Response mechanism of water status and photosynthetic characteristics of Cotoneaster multiflorus under drought stress and rehydrated conditions

作者：Qiuliang Huang, Miaomiao Zhang, Changshun Li, Boyang Li, Sheng-lan Zhuo, Yushan Yang, Yu-da Chen, A Zhong, Haoyang Liu, Wenfeng Lai, Zhen-bei Huang, Minghui Cao, Zongsheng Yuan, Guofang Zhang · 发表于：Frontiers in Plant Science · 年份：2025 · DOI：10.3389/fpls.2024.1457955 · 被引用次数：9 · 研究领域：Plant Water Relations and Carbon Dynamics、Plant Stress Responses and Tolerance、Plant responses to water stress

Introduction Plant physiology response and adaptation to drought stress has become a hotspot in plant ecology and evolution. Cotoneaster multiflorus possesses high ecological, ornamental and economic benefits. It has large root system and tolerance to cold, drought and poor soil. Therefore, C. multiflorus is considered as one of the most important tree species for ecological restoration in arid and semi-arid areas. However, little is known about the physiological mechanisms, molecular mechanisms and drought strategies of how C. multiflorus responds to drought stress. Therefore, exploring the physiological response mechanisms, molecular mechanisms and adaptive strategies of C. multiflorus in response to drought is important for its growth in arid and semi-arid regions. Methods We investigated the response and coupling mechanisms of water status, photosynthetic properties and chloroplast fluorescence parameters in C. multiflorus in response to drought and rehydrated after drought, especially the importance of nocturnal sap flow and nocturnal water refilling to maintain its own water balance in response to drought stress. In addition, we studied the stress response of C. multiflorus transcriptome factors, and we also discussed drought adaptation strategies of C. multiflorus . Results C. multiflorus adapted to drought stress by a series of structural and physiological mechanisms, such as promoting closing stomata, increasing nocturnal sap flow. When rehydrated after undergoing se...