2种趋异型羊草在盐碱胁迫下的克隆可塑性比较研究

Comparative studies on clonal plasticity of two divergent types of Leymus chinensisunder saline-alkali stress

羊草Leymus chinensis有黄绿型和灰绿型2种颜色明显不同的趋异类型,分别从基株、分株种群和个体生理3个层次,对盐碱胁迫条件下2种趋异型羊草的克隆可塑性进行了比较研究。结果表明,在相同的盐碱胁迫强度下,灰绿型羊草的克隆构型较黄绿型更趋于“游击”,且表现出较强的克隆生长特性,但其体内脯氨酸含量低于黄绿型羊草。2种趋异型羊草对盐碱胁迫的不同可塑性反应是对环境的一种有效适应。

Grey-green and yellow-green are two different divergent Leymus chinensis types. Clonal plasticity of two divergent L. chinesis types under saline-alkali stress conditions were compared. The results revealed that under the same intensity of saline-alkali stress, compared with yellow green type, clonal architecture of the grey-green one showed either more ＂guerilla＂ habit, or higher growth rate. However, the content of praline in the grey-green type was less than that in the yellow-green one. The different plasticity of two divergent L. chinensis types to saline-alkali stress showed the results of adapting to environment.