中国农学通报2026，Vol.42Issue(6)：22-30,9.
耐盐碱复合菌系提升玉米幼苗抗逆促生的机制研究
Research on Mechanism of Salt-Tolerant and Alkali-Tolerant Compound Bacterial Strains for Enhancing Stress Resistance and Promoting Growth in Maize Seedlings
摘要
Abstract
In order to explore the microbial resources of saline-alkali tolerance,stress resistance and growth promotion in the cold and arid regions of northern China,and to support the sustainable development of agriculture in saline-alkali land,the stable saline-alkali tolerant composite strains GF-S1,GF-S2 and GF-S3 were used as materials,and the maize variety'Dika 159'was used as the test crop.The mechanism of stress resistance and growth promotion of composite strains on maize seedlings under saline-alkali stress(soil pH 9.0,total salt content 3.15 g/kg)was investigated by pot experiment.The activities of antioxidant enzymes(CAT,POD,SOD),the contents of osmotic regulatory substances(proline,MDA),plant height,fresh weight and dry weight of maize leaves at different growth stages(7,14,21,28 d)were determined,and the correlation analysis was carried out.The results indicated that under saline-alkali stress,the composite bacterial strain could all enhance the antioxidant enzyme activity of corn leaves,increase the proline content,reduce the malondialdehyde content,and increase the plant height,total fresh weight and total dry weight of corn.Among them,the stress-resistant promoting effect of the composite bacterial strain GF-S3 was the best.On the 28th day,compared with CK,the antioxidant enzyme activities of GF-S3 increased by 21.85%,18.64%,and 18.91%respectively,the proline content increased by 18.98%;the malondialdehyde content decreased by 54.24%;the height of the corn plants,the fresh weight of the whole plant,and the dry weight of the whole plant increased by 28.27 cm,9.39 g,and 9.49 g respectively.The dry weight of the entire corn plant was significantly positively correlated with CAT,POD,SOD,and free proline content(P<0.05),with correlation coefficients of 0.72,0.73,0.92,and 0.94 respectively;there was no significant correlation between the malondialdehyde content of corn leaves and these parameters(P>0.05).Under saline-alkali stress,the application of the composite bacterial strain can significantly enhance the stress resistance of corn and promote its growth.Among them,the composite bacterial strain GF-S3 has the best stress resistance promoting effect.This research provides beneficial microbial resources for stress resistance and growth promotion in the saline-alkali resistant areas of northern cold and arid regions.关键词
玉米/盐碱胁迫/耐盐碱复合菌系/复合菌剂/抗逆促生效应Key words
maize/salt and alkali stress/saline-alkali tolerant bacteria strain/compound bacterium agent/stress resistance and growth promotion分类
农业科技引用本文复制引用
李东波,于晓芳,赵晓宇,青格尔,赵文山,韩旭珂,李敏,屈佳伟,马达灵,高聚林..耐盐碱复合菌系提升玉米幼苗抗逆促生的机制研究[J].中国农学通报,2026,42(6):22-30,9.基金项目
国家重点研发计划"东北西部春玉米、大豆轮作轮耕与秸秆促腐培肥全程机械化耕种技术研发"(2023YFD2301801) （2023YFD2301801）
国家自然科学基金"玉米秸秆低温高效降解复合菌剂田间促腐机制及微生态效应研究"(32260532) （32260532）
内蒙古自治区科技计划项目"寒旱区玉米秸秆原位促腐还田的微生物学过程与调控机制研究"(2025KYPT0086) （2025KYPT0086）
内蒙古自治区高等学校青年科技英才支持计划(NJYT25021) （NJYT25021）
国家玉米产业技术体系蒙西综合试验站(CARS-02-74) （CARS-02-74）
内蒙古自治区直属高校基本科研业务费项目(BR251006). （BR251006）
