Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 351637
Title MgHog1 regulates dimorphism and pathogenicity in the fungal wheat pathogen Mycosphaerella graminicola
Author(s) Mehrabi, R.; Zwiers, L.H.; Waard, M. de; Kema, G.H.J.
Source Molecular Plant-Microbe Interactions 19 (2006)11. - ISSN 0894-0282 - p. 1262 - 1269.
Department(s) Laboratory of Phytopathology
Biointeracties and Plant Health
Publication type Refereed Article in a scientific journal
Publication year 2006
Keyword(s) activated protein-kinase - candida-albicans - osmotic-stress - saccharomyces-cerevisiae - glycerol accumulation - neurospora-crassa - hydrogen-peroxide - hog1 gene - yeast - homolog
Abstract The dimorphic ascomycete pathogen Mycosphaerella graminicola switches from a yeastlike form to an infectious filamentous form that penetrates the host foliage through stomata. We examined the biological function of the mitogenactivated protein kinase¿encoding gene MgHog1 in M. graminicola. Interestingly, MgHog1 mutants were unable to switch to filamentous growth on water agar that mimics the nutritionally poor conditions on the foliar surface and, hence, exclusively developed by a yeastlike budding process. Consequently, due to impaired initiation of infectious germ tubes, as revealed by detailed in planta cytological analyses, the MgHog1 mutants failed to infect wheat leaves. We, therefore, conclude that MgHog1 is a new pathogenicity factor involved in the regulation of dimorphism in M. graminicola. Furthermore, MgHog1 mutants are osmosensitive, resistant to phenylpyrrole and dicarboximide fungicides, and do not melanize
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