朱永兴　郭生虎　关雅静

摘要 [目的]了解玉米盐胁迫后其体内的生理机制变化。[方法]对4个玉米自交系（S145、S295、S377、B73）盐胁迫后的生理指标变化进行研究。[结果]盐胁迫后，4份材料的脯氨酸含量、脯氨酸累积量、丙二醛含量、丙二醛累积量都有明显变化;其中，S295在盐胁迫后，其地上、地下部分脯氨酸含量明显升高，且其脯氨酸在盐胁迫前后的累积量最高，丙二醛含量没有明显变化;其次是S145，其地上部分在盐胁迫后脯氨酸含量也表现出明显的上升，但其地下部分脯氨酸含量无明显变化，丙二醛含量及累积量在盐胁迫前后无明显变化;而S377、B73在盐胁迫前后脯氨酸含量及累积量较低。盐胁迫后，玉米自交系S295、S145积累了较多的脯氨酸，具有较强的耐盐性，而S377、B73脯氨酸的积累量较少，耐盐性相对较弱。[结论]该研究可为今后玉米耐盐品种的选育提供理论依据。

关键词 玉米;盐胁迫;脯氨酸;丙二醛

中图分类号 S 513文献标识码 A

文章编号 0517-6611（2020）23-0048-03

doi：10.3969/j.issn.0517-6611.2020.23.011

Changes of Several Physiological Indexes of Maize Inbred Lines under Salt Stress

ZHU Yong-xing，GUO Sheng-hu，GUAN Ya-jing

（Research Center of Agro-biotechnology，Ningxia Academy of Agricultural Sciences，Yinchuan，Ningxia 750002）

Abstract [Objective]In order to understand the physiological mechanism changes of maize after salt stress.[Method]The changes of physiological indexes of four maize inbred lines （S145，S295，S377，B73） after salt stress were studied.[Result]After salt stress，the proline content，proline accumulation，malondialdehyde content and malondialdehyde accumulation of the four materials had obvious changes; among them，the proline content in the above-ground and underground parts of S295 increased significantly after salt stress，and the proline accumulation was the highest before and after salt stress，but the malondialdehyde content was not.The content of proline in the aboveg-round part of S145 increased significantly after salt stress，but the content of proline in the underground part did not change significantly，and the content and accumulation of malondialdehyde did not change significantly before and after salt stress，while the content and accumulation of proline in S377 and B73 were the lower before and after salt stress.After salt stress，maize inbred lines S295 and S145 accumulated more proline and had stronger salt tolerance，while S377 and B73 had less accumulation of proline and relatively weak salt tolerance.[Conclusion]The research can provide a theoretical basis for the selection of maize salt-tolerant varieties in the future.

Key words Zea mays L.;Salt stress;Proline;Malondialdehyde

土壤鹽渍化及次生盐渍化问题已成为世界农业生产面临的主要问题。据不完全统计，全球盐渍化土地面积约9.54亿hm2，亚洲约为3.99亿 hm2，而我国盐渍化土壤面积约为0.35 亿hm2 [1]。目前，土地盐碱化已成为日益严重的环境问题之一，也是农业生产面临的重要问题[2]。开发利用盐碱荒地是解决这一问题最主要的方法，而筛选及培育耐盐植物是解决这一问题的最关键途径。

玉米（Zea mays L.）作为我国第一大作物，主要是因其生物量大，但其耐盐碱性相对较差，属于中度盐敏感作物。……