| Seasonal patterns in the sunlight sensitivity of bacterioplankton from Mediterranean surface coastal waters. | |
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MedLine Citation:
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PMID: 22092707 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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The sensitivity of coastal marine bacterioplankton to natural photosynthetically active radiation (PAR, 400-700 nm) and ultraviolet radiation (UVR, 280-400 nm) was evaluated in five experiments over a seasonal cycle in the Blanes Bay, NW Mediterranean Sea. Exposure to natural solar radiation generally inhibited bulk bacterial activities or damaged membrane integrity when irradiances were high (i.e., spring and summer experiments) and, in general, UVB (280-320 nm) accounted for most of the inhibition. When assessing activity ((3) H-leucine uptake) at the single-cell level by microautoradiography and rRNA probing, seasonally varying responses and sensitivities were found among bacterial groups. While autumn and winter irradiances seemed too low to cause changes in activity, variable effects were found in spring and summer. SAR11 was consistently inhibited by UVR and PAR exposure whereas Gammaproteobacteria and Bacteroidetes showed higher resistance. Roseobacter, Synechococcus and the NOR5 clade were occasionally photostimulated in their activity, mainly due to PAR. Our results indicate that a component of seasonality exists in the bacterial responses to solar radiation, which vary not only depending on the irradiance and the spectral characteristics, but also on the previous light history and the taxonomic composition of the community. |
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Authors:
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Clara Ruiz-González; Thomas Lefort; Martí Galí; M Montserrat Sala; Ruben Sommaruga; Rafel Simó; Josep M Gasol |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-11-12 |
Journal Detail:
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Title: FEMS microbiology ecology Volume: - ISSN: 1574-6941 ISO Abbreviation: - Publication Date: 2011 Nov |
Date Detail:
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Created Date: 2011-11-18 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8901229 Medline TA: FEMS Microbiol Ecol Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
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© 2011 Federation of European Microbiological Societies. Published by Blackwell Publishing Ltd. All rights reserved. |
Affiliation:
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Institut de Ciències del Mar-CSIC, Pg. Marítim de la Barceloneta 37-49, 08003, Barcelona, Catalunya, Spain. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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