Functional Analysis of Wheat TaPaO1 Gene Conferring Pollen Sterility Under Low Temperature
文献类型： 外文期刊
作者： Yuan, Guoliang 1 ; Wang, Yukun 1 ; Yuan, Shaohua 1 ; Wang, Peng 1 ; Duan, Wenjing 1 ; Bai, Jianfang 1 ; Sun, Hui 1 ; Wang 1 ;
作者机构： 1.Beijing Acad Agr & Forestry, Beijing Engn & Tech Res Ctr Hybrid Wheat, Beijing 100097, Peoples R China
2.Municipal Key Lab Mol Genet Hybrid Wheat, Beijing 100097, Peoples R China
关键词： Male-sterility; Meiosis; Pheophorbide a oxygenase; Pollen; Wheat
期刊名称：JOURNAL OF PLANT BIOLOGY （ 影响因子：2.434； 五年影响因子：2.455 ）
ISSN： 1226-9239
年卷期： 2018 年 61 卷 1 期
页码：
收录情况： SCI
摘要： Thermosensitive male sterility plays an important role in wheat fertility and production. As a key enzyme for chlorophyll degradation, pheophorbide a oxygenase (PaO) can suppress cell death in plants. We cloned the wheat gene TaPaO1 from the thermosensitive genetic male sterile (TGMS) line BS366; it encodes a typical PaO protein, containing a conserved Rieske [2Fe-2S] iron-sulphur motif, a mononuclear non-heme iron-binding motif, and a C-terminal CxxC motif. TaPaO1 was expressed in all tissues and was upregulated during the meiosis stage of BS366 anthers under low temperature. Subcellular localization of TaPaO1 specifically labelled the surrounding of chloroplasts. TaPaO1 regulated by RD29A promoter which responded to low temperature led to pollen sterility in transgenic tobacco. Expression analysis showed that TaPaO1 exhibited a higher level of expression in the anther than in other tissues in transgenic tobacco plants during low temperature treatment. We propose that the higher senescence-related activity of TaPaO1 may lead to the cell death of anthers, which happens at an early developmental stage under low temperature. These results provide new insights into the function of PaO during the early developmental stage of anthers. PaO is closely related to cell death regardless of whether it exhibits increased activity or inactive.
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