冷季型草坪草耐热性研究综述

A review on heat tolerance of cool season turf grasses

冷季型草坪草营养器官适宜的生长温度为 10～ 2 4℃。超出生长最适温度的高温使草坪草植株的生理代谢发生一系列的变化 ,例如 :细胞膜透性增大 ,一些对高温敏感的酶活性下降 ,代谢失去平衡 ,生长延缓 ,叶色退绿 ,甚至植株死亡。适度的热锻炼和适当的水、肥、修剪等管理有利于提高草坪草的耐热性。对化学物质的耐性调控和热胁迫信号转导等方面的研究 。

The optimum temperature for vegetative growth of cool season grasses is 10～24 ℃. Temperatures above this range will cause changes in plant metabolism, e.g. increase permeability of cell membrane, destroy some heatsensitive enzymes and bring about imbalance to some metabolic processes, resulting in inhibition of plant growth, even in death of the grasses. Heat hardiness and adequate irrigation, fertilisation and mowing can help improve heat tolerance of cool season turf grasses. Further studies should be made in the areas of chemical regulation of heat tolerance and signal transduction of heat stress in plants for more information about improving turf quality during mid summer in climatic transition zones of China.