Molecular diversity among marine picophytoplankton as revealed by psbA analyses

Gil Zeidner, Christina M. Preston, Edward F. Delong, Ramon Massana, Anton F. Post, David J. Scanlan, Oded Béjà

Research output: Contribution to journalArticlepeer-review


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 μm (picoplankton). Here, we report on molecular analyses of the conserved photosynthetic psbA gene (coding for protein D1 of photosystern 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.

Original languageEnglish
Pages (from-to)212-216
Number of pages5
JournalEnvironmental Microbiology
Issue number3
StatePublished - 1 Mar 2003
Externally publishedYes

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Microbiology


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