中南民族大学学报（自然科学版）2025，Vol.44Issue(5)：633-638,6.DOI:10.20056/j.cnki.ZNMDZK.20250701
水稻根系结构对铅吸收及转运的影响
Analysis of the effect of rice root development on lead enrichment level
摘要
Abstract
To explore the differences in Pb uptake and transport across various root structures,the distribution of Pb in various tissues and organs of rice plants during the seedling and mature stages,as well as its effects on rice growth and development,were investigated in MS medium and hydroponic methods,using six rice varieties with varying degrees of root development.The results showed that,on MS medium,0.1 mmol/L Pb concentration significantly inhibited the shoot growth of underdeveloped root varieties 23,117 and 330,while it significantly promoted the shoot growth of moderately developed root variety 346 and well-developed root variety 402.0.2 mmol/L Pb concentration promoted root growth in all six rice varieties and significantly enhanced partial above-ground growth of undeveloped root varietie 117 and well-developed root variety 402.Pb content measurements revealed that under Pb treatment in MS medium and hydroponic culture,the content of lead in tissues of varieties with developed root system is higher,but there is no difference in seeds.Additionally,Pb accumulation in various tissues and organs showed the trend of root>stem>leaf>seed.The results indicated that underdeveloped root varieties 023 and 117 had lower Pb uptake and enrichment capacity,and the plants exhibited stronger tolerant to Pb.Conversely,well-developed root varieties 342 and 402 had higher Pb uptake and enrichment capacity,and the plants exhibited lower tolerant to Pb.The research provided a theoretical basis for the screening of rice varieties with low accumulation of heavy metal Pb and the study of the mechanism of Pb uptake and transport in plants.关键词
水稻/重金属/耐受性/铅Key words
rice/heavy metals/tolerance/lead分类
生物学引用本文复制引用
冉旭,侯娜娜,杨新稳,魏金峰,向乔,覃永华..水稻根系结构对铅吸收及转运的影响[J].中南民族大学学报（自然科学版）,2025,44(5):633-638,6.基金项目
中央高校基本科研业务费专项资金资助项目(CZY23002) （CZY23002）
中南民族大学校级科研重点机构平台项目(PTZ24021) （PTZ24021）
