| Registro completo |
| Provedor de dados: |
Braz. J. Plant Physiol.
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| País: |
Brazil
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| Título: |
Physiological responses of Eichhornia crassipes [Mart.] Solms to the combined exposure to excess nutrients and Hg
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| Autores: |
Caldelas,Cristina
Iglesia-Turiño,Santiago
Araus,Jose L.
Bort,Jordi
Febrero,Anna
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| Data: |
2009-01-01
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| Ano: |
2009
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| Palavras-chave: |
Abiotic stress
Metal accumulation
Multiple stress
Phytoremediation
Water eutrophication
Water pollution
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| Resumo: |
In the present study the physiological response of water hyacinth (Eichhornia crassipes [Mart.] Solms) to the combined exposure of excess nutrients and Hg was examined. Young water hyacinth plants were exposed to a range of HgCl2 and KNO3 concentrations. After eight weeks, submerged plant tissues reached an Hg concentration of 4 mg g-1. The accumulation of P and S was reduced by the addition of HgCl2, and also the P and K concentrations in emerged and submerged parts decreased. In contrast, the addition of HgCl2 increased Ca and Mg concentrations in submerged parts. Furthermore, the concentration ratios of submerged/emerged parts for Ca, Mg and P were also reduced by the addition of HgCl2. The interaction of HgCl2 and KNO3 was synergistic and decreased Fv/Fm, total chlorophyll content and P and Mn concentrations in emerged parts. In submerged plant parts Ca concentration increased and K content stabilized as a result of the above interaction. However, the total accumulation of Hg per plant was not reduced, thereby confirming the water hyacinth as a promising candidate for the heavy metal phytoremediation of eutrophic waters.
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| Tipo: |
Info:eu-repo/semantics/article
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| Idioma: |
Inglês
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| Identificador: |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202009000100002
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| Editor: |
Brazilian Journal of Plant Physiology
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| Relação: |
10.1590/S1677-04202009000100002
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| Formato: |
text/html
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| Fonte: |
Brazilian Journal of Plant Physiology v.21 n.1 2009
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| Direitos: |
info:eu-repo/semantics/openAccess
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