Título

Copper stress on photosynthesis of Black Mangle (Avicennia germinans)

Autor

DANIEL GONZALEZ MENDOZA

FRANCISCO LEONEL ESPADAS Y GIL

LUIS FERNANDO ESCOBOZA GARCIA

JORGE MANUEL SANTAMARIA FERNANDEZ

JOSE OMAR ZAPATA PEREZ

Nivel de Acceso

Acceso Abierto

Referencia de datos

doi: DOI: 10.1590/S0001-37652013000200013

Resumen o descripción

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.

Fecha de publicación

2013

Tipo de publicación

Artículo

Versión de la publicación

Versión publicada

Formato

application/pdf

Fuente

Anais da Academia Brasileira de Ciências, 85(2), 665-670, 2013

Idioma

Inglés

Relación

&

ZAPATA-PEREZ, O. M. A. R. (2013). Copper stress on photosynthesis of black mangle (Avicennia germinans). Anais da Academia Brasileira de Ciências, 85(2), 665-670.

Sugerencia de citación

Gonzalez-Mendoza, D., ESCOBOZA-GARCIA, F. E. R. N. A. N. D. O., SANTAMARIA, J. M.,

Repositorio Orígen

Repositorio Institucional CICY

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