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Open AccessArticle
The Forkhead Box Gene, MaSep1, Negatively Regulates UV- and Thermo-Tolerances and Is Required for Microcycle Conidiation in Metarhizium acridum
by
Tiantian Song
Tiantian Song 1,2,3,4,†,
Chan Li
Chan Li 1,2,3,4,†,
Kai Jin
Kai Jin 1,2,3,4,*
and
Yuxian Xia
Yuxian Xia 1,2,3,4,*
1
Genetic Engineering Research Center, School of Life Sciences, Chongqing University, Chongqing 401331, China
2
Chongqing Engineering Research Center for Fungal Insecticide, Chongqing 401331, China
3
Key Laboratory of Gene Function and Regulation Technologies Under Chongqing Municipal Education Commission, Chongqing 401331, China
4
National Engineering Research Center of Microbial Pesticides, Chongqing 401331, China
*
Authors to whom correspondence should be addressed.
†
These authors contributed equally to this work.
J. Fungi 2024, 10(8), 544; https://doi.org/10.3390/jof10080544 (registering DOI)
Submission received: 10 July 2024
/
Revised: 30 July 2024
/
Accepted: 1 August 2024
/
Published: 2 August 2024
Abstract
Insect pathogenic fungi have shown great potential in agricultural pest control. Conidiation is crucial for the survival of filamentous fungi, and dispersal occurs through two methods: normal conidiation, where conidia differentiate from mycelium, and microcycle conidiation, which involves conidial budding. The conidiation process is related to cell separation. The forkhead box gene Sep1 in Schizosaccharomyces pombe plays a crucial role in cell separation. Nevertheless, the function of Sep1 has not been clarified in filamentous fungi. Here, MaSep1, the homolog of Sep1 in Metarhizium acridum, was identified and subjected to functional analysis. The findings revealed that conidial germination of the MaSep1-deletion strain (ΔMaSep1) was accelerated and the time for 50% germination rate of conidial was shortened by 1 h, while the conidial production of ΔMaSep1 was considerably reduced. The resistances to heat shock and UV-B irradiation of ΔMaSep1 were enhanced, and the expression of some genes involved in DNA damage repair and heat shock response was significantly increased in ΔMaSep1. The disruption of MaSep1 had no effect on the virulence of M. acridum. Interestingly, ΔMaSep1 conducted the normal conidiation on the microcycle conidiation medium, SYA. Furthermore, 127 DEGs were identified by RNA-Seq between the wild-type and ΔMaSep1 strains during microcycle conidiation, proving that MaSep1 mediated the conidiation pattern shift by governing some genes associated with conidiation, cell division, and cell wall formation.
Share and Cite
MDPI and ACS Style
Song, T.; Li, C.; Jin, K.; Xia, Y.
The Forkhead Box Gene, MaSep1, Negatively Regulates UV- and Thermo-Tolerances and Is Required for Microcycle Conidiation in Metarhizium acridum. J. Fungi 2024, 10, 544.
https://doi.org/10.3390/jof10080544
AMA Style
Song T, Li C, Jin K, Xia Y.
The Forkhead Box Gene, MaSep1, Negatively Regulates UV- and Thermo-Tolerances and Is Required for Microcycle Conidiation in Metarhizium acridum. Journal of Fungi. 2024; 10(8):544.
https://doi.org/10.3390/jof10080544
Chicago/Turabian Style
Song, Tiantian, Chan Li, Kai Jin, and Yuxian Xia.
2024. "The Forkhead Box Gene, MaSep1, Negatively Regulates UV- and Thermo-Tolerances and Is Required for Microcycle Conidiation in Metarhizium acridum" Journal of Fungi 10, no. 8: 544.
https://doi.org/10.3390/jof10080544
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