Epigenetic control of cell specification during female gametogenesis

被引:23
作者
Armenta-Medina, Alma [1 ,2 ]
Demesa-Arevalo, Edgar [1 ,2 ]
Vielle-Calzada, Jean-Philippe [1 ,2 ]
机构
[1] CINVESTAV, Grp Desarrollo Reprod & Apomixis, Lab Nacl Genom Biodiversidad, Irapuato, Mexico
[2] CINVESTAV, Dept Ingn Genet Plantas, Irapuato, Mexico
来源
SEXUAL PLANT REPRODUCTION | 2011年 / 24卷 / 02期
关键词
Apomixis; ARGONAUTE; Gamete specification; Gametogenesis; sRNA; DNA METHYLATION; SMALL RNAS; GAMETE FORMATION; EMBRYO SAC; GENE; ARABIDOPSIS; MEIOSIS; PLANT; APOMIXIS; PATHWAY;
D O I
10.1007/s00497-011-0166-z
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
In flowering plants, the formation of gametes depends on the differentiation of cellular precursors that divide meiotically before giving rise to a multicellular gametophyte. The establishment of this gametophytic phase presents an opportunity for natural selection to act on the haploid plant genome by means of epigenetic mechanisms that ensure a tight regulation of plant reproductive development. Despite this early acting selective pressure, there are numerous examples of naturally occurring developmental alternatives that suggest a flexible regulatory control of cell specification and subsequent gamete formation in flowering plants. In this review, we discuss recent findings indicating that epigenetic mechanisms related to the activity of small RNA pathways prevailing during ovule formation play an essential role in cell specification and genome integrity. We also compare these findings to small RNA pathways acting during gametogenesis in animals and discuss their implications for the understanding of the mechanisms that control the establishment of the female gametophytic lineage during both sexual reproduction and apomixis.
引用
收藏
页码:137 / 147
页数:11
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