冷季型草坪草对高温胁迫的生理生态适应机理研究进展

高温是制约草坪草(尤其是冷季型草坪草)生长的重要生态因子之一。然而,草坪草本身都具有一定的耐热性,特别是通过其体内的一些生理和生化机制能够抵御和适应一定程度和时间的热胁迫,比如通过植物体内细胞膜膜脂组分的变化、抗氧化系统对氧自由基的清除、热激蛋白的合成以及一些其它物质代谢的渗透调节以获得耐热性,从而缓减高温对其的伤害。本文结合作者数年的研究成果,就这两个方面综述了国内外的研究进展并提出了目前有关这些方面研究的不足以及今后研究的重点,以便为揭示冷季型草坪草在夏季所受高温伤害机理以及热适应机理提供科学的理论依据和实践指导。

Research advances in mechanisms of physiological-ecological adaptation of cool-season turfgrass under high temperature stress

High temperature is one of the important ecological factors limiting the growth and development of cool-season turfgrass,especially during hot summer in transitional and warm climatic areas.Fortunately,this type of turfgrass exhibits some physiological and ecological adaptation mechanisms,e.g.,the change of membrane lipid component,elimination of active oxidative species(AOS) by antioxidant systems,and accumulation of heat shock protein(HSP),for acquiring heat tolerance to protect itself against the damage by heat stress.Based on our several years researches and the literatures published at home and abroad about cool-season turfgrass under heat stress,this paper summarized and discussed the physiological-ecological adaptation mechanisms of cool-season turfgrass under high temperature stress,which could be helpful to provide academic and practical evidences in improving the thermo-tolerance of cool-season turfgrass.