SnRK1调控植物碳氮代谢的研究进展  

Research advances on SnRK1 regulating carbon and nitrogen metabolism in plants

作　　者：韩超 白明义 HAN Chao;BAI Ming-yi(The Key Laboratory of Plant Development and Environmental Adaptation Biology,Ministry of Education,School of Life Sciences,Shandong University,Qingdao 266237,China)

机构地区：[1]山东大学生命科学学院/植物发育与环境适应生物学教育部重点实验室,山东青岛266237

出　　处：《广州大学学报（自然科学版）》2024年第2期1-12,共12页Journal of Guangzhou University:Natural Science Edition

摘　　要：植物无法移动的生活方式决定了其具有很强的环境适应性,因此,植物需要不断调控自身代谢以适应不同的光照环境。植物细胞中保守的蛋白激酶蔗糖非发酵1相关蛋白激酶1(SnRK1)能够响应植物体内的能量胁迫,调控一系列碳氮代谢的生物化学反应来适应能量逆境。文章系统梳理了SnRK1在能量胁迫条件下通过转录调控和翻译后磷酸化修饰调控的代谢通路,分析了SnRK1调控碳氮代谢的一般规律,包括:(1)SnRK1抑制蔗糖合成和光合速率;(2)SnRK1抑制氮同化与氮信号转导,协同碳氮平衡;(3)SnRK1促进糖异生维持糖代谢稳态;(4)SnRK1促进细胞自噬和氨基酸氧化代谢。研究结果表明,SnRK1是植物碳氮代谢调控的核心调控元件,对作物中的SnRK1功能解析具有重要借鉴意义。The immobile lifestyle of plants determines their strong environmental adaptability.Therefore,plants need to continuously modulate their metabolism to adapt to different light conditions.Sucrose non-fermenting 1-related protein kinase 1(SnRK1)in plant cells can be activated by energy stress in plants,regulating a series of biochemical reactions of carbon and nitrogen metabolism to adapt to energy stress.This review systematically summarizes the metabolic pathways regulated by SnRKl under energy stress conditions through transcriptional regulation and post-translational phosphorylation modification,and concludes the general rules of SnRK1 function for carbon and nitrogen metabolism,including SnRK1 inhibits sucrose synthesis and photosynthetic efficiency;SnRK1 represses nitrogen assimilation and nitrogen signal transduction,coordinating a carbon and nitrogen balance;SnRK1 promotes gluconeogenesis to maintain sugar metabolism homeostasis;as well as,SnRK1 promotes autophagy and amino acid oxidation metabolism.These summarized results indicate that SnRK1 is the core regulatory element of plant carbon and nitrogen metabolism regulation,which will be a useful reference for functional analysis of SnRKl in crops.

关 键 词：SnRK1 碳氮代谢 氮同化 

分 类 号：Q945[生物学—植物学]