甜蜜的相遇—营养与激素信号协同调节植物生长的新机制
收稿日期: 2021-02-24
录用日期: 2021-02-26
网络出版日期: 2021-03-03
基金资助
国家自然科学基金(31970308);国家自然科学基金重大研究计划(91740203)
A Sweet Meet—New Mechanism on Nutrient and Hormone Regulation of Plant Growth
Received date: 2021-02-24
Accepted date: 2021-02-26
Online published: 2021-03-03
为应对持续不断的环境压力和逆境胁迫, 植物需要整合内部和外部信息来调整自身的生长发育, 以适应环境。其中, 可溶性糖不仅是基础能量和营养代谢的必需分子, 也是参与植物生长发育和应对胁迫的信号分子。然而, 植物整合糖信号, 平衡营养代谢和胁迫应答的分子机制尚不清楚。最近, 福建农林大学熊延团队发现, 居于植物营养感受通路中心地位的TOR激酶能够直接磷酸化乙烯信号核心组分EIN2蛋白, 形成1个葡萄糖-TOR-EIN2的营养感受和调控轴心。植物通过不同的蛋白激酶(TOR和CTR1)精确调控EIN2不同位点的磷酸化, 从而使EIN2成为葡萄糖信号和乙烯信号的交叉中心, 精巧地调节植物的生长发育。
温兴, 晋莲, 郭红卫 . 甜蜜的相遇—营养与激素信号协同调节植物生长的新机制[J]. 植物学报, 2021 , 56(2) : 138 -141 . DOI: 10.11983/CBB21040
Continuously exposed to a variety of environmental stresses, plants need to integrate internal and external information in order to achieve the purpose of adaption to environment. Among this process the perception and regulation of the energy state and soluble sugar level are of great importance. However, the molecular mechanisms underlying the integration of sugar signaling, nutrient metabolism and stress response in plants remain unclear. Recently, a team led by Prof. Yan Xiong from Fujian Agriculture and Forestry University (FAFU) have discovered that TOR kinase, the central player in metabolic signaling pathways, can directly bind and phosphorylate the core component of ethylene signaling EIN2 protein, forming a regulatory axis to coordinate TOR and ethylene signaling. The two kinases TOR and CTR1 precisely regulates distinct phosphorylation sites on EIN2, respectively, which makes EIN2 become a coordination hub of glucose signal and ethylene signal, and precisely control plant growth and development.
Key words： glucose; ethylene; TOR; EIN2; phosphorylation
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