摘要
试验分别采用0(对照,CK)、50、75和100mg/L4个浓度的壳聚糖(CTS)处理一叶一心的黄瓜幼苗,喷施一次CTS溶液,进行白天/夜间温度(45℃/40℃)的高温处理4d,并每隔24h喷一次CTS溶液,以研究CTS对黄瓜幼苗抗热性的影响。结果表明,CTS处理可以提高高温胁迫下黄瓜叶片超氧化歧化酶(SOD)、过氧化物酶(POD)、过氧化氢酶(CAT)和抗坏血酸过氧化物酶(APX)的活性,有效降低O2-产生速率。表明适宜浓度的CTS具有增强活性氧清除能力,降低细胞膜脂过氧化水平和膜透性增加的程度,保护生物膜功能,提高黄瓜幼苗抗高温的作用。
In order to study influence of chitosan on heat tolerance of the cucumber seedlings, chitosan at 0（CK）、50、75 and 100 mg/L was sprayed on cucumber seedlings on one leaves stage respectively, and the cucumber seedlings were stressed under high temperature at 45℃ in daytime while 40℃,in night for 4 d, and the seedlings were sprayed every 24 h. Results showed that chitosan could increase the activity of superoxide dismutase（SOD）, peroxidase（POD）, catalase（CAT） as well as ascorbic acid peroxidase （APX）, decrease O-2production rate. The study indicated that chitosan at proper concentrations was capable of improving the ability to eliminate reactive oxygen species, reducing cell peroxidation and membrane permeability, protecting the functions of bio-membrane, raising the heat tolerance of cucumber seedlings.
出处
《北方园艺》
CAS
北大核心
2007年第8期7-9,共3页
Northern Horticulture
关键词
壳聚糖
黄瓜
抗热性
Chitosan
Cucumber（Cucumis sativus L.）
Heat tolerance
