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Multiple tolerance and co-tolerance to heavy metals in Silene vulgaris: a co-segregation analysis

Published online by Cambridge University Press:  01 July 1997

HENK SCHAT  and
RIET VOOIJS
HENK SCHAT
Affiliation:
Faculty of Biology, Department of Ecology and Ecotoxicology, Vrije Universiteit Amsterdam, De Boelelaan 1087, 1081 HV Amsterdam, The Netherlands
RIET VOOIJS
Affiliation:
Faculty of Biology, Department of Ecology and Ecotoxicology, Vrije Universiteit Amsterdam, De Boelelaan 1087, 1081 HV Amsterdam, The Netherlands
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Abstract

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 by-product of the tolerance allele of one particular locus for zinc tolerance.

Keywords

Silene vulgarismetal tolerancegeneticsco-segregation
Type
Research Article
Information
The New Phytologist , Volume 136 , Issue 3 , July 1997 , pp. 489 - 496
Copyright
© Trustees of the New Phytologist 1997

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