Cochliobolus heterostrophus T-toxin gene expression modulation via G protein and MAPK pathways

Ofir Degani
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Ofir Degani: Tel-Hai College, Upper Galilee, Israel

Plant Protection Science, 2015, vol. 51, issue 2, 53-60

Abstract: The role of G-protein and mitogen-activated protein kinase (MAPK) in filamentous fungi has been studied for over a decade, but downstream elements are less known. Here, we used microarray and Northern blot analysis to examine the involvement of these signalling pathways in controlling the knownCochliobolus heterostrophus T-toxin biosynthetic gene, DEC1, whose control is important in epidemic prevention. Comparison of the expression profile in wild-type strains and in G-protein and MAPK signalling deficient mutants revealed a unique, environmental-dependent control mechanism for the DEC1 gene. The results suggest, for the first time, a possible role in pathogenicity for the G-protein α2 subunit in this organism, and hint to a common role of G-protein α1 and β1 subunits and MAPK in maintaining accurate levels of this toxin during pathogenesis.

Keywords: Cochliobolus heterostrophus; DEC1 gene; fungal RNA; maize; signal transduction; Southern corn leaf blight (search for similar items in EconPapers)
Date: 2015
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Persistent link: https://EconPapers.repec.org/RePEc:caa:jnlpps:v:51:y:2015:i:2:id:67-2014-pps

DOI: 10.17221/67/2014-PPS

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