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植物染色体通过Brachypodium的晚上复合体传递光周期信息

Mingjun Gao^1,2, Yunlong Lu³, Feng Geng¹

¹Sainsbury Laboratory, University of Cambridge, 47 Bateman St., Cambridge, CB2 1LR, UK.

|November 8, 2023

概括

植物染色体C (PHYC) 在Brachypodium distachyon中充当分子计时器,通过EARLY FLOWERING3 (ELF3) 向昼夜时钟发出夜间长度信号,以调节开花时间.

科学领域:

植物生物学植物生物学
分子遗传学分子遗传学
循环节律是指循环节律的节奏.

背景情况:

日长对植物来说是一个关键的季节性提示,影响了诸如开花时间之类的适应性特征.
谷物中的光周期反应对于适应不同度至关重要.
光周期感应和单虫的整合机制尚不清楚.

研究的目的:

为了阐明植物染色体C (PHYC) 和早期开花3 (ELF3) 在调节Brachypodium distachyon中开花时间中的作用.
了解这些基因如何相互作用,以感知和响应日长线索.

主要方法:

对Brachypodium distachyon突变物的遗传分析.
转录组分析.
蛋白质复合体分析.

主要成果:

植物染色体C (PHYC) 对于开花至关重要.
早期开花3 (ELF3) 作为一种花抑制剂,其突变体表现出构成性的长日表型.
PHYC和ELF3形成一个复合体,ELF3与PHOTOPERIOD1 (PPD1) 这样的开花调节器结合在一起.
过度表达PPD1会加速开花,而PPD1是长日引起的快速开花所必需的.

结论:

PHYC作为分子计时器,通过ELF3.3将夜间信息传递到昼夜时钟.
这种相互作用调节了花期的时间,以应对季节性光线线索.

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