持续干旱下4个柳树无性系生理生态适应性研究  

Ecophysiological adaptation of four Salix clones under persistent drought stress

作　　者：台秀国 杨振亚[1] 李波[1] 曹振玉[1] 曹帮华[1] 

机构地区：[1]山东农业大学农业生态与环境重点实验室,山东泰安271000

出　　处：《山东科学》2016年第3期97-104,共8页Shandong Science

基　　金：国家林业公益性行业科研专项(201404107);山东省重点研发计划(2015GNC111026)

摘　　要：为比较柳树无性系对干旱胁迫生理生态适应性的差异,通过盆栽试验研究了持续干旱胁迫下4个柳树无性系一年生扦插苗渗透调节、保护酶活性等指标的动态变化。研究结果表明,随着干旱胁迫时间的增加,电导率、丙二醛逐渐增加;4个无性系渗透调节物质脯氨酸、可溶性糖和保护酶系统过氧化物酶、超氧化物歧化酶在胁迫过程中整体呈上升的趋势,随着胁迫程度的加强,抗旱性弱的无性系最先表现出下降的趋势。利用主成分分析所有生理生态指标,对4个无性系抗旱性进行综合评价。To compare the difference of ecophysiological adaptation of four Salix clones, we addressed the dynamic variation of osmotic adjustment and protective enzyme activities of their annual cutting seedlings under persistent drought stress by pot experiments. Results show that relative electrical conductivity and malondialdehyde gradually increase with the increase of drought stress time. Their proline, soluble sugar and activities of peroxidase and superoxide dismutas totally increase. Drought resistance capability of poor drought resistance clones first decreases with the increase of drought stress. We comprehensively evaluate drought resistance of the four Salix clones with principal component analysis based ecophysiological indexes.

关 键 词：干旱胁迫 渗透调节 保护酶 主成分分析 抗旱性 

分 类 号：S792.12[农业科学—林木遗传育种]