Yu Mina, Yu Junjie, Cao Huijuan, Pan Xiayan, Song Tianqiao, Qi Zhongqiang, Du Yan, Huang Shiwen, Liu Yongfeng
State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou 311400, China.
Institute of Plant Protection, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China.
J Fungi (Basel). 2022 May 4;8(5):479. doi: 10.3390/jof8050479.
Rice false smut, caused by , is a serious disease of rice worldwide, severely reducing the quantity and quality of rice production. The conserved fungal velvet proteins are global regulators of diverse cellular processes. We identified and functionally characterized two velvet genes, and , in . The deletion of these genes affected the conidiation of but had no effect on the virulence of this pathogen. Interestingly, the Δ mutants appeared in the form of smaller false smut balls with a reduced number of chlamydospores compared with the wide-type strains. In addition, the deletion of affected the expression of some transmembrane transport genes during chlamydospore formation and rice false smut balls development. Furthermore, the Δ mutants were shown to be defective in the utilization of glucose. These findings proved the regulatory mechanism underlying the formation of rice false smut balls and chlamydospores and provided a basis for the further exploration of the mechanism of these processes.
稻曲病由[病原体名称未给出]引起，是一种在全球范围内严重危害水稻的病害，会大幅降低水稻产量和品质。保守的真菌天鹅绒蛋白是多种细胞过程的全局调节因子。我们在[病原体名称未给出]中鉴定并对两个天鹅绒基因[基因名称未给出]和[基因名称未给出]进行了功能表征。这些基因的缺失影响了[病原体名称未给出]的分生孢子形成，但对该病原体的毒力没有影响。有趣的是，与野生型菌株相比，Δ突变体呈现出较小的稻曲球形式，厚垣孢子数量减少。此外，[基因名称未给出]的缺失影响了厚垣孢子形成和稻曲球发育过程中一些跨膜转运基因的表达。此外，Δ突变体在葡萄糖利用方面存在缺陷。这些发现证明了稻曲球和厚垣孢子形成的调控机制，并为进一步探索这些过程的机制提供了基础。
