Data/hora: 12/06/2024 14:20:56

Provedor de dados: 	42	
País: 	Brazil	
Título: 	Copper Stress on Photosynthesis of Black Mangle (Avicennia germinans)	
Autores: 	GONZALEZ-MENDOZA,DANIEL; GIL,FRANCISCO ESPADAS y; ESCOBOZA-GARCIA,FERNANDO; SANTAMARIA,JORGE M.; ZAPATA-PEREZ,OMAR.	
Data: 	2013-06-01	
Ano: 	2013	
Palavras-chave: 	Avicennia germinans; Chlorophyll fluorescence; Copper; Photosystem II; Photosynthesis.	
Resumo: 	The effects of copper toxicity on the photosynthetic activities of Avicennia germinans was investigated using two CuSO4 concentrations (0.062 and 0.33 M) added in Hoagland's solution in an aerated hydroponic system. Photosynthesis and chlorophyll fluorescence were measured after 30 h of copper stress. Results obtained in this study show that increasing levels of Cu+2 of 0.062 and 0.33 M Cu+2 resulted in a general reduction of the stomatal conductance (28 and 18%, respectively) and 100% of inhibition of net photosynthesis. Additionally, at these concentrations of Cu+2, reductions of chlorophyll fluorescence parameters were also observed. These changes suggested that the photosynthetic apparatus of Avicennia germinans was the primary target of the Cu+2 action. It is concluded that Cu+2 ions causes a drastic decline in photosynthetic gas exchange and Chlorophyll fluorescence parameters in A. germinans leaves.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652013000200665	
Editor: 	Academia Brasileira de Ciências	
Relação: 	10.1590/S0001-37652013000200013	
Formato: 	text/html	
Fonte: 	Anais da Academia Brasileira de Ciências  v.85 n.2 2013	
Fonte: 	info:eu-repo/semantics/openAccess