Data/hora: 10/06/2024 17:07:48

Provedor de dados: 	61	
País: 	Brazil	
Título: 	Physiological responses of Eichhornia crassipes [Mart.] Solms to the combined exposure to excess nutrients and Hg	
Autores: 	Caldelas,Cristina; Iglesia-Turiño,Santiago; Araus,Jose L.; Bort,Jordi; Febrero,Anna.	
Data: 	2009-01-01	
Ano: 	2009	
Palavras-chave: 	Abiotic stress; Metal accumulation; Multiple stress; Phytoremediation; Water eutrophication; Water pollution.	
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.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202009000100002	
Editor: 	Brazilian Journal of Plant Physiology	
Relação: 	10.1590/S1677-04202009000100002	
Formato: 	text/html	
Fonte: 	Brazilian Journal of Plant Physiology  v.21 n.1 2009	
Fonte: 	info:eu-repo/semantics/openAccess