NaCl胁迫对黑麦草几种抗逆生理指标的影响

采用1%NaCl胁迫处理黑麦草,以未经NaCl胁迫的、在同样环境条件下生长的黑麦草为对照（蒸馏水处理）,分析检测处理5d内黑麦草几种抗逆生理指标的变化规律。结果表明：NaCl胁迫5d内黑麦草叶片MDA含量呈现先升高后降低的趋势;Pro大量积累;叶绿素含量于胁迫后第2d极显著升高,3d后呈下降趋势;SOD活性呈现先下降后升高的趋势;CAT和POD活性于胁迫后第2d显著增加后呈下降趋势;细胞膜透性急剧增加。结论：黑麦草能够对盐渍环境做出必要的响应,以维持正常的生理活动,从而表现出较强的耐盐能力。

Effects of NaCl stress on some Physiological Indexes in Lolium perenne

The effects of 1%NaCl stress on Lolium perenne leaves were studied. Take non-NaCl stress as control to mensurate the change of physiological indexes of leaves within five days. The results indicated that：MDA content increased at first and then decreased after NaCl stress in the leaves of Lolium perenne within five days; Proline accumulated significantly; chlorophyll content increased significantly after the second day,three days later showed a downward trend under NaCl concentration; SOD activity decreased firstly then increased; CAT and POD activity declined the day after significantly increased; Membrane permeability increased dramatically. These results indicated that Lolium perenne can make the necessary response to saline environment in order to maintain normal physiological activity,and showed highly tolerant against salt-stress.