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
贺鹏亮 1崔玲 1翁庆北 2牛晓娟 1方正 1王玉倩1
作者信息
- 1. 贵州师范大学生命科学学院,贵阳,550001
- 2. 贵州师范大学生命科学学院,贵阳,550001;黔南民族师范学院,都匀,558000
- 折叠
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Pb2+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,Pb2+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Pb2+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.
Abstract
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 Pb2+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 Pb2+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 Pb2+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 variety for lead pollution control.This study supplemented 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Key words
Lead stress/Non selective cation channel/Potassium absorption引用本文复制引用
基金项目
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)
出版年
2024
NETL
NSTL
万方数据