Re-examination of the elemental composition of some Caryophyllaceae on North American ultramafic soils
Re-examination of the elemental composition of some Caryophyllaceae on North American ultramafic soils
复制标题
DOI：
10.1007/s11284-017-1556-y
复制
发表时间：
2018-07-01
影响因子：
2
通讯作者：
Kruckeberg, Arthur R.
中科院分区：
文献类型：
--
作者：
Reeves, Roger D.;Kruckeberg, Arthur R.
克鲁克伯格等人的论文。 (1993) 报道了美国华盛顿州奥利文桥超镁铁质地点的红火蚁 (Arenaria rubella) 对镍的超积累。该出版物的几个方面导致作者怀疑数据的可靠性，从而导致对该物种在该地点的行为进行重新调查。随后，在不同年份的橄榄石桥对两种石竹科植物风疹和角藻进行了广泛采样，并采集了土壤样本。植物样本经过各种方式处理，试图减少土壤污染的潜在影响。这项工作的结果表明，风疹 A. rubella 和 C. arvense 在从超镁铁质土壤中吸收镍方面均表现正常。镍、铁、钴、铬和镁元素的含量仅为早期工作中报告的含量的 1/10-1/100。早期研究的弱点导致人们对假定的镍超富集的几个方面进行了考虑，特别是应用于石竹科物种时。特别重要的是清洗程序、分析材料的选择以及使用各种标准来评估植物样品土壤污染的可能性。现在建议仔细重新检查其他几起石竹科成员报告的镍超积累案例。
A paper of Kruckeberg et al. (1993) reported the hyperaccumulation of nickel by Arenaria rubella at an ultramafic site at Olivine Bridge in the state of Washington, USA. Several aspects of the publication led the present authors to doubt the reliability of the data, leading to a reinvestigation of the behaviour of this species at this site. Extensive sampling of two species of the Caryophyllaceae, A. rubella and Cerastium arvense, was then carried out at Olivine Bridge in two different years, together with the collection of soil samples. The plant samples were treated in various ways in an attempt to reduce the potential influence of soil contamination. The results of this work indicate that A. rubella and C. arvense both behave in a normal way in respect of their nickel uptake from ultramafic soil. The elements nickel, iron, cobalt, chromium and magnesium have been found at levels only 1/10-1/100 of those reported in the earlier work. The weaknesses in the earlier study have led to a consideration of several aspects of putative nickel hyperaccumulation, especially as applied to species in the Caryophyllaceae. Particularly important are washing procedures, selection of material for analysis, and the use of various criteria for assessing the likelihood of soil contamination of plant samples. A careful re-examination of several other reported cases of nickel hyperaccumulation by members of the Caryophyllaceae is now recommended.