西南林业大学学报2016，Vol.36Issue(3)：18-22,5.DOI:10.11929/j.issn.2095-1914.2016.03.004
干旱胁迫对云南松苗木生理特征的影响
Drought Stress on P hysiological Characteristics of Pinus yunnanensis Seedlings
摘要
Abstract
Effects of drought stress on osmotic adjustment substance and protective enzyme activity of Pinus yunnanensis seedlings were studied by the design of the different drought interval days. The results showed that with-in a certain range, membrane relative conductivity, malondialdehyd, proline, soluble sugar content and superoxide dismutase activity of P. yunnanensis seedlings increased with the extension of the drought interval days. But ranges of the increases were different due to the difference of the drought interval days and the type of osmotic adjustment substance. There were significantly different among treatments ( drought interval days) in soluble sugar and superox-ide dismutase, malondialdehyd content had great differences and no obvious difference among treatments for proline and plasma membrane relative conductivity. Osmotic adjustment ability of soluble sugar was higher than proline. Malondialdehyd has higher correlation with the drought tolerance compared with plasma membrane relative conduc-tivity. The response of drought stress was weak for proline and plasma membrane relative conductivity. The damage of plasma membrane, osmotic adjustment and superoxide dismutase protection were carried out simultaneously, which resulted in the drought tolerance of P. yunnanensis seedlings under drought stress.关键词
云南松/干旱胁迫/渗透调节/酶活性/耐旱性Key words
Pinus yunnanensis/drought stress/osmotic adjustment/enzyme activity/drought tolerance分类
农业科技引用本文复制引用
孙琪,蔡年辉,陈诗,王大玮,段安安,许玉兰..干旱胁迫对云南松苗木生理特征的影响[J].西南林业大学学报,2016,36(3):18-22,5.基金项目
西南林业大学林学学位授权学科经费资助青年后备人才研究项目资助(5009750101-1)；西南地区生物多样性保育国家林业局重点实验室开放基金资助。 （5009750101-1）
