resistance to multiple pathogens. Our evidence suggests that the latter hypothesis is more likely. In particular, we have developed good evidence that a specific gene, a member of a gene family called glutathione-S-tranferases, is associated with resistance to all three diseases."

Southern corn leaf blight is a moderate problem in the southeastern United States, Balint-Kurti says, and can be a significant problem in Southeast Asia, southern Europe and parts of Africa. Prevalent in hot, humid climates across the globe, it causes small brown spots on leaves. The spots get larger and eventually spread to the whole plant. Severe infections can cause major corn yield losses. Northern leaf blight can be found in the Midwestern corn belt; it causes cigar-shaped lesions on leaves. Gray leaf spot which produces an eponymous effect is found both in the Midwest and Southeast. All three pathogens are so-called necrotrophic fungi, or fungi that kill what they eat.

Balint-Kurti says the study provides "one of the most comprehensive analyses of multiple disease resistance in plants."


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Contact: Mick Kulikowski
mick_kulikowski@ncsu.edu
919-515-8387
North Carolina State University
Source:Eurekalert

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