Differential metal-specific tolerance and accumulation patterns among Thlaspi caerulescens populations originating from different soil types
Differential metal-specific tolerance and accumulation patterns among Thlaspi caerulescens populations originating from different soil types
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DOI：
10.1046/j.1469-8137.2003.00819.x
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发表时间：
2003-08-01
期刊：
影响因子：
9.4
通讯作者：
Ernst, WHO
中科院分区：
文献类型：
--
作者：
Assunçao, AGL;Bookum, WM;Ernst, WHO
在这里，来自不同土壤类型的Thlaspi caerulescens种群（蛇纹石，炉甘石和非金属）的特点是关于耐受性，吸收和转运的锌（Zn），结果表明，高水平的耐性明显表现为重金属-特定的，仅限于在人口现场的土壤中富集在有毒水平的金属。关于金属积累，结果表明，与Zn的超积累不同，Cd和Ni的超积累在物种水平上不是组成性的。在一般情况下，研究中的人口表现出明显的不相关和金属吸收，根到地上部的转运，和耐受性的变化，锌，镉和镍。这些性状的明显种内变异为超积累性状的进一步遗传和生理解剖提供了极好的机会。
Here, Thlaspi caerulescens populations from contrasting soil types (serpentine, calamine and nonmetalliferous) were characterized with regard to tolerance, uptake and translocation of zinc (Zn), cadmium (Cd) and nickel (Ni) in hydroponic culture.Results showed that high-level tolerances were apparently metal-specific and confined to the metals that were enriched at toxic levels in the soil at the population site.With regard to metal accumulation, results suggested that, unlike Zn hyperaccumulation, Cd and Ni hyperaccumulation were not constitutive at the species level in T. caerulescens .In general, the populations under study exhibited a pronounced uncorrelated and metal-specific variation in uptake, root to shoot translocation, and tolerance of Zn, Cd and Ni. The distinct intraspecific variation of these characters provides excellent opportunities for further genetic and physiological dissection of the hyperaccumulation trait.