FgMsn2 negatively regulates general stress responses and autophagy in Fusarium graminearum
Effective adaptation to diverse stressors is essential for fungal survival and pathogenicity. The mechanisms underlying general stress responses in Fusarium graminearum , the pathogen responsible for Fusarium head blight (FHB) in cereal crops, remain unclear. In this study, we identify FgMsn2 as a n...
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Published in | Phytopathology Research Vol. 7; no. 1; pp. 1 - 10 |
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Main Authors | , , |
Format | Journal Article |
Language | English |
Published |
London
BioMed Central
19.06.2025
BMC |
Subjects | |
Online Access | Get full text |
ISSN | 2524-4167 2524-4167 |
DOI | 10.1186/s42483-025-00341-5 |
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Summary: | Effective adaptation to diverse stressors is essential for fungal survival and pathogenicity. The mechanisms underlying general stress responses in
Fusarium graminearum
, the pathogen responsible for
Fusarium
head blight (FHB) in cereal crops, remain unclear. In this study, we identify
FgMsn2
as a negative regulator of general stress responses in
F. graminearum
. Deletion of
FgMsn2
leads to resistance of
F. graminearum
to oxidative, osmotic, and cell wall stresses. Mechanically, FgMsn2 represses autophagy by inhibiting the expression of autophagy-related genes, including
FgATG8
, and stress conditions trigger the cytoplasmic localization of FgMsn2. Additionally, the Δ
FgMsn2
mutants show significantly reduced virulence on wheat, indicating the critical role of
FgMsn2
in pathogenicity. These findings uncover a unique regulatory function of FgMsn2, which contrasts with its positive role in stress responses reported in other fungi, and provide valuable insights for developing novel strategies to manage FHB. |
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ISSN: | 2524-4167 2524-4167 |
DOI: | 10.1186/s42483-025-00341-5 |