森林与环境学报2017，Vol.37Issue(4)：405-411,7.DOI:10.13324/j.cnki.jfcf.2017.04.004
4个杜鹃品种的抗旱性比较及生理响应
Drought resistance difference and physiological response of 4 Rhododendron cultivars
摘要
Abstract
The experiment was conducted to study the morphological and physiological of 4 cultivars of 5-year-old Rhododendron under different drought stress. The results of drought damage index showed that the order of drought resistance from strong to weak was'Guoqihong'>'Yuhudie'>'Daqinglian'>'Yanzhimi' . With the drought stress increase, the relative water content of Rhododendron decrease significantly ( P<0. 05) while Malondialdehyde ( MDA) content and relative conductivity had a upward trend; Catalase (CAT) activity and soluble sugar showed different results due to various cultivars. The CAT activity of 'Guoqihong', 'Daqinglian' and 'Yanzhimi' decreased under the severe drought stress which was related to the plants have reached the limit drought stress and the ability of scavenging oxygen free radicals become decrease. Correlation analysis and principal component analysis showed that CAT, soluble sugar, MDA, relative conductivity and relative water content were closely related with drought resistance of Rhododendron. Drought resistance of 4 Rhododendron cultivars from strong to weak, evaluated by the method of membership function, were'Guoqihong'>'Yuhudie'>'Daqinglian'>'Yanzhimi' which was consistent with drought damage index.关键词
杜鹃/抗旱性/生理响应/主成分分析/隶属函数法Key words
Rhododendron/drought resistance/physiological response/principal component analysis/membership function method分类
生物科学引用本文复制引用
胡肖肖,金荷仙,庄晓林,唐宇力,段玉侠..4个杜鹃品种的抗旱性比较及生理响应[J].森林与环境学报,2017,37(4):405-411,7.基金项目
国家自然科学基金重点项目(51338007) （51338007）
杭州西湖风景名胜区(市园文局)科研计划项目 (2014-005) （市园文局）
校人才启动基金项目(2014FR080). （2014FR080）
