铅胁迫对不同品种玉米根系钾吸收的影响  

Effects of Lead Stress on Potassium Uptake by Roots of Different Maize Varieties

作　　者：贺鹏亮 崔玲 翁庆北[1,2] 牛晓娟 方正[1] 王玉倩[1] He Pengliang;Cui Ling;Weng Qingbei;Niu Xiaojuan;Fang Zheng;Wang Yuqian(College of Life Sciences,Guizhou Normal University,Guiyang,550001;Qiannan Normal University for Nationalities,Duyun,558000)

机构地区：[1]贵州师范大学生命科学学院,贵阳550001 [2]黔南民族师范学院,都匀558000

出　　处：《分子植物育种》2024年第6期1968-1972,共5页Molecular Plant Breeding

基　　金：贵州省科教青年英才培养工程项目(黔省专合字[2012]144号);贵州省科技厅-贵州师范大学科技合作计划项目(黔科合J字LKS[2010]19号);贵州省微生物-植物互作及代谢调控科技创新人才团队项目(黔科合平台人才[2019]5617号)共同资助。

摘　　要：为阐明铅胁迫对植物根系钾吸收的机制及重金属铅植物修复的模式,本研究以不同浓度Pb^(2+)处理4种玉米,探究其对玉米总钾吸收速率和由NSCCs介导的钾吸收速率诱导的影响,以及4种玉米对Pb吸收的变化趋势。结果表明,Pb^(2+)可以影响NSCCs的钾吸收,但不同品种玉米根系NSCCs对铅的敏感性不同,随着Pb^(2+)浓度的增大,品种间的总钾吸收差异和NSCCs钾吸收差异趋近于零。‘金玉818’的铅吸收量增幅最显著,可作为潜在的铅污染治理的备选品种。本研究补充了玉米根系通过NSCCs进行离子吸收方面的资料,为进一步了解铅、钾离子的吸收机制提供了研究基础。In order to elucidate the mechanism of potassium uptake in plant roots under lead stress and the model of lead phytoremediation.In this study,the effects of different concentrations of Pb^(2+)on the total K+uptake rate and the K+uptake rate mediated by NSCCs(Non-selective cation channels)in roots of four maize varieties were investigated,and the trend of Pb uptake in four maize varieties was also discussed.The results showed that Pb^(2+)could affect the potassium absorption of NSCCs,but the sensitivity of different varieties of maize root NSCCs to lead was different.With the increase of Pb^(2+)concentration,the difference of total potassium absorption and potassium absorption of NSCCs between varieties tended to zero.'Jinyu818'has the most significant increase in lead absorption,and can be used as a potential alternative varietyfor lead pollution control.This studysupplemented the data of ion absorption by maize roots through NSCCs,and provided a research basis for further understanding the absorption mechanism of lead and potassium ions.

关 键 词：铅胁迫 非选择性阳离子通道 钾吸收 

分 类 号：X173[环境科学与工程—环境科学] S513[农业科学—作物学]