PCR Analysis of the Distribution of Unicellular Cyanobacterial Diazotrophs in the Arabian Sea
| Autor: | Nicholas J. Fuller, Sophie Mazard, Dave J. Scanlan, Oliver Bridle, Karen M. Orcutt |
|---|---|
| Rok vydání: | 2004 |
| Předmět: |
Cyanobacteria
food.ingredient Cyanothece Molecular Sequence Data Oligonucleotide Primer DNA Ribosomal Polymerase Chain Reaction Sensitivity and Specificity Applied Microbiology and Biotechnology Microbial Ecology food Water column Phylogenetics Nitrogen Fixation RNA Ribosomal 16S Botany Seawater Phylogeny Base Sequence Ecology biology Temperature Sequence Analysis DNA Crocosphaera watsonii biology.organism_classification 16S ribosomal RNA Diazotroph Oligonucleotide Probes Food Science Biotechnology |
| Zdroj: | Applied and Environmental Microbiology. 70:7355-7364 |
| ISSN: | 1098-5336 0099-2240 3327-3332 |
| DOI: | 10.1128/aem.70.12.7355-7364.2004 |
| Popis: | An oligonucleotide primer, NITRO821R, targeting the 16S rRNA gene of unicellular cyanobacterial N 2 fixers was developed based on newly derived sequences from Crocosphaera sp. strain WH 8501 and Cyanothece sp. strains WH 8902 and WH 8904 as well as several previously described sequences of Cyanothece sp. and sequences of intracellular cyanobacterial symbionts of the marine diatom Climacodium frauenfeldianum . This oligonucleotide is specific for the targeted organisms, which represent a well-defined phylogenetic lineage, and can detect as few as 50 cells in a standard PCR when it is used as a reverse primer together with the cyanobacterium- and plastid-specific forward primer CYA359F (U. Nübel, F. Garcia-Pichel, and G. Muyzer, Appl. Environ. Microbiol. 63: 3327-3332, 1997). Use of this primer pair in the PCR allowed analysis of the distribution of marine unicellular cyanobacterial diazotrophs along a transect following the 67°E meridian from Victoria, Seychelles, to Muscat, Oman (0.5°S to 26°N) in the Arabian Sea. These organisms were found to be preferentially located in warm (>29°C) oligotrophic subsurface waters between 0 and 7°N, but they were also found at a station north of Oman at 26°N, 56°35′E, where similar water column conditions prevailed. Slightly cooler oligotrophic waters ( |
| Databáze: | OpenAIRE |
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