西南林业大学学报2012，Vol.32Issue(4)：6-11,6.DOI:10.3969/j.issn.2095-1914.2012.04.002
用膜透性、SOD酶活性和膜脂肪酸成分探讨林木抗寒性
Cold-Resistance Assessment of Eucalyptus dunnii by SOD Enzyme Activity, Membrane Permeability and Membrane-Fat Acid Content
摘要
Abstract
The composition of membrane-fat acid, the activity of SOD enzyme and membrane permeability in the leaves of different elite Eucalyptus dunnii were analyzed to study the cold resistance characteristics of the different elite individuals. The results indicated that the index of unsaturated fatty acid( IUFA) could be adopted to evaluate the cold resistance of the individuals, whose IUFA index varied between 187. 02 - 231. 68 among the different elite Eucalyptus dunnii plants. Treated by the low temperature stress, the activity of SOD enzyme rose with the increasing stress of low-temperature before the inflexion and then dropped sharply after the inflexion. The membrane permeability increased quickly along with the low-temperature stress intensified before the inflexion and increased slowly after the inflexion. The weaker the cold-resistance was, the earlier the inflexion occurred. The study with different physiological indexes showed that the inflexion value of the SOD enzyme activity was in accordance with the membrane permeability. It was proposed that the lowest temperature with which the inflexion occurred for SOD enzyme activity could be taken as the threshold of cold-resistance for different elite Eucalyptus dunnii individuals.关键词
邓恩桉/SOD/膜透性/膜脂肪酸/抗寒性Key words
Eucalyptus dunnii/ SOD/ membrane permeability/ membrane-fat acid/ cold-resistance分类
农业科技引用本文复制引用
郭祥泉..用膜透性、SOD酶活性和膜脂肪酸成分探讨林木抗寒性[J].西南林业大学学报,2012,32(4):6-11,6.基金项目
福建省财政厅重大专项基金资助. （）
