羊草苗对盐碱胁迫的反应和适应性

PHYSIOLOGCAL RESPONSES AND ADAPTIVE FACULTY FOR LEYMUS CHINENSIS SEEDLINGS TO SALINE-ALKALI STRESS

Under the simulated saline-alkali stress conditiongs physieloogoical and mctabolic variatons of halophytes Leymus chinensis seedlings, growing in the culture solutions with various concentration Na_2CO_3, were observed and analysed. The results showed that there were the growth inhbition, the increase of relative cell permeability, the accumulation of proline and citric and the increase of inorganic ion Na~+ in Leymus chinensis seedling with the increasing of Na_2CO_3 concentration in culture solutions. The osmotis regulation in Leymus chinensis seedl ing is mainly under way synthesizing or accumnlating organis solute. Laymus chinensis seedlings have a certain adaptive ability to salinealkali stress, and adapt to variation of saline-alkali enviro-nment by ways of strain reversibility and strain repair.