Kinesin proteins HUG1 and HUG2 are essential for the formation and transportation of male germ units in Arabidopsis pollen tubes
文献类型： 外文期刊
作者： Yan, Yu 1 ; Dai, Liufeng 1 ; Wang, Baojie 1 ; Wang, Ting 1 ; Sun, Zhenping 1 ; Wang, Yunzi 1 ; Xing, Chengcheng 1 ; Zhou, Jing 1 ; Luo, Xiaoyan 1 ; Zhu, Yu 4 ; McFarlane, Heather E. 4 ; Gong, Yu 5 ; Zhang, Xiaoxia 5 ; Xu, Bo 5 ; Hu, Yuping 1 ; Ren, Haiyun 1 ; Zhang, Yi 1 ;
作者机构： 1.Beijing Normal Univ, Coll Life Sci, Key Lab Cell Proliferat & Regulat Biol, Minist Educ, Beijing, Peoples R China
2.Guangdong Inst Intelligence Sci & Technol, Zhuhai, Peoples R China
3.Beijing Normal Univ, Adv Inst Nat Sci, Ctr Biol Sci & Technol, Zhuhai Macao Biotechnol Joint Lab, Zhuhai, Peoples R China
4.Univ Toronto, Dept Cell & Syst Biol, Toronto, ON, Canada
5.Chinese Acad Sci, Inst Bot, State Key Lab Plant Divers & Specialty Crops, State Key Lab Systemat & Evolutionary Bot, Beijing, Peoples R China
6.Chinese Acad Agr Sci, Biotechnol Res Inst, Beijing, Peoples R China
期刊名称：NATURE PLANTS （ 影响因子：13.6； 五年影响因子：17.0 ）
ISSN： 2055-026X
年卷期： 2025 年 11 卷 8 期
页码：
收录情况： SCI
摘要： Flowering plants rely on double fertilization for their sexual reproduction. A pair of immotile sperm cells (SCs) are conveyed through a pollen tube into the female gametophyte, where they fertilize the egg cell and central cell to give rise to the embryo and endosperm in seeds, respectively1, 2, 3-4. The SCs and the pollen vegetative nucleus (VN) move as a male germ unit (MGU) in pollen tubes5,6. The tryptophan-proline-proline (WPP) domain-interacting tail-anchored proteins (WITs) and WPP domain-interacting proteins (WIPs) are involved in VN migration, and the cytoskeleton is required for MGU transportation in pollen tubes7, 8, 9, 10-11. Here we report that two kinesins, referred to as HUG1 and HUG2, localize at the VN envelope in a WIT- and WIP-dependent manner and surround the SCs in pollen. Mutation of HUG1 and HUG2 leads to disconnected VN and SCs, impaired MGU transportation and reduced plant fertility, supporting key roles of HUG proteins in MGU formation and transportation in pollen.
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