ABORTED GAMETOPHYTE 1 is required for gametogenesis in Ardbidopsis

In flowering plants, the male and female gameto- genesis is a crucial step of sexual reproduction. Although many genes have been identified as being involved in the gametogenesis process, the genetic mechanisms underlying gametogenesis remains poorly understood. We reported here characterization of...

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Published in:植物学报：英文版 2015 (12), p.1003-1016
Main Author: Hong-Hui cui Hong-Ze Liao Yu Tang Xin-Yu Du Li-Qun Chen De Ye Xue-Qin Zhang
Format: Article
Language:English
Subjects:
发生过程
多基因
开花植物
有性生殖
氨基酸序列
生育能力
遗传机制
配子体
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Summary:In flowering plants, the male and female gameto- genesis is a crucial step of sexual reproduction. Although many genes have been identified as being involved in the gametogenesis process, the genetic mechanisms underlying gametogenesis remains poorly understood. We reported here characterization of the gene, ABORTED GAMETOPHYTE 1 （AOGI） that is newly identified as essential for gametogenesis in Arabidopsis thaliana. AOG1 is expressed predominantly in reproductive tissues including the developing pollen grains and ovules. The AOG1 protein shares no significant amino acid sequence similarity with other documented proteins and is located mainly in nuclei of the cells. Mutation in AOG~ caused degeneration of pollen at the uninucleate microspore stage and severe defect in embryo sacs, leading to a significant reduction in male and female fertility.Furthermore, the molecular analyses showed that the aogl mutant significantly affected the expression of several genes, which are required for gametogenesis. Our results suggest that AOG1 plays important roles in gameto- genesis at the stage prior to pollen mitosis 1 （PMI） in Arabidopsis, possibly through collaboration with other genes.
ISSN:1672-9072
1744-7909