【摘要】 以金沙江干热河谷主要树种坡柳、银合欢和山毛豆幼苗为材料,通过盆栽苗自然干旱胁迫,同时以浇水处理为对照,探讨了干旱胁迫下三树种幼苗叶片的相对含水量、质膜透性以及脯氨酸含量的变化情况。结果表明,干旱胁迫后三树种叶片的相对含水量、质膜相对透性以及脯氨酸含量都发生了变化,只是变化的幅度和进程不同。三项生理指标的综合分析及结合其自然表现,坡柳具有较强的抗旱能力,其次为银合欢,最后是山毛豆。更多还原

【Abstract】 Dodonaea viscosa,Leucaena leucocephala and Tephrosia candida seedlings as materials,the changes of relative water content of leaves,cytomembrane permeability and proline content under drought stress were studied while watering seedlings were as the control. The results indicate that relative water content of leaves,cytomembrane permeability and proline content of three species are all changed under natural drought stress. However,extent and process of the changes are different in species. Integrated analysis on physiological indexes of the three species and their growth and distribution in nature,D.viscosa shows the strongest adaptability under drought stress,L.leucocephala the second,and T.candida the last.更多还原