Gene characterization and molecular pathway analysis of reverse thermosensitive genic male sterility in eggplant (Solanum melongena L.)
文献类型： 外文期刊
作者： Li, Bing 1 ; Chen, Xueping 1 ; Wu, Yanrong 2 ; Gu, Aixia 1 ; Zhang, Jingjing 2 ; Luo, Shuangxia 1 ; Gao, Xiurui 2 ; Zhao, 1 ;
作者机构： 1.Hebei Agr Univ, Coll Hort, Collaborat Innovat Ctr Vegetable Ind Hebei, Key Lab Vegetable Germplasm Innovat & Utilizat He, Baoding 071000, Peoples R China
2.Hebei Acad Agr & Forestry Sci, Inst Cash Crops, Shijiazhuang 050051, Hebei, Peoples R China
期刊名称：HORTICULTURE RESEARCH （ 影响因子：6.793； 五年影响因子：6.589 ）
ISSN：
年卷期： 2019 年 6 卷
页码：
收录情况： SCI
摘要： The naturally occurring mutant eggplant line 05ms was identified with reverse thermosensitive genic male sterility (rTGMS), but its temperature-responsive fertility mechanisms remain largely unknown. Here, we studied the flower morphology, anther cellular structure, and genome-wide gene expression of this rTGMS line. Candidate genes for thermosensitive male sterility during the microspore development of 05ms and the temperature-insensitive line S63 under low-temperature (LT) and high-temperature (HT) conditions were identified. Under LT, tapetum cells were vacuolated and had delayed disintegration in 05ms. RNA-seq analysis indicated that DEGs were enriched in the KEGG pathways 'plant hormone signal transduction', 'starch and sucrose metabolism', and 'phenylpropanoid biosynthesis'. We identified two genes, 4CLL1 (Sme2.5_00368.1_g00010.1) and CKI1 (Sme2.5_10056.1_g00002.1), which could potentially regulate eggplant anther development and may be candidate genes for rTGMS. Finally, we propose a working model of anther abortion for rTGMS in eggplant. CKI1 responds to LT stress and causes expression changes in genes related to anther development, such as 4CLL1, and the cellular structure of the tapetum becomes abnormal, causing male sterility. The findings of this study explain the underlying molecular mechanisms of male sterility in eggplant rTGMS lines.
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