黑龙江农业科学Issue(5)：17-22,6.DOI:10.11942/j.issn1002-2767.2025.05.0017
不同低温耐性玉米自交系苗期对低温胁迫的生理响应
Physiological Response of Different Low Temperature Tolerant Maize Inbred Lines to Low Temperature Stress During Seedling Stage
摘要
Abstract
In order to explore the physiological mechanism of low temperature tolerance in maize,the low-temperature-tolerant maize inbred line B144 and the low-temperature-sensitive maize inbred line Q319 were used as experimental materials,and treated in low-temperature stress at 5 ℃.By comparing the changes in plant height,biomass,SOD,POD,MDA activities,soluble sugar content,root vigour and chlorophyll content of maize during seedling stage were studied under low temperature(5 ℃),the effect of low temperatures on maize seedlings of different genotypes were studied.The results showed that,low temperature could significantly inhibit seedling growth and biomass accumulation,the average plant heights of B144 and Q319 decreased by 31.33％ and 34.42％ respectively.SOD activity,POD activity,soluble sugar content,root vigour and chlorophyll content of cold sensitive inbred lines Q319 decreased significantly compared to the tolerant maize inbred lines B144 under low-temperature stress conditions.However,malondialdehyde content showed an increasing trend among the seedlings of maize with different genotypes.The study showed that B144 exhibited strong cold tolerance,the accumulation of soluble sugar content and a variety of antioxidant enzymes jointly involved as the response mechanism of the formation of chilling resistance of maize seedlings.关键词
玉米/低温胁迫/苗期/生理响应Key words
maize/low temperature stress/seedling stage/physiological response引用本文复制引用
马雪娜,于滔,张建国,曹士亮,杨耿斌,李文跃..不同低温耐性玉米自交系苗期对低温胁迫的生理响应[J].黑龙江农业科学,2025,(5):17-22,6.基金项目
黑龙江省科研业务费项目(CZKYF2025-1-B002) （CZKYF2025-1-B002）
黑龙江省农业科学院创新工程资助项目(CX23ZD05,CX23JQ04) （CX23ZD05,CX23JQ04）
黑龙江省种业创新发展项目(2024HZYCXNK07). （2024HZYCXNK07）
