萌发期和苗期糯玉米对低温胁迫的生理响应  

Physiological response of waxy maize to low temperature during germination stage and seedling stage

作　　者：于滔[1,2,3] 张建国 曹靖生[1,2,3] 王丽珊 刘长华[4] 杨耿斌 李文跃 YU Tao;ZHANG Jianguo;CAO Jingsheng;WANG Lishan;LIU Changhua;YANG Gengbin;LI Wenyue(Maize Research Institute of Heilongjiang Academy of Agricultural Sciences,Harbin 150086;Key Laboratory of Biology and Genetics Improvement of Maize in Northern Northeast Region,Ministry of Agriculture and Rural Affairs,Harbin 150086;Key Laboratory of Germplasm Resources Creation and Utilization of Maize,Harbin 150086;College of Advanced Agriculture and Ecological Environment,Heilongjiang University,Harbin 150086,China)

机构地区：[1]黑龙江省农业科学院玉米研究所,哈尔滨150086 [2]农业农村部东北北部玉米生物学与遗传育种重点实验室,哈尔滨150086 [3]黑龙江省玉米种质资源创制与利用重点实验室,哈尔滨150086 [4]黑龙江大学现代农业与生态环境学院,哈尔滨150086

出　　处：《干旱区资源与环境》2023年第6期201-208,共8页Journal of Arid Land Resources and Environment

基　　金：黑龙江省自然科学基金(LH2022C096);国家重点研发计划(2021YFD1201001,2021YFD1201001-2);黑龙江省农业科学院创新工程资助项目(CX23ZD05);黑龙江省重点研发计划(JD22A010);科技创新工程(2020FJZX042)资助。

摘　　要：为研究萌发期和苗期糯玉米对低温胁迫的生理响应机制,研究选取20份黑龙江省常用糯玉米自交系为试验材料,探讨低温胁迫(5℃)造成玉米发芽进程、幼苗生长、生物量积累及生理响应差异的机制。结果表明:低温会显著降低糯玉米种子萌发率,抑制幼苗生长和生物量的积累,提高保护酶活性,增加渗透调节物质含量及提高膜脂过氧化水平,降低叶片叶绿素含量及根系活力。To study the mechanism in physiological response of waxy maize to low temperature stress during germination stage and seedling stage,in this study,20 inbred lines of commonly waxy maize in Heilongjiang province were selected as experimental material to explore the mechanism in germination process,seedling growth,biomass accumulation and physiological response of maize caused by low temperature stress at 5℃.The results showed that:low temperature could significantly reduce the germination rate of waxy maize seeds,inhibit seedling growth and biomass accumulation,improve the activity of protective enzymes,increase the content of osmotic adjustment substances,increase the level of membrane lipid peroxidation,reduce leaf chlorophyll content and root activity.

关 键 词：糯玉米 低温胁迫 萌发期 苗期 生理响应 

分 类 号：Q945.78[生物学—植物学]