北京林业大学学报2017，Vol.39Issue(10)：24-32,9.DOI:10.13332/j.1000-1522.20170323
白杨派无性系苗期耐盐性综合评价及筛选
Comprehensive evaluation and screening of salt tolerance for Leuce clones at nursery stage
摘要
Abstract
Ten white poplar clones were used as the materials in this study to analyse the changes of growth and physiological indexes under different salt stresses ( 0 , 0. 1％, 0. 3％, 0. 5％ and 0. 7％ NaCl concentration) . The results showed that the height growth rate and the basal diameter growth rate of ten white poplar clones were inhibited apparently under high salt stress ( P<0. 05 ) . Clone 0057 showed fast-growing performance and high survival rate. The effects of low salt stress on the growth and cell membrane system of clones were not obvious, but it could induce the increase of antioxidant enzyme ( SOD and POD) activity and soluble protein content. With the increase of NaCl concentration and the extension of salt treatment time, the protective enzyme activity , soluble protein content, cell membrane permeability and MDA content were significantly increased compared with the control. The salt tolerance coefficients of POD and soluble protein in ten clones were positively correlated with SOD, and the salt tolerance coefficient between POD and MDA was negatively correlated. The results showed that clones could reduce the accumulation of MDA and improve their salt tolerance by accumulating a large amount of soluble protein and enhancing the activity of antioxidant enzymes. Based on the principal component analysis and membership function analysis, the salt tolerance of ten clones was evaluated comprehensively. It is preliminarily considered that clones 0057, 422 and XJY have significant salt tolerance and fast-growing performance, which could be used as the important materials for afforestation in saline soil and breeding resource in resistance research.关键词
白杨派/NaCl胁迫/生理指标/耐盐性Key words
Leuce/NaCl stress/physiological index/salt tolerance分类
农业科技引用本文复制引用
杨传宝,孙超,李善文,姚俊修,刘敬国,矫兴杰..白杨派无性系苗期耐盐性综合评价及筛选[J].北京林业大学学报,2017,39(10):24-32,9.基金项目
山东省农业良种工程项目(2012213)、山东省重点研发计划项目(2017GNC11115). （2012213）
