生物技术通报 ›› 2024, Vol. 40 ›› Issue (8): 1-12.doi: 10.13560/j.cnki.biotech.bull.1985.2024-0234

• 综述与专论 •    下一篇

光信号和昼夜节律调控植物感知冷胁迫的研究进展

李文萃(), 彭羽佳, 刘勇波()   

  1. 中国环境科学研究院 国家环境保护区域生态过程与功能评估重点实验室,北京 100012
  • 收稿日期:2024-03-10 出版日期:2024-08-26 发布日期:2024-09-05
  • 通讯作者: 刘勇波,男,博士,研究员,研究方向:生物多样性与生物安全;E-mail: liuyb@craes.org.cn
  • 作者简介:李文萃,女,硕士研究生,研究方向:生物多样性与生物安全;E-mail: 2796057166@qq.com
  • 基金资助:
    国家自然科学基金项目(31200288)

Research Progress in Light Signal and Circadian Rhythm Regulating the Perception of Plants to Cold Stress

LI Wen-cui(), PENG Yu-jia, LIU Yong-bo()   

  1. State Environment Protection Key Laboratory of Regional Ecological Process and Functional Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012
  • Received:2024-03-10 Published:2024-08-26 Online:2024-09-05

摘要:

温度和光是调节植物生长发育的重要环境因子,植物感知温度变化并通过改变基因表达模式等响应低温环境,这些响应受到光信号和昼夜节律等因素的影响。然而,光信号诱导昼夜节律调控植物响应冷胁迫的分子调控网络尚不清楚。本文聚焦光信号和昼夜节律在植物感知冷胁迫中的作用。光信号参与冷胁迫主要通过光敏色素诱导CBF基因途径激活冷基因的表达,这主要有两种途径,一是光敏色素受体通过直接调控CBFCOR基因表达而调节植株抗冷性;二是光依赖性信号转导的正调控因子HY5激活冷驯化COR基因。昼夜节律参与冷胁迫主要是通过昼夜节律的组分CCA1/LHY和RVE4/RVE8介导DREB1下游基因在冷胁迫下的表达。明确植物中光信号和昼夜节律在冷信号感知及传导途径中的作用,不仅有助于更好地理解植物抗冷的机制和功能,还有助于植物生长与温度胁迫反应之间的权衡,为提升植物应对昼夜温差变化提供理论基础。

关键词: 冷感知, 抗冷基因, 光信号, 昼夜节律

Abstract:

Temperature and light are important environmental factors in regulating plant growth and development, and plants perceive temperature changes and respond to cold stress by altering gene expression patterns and other responses. The responses are affected by light signal and circadian rhythms. However, the molecular regulatory networks involved in plant response to cold stress are not well understood. This review focuses the roles of light signal and circadian rhythms in the perception of plants to cold stress. Light signal is involved in cold stress mainly through photopigment-induced CBF gene pathways to activate the expressions of cold genes. It includes two main pathways: one is that photosensitive pigments directly regulate cold tolerance by modulating CBF and COR gene expression; the other is the activation of CORCOLD REGULATED)genes by HY5, a positive regulator factor. Circadian rhythms are involved in cold stress mainly through their components, CCA1/LHY and RVE4/RVE8, regulating the expression of DREB1 downstream gene. Clarifying the roles of light signal and circadian rhythms in cold perception and conduction pathways not only contributes to a better understanding of the mechanisms of cold resistance in plants, but also helps in the trade-offs between plant growth and stress responses. It provides a theoretical basis for enhancing the response sensitivities of plants to diurnal and nocturnal temperature variations.

Key words: cold perception, cold resistance genes, light signal, circadian rhythm