草业科学2011，Vol.28Issue(11)：1909-1914,6.
5种冷季型草坪草的耐热性研究
A study on heat tolerance of five cool-season turfgrasses
摘要
Abstract
The experiment was conducted to investigate heat tolerance of me five kinds of cool-season grasses, including Festuca arundinacea , Lolium perenne ,Agrostis stoloni f era , Poa pratensis and P. trivialis, through analyzing apparent indexes： green leaf numher/plant and growth height; and physiologicalbiochemical indexes; relative water content, relative electric conductivity, chlorophyll content, SOD activi- ty, CAT activity and POD activity, in artificial climatic chamber with high temperature （35 ℃/30 ℃, day/night） and high humidity （75%）. The result showed that at high temperature （day/night, 35 ℃/30 ℃）, the relative water content of five grasses decreased; and the relative electric conductivity of five grasses increased with threatened time increasing. The change of leaf chlorophyll content of five grasses was not consistence. The chlorophyll content of F. arundinacea, L. perenne and P. pratensis showed increased at first and then decreased; and the chlorophyll content of other two species decreased all the time. The SOD and POD activities of five grasses increased firstly and then decreased. CAT activity decreased all the time. The green leaf number/plant and plant growth height of five grasses decreased with threatened time increasing. The five grasses were classified three groups by a cluster analysis. The first group （heat tolerance） was F. arundinacea; the second group （moderate heat tolerance） were P. pratensis, L. perenne and A. stolonifera; and the third group （sensitive to heat） was P. trivialis.关键词
冷季型草坪草/耐热性/外观指标/生理生化指标Key words
cool-season grasses heat tolerance/apparent index/physiological-biochemical index分类
农业科技引用本文复制引用
孙彦,张芸芸..5种冷季型草坪草的耐热性研究[J].草业科学,2011,28(11):1909-1914,6.基金项目
国家“十一五”科技支撑计划 （）
