The APSES transcription factor LmStuA is required for sporulation, pathogenic development and effector gene expression in Leptosphaeria maculans

Molecular Plant Pathology
Jessica L SoyerIsabelle Fudal

Abstract

Leptosphaeria maculans causes stem canker of oilseed rape (Brassica napus). The APSES transcription factor StuA is a key developmental regulator of fungi, involved in morphogenesis, conidia production and also more recently described as required for secondary metabolite production and for effector gene expression in phytopathogenic fungi. We investigated the involvement of the orthologue of StuA in L. maculans, LmStuA, in morphogenesis, pathogenicity and effector gene expression. LmStuA is induced during mycelial growth and at 14 days after infection, corresponding to the development of pycnidia on oilseed rape leaves, consistent with the function of StuA described so far. We set up the functional characterization of LmStuA using an RNA interference approach. Silenced LmStuA transformants showed typical phenotypic defects of StuA mutants with altered growth in axenic culture and impaired conidia production and perithecia formation. Silencing of LmStuA abolished the pathogenicity of L. maculans on oilseed rape leaves and also resulted in a drastic decrease in expression of at least three effector genes during in planta infection, suggesting either that LmStuA regulates, directly or indirectly, the expression of several effector ...Continue Reading

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Citations

Apr 21, 2017·PLoS Pathogens·Kar-Chun Tan, Richard P Oliver
Nov 23, 2017·Frontiers in Plant Science·Ting Xiang NeikJacqueline Batley
Aug 14, 2018·FEMS Yeast Research·Larissa V G LongoChad A Rappleye
Apr 19, 2019·FEMS Microbiology Letters·Andrew S Urquhart, Alexander Idnurm
Jun 25, 2017·Annual Review of Phytopathology·H Charlotte van der Does, Martijn Rep
Aug 30, 2018·Frontiers in Microbiology·Anna M M TileyAndy M Bailey
Aug 26, 2017·Current Microbiology·Andrew S Urquhart, Alexander Idnurm
Jan 6, 2021·International Journal of Molecular Sciences·Aldrin Y CantilaJacqueline Batley
May 12, 2021·Molecular Plant Pathology·Evan JohnKar-Chun Tan
Jun 15, 2021·Frontiers in Microbiology·Yan PengBing L Xu

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