云南农业大学学报2011，Vol.26Issue(5)：673-677,5.DOI:10.3969/j.issn.1004-390X(n).2011.05.017
PEG处理对蛇皮果幼苗的生理响应及酶变化研究
Biophysical Response and Enzyme Activity of Salak [ Salacca zalacca (Gaertner) Voss ] to PEG Stress
摘要
Abstract
The effect of drought on the seedlings was evaluated by testing the variance of physiological and biochemical parameters and this experiment were conducted using treatments of different polyethylene glycol ( PEG-6000) concentrations ( mild stress, moderate stress, severe stress) and different stress durations (24, 48, 72 h). The results indicated that the relative water content in leaves showed a decreased tendency with the increase of stress intensity and the treating time, and the control treatment was significant lower than other treatments (P < 0. 05 ). The relative conductivity tended to increase and every treatment showed significant difference when treated with 48 h and 72h ( P < 0. 05 ) ; the proline and MDA content tended to increase and their highest values were attained under severe stress treatment; the highest activities of SOD, POD, PPO were attained when treated 24h, mild stress, severe stress, respectively. The index of relative conductivity, MDA content and soluble sugar were intuitive and as proper physiological indices for evaluating drought resistance of seedlings of salak.关键词
蛇皮果/PEG胁迫/质膜透性/保护酶活性/渗透调节Key words
salak/ PEG stress/ membrane permeability/ activity of enzyme/ osmoregulation分类
农业科技引用本文复制引用
孙程旭,刘立云,李荣生,曹红星,冯美利,陈思婷,张军..PEG处理对蛇皮果幼苗的生理响应及酶变化研究[J].云南农业大学学报,2011,26(5):673-677,5.基金项目
国家林业局"948"项目(2007-4-11). （2007-4-11）
