Mechanisms of copper tolerance by Armeria maritima in Dolfrwynog Bog, North Wales -: Initial studies
Mechanisms of copper tolerance by Armeria maritima in Dolfrwynog Bog, North Wales -: Initial studies
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DOI：
10.1023/a:1021225721605
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发表时间：
2003-01-01
影响因子：
4.2
通讯作者：
Farago, ME
中科院分区：
文献类型：
--
作者：
Brewin, LE;Mehra, A;Farago, ME
2000年7月在Dolfrwynog沼泽地进行了初步实地研究。重复样品的水，Armeria maritima植物和土壤附着在其根部收集和分析铜。据记录，土壤中铜的浓度高达6486 mg kg（-1）。植物对铜的富集以富集系数（CF）表示，表明植物主要起铜的排斥作用。在吸收的铜中，大部分被保留在根部，很少被运输到植物的芽中。此外，另一种可能的耐受机制是通过其腐烂的叶子分泌铜。利用离体培养技术研究铜耐受机制。已经开发了一种微繁殖方案。离体植物已经在堆肥中生根并建立。
Preliminary field studies were carried out at Dolfrwynog Bog in July 2000. Replicate samples of water, Armeria maritima plants and the soils adhering to its roots were collected and analysed for copper. Concentrations of up to 6486 mg kg(-1) of copper in the soils were recorded. Accumulation of copper by the plant as expressed by concentration factors (CF) show that it is acting mainly as a copper excluder. Of the copper that is taken up, most of it is retained within the roots with very little being transported to the shoots of the plant. Moreover, a further possible mechanism of tolerance is exhibited by the excretion of copper through its decaying leaves. Towards the use of in vitro cultures to study the copper tolerance mechanisms in A. maritima a micropropagation protocol has been developed. The ex vitro plants have been rooted and established in compost.