外源肌醇对玉米耐盐性的影响

Effect of Exogenous Inositol on Salt Tolerance of Maize

为探究玉米的抗逆性,以玉米品种龙作2号为材料,采用生理指标检测的方法,通过比较叶绿素、丙二醛和脯氨酸等指标的变化,研究外源肌醇对盐胁迫下玉米幼苗耐盐性的影响。结果表明:盐胁迫24、48h时,T3组(NaCl+肌醇)的叶绿素含量与T2组(NaCl)的相比分别上升了10.32%、29.29%,差异达到显著水平(P<0.05);盐胁迫48、72h时,T3组的丙二醛含量与T2组相比分别下降了21.21%、38.84%,差异达到显著水平(P<0.05);盐胁迫24、48、72h时,T3组的脯氨酸含量与T2组相比分别下降了25.00%、47.46%、35.10%,差异均达到显著水平(P<0.05)。说明:施加外源肌醇能够提高玉米幼苗叶绿素含量,降低丙二醛、脯氨酸含量,增强幼苗对盐渍环境的抵抗能力,缓解盐害。

In order to explore the resistance of maize ,taking maize hybrid Longzuo 2 as material ,using physio-logical index detection methods ,the effect of exogenous inositol on salt tolerance of maize seedling was studied by comparison of the content of chlorophyll ,MDA and proline .The results showed that the chlorophyll content of T3（NaCl and inositol）under the salt stress for 24 and 48 h rose 10 .32% and 29 .29% respectively compared with T2（NaCl） ,and the difference was significant（P〈0 .05） .The MDA content of T3 under the salt stress for 48 and 72 h reduced 21 .21% and 38 .84% respectively compared with T 2 ,and the difference was signific-ant（P〈0 .05） .The proline content of T3 under the salt stress for 24 ,48 and 72 h reduced 25 .00% ,47 .46%and 35 .10% respectively compared with T2 ,and the difference was significant（P〈0 .05） .The results indicated that exogenous inositol could increase the content of chlorophyll and decrease content of MDA and proline ,so it could strengthen salt tolerance of maize seedling and alleviate salt stress .