Multiple tolerance and co-tolerance to heavy metals in Silene vulgaris: a co-segregation analysis.
Multiple tolerance and co-tolerance to heavy metals in Silene vulgaris: a co-segregation analysis.
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DOI：
10.1046/j.1469-8137.1997.00756.x
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发表时间：
1997-07
期刊：
影响因子：
--
通讯作者：
H. Schat;R. Vooijs
中科院分区：
文献类型：
--
作者：
H. Schat;R. Vooijs
来自含金属土壤的植物通常表现出对不同重金属的综合耐受性。这种耐受性可能依赖于拥有不同金属特异性耐受机制的组合（“多重耐受性”），或者依赖于多效性赋予不同金属耐受性的不太特定的机制（“共同耐受性”）。在这项研究中，我们研究了在具有明显耐受性的 Silene vulgaris (Moench) Garcke 生态型之间的杂交中对铜、锌、镍、钴和镉的耐受性的共分离。结果证明了对铜、锌和镉的耐受性的非多效性遗传控制。另一方面，对镍和钴的耐受性似乎代表了锌耐受性的一个特定位点的耐受等位基因的多效性副产品。
Plants from metalliferous soils often exhibit combined tolerance to different heavy metals. Such tolerance could rely either on the possession of a combination of different metal-specific tolerance mechanisms ('multiple tolerance'), or on less specific mechanisms that pleiotropically confer tolerance to different metals ('co-tolerance'). In this study, we examined the co-segregation of tolerances to Cu, Zn, Ni, Co and Cd in crosses between distinctly tolerant ecotypes of Silene vulgaris (Moench) Garcke. The results demonstrate non-pleiotropic genetic control of tolerance to Cu, Zn and Cd. Tolerance to Ni and Co, on the other hand, seems to represent the pleiotropic byproduct of the tolerance allele of one particular locus for zinc tolerance.