Antonie van Leeuwenhoek

, Volume 94, Issue 1, pp 51–62

An assessment of actinobacterial diversity in the marine environment

Original Paper

DOI: 10.1007/s10482-008-9239-x

Cite this article as:
Jensen, P.R. & Lauro, F.M. Antonie van Leeuwenhoek (2008) 94: 51. doi:10.1007/s10482-008-9239-x


The 16S rRNA gene sequence diversity within the Phylum Actinobacteria was assessed from four sources: PCR-generated V6 sequence tags derived from seawater samples, metagenomic data from the Global Ocean Sampling (GOS) expedition, marine-derived sequences maintained in the Ribosomal Database Project (RDP), and select cultured strains for which sequence data is not yet available in the RDP. This meta-analysis revealed remarkable levels of phylogenetic diversity and confirms the existence of major, deeply rooted, and as of yet uncharacterized lineages within the phylum. A dramatic incongruence among cultured strains and those detected using culture-independent techniques was also revealed. Redundancy among the actinobacteria detected using culture-independent techniques suggests that greater sequence coverage or improved DNA extraction efficiencies may be required to detect the rare phylotypes that can be readily cultured from marine samples. Conversely, new strategies need to be developed for the cultivation of frequently observed but yet to be cultured marine actinobacteria.


Marine actinobacteriaBacterial diversityMetagenomicsActinomycetes

Copyright information

© Springer Science+Business Media B.V. 2008

Authors and Affiliations

  1. 1.Scripps Institution of OceanographyUniversity of California San DiegoLa JollaUSA
  2. 2.Environmental Microbiology Initiative, School of Biotechnology and Biomolecular SciencesThe University of New South WalesSydneyAustralia