土壤盐渍化是全球面临的具有挑战性的环境问题之一，提升作物抗盐性是开发盐渍土资源的关键。氯化胆碱作为低毒高效的植物生长调节剂，可有效缓解植物盐胁迫，玉米作为重要的粮食作物和饲料作物，其在盐渍化土壤中的生长面临诸多挑战。本研究综合生理指标测定与分子生物学方法，系统探究喷施氯化胆碱对盐胁迫下玉米幼苗生长的调控作用。结果表明，盐胁迫下喷施氯化胆碱能有效增加玉米根系长度，提高玉米叶绿素含量，增强氮素吸收能力；同时促进渗透调节物质可溶性蛋白的含量和降低过氧化物丙二醛的含量；另外还能提高超氧化物歧化酶(SOD)、过氧化氢酶(CAT)等抗氧化酶活性，从多维度缓解盐胁迫损伤。该研究为盐渍土区域玉米农业生产提供理论与技术支撑，为增强幼苗抗逆性并培育玉米壮苗提供参考。

Soil salinization has become one of the most challenging environmental issues worldwide. Improving crop salt tolerance is crucial for utilizing saline soil resources. As a low-toxicity and highly effective plant growth regulator, choline chloride can effectively alleviate salt stress in plants. Maize, as an important food and forage crop, faces numerous challenges when growing in saline soils. This study systematically investigates the regulatory effects of foliar-applied choline chloride on the maize seedling growth under salt stress through integrated physiological measurements and molecular biology approaches. The results demonstrate that choline chloride application under salt stress significantly increases root length, enhances chlorophyll content, improves nitrogen uptake capacity, promotes osmoregulatory substance (soluble protein) accumulation, reduces malondialdehyde content, and elevates antioxidant enzyme activities(SOD, CAT), thereby alleviating salt stress damage through multiple pathways. This study provides theoretical and technical support for maize production in saline soils and offers references for enhancing seedling stress resistance and cultivating vigorous maize seedlings.

S513；S156

西北农林科技大学大学生创新创业计划项目(XN2025001011)。