被子植物开花时间和花器官发育的表观遗传调控研究进展

成花转换是被子植物生活周期中的关键发育过程，植物通过调控基因表达模式而整合多条内外开花信号实现成花诱导。近几十年来，学者们为阐释植物成花转换的分子机制做了大量的分子遗传学研究。其中，影响植物生长发育的表观遗传修饰是调控成花转换过程的重要分子机制之一。表观遗传调控是植物在适宜环境条件下实现开花诱导和花器官发育的决定性因素。综述了有关开花时间和花器官发育的表观遗传学研究进展，包括染色质重塑、组蛋白甲基化和miRNAs。

Epigenetic Research Progress on Flowering Time and Flower Organ Development in Angiosperms

The floral transition is a critical developmental process in angiosperms life cycle. Plants integrate multiple endogenous and environmental signals through gene expression pattern changes to result in flowering. Over the past few decades，extensive molecular genetic studies have elucidated the molecular mechanisms governing the floral transition. One key molecular mechanism for this transition involves epigenetic modifications that affect a number of aspects of plant growth and development. Epigenetic control is determinative in plants for coordinating the switch to flowering under favorable internal and external conditions and achieving reproductive success. In this review，research progress on the epigenetic regulation associated with flowering time and floral organ development. These epigenetic modifications include chromatin remodeling，histone methylation，and the miRNAs that mediate epigenetic modifications.