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首页> 外文期刊>Journal of Experimental Botany >Evidence for the involvement of the Arabidopsis SEC24A in male transmission
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Evidence for the involvement of the Arabidopsis SEC24A in male transmission

机译：拟南芥SEC24A参与男性传播的证据

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摘要

Eukaryotic cells use COPII-coated carriers for endoplasmic reticulum (ER)-to-Golgi protein transport. Selective cargo capture into ER-derived carriers is largely driven by the SEC24 component of the COPII coat. The Arabidopsis genome encodes three AtSEC24 genes with overlapping expression profiles but it is yet to be established whether the AtSEC24 proteins have overlapping roles in plant growth and development. Taking advantage of Arabidopsis thaliana as a model plant system for studying gene function in vivo, through reciprocal crosses, pollen characterization, and complementation tests, evidence is provided for a role for AtSEC24A in the male gametophyte. It is established that an AtSEC24A loss-of-function mutation is tolerated in the female gametophyte but that it causes defects in pollen leading to failure of male transmission of the AtSEC24A mutation. These data provide a characterization of plant SEC24 family in planta showing incompletely overlapping functions of the AtSEC24 isoforms. The results also attribute a novel role to SEC24 proteins in a multicellular model system, specifically in male fertility.
机译：真核细胞使用COPII包被的载体进行内质网（ER）到高尔基体蛋白的转运。选择性捕获货物到ER衍生的载具中很大程度上由COPII涂层中的SEC24成分驱动。拟南芥基因组编码三个具有重叠表达谱的AtSEC24基因，但尚未确定AtSEC24蛋白在植物生长和发育中是否具有重叠的作用。利用拟南芥作为模型植物系统，通过相互杂交，花粉鉴定和互补试验研究体内基因功能，为AtSEC24A在雄配子体中的作用提供了证据。已经确定，雌配子体中可以容忍AtSEC24A功能丧失的突变，但会导致花粉缺陷，从而导致AtSEC24A突变的男性传播失败。这些数据提供了植物中植物SEC24家族的特征，显示了AtSEC24同工型的功能不完全重叠。结果还归因于SEC24蛋白在多细胞模型系统中的新作用，特别是在雄性育性中。

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