Li Ning, Euring Dejuan, Cha Joon Yung, Lin Zeng, Lu Mengzhu, Huang Li-Jun, Kim Woe Yeon
State Key Laboratory of Cultivation and Protection for Non-Wood Forest Trees, College of Forestry, Central South University of Forestry and Technology, Hunan, China.
Forest Botany and Tree Physiology, University of Göttingen, Göttingen, Germany.
Front Plant Sci. 2021 Feb 11;11:627969. doi: 10.3389/fpls.2020.627969. eCollection 2020.
Agriculture is largely dependent on climate and is highly vulnerable to climate change. The global mean surface temperatures are increasing due to global climate change. Temperature beyond the physiological optimum for growth induces heat stress in plants causing detrimental and irreversible damage to plant development, growth, as well as productivity. Plants have evolved adaptive mechanisms in response to heat stress. The classical plant hormones, such as auxin, abscisic acid (ABA), brassinosteroids (BRs), cytokinin (CK), salicylic acid (SA), jasmonate (JA), and ethylene (ET), integrate environmental stimuli and endogenous signals to regulate plant defensive response to various abiotic stresses, including heat. Exogenous applications of those hormones prior or parallel to heat stress render plants more thermotolerant. In this review, we summarized the recent progress and current understanding of the roles of those phytohormones in defending plants against heat stress and the underlying signal transduction pathways. We also discussed the implication of the basic knowledge of hormone-regulated plant heat responsive mechanism to develop heat-resilient plants as an effective and efficient way to cope with global warming.
农业在很大程度上依赖气候，并且极易受到气候变化的影响。由于全球气候变化，全球平均地表温度正在上升。超出植物生长生理最适温度的温度会诱导植物产生热应激，对植物的发育、生长以及生产力造成有害且不可逆转的损害。植物已经进化出应对热应激的适应性机制。经典的植物激素，如生长素、脱落酸（ABA）、油菜素甾醇（BRs）、细胞分裂素（CK）、水杨酸（SA）、茉莉酸（JA）和乙烯（ET），整合环境刺激和内源信号，以调节植物对包括热胁迫在内的各种非生物胁迫的防御反应。在热胁迫之前或同时外源施用这些激素可使植物具有更高的耐热性。在这篇综述中，我们总结了这些植物激素在保护植物免受热胁迫方面的作用以及潜在信号转导途径的最新进展和当前认识。我们还讨论了激素调节植物热响应机制的基础知识对于培育耐热植物的意义，这是应对全球变暖的一种有效方式。
