微孔草叶细胞冻害研究  

A STUDY OF COLD INJURY ON MICROULA LEAF CELL

作　　者：王钦[1] 尚可政[2] 程为麟 

机构地区：[1]甘肃省草原生态研究所 [2]兰州大学大气科学系 [3]甘肃省教育学院数学系

出　　处：《草业科学》1998年第3期23-26,31,共5页Pratacultural Science

基　　金：甘肃省自然科学基金

摘　　要：针对微孔草常因低温环境而受到冻害，造成产量下降的问题，用电导法测其渗出液的电导率，计算渗出电解质百分率即细胞伤害率并配以Ｌｏｇｉｓｔｉｃ方程求其拐点温度及半致死温度的定量范围，以确定其抗寒能力。结果表明，微孔草叶组织在０．５ｈ低温处理的半致死温度是－１０．７９℃，１．０ｈ处理是－７．０１℃，１．５ｈ处理是－１．６８℃。由此认为，微孔草是中等抗寒植物，测量渗出液的电导率是一种定量估计冻害的好方法。icroula is often injured under low temperature, thus resulted in reduced yield. In this experiment, electrical conductance method was used to test the conductance ratio of the exudate. The percentage of electrolyte, i.e. cold injury rate of cells, was calculated. The Logistic function was used to determine the inflection temperature and the range of semi lethal temperature to find its cold resistance. The result indicated that, under 0.5 h low temperature, semi lethal temperature of Microula was -10.79 ℃, -7.01 ℃ under 1.0 h treatment and -1.68 ℃ under 1.5 h. Thus, Microula could be classified into midium cold resistance plant.

关 键 词：微孔草 冻害 细胞 电导法 渗出液 

分 类 号：S432.34[农业科学—植物病理学]