Data/hora: 01/06/2024 08:25:55

Provedor de dados: | 5
País: | France
Título: | The decomposition of hydrogen peroxide by marine phytoplankton
Autores: | Wong, Gtf; Dunstan, Wm; Kim, Db.
Data: | 2003-04
Ano: | 2003
Palavras-chave: | Phytoplancton marin; Peroxyde d'hydrogène; Oxydo-réduction; Marine phytoplankton; Hydrogen peroxide; Oxidation-reduction.
Resumo: | All nine species of marine phytoplankton tested (a cyanobacterium: Synechococcus sp., three diatoms: Chaetoceros simplex, Thalassiosira oceanica and Skeletonema costatum, two prymnesiophytes: Pleurochrysis carterae and Isochrysis galbana, a prasinophyte: Tetraselmis sp., a green alga: Dunaliella tertiolecta, and a dinoflagellate: Amphidinium carterae) were able to decompose hydrogen peroxide in the dark. Since these phytoplankton species can be found widely in a variety of marine sub-environments, this indicates that the dark decomposition of hydrogen peroxide by phytoplankton is a general phenomenon in the oceans. The decomposition rates were first order with respect to the concentration of hydrogen peroxide and biomass. The second-order rate constants for these nine species of phytoplankton ranged between 2 x 10(-4) and 2.7 x 10(-2) mug Chl-a(-1) 1 h(-1). Synechococcus sp. and S. costatum were the most efficient, while P. carterae and D. tertiolecta were the least efficient decomposers. While the magnitudes and patterns in the changes were species-dependent, in general, increasing salinity, temperature, the presence of light and the depletion of nutrients enhanced the decomposition of hydrogen peroxide. The effect of growth phase was small.
Tipo: | Text
Idioma: | Inglês

Identificador:

http://archimer.ifremer.fr/doc/00322/43276/43007.pdf

DOI:10.1016/S0399-1784(02)00006-3

http://archimer.ifremer.fr/doc/00322/43276/

Editor: | Gauthier-villars/editions Elsevier
Formato: | application/pdf
Fonte: | Oceanologica Acta (0399-1784) (Gauthier-villars/editions Elsevier), 2003-04 , Vol. 26 , N. 2 , P. 191-198

Fonte:

2003 Éditions scientifiques et médicales Elsevier SAS. All rights reserved.

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