Molecular diversity among marine picophytoplankton as revealed by psbA analyses |
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| Authors: | Zeidner Gil Preston Christina M Delong Edward F Massana Ramon Post Anton F Scanlan David J Béjà Oded |
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| Affiliation: | Department of Biology, Technion-Israel Institute of Technology, Haifa 32000, Israel.; Monterey Bay Aquarium Research Institute, Moss Landing, CA 95039-0628, USA.; Departament de Biologia Marina i Oceanografia, Institut de Ciències del Mar, CSIC, E-08003 Barcelona, Spain.; H. Steinitz Marine Biology Laboratory, Interuniversity Institute for Marine Sciences, Eilat 88103, and Department of Microbial and Molecular Ecology, Hebrew University of Jerusalem, Jerusalem, Israel.; Department of Biological Sciences, University of Warwick, Coventry CV4 7AL, UK. |
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| Abstract: | Photosynthetic microorganisms play a crucial role in the marine environment. In vast areas of the oceans, marine primary productivity is performed by cells smaller than 2-3 micro m (picoplankton). Here, we report on molecular analyses of the conserved photosynthetic psbA gene (coding for protein D1 of photosystem II reaction centre) as a diversity indicator of naturally occurring marine oxygenic picophytoplankton. The psbA genes proved to be good indicators of the presence of a wide variety of photosynthetic marine microbial groups, including new cyanobacterial groups and eukaryotic algae (prasinophytes). Furthermore, using environmental bacterial artificial chromosome (BAC) libraries, we were able to correlate psbA genes with small subunit rRNAs and, therefore, to confirm their phylogenetic affiliation. |
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