Genome Wide Identification and Characterization of Wheat GH9 Genes Reveals Their Roles in Pollen Development and Anther Dehiscence
文献类型： 外文期刊
作者： Luo, Liqing 1 ; Bai, Jianfang 2 ; Yuan, Shaohua 2 ; Guo, Liping 1 ; Liu, Zihan 2 ; Guo, Haoyu 2 ; Zhang, Tianbao 1 ; Duan, Wenjing 1 ; Li, Yanmei 1 ; Zhao, Changping 2 ; Song, Xiyue 1 ; Zhang, Liping 2 ;
作者机构： 1.Northwest A&F Univ, Coll Agron, Yangling 712100, Shaanxi, Peoples R China
2.Beijing Acad Agr & Forestry Sci Res Inst, Key Lab Mol Genet Hybrid Wheat, Beijing 100097, Peoples R China
关键词： anther dehiscence; cellulose; GH9; phytohormone crosstalk; pollen sterility; wheat
期刊名称：INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES （ 影响因子：6.208； 五年影响因子：6.628 ）
ISSN：
年卷期： 2022 年 23 卷 11 期
页码：
收录情况： SCI
摘要： Glycoside hydrolase family 9 (GH9) is a key member of the hydrolase family in the process of cellulose synthesis and hydrolysis, playing important roles in plant growth and development. In this study, we investigated the phenotypic characteristics and gene expression involved in pollen fertility conversion and anther dehiscence from a genomewide level. In total, 74 wheat GH9 genes (TaGH9s) were identified, which were classified into Class A, Class B and Class C and unevenly distributed on chromosomes. We also investigated the gene duplication and reveled that fragments and tandem repeats contributed to the amplification of TaGH9s. TaGH9s had abundant hormone-responsive elements and light-responsive elements, involving JA-ABA crosstalk to regulate anther development. Ten TaGH9s, which highly expressed stamen tissue, were selected to further validate their function in pollen fertility conversion and anther dehiscence. Based on the cell phenotype and the results of the scanning electron microscope at the anther dehiscence period, we found that seven TaGH9s may target miRNAs, including some known miRNAs (miR164 and miR398), regulate the level of cellulose by light and phytohormone and play important roles in pollen fertility and anther dehiscence. Finally, we proposed a hypothesis model to reveal the regulation pathway of TaGH9 on fertility conversion and anther dehiscence. Our study provides valuable insights into the GH9 family in explaining the male sterility mechanism of the wheat photo-thermo-sensitive genetic male sterile (PTGMS) line and generates useful male sterile resources for improving wheat hybrid breeding.
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