Identification, characterization, and mapping of Ecm1, a locus affecting extracellular matrix production and lesion size in Cochliobolus heterostrophus.

Abstract excerpt

A mutant of Cochliobolus heterostrophus lacking the outer layer of extracellular matrix around its germ tubes and hyphae was obtained by mutagenizing protoplasts. The mutant not only lacks the outer matrix, but also produces much smaller lesions on corn leaves than nonmutant strains; the area of mutant lesions averages 0.6 mm2 compared with 5.8 mm2 for nonmutant lesions. Genetic analysis demonstrated that the...

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