林业科学2013，Vol.49Issue(1)：91-98,8.DOI:10.11707/j.1001-7488.20130114
3个树种苗期耐盐性综合评价及指标筛选
Comprehensive Evaluation of Salt Tolerance and Screening Identification Indexes for Three Tree Species
摘要
Abstract
The morphological characteristics, physiological indexes and mineral elements were investigated with seedlings of Euonymus alantus, Elaeagnus angustifolia and Fraxinus Americana. The seedlings were cultivated in pots that were treated with different NaCl concentrations. The results showed; Under salt stress, the relative height growth and biomass inhibited. The chlorophyll content decreased with increase of the salt concentration. The membrane permeability, MDA, SOD, proline and soluble sugar content of salt-stressed plants increased as the salt concentration increased. Under the salt stress, the Na+ content of the roots, stems and leaves of plants increased gradually, while the change pattern of K+ content was different. The K+ content in roots decreased with the NaCl concentration increased, it in stems had no significant changes, and it in leaves of 3 tree species had differential changes. Salt tolerance of the 3 tree species was comprehensively evaluated with correlation analysis, principal component analysis and subordinative function. The sequence of salt tolerance of the 3 tree species from strong to weak was: E. alantus > E. angustifolia > F. americana. This result was coincided with the sequence ranked in terms of symptoms of salt injury. Screening identification indexes was studied by gray correlation analysis and the results showed that the relative height growth, membrane permeability, proline, Na+ and K + contents were important indexes for evaluating salt tolerance of the species.关键词
盐胁迫/耐盐性/综合评价/指标筛选Key words
salt stress/ salt tolerance/ comprehensive evaluation/ screening identification indexes分类
农业科技引用本文复制引用
杨升,刘正祥,张华新,杨秀艳,刘涛,姚宗国..3个树种苗期耐盐性综合评价及指标筛选[J].林业科学,2013,49(1):91-98,8.基金项目
"十二五"国家科技计划项目(2011BAD38B01X) （2011BAD38B01X）
中央级公益性科研院所基本科研业务费专项资金项目(CAFYBB2011005-5). （CAFYBB2011005-5）
