Affiliation:
1. Max-Planck-Institut für Marine Mikrobiologie, Bremen, Germany
Abstract
ABSTRACT
Fluorescence in situ hybridization (FISH) with rRNA-targeted oligonucleotide probes was used to investigate the phylogenetic composition of bacterioplankton communities in several freshwater and marine samples. An average of about 50% of the cells were detected by probes for the domains
Bacteria
and
Archaea
, and of these, about half could be identified at the subdomain level with a set of group-specific probes. Beta subclass proteobacteria constituted a dominant fraction in freshwater systems, accounting for 16% (range, 3 to 32%) of the cells, although they were essentially absent in the marine samples examined. Members of the
Cytophaga-Flavobacterium
cluster were the most abundant group detected in the marine systems, accounting for 18% (range, 2 to 72%) of the 4′,6-diamidino-2-phenylindole (DAPI) counts, and they were also important in freshwater systems (7%, range 0 to 18%). Furthermore, members of the alpha and gamma subclasses of
Proteobacteria
as well as members of the
Planctomycetales
were detected in both freshwater and marine water in abundances <7%.
Publisher
American Society for Microbiology
Subject
Ecology,Applied Microbiology and Biotechnology,Food Science,Biotechnology
Cited by
551 articles.
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