期刊
MARINE POLLUTION BULLETIN
卷 94, 期 1-2, 页码 176-184出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.marpolbul.2015.02.032
关键词
Aerenchyma; Cortex thickness; Black mangrove; Neotropical estuary
资金
- Fundo de Apoio a Ciencia e Tecnologia (Facitec), Prefeitura de Vitoria, ES, Brazil [Proc. 012/2008]
- CNPq
- FACITEC
- FAPESP [Proc. 2014/04832-3]
Espirito Santo estuaries (Brazil) are impacted by industrial activities, resulting in contamination of water and sediments. This raise questions on biological uptake, storage and consequences of metal contamination to mangrove plants. The goal of this work was evaluating accumulation and translocation of metals from sediment to roots and leaves of Avicennia schaueriana, growing in areas with different degrees of contamination, correlating bioaccumulation with changes in its root anatomy. Highest bioconcentration factors (BCFs) were observed in plants growing in less polluted areas. Conversely, highest translocation factors were found in plants from highest polluted area, evidencing an adaptive response of A. schaueriana to less favourable conditions. Namely, the absorption of metals by roots is diminished when facing highest levels of metals in the environment; alternatively, plants seem to enhance the translocation to diminish the concentration of toxic metals in roots. Root also responded to highly polluted scenarios with modifications of its anatomy. (C) 2015 Elsevier Ltd. All rights reserved.
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