低温对玉米幼苗细胞保护酶活性及胞质质量参数的影响  

The Effect of Low Temperature on Activities of Cell Protective Enzymes and Protoplasmic Parameters in Leaves of Zea mays

作　　者：张敬贤[1] 李俊明[1] 崔四平[1] 魏建昆[1] 张海明[2] 耿庆汉 

机构地区：[1]河北省农林科学院理化所,石家庄050051 [2]内蒙古农牧学院,呼和浩特010018

出　　处：《华北农学报》1993年第3期9-12,共4页Acta Agriculturae Boreali-Sinica

基　　金：农业部和国家自然科学基金资助项目

摘　　要：用4℃低温处理玉米白交系幼苗二天发现细胞保护酶活性和胞质质量发生有规律的变化:抗冷力弱的自交系过氧化氢酶、过氧化物酶、超氧物歧化酶活性降低,原生质层透性亦降低,但膜脂过氧化水平显著增高;抗冷力强的自交系细胞保护酶活性增高,膜脂过氧化水平未发生明显变化,但原生质层透性和和滞度显著增加.这一结果表明保护酶活性和胞质质量与玉米抗冷性密切相关.After two days of 4℃ treatment at three-leaf stage, the activities of eatalasc, pcroxidase and supcroxidc dismutasc, and permeability of protoplast layer to nonclcctrotes declined, but level of membrane lipid pcroxidation increased in the leaves of cold sensitive inbred line of maize. In the cold resistant line, by contrast, the activities of the three protective enzymes, and permeability and viscosity of protoplast increased, and correspondingly, membrane lipid pcroxidation had no significant change. The results suggested that there ight be a close relationship between the activities of enzymes investigated or protoplasmic parameters and cold resistance of maize.

关 键 词：低温 玉米 自交系 保护酶 胞质质量 

分 类 号：S513.01[农业科学—作物学]