摘要
Ustilaginoidea virens is the causal agent of rice false smut,which can be a highly destructive disease of rice.The plasma membrane phosphatase Psr1 proteins,which act as a regulator of the salinity stress response in yeast,are widely distributed across fungi,but their functional characterization is sketchy.In this study,we characterized the functions of Psr1 protein,UvPsr1,in U.virens.Analyses of the AUvpsr1 and its complementation strain showed that UvPsr1 is required for normal mycelial growth,conidiation and tolerance to oxidative,osmotic and cell wall stresses.When rice panicles were inoculated with the AUvpsr1 strains,no symptoms of false smut disease developed,showing that UvPSR1 also contributes to the pathogenicity of the fungus.The deletion mutant of UvPSR1 also appeared to produce a smaller titer of toxic compounds able to inhibit elongation of the germinated seeds.In conclusion,our results indicated that UvPsr1 is a new pathogenic factor of U.virens.
基金
This research was funded by Zhejiang Provincial Natural Science Foundation of China(Grant No.LQ19C140004)
Key Research and Development Project of Zhejiang Province(Grant No.2019C02018)
the Chinese Academy of Agricultural Sciences under the‘Elite Youth’program,and the Agricultural Sciences and Technologies Innovation Program.We thank Prof.HUANG Junbin of Huazhong Agriculture University(Wuhan,China)for providing inoculum of the U.virens strain HWD-2.
