水分胁迫对3个不同地区橡胶草生理特性的影响  

Effects of water stress on physiological characteristics of Taraxacum kok-saghyz Rodin( TKS) populations from three different regions

作　　者：徐建欣[1] 杨洁[1] 高玉尧[1] 吴景[1] 孙正美[1] 刘实忠[1] 

机构地区：[1]中国热带农业科学院湛江实验站/热带旱作农业研究中心,广东湛江524013

出　　处：《干旱地区农业研究》2016年第3期153-159,共7页Agricultural Research in the Arid Areas

基　　金：中国热带农业科学院湛江实验站科研启动专项经费(zjky201303)

摘　　要：本研究以3个不同地理来源的橡胶草群体为研究对象,使用不同浓度的聚乙二醇(PEG-600)溶液分别对3个供试群体成员苗期进行模拟水分胁迫,测定了其叶片相对含水量、叶绿素含量、抗氧化保护酶活性、渗透调节物质含量、丙二醛含量、叶片长度、叶片宽度以及最大根长。结果表明,随着胁迫浓度的提高3个供试群体的叶片相对含水量、叶绿素含量、抗氧化保护酶活性以及生长发育指标呈下降趋势,渗透调节物质含量以及丙二醛含量呈上升趋势;综合各指标表明,3个供试橡胶草群体抗旱性表现为昭苏群体>石河子群体>临夏群体。Three TKS populations from different regions were taken as the test materials in this paper,and the effects of simulated drought stress with different concentration of polyethylene glycol（ PEG6000） were investigated on their leaf water content,chlorophyll content,activity of antioxidant protective enzyme,content of osmotic adjustment and MDA,leaf length,leaf width and maximum root length. The results showed that leaf water content,chlorophyll content,activity of antioxidant protective enzyme and growth and development indexes became decreased and content of osmotic adjustment and MDA went increased with the increase of drought stress. All of these variations suggested that drought resistance capabilities of three TKS populations from different regions are in the order of Zhaosu population Shihezi population Linxia population.

关 键 词：橡胶草 水分胁迫 聚乙二醇 生理反应 

分 类 号：S576[农业科学—作物学] Q945.78[生物学—植物学]