Xu Mengyun, Yang Qinwen, Bai Genxiang, Li Ping, Yan Jian
Key Laboratory of Agro-Environment in the Tropics, Ministry of Agriculture and Rural Affairs, South China Agricultural University, Guangzhou, China.
Guangdong Provincial Key Laboratory of Eco-Circular Agriculture, South China Agricultural University, Guangzhou, China.
Front Plant Sci. 2022 Oct 20;13:1035414. doi: 10.3389/fpls.2022.1035414. eCollection 2022.
Low temperatures are among the most commonly encountered environmental conditions that adversely affect plant growth and development, leading to substantial reductions in crop productivity. Plants have accordingly evolved coordinated mechanisms that confer low-temperature adaptation and resistance. The plant metabolic network, including polyamines (PAs) and γ-aminobutyric acid (GABA) is reprogrammed to ensure that essential metabolic homeostasis is maintained in response to cold stress conditions. Additionally, GABA might serve as a central molecule in the defense system during low-temperature tolerance in plants. However, our understanding of how these metabolites function in conferring cold tolerance is still far from complete. Here, we summarized how PAs and GABA function in conferring cold tolerance, and describe the crucial role of GABA in the mitigation of ROS during cold stress in plants.
低温是最常见的不利影响植物生长发育的环境条件之一，会导致作物产量大幅下降。因此，植物进化出了协调机制来实现低温适应和抗性。包括多胺（PAs）和γ-氨基丁酸（GABA）在内的植物代谢网络会重新编程，以确保在冷胁迫条件下维持基本的代谢稳态。此外，GABA可能在植物低温耐受期间的防御系统中充当核心分子。然而，我们对这些代谢物在赋予耐寒性方面如何发挥作用的理解仍远未完善。在此，我们总结了PAs和GABA在赋予耐寒性方面的作用方式，并描述了GABA在减轻植物冷胁迫期间活性氧方面的关键作用。
