Accumulators and excluders ‐strategies in the response of plants to heavy metals
- 1 January 1981
- journal article
- research article
- Published by Taylor & Francis Ltd in Journal of Plant Nutrition
- Vol. 3 (1-4), 643-654
- https://doi.org/10.1080/01904168109362867
Abstract
Plants colonizing metalliferous soils have evolved physiological mechanisms which enable them to tolerate metal toxicity. These mechanisms do not generally suppress metal uptake but result in internal detoxification. Two basic strategies of plant response are suggested, accumulators and excluders. In the former, metals can be concentrated in plant parts from low or high background levels. By contrast, differential uptake and transport between root and shoot in excluders, lead to more or less constant low shoot levels over a wide range of external concentration. ‘Indicators’ are seen as a further mode of response where proportional relationships exist between metal levels in the soil, uptake and accumulation in plant parts. The physiological properties of accumulator and excluder species are considered in relation to metal tolerance mechanisms.Keywords
This publication has 15 references indexed in Scilit:
- PROBLEMS OF INTERPRETING THE RELATIONSHIP BETWEEN THE AMOUNTS OF LEAD AND ZINC IN PLANTS AND SOIL ON METALLIFEROUS WASTESNew Phytologist, 1978
- ECOPHYSIOLOGICAL ASPECTS OF ZINC TOLERANCE IN SILENE MARITIMA WITH.New Phytologist, 1978
- Cadmium Uptake and Distribution in Tolerant and Non-Tolerant Populations of Holcus lanatus Grown in Solution CultureOikos, 1978
- Metal Accumulation by Some Plants Growing on Zinc-Mine DepositsOikos, 1977
- ZINC, LEAD AND COPPER TOLERANCE IN THE GRASS STEREOCHLAENA CAMERONII (STAPF) CLAYTONNew Phytologist, 1973
- Copper Tolerance in Becium hombleiNature, 1971
- Heavy Metal Tolerance in PlantsPublished by Elsevier BV ,1971
- The Significance of Essential and Non-Essential Trace Elements in Plants in Relation to Biogeochemical ProspectingJournal of Applied Ecology, 1970
- THE SUBCELLUAR DISTRIBUTION OF ZINC AND COPPER WITHIN THE ROOTS OF METAL‐TOLERANT CLONES OF AGROSTIS TENUIS SIBTH.New Phytologist, 1970
- The Distribution of Zinc-65 inAgrostis tenuissibth. andA. stoloniferaL. Tissues4Journal of Experimental Botany, 1969