Regulation of shoot meristem shape by photoperiodic signaling and phytohormones during floral induction of Arabidopsis

第一作者：Atsuko Kinoshita

第一单位：东京都立大学

通讯作者：George Coupland

 Abstract 

背景回顾：Floral transition, the onset of plant reproduction, involves changes in shape and identity of the shoot apical meristem (SAM).

提出问题：The change in shape, termed doming, occurs early during floral transition when it is induced by environmental cues such as changes in day-length, but how it is regulated at the cellular level is unknown.

主要研究：We defined the morphological and cellular features of the SAM during floral transition of Arabidopsis thaliana.

结果1-形态变化与开花信号：Both cell number and size increased during doming, and these changes were partially controlled by the gene regulatory network (GRN) that triggers flowering.

结果2-赤霉素：Furthermore, dynamic modulation of expression of gibberellin biosynthesis and catabolism enzymes at the SAM contributed to doming. Expression of these enzymes was regulated by two MADS-domain transcription factors implicated in flowering.

结论：We provide a temporal and spatial framework for integrating the flowering GRN with cellular changes at the SAM, and highlight the role of local regulation of gibberellin.

 通讯作者 

doi: https://doi.org/10.7554/eLife.60661

Journal: eLife

Published date: Dec 14, 2020