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vol.103 número9-10Deterioration of San rock art: new findings, new challengesMicrobiological analysis of banknotes circulating in the Venda region of Limpopo province, South Africa índice de autoresíndice de assuntospesquisa de artigos
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South African Journal of Science

versão On-line ISSN 1996-7489

Resumo

NKOANE, Bonang B.M. et al. Examination of Blepharis aspera as a possible Cu-Ni indicator plant. S. Afr. j. sci. [online]. 2007, vol.103, n.9-10, pp. 363-364. ISSN 1996-7489.

BLEPHARIS ASPERA WAS COLLECTED FROM A copper-nickel mineralized area in Botswana and examined as a possible Cu-Ni indicator plant for biogeochemical prospecting. Different plant parts and the host soils were analysed using ultrasonic slurry sampling electrothermal atomic absorption spectrometry. All plant parts accumulated Cu and Ni in above-normal amounts, although not in hyperaccumulator concentrations. The leaf to soil concentration ratio varied little with metal concentration in the soil. We propose Blepharis aspera as a Cu indicator plant. The accumulation behaviour of Blepharis aspera is compared with another previously studied metallophyte, Helichrysum candolleanum, that is growing in the same area.

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