文献类型： 外文期刊
作者： Chen, Keyi 1 ; Wang, Qiming 1 ; Yu, Xiaowen 1 ; Wang, Chaolong 1 ; Gao, Junwen 1 ; Zhang, Shihao 1 ; Cheng, Siqi 1 ; You, Shimin 1 ; Zheng, Hai 1 ; Lu, Jiayu 1 ; Zhu, Xufei 1 ; Lei, Dekun 1 ; Jian, Anqi 1 ; He, Xiaodong 1 ; Yu, Hao 1 ; Chen, Yun 1 ; Zhou, Mingli 1 ; Li, Kai 1 ; He, Ling 1 ; Tian, Yunlu 1 ; Liu, Xi 1 ; Liu, Shijia 1 ; Jiang, Ling 1 ; Bao, Yiqun 2 ; Wang, Haiyang 3 ; Zhao, Zhigang 1 ; Wan, Jianmin 1 ;
作者机构： 1.Nanjing Agr Univ, State Key Lab Crop Genet & Germplasm Enhancement &, Zhongshan Biol Breeding Lab, Nanjing 210095, Peoples R China
2.Nanjing Agr Univ, Sch Life Sci, Nanjing 210095, Peoples R China
3.Chinese Acad Agr Sci, Inst Crop Sci, Natl Key Facil Crop Gene Resources & Genet Improve, Beijing 100081, Peoples R China
期刊名称：NATURE COMMUNICATIONS （ 影响因子：16.6； 五年影响因子：17.0 ）
ISSN：
年卷期： 2024 年 15 卷 1 期
页码：
收录情况： SCI
摘要： In higher plants, mature male gametophytes have distinct apertures. After pollination, pollen grains germinate, and a pollen tube grows from the aperture to deliver sperm cells to the embryo sac, completing fertilization. In rice, the pollen aperture has a single-pore structure with a collar-like annulus and a plug-like operculum. A crucial step in aperture development is the formation of aperture plasma membrane protrusion (APMP) at the distal polar region of the microspore during the late tetrad stage. Previous studies identified OsINP1 and OsDAF1 as essential regulators of APMP and pollen aperture formation in rice, but their precise molecular mechanisms remain unclear. We demonstrate that the Poaceae-specific OsSRF8 gene, encoding a STRUBBELIG-receptor family 8 protein, is essential for pollen aperture formation in Oryza sativa. Mutants lacking functional OsSRF8 exhibit defects in APMP and pollen aperture formation, like loss-of-function OsINP1 mutants. OsSRF8 is specifically expressed during early anther development and initially diffusely distributed in the microsporocytes. At the tetrad stage, OsSRF8 is recruited by OsINP1 to the pre-aperture region through direct protein-protein interaction, promoting APMP formation. The OsSRF8-OsINP1 complex then recruits OsDAF1 to the APMP site to co-regulate annulus formation. Our findings provide insights into the mechanisms controlling pollen aperture formation in cereal species. At the tetrad stage, OsSRF8 interacts with OsINP1 to promote the formation of aperture plasma membrane protrusion (APMP). Then, the OsINP1-OsSRF8 protein complex recruits OsDAF1 to the APMP site and co-regulate pollen aperture formation in rice.
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