生物技术通报2025，Vol.41Issue(3)：181-189,9.DOI:10.13560/j.cnki.biotech.bull.1985.2024-0635
不同浓度褪黑素处理对高温胁迫下草莓苗生理特性的影响
Effects of Different Concentrations of Melatonin on the Physiological Characteristics of Strawberry Seedlings under High-temperature Stress
摘要
Abstract
[Objective]The impacts of different concentrations of melatonin treatments on the growth and physiological characteristics of strawberry seedlings under high-temperature stress were investigated to establish a theoretical foundation for the advancement of heat-resistant cultivation technology for strawberries.[Method]'Hongyan'strawberry seedlings were subjected to different concentrations of melatonin via root irrigation and foliar spraying to examine the effects of exogenous melatonin treatments on the growth and physiological characteristics of strawberry seedlings under high-temperature stress.[Result]The growth of strawberry seedlings was constrained under high temperature stress.However,melatonin treatment alleviated the growth inhibition of strawberry seedlings under high-temperature stress compared to the control.Key parameters such as net photosynthesis rate,transpiration rate,and stomatal conductance of strawberry seedlings showed significant increases.Additionally,the activities of antioxidant enzymes(SOD,POD,and CAT)and proline content were significantly elevated,while hydrogen peroxide content,superoxide anion radical production,relative conductivity and MDA content were notably reduced,with the most pronounced effects observed with a 400 μmoL/L treatment.[Conclusion]Under high-temperature stress,a 400 μmoL/L melatonin treatment improved the ability of strawberry seedlings to withstand heat-induced adversity by enhancing photosynthetic efficiency,boosting antioxidant enzyme activities,maintaining cell membrane stability,and reducing the accumulation of harmful substances.关键词
草莓苗/高温胁迫/褪黑素/光合参数/生理特性Key words
strawberry seedlings/high-temperature stress/melatonin/photosynthesis parameters/physiological characteristics引用本文复制引用
吴夏明,杨敏,周陈平,邝瑞彬,刘传和,贺涵,徐泽,魏岳荣..不同浓度褪黑素处理对高温胁迫下草莓苗生理特性的影响[J].生物技术通报,2025,41(3):181-189,9.基金项目
广东省农业科学院果树研究所自主培育项目(2023001),2023年广东省乡村振兴战略专项(2023-NBH-00-013),国家自然科学基金青年基金项目(32002018) （2023001）
