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| Format: | Artículo científico |
| Language: | en |
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Universidad Autónoma de Baja California
2000
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| Online Access: | https://www.redalyc.org/articulo.oa?id=48026105 |
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Table of Contents:
- Pigment variations induced by the oxygen level of the medium in a marine bacterium Alteromonas sp. (Strain cect 4800) Olimpio Montero Ignacio Moreno Garrido Manuel A. González del Valle Luis M. Lubián Ciencias de la Tierra HPLC pigment Alteromonas sp marine bacteria molecular oxygen A red-pigmented bacterial strain was isolated from indoor cultures of the marine microalgaTetraselmis suecica Butcher (Prasynophyceae) and identified as belonging to the genus Alteromonas(strain CECT 4800). Pigment composition was analyzed by means of high-performance liquidchromatography (HPLC), and spectral characteristics of three major pigments with reddish and yellowishcolorations were determined. Changes in pigment composition during growth in liquid mediumcontaining either ferric citrate, sodium citrate, glucose or glucose plus iron, as well as in relation to theoxygen concentration in the liquid medium were investigated. Pigment production was found to beenhanced with culture aging, the highest enhancement occurring in iron-deprived cultures. An increase inthe major pigment (a red pigment) content of 70% in relation to the initial one took place when a culturefed with ferric citrate was bubbled with molecular oxygen. In contrast, red pigment content decreased toabout 50% of the initial content when the culture was sparged with nitrogen. Other pigments did notexhibit substantial modifications. Increase in the red pigment content was also observed after thedifferent cultures were exposed to diverse oxygen concentrations for one hour. Similar results wereobtained in cultures submitted to both strong aeration and agitation (5 mL min1 air and 500 rpm,respectively). Findings of this study suggest that pigment production by Alteromonas sp. (strain CECT4800), in particular that of the red pigment, could rely on the oxygen concentration in the culture mediumdue to antioxidative reactions. 2000 artículo científico 0185-3880 https://www.redalyc.org/articulo.oa?id=48026105 en http://www.redalyc.org/revista.oa?id=480 Ciencias Marinas application/pdf Universidad Autónoma de Baja California Ciencias Marinas (México) Num.1 Vol.26