An important role for secreted esterase in disease establishment of the wheat powdery mildew fungus Blumeria graminis f. sp.tritici | Zendy

Jie Feng | Zendy; Feng Wang | Zendy; G. R. Hughes | Zendy; Susan G. W. Kaminskyj | Zendy; Yangdou Wei | Zendy

Open Access

An important role for secreted esterase in disease establishment of the wheat powdery mildew fungus Blumeria graminis f. sp.tritici

Author(s) -

Jie Feng,

Feng Wang,

G. R. Hughes,

Susan G. W. Kaminskyj,

Yangdou Wei

Publication year - 2011

Publication title -

canadian journal of microbiology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.635

H-Index - 94

eISSN - 1480-3275

pISSN - 0008-4166

DOI - 10.1139/w10-120

Subject(s) - blumeria graminis , powdery mildew , germ tube , conidium , esterase , biology , fungus , germination , hypha , ascomycota , serine , botany , microbiology and biotechnology , biochemistry , enzyme , plant disease resistance , gene

The activity of esterase secreted by conidia of wheat powdery mildew fungus, Blumeria graminis f. sp. tritici, was assayed using indoxyl acetate hydrolysis, which generates indigo blue crystals. Mature, ungerminated, and germinating conidia secrete esterase(s) on artificial media and on plant leaf surfaces. The activity of these esterases was inhibited by diisopropyl fluorophosphate, which is selective for serine esterases. When conidia were inoculated on wheat leaves pretreated with diisopropyl fluorophosphate, both appressorial germ tube differentiation and symptom development were significantly impaired, indicating an important role of secreted serine esterases in wheat powdery mildew disease establishment.

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