文献类型：期刊文献

中文题名：镉在南美蟛蜞菊、蟛蜞菊及其杂交种中的迁移和分布特征

英文题名：Migration and Distribution Characteristics of Cadmium in Sphagneticola trilobata,S.calendulacea and Their Hybrid

作者：黄骏东[1] 柯伟倩[1] 陈广欣[1] 古晓倩[1] 张启雷[1,2] 彭长连[1]

第一作者：黄骏东

机构：[1]广东省植物发育生物工程重点实验室,华南师范大学生命科学学院,广州510631;[2]中国林业科学研究院热带林业研究所,广州510520

年份：2022

卷号：30

期号：2

起止页码：224-232

中文期刊名：热带亚热带植物学报

外文期刊名：Journal of Tropical and Subtropical Botany

收录：CSTPCD;;北大核心:【北大核心2020】；CSCD:【CSCD_E2021_2022】；

基金：国家自然科学基金项目(32171493,31870374)资助。

语种：中文

中文关键词：镉;蟛蜞菊;杂交种;植物修复;重金属

外文关键词：Cadmium;Sphagneticola;Hybrid;Phytoremediation;Heavy metal

分类号：X173

摘要：为了解植物对镉的吸收和迁移特性,用200μmol/L镉处理蟛蜞菊(Sphagneticola calendulacea)、南美蟛蜞菊(S.trilobata)及其杂交种,研究了其对镉的吸收、迁移与分布的差异。结果表明,随着镉处理时间的延长,3种植物茎和叶中的镉含量逐渐上升,叶片的镉含量逐渐与茎相当,而根部的镉含量一直是最高的;整株水平上,杂交种的镉含量一直是最高的。恢复生长后,3种植物根中镉含量均呈下降趋势,杂交种(50.4%)>蟛蜞菊(35.8%)>南美蟛蜞菊(33.7%)。镉在3种植物的叶位分布模式在去镉前后没有明显的变化,杂交种更偏向将重金属镉积累于幼叶和成熟叶中。3种植物从叶脉、叶脉间隙到叶片边缘的镉含量逐渐下降,南美蟛蜞菊叶脉的镉含量(2766.3μg/kg)最高。可见,杂交种对镉的吸收和转运转移能力高于双亲,预示其在未来应用于植物修复中具有更大的潜力。
In order to understand the migration and absorption characteristics of cadmium,the differences in absorption,migration and distribution of cadmium were studied in Sphagneticola calendulacea(indigenous congener),S.trilobata(alien invasive species)and their hybrid treated with Hoagland solution containing 200μmol/L CdCl_(2).The results showed that the cadmium concentrations in stems and leaves of three species gradually increased with the time extension of cadmium treatment,and the cadmium concentrations in leaves gradually matched that in stems,while that in roots of three species was always the highest.For the whole plant,cadmium concentration of the hybrid was also the highest under stress.After recovery growth,the cadmium concentrations in roots of hybrid,S.calendulacea,and S.trilobata declined by 50.4%,35.8%,and 33.7%,respectively.Distribution pattern of cadmium in leaves of three species had not significant change treated with/without CdCl_(2).The hybrid tended to accumulate cadmium in young and mature leaves.The cadmium concentrations gradually decreased from vein,internal vein and leaf edge of three species,which in internal vein of S.trilobata was the highest(2766.3μg/kg).Therefore,the hybrid displayed stronger ability to absorb,transport and transfer cadmium than its parents,suggesting that it had greater potential in phytoremediation in the future.