中国生态农业学报（中英文）2026，Vol.34Issue(5)：989-998,10.DOI:10.12357/cjea.20250503
芒萁的器官-亚细胞稀土分布特征及耐受阈值
Distribution characteristics and tolerance thresholds of organ-subcellular rare earth elements in Dicranopteris pedata
摘要
Abstract
Dicranopteris pedata is the strongest rare earth hyperaccumulator known to date,while its tolerance to rare earths has not been elucidated.In this study,D.pedata in the mining area was taken as the research object,and the addition experiments of representative rare earth elements cerium and yttrium were carried out to analyze the rare earth enrichment characteristics of different organs and subcellular components of D.pedata under different rare earth concentrations.The results showed that:1)The total content of cerium in D.pedata increased with the increase in rare earth concentration,and the total yttrium content peaked at 0.8 mmol/L.The enrichment coefficient for the light rare earth element cerium was greater than that for the heavy rare earth element yttrium.2)When the concentration of cerium or yttrium was≤0.8 mmol/L,the rare earth content in organs of D.pedata followed the trend of leaf>rhizome>petiole,while when the concentration was 1.6 mmol/L,the cerium content followed the trend of rhizome>leaf>petiole,and the yttrium content in various organs followed the trend of petiole>leaf>rhizome.3)Cerium and yttrium in the leaves and roots of D.pedata distributed in the cell wall accounted for the largest proportion,and the proportions of cerium and yttrium content in the leaf cell wall increased with the increase in rare earth concentration.4)There were significant differences in the proportions of cerium and yttrium content in the subcellular components of D.pedata petioles at low and high addition concentrations.D.pedata has strong tolerance and enrichment ability to rare earth elements.The aboveground part(especially the leaves)of D.pedata can effectively regulate the distribution of rare earth elements through compartmentalization isolation,and the enrichment ability for cerium is stronger than that for yttrium.The cell wall is the key part of rare earth accumulation.The results of this study can provide a theoretical basis for the remediation of soil rare earth pollution by using the rare earth hyperaccumulator D.pedata.关键词
稀土元素/芒萁/吸收富集特征/亚细胞/耐受响应Key words
rare earth elements/Dicranopteris pedata/absorption and enrichment characteristics/subcellular/tolerance response分类
资源环境引用本文复制引用
陈伊虹,陈俊华,陈志彪,许祯安,王海燕,罗立津..芒萁的器官-亚细胞稀土分布特征及耐受阈值[J].中国生态农业学报（中英文）,2026,34(5):989-998,10.基金项目
国家自然科学基金项目(42277013)和福建师范大学交叉创新团队项目(Y0720409B06)资助 This study was financially supported by the National Natural Science Foundation of China(42277013)and the Program for Cultivating Innovative Team,Fujian Normal University(Y0720409B06). （42277013）
