Exogenous diethyl aminoethyl hexanoate alleviates the damage caused by low-temperature stress in Phaseolus vulgaris L. seedlings through photosynthetic and antioxidant systems

作者：Yu Bai, Qiya Dai, Yuanhuizi He, Yan Li, Jianpo Niu, Xuan Wang, Yongdong Xie, Xuena Yu, Wen Tang, Huanxiu Li, Zhi Huang, Bo Sun, Guochao Sun, Xun Wang, Yi Tang · 发表于：BMC Plant Biology · 年份：2025 · DOI：10.1186/s12870-025-06083-y · 被引用次数：11 · 研究领域：Plant Stress Responses and Tolerance、Plant responses to water stress、Plant responses to elevated CO2

BACKGROUND: Phaseolus vulgaris is a warm-season crop sensitive to low temperatures, which can adversely affect its growth, yield, and market value. Exogenous growth regulators, such as diethyl aminoethyl hexanoate (DA-6), have shown potential in alleviating stress caused by adverse environmental conditions. However, the effects that DA-6 has on P. vulgaris plants subjected to low-temperature stress are not well understood. This study aimed to investigate the impact DA-6 has on the growth, photosynthesis, antioxidant system, and gene expression in cold-tolerant (YJ009763) and cold-sensitive (Baibulao) P. vulgaris seedlings under low-temperature stress. RESULTS: To simulate low-temperature stress, P. vulgaris seedlings were exposed to 5 °C, and 25 mg/L DA-6 solution applied to their leaves. This study revealed that DA-6 significantly enhanced the growth and photosynthetic performance of P. vulgaris seedlings under low-temperature stress. Specifically, DA-6 increased chlorophyll content and photosynthetic rates, reducing stomatal limitation and enhancing carbon assimilation. It also improved the photosynthetic efficiency by boosting electron transport in the reaction center. The antioxidant enzyme activities of superoxide dismutase (SOD), peroxidase (POD), and catalase (CAT) were markedly increased following DA-6 treatment. After 24 h of low-temperature stress, the cold-tolerant seedlings showed a 68.95% increase in POD activity, whereas the cold-sensitive seedlings displayed a ...