J Integr Plant Biol. ›› 2015, Vol. 57 ›› Issue (12): 1003-1016.DOI: 10.1111/jipb.12341

Special Issue: Sexual Reproductions

• Cell and Developmental Biology • Previous Articles     Next Articles

ABORTED GAMETOPHYTE 1 is required for gametogenesis in Arabidopsis

Hong-Hui Cui, Hong-Ze Liao, Yu Tang, Xin-Yu Du, Li-Qun Chen, De Ye and Xue-Qin Zhang*   

  1. State Key Laboratory of Plant Physiology and Biochemistry, College of Biological Sciences, China Agricultural University, Beijing, China
  • Received:2014-10-20 Accepted:2015-02-11 Published:2015-12-01
  • About author:*Correspondence: E-mail: kouyang@cau.edu.cn

Abstract:

In flowering plants, the male and female gametogenesis 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 (AOG1) 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 AOG1 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 aog1 mutant significantly affected the expression of several genes, which are required for gametogenesis. Our results suggest that AOG1 plays important roles in gametogenesis at the stage prior to pollen mitosis I (PMI) in Arabidopsis, possibly through collaboration with other genes.

 

Cui HH, Liao HZ, Tang Y, Du XY, Chen LQ, Ye D, Zhang XQ (2015) ABORTED GAMETOPHYTE 1 is required for gametogenesis in Arabidopsis. J Integr Plant Biol 57: 1003–1016 doi: 10.1111/jipb.12341

Key words: Arabidopsis, embryo sacs, gametogenesis, pollen grains

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