一种新发现的镉超积累植物——钻叶紫菀(Aster subulatus Michx.)  

A newly discovered cadmium hyperaccumulator——Aster subulatus Michx.

作　　者：陈伟[1,2] 蒋文艳 杨玉霞[1,2] 廖洁 王海军[1,2] 梁雪莲 莫磊兴[1,2] 王天顺 CHEN Wei;JIANG Wenyan;YANG Yuxia;LIAO Jie;WANG Haijun;LIANG Xuelian;MO Leixing;WANG Tianshun(Research Institute of Agro-products Quality Safety and Testing Technology,Guangxi Academy of Agriculture Sciences,Nanning 530007,China;Quality Supervision and Testing center for Sugarcane,Ministry of Agriculture and Rural Affairs of China,Nanning 530007,China)

机构地区：[1]广西农业科学院农产品质量安全与检测技术研究所,南宁530007 [2]农业农村部甘蔗品质监督检验测试中心(南宁),南宁530007

出　　处：《生态学报》2023年第13期5592-5599,共8页Acta Ecologica Sinica

基　　金：广西自然科学基金项目(2020GXNSFAA259051);广西农业科学院科技发展基金项目(桂农科2021JM30,桂农科2021JM117)。

摘　　要：通过野外调查和温室营养液砂培试验,发现并鉴定出钻叶紫菀(Aster subulatus Michx.)是一种新的镉(Cd)超积累植物。调查结果发现,钻叶紫菀对土壤中高含量的Cd有很强的忍耐、吸收和积累能力,其地上部茎、叶Cd含量分别为90.0—150.7mg/kg和119.8—172.6mg/kg,平均值分别为132.8mg/kg和139.2mg/kg。砂基营养液培养试验证明,钻叶紫菀对生长介质中的Cd有很强的忍耐能力,当生长介质中Cd浓度高达150mg/L时,植株仍生长正常,其株高与对照相比无显著差异;地上部Cd含量及其积累量均随生长介质中Cd浓度的增加而增加,当生长介质中Cd浓度为120mg/L时,地上部茎Cd含量和积累量达到最高值,分别为5672.50mg/kg、4.93mg/株。结果表明,钻叶紫菀是一种新的Cd超积累植物,为今后探明植物超积累Cd的机理和Cd污染土壤的植物修复提供一种新的种质资源。Aster subulatus Michx.(AsM)was discovered and identified asa new cadmium(Cd)hyperaccumulatorthrough field investigation andexperiment of sand-based nutrient solution culture in greenhouse.The investigationresults showed that AsM had strong tolerance,absorption and accumulation ability to high content Cd in soil,Cd content in stem and leaf of above-ground parts were 90.0—150.7mg/kg and 119.8—172.6mg/kg,respectively,with mean values of132.8mg/kg and 139.2mg/kg,respectively.The experiment of sand-based nutrient solution culture demonstrated that AsM had a strong tolerance to Cd in the growth medium.When Cd concentration was up to 150mg/L in the growth medium,the plants still grew normally,and there was no significant difference between the plant height and the control.The content and accumulation of Cd in shoot gradually increased asCd concentrationincreased in growth medium.When Cd concentration reached 120mg/L in the growth medium,the content and accumulation of Cd in stem reached the highest value,which were 5672.50mg/kg and 4.93mg/plant,respectively.The results suggested that AsM was a new species of Cd hyperaccumulator,which provided a new germplasm resource for future studying the mechanism of Cd hyperaccumulation and phytoremediation of Cd contaminated soil.

关 键 词：钻叶紫菀 镉 超积累植物 耐性 

分 类 号：X53[环境科学与工程—环境工程] X173