Zinc and cadmium accumulation and tolerance in populations of Sedum alfredii
Zinc and cadmium accumulation and tolerance in populations of Sedum alfredii
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景天种群锌、镉的积累及耐受性
DOI：
10.1016/j.envpol.2006.05.024
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发表时间：
2007-05-01
影响因子：
8.9
通讯作者：
Wong, M. H.
中科院分区：
文献类型：
--
作者：
Deng, D. M.;Shu, W. S.;Wong, M. H.
为研究东南景天（Sedumalfredii）对Zn、Cd的吸收和耐性的变化，对浙江、湖南两省老铅锌矿和广东“清洁”点的东南景天（Sedumalfredii）3个居群进行了野外调查和水培试验。在田间条件下，ZJ和HN植株地上部中Zn含量分别为12，524和12，253 mg kg（-1），Cd含量分别为1400和97 mg kg（-1）。水培条件下，ZJ和HN植株叶片和茎中Zn和Cd的积累量显著高于GD植株，且对Zn和Cd的耐性显著高于GD植株。在两个污染群体中，ZJ植株表现出比HN植株更高的Cd耐性和累积量。结果表明，不同种群对Zn、Cd的积累和耐性存在显著差异。alfredii。(C)2006爱思唯尔有限公司保留所有权利。
To investigate the variation of Zn and Cd accumulation and tolerance of Sedum alfredii (a newly reported Zn/Cd hyperaccumulator), field surveys and hydroponic experiments were conducted among three populations of this species: two originating from old Pb/Zn mines in Zhejiang (ZJ) and Hunan (HN) Provinces and one from a "clean" site in Guangdong (GD) Province, China. Under field conditions, up to 12,524 and 12,253 mg kg(-1) Zn, and 1400 and 97 mg kg(-1) Cd in shoots of ZJ and HN plants were recorded respectively. Under hydroponic conditions, ZJ and HN plants accumulated significantly higher Zn and Cd in their leaves and stems, and possessed significantly higher Zn and Cd tolerance than GD plants. Among the two contaminated populations, ZJ plants showed higher Cd tolerance and accumulation (in leaves) than HN plants. The present results indicate that significant differences in Zn and Cd accumulation and tolerance exist in populations of S. alfredii. (C) 2006 Elsevier Ltd. All rights reserved.