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Distinct ecological...
Distinct ecological niches of marine symbiotic N2-fixing cyanobacterium Candidatus Atelocyanobacterium thalassa sublineages
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- Turk-Kubo, Kendra A. (författare)
- University of California, USA
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- Farnelid, Hanna (författare)
- Linnéuniversitetet,Institutionen för biologi och miljö (BOM),University of California, USA,Ctr Ecol & Evolut Microbial Model Syst EEMiS,EcoChange
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- Shilova, Irina N. (författare)
- University of California, USA
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- Henke, Britt (författare)
- University of California, USA
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- Zehr, Jonathan P. (författare)
- University of California, USA
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(creator_code:org_t)
- 2017-01-28
- 2017
- Engelska.
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Ingår i: Journal of Phycology. - : John Wiley & Sons. - 0022-3646 .- 1529-8817. ; 53:2, s. 451-461
- Relaterad länk:
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https://rss.onlineli...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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https://urn.kb.se/re...
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Abstract
Ämnesord
Stäng
- A recently described symbiosis between the metabolically streamlined nitrogen-fixing cyanobacterium UCYN-A and a single-celled eukaryote prymnesiophyte alga is widely distributed throughout tropical and subtropical marine waters, and is thought to contribute significantly to nitrogen fixation in these regions. Several UCYN-A sublineages have been defined based on UCYN-A nitrogenase (nifH) sequences. Due to the low abundances of UCYN-A in the global oceans, currently existing molecular techniques are limited for detecting and quantifying these organisms. A targeted approach is needed to adequately characterize the diversity of this important marine cyanobacterium, and to advance understanding of its ecological importance. We present findings on the distribution of UCYN-A sublineages based on high throughput sequencing of UCYN-A nifH PCR amplicons from 78 samples distributed throughout many major oceanic provinces. These UCYN-A nifH fragments were used to define oligotypes, alternative taxonomic units defined by nucleotide positions with high variability. The data set was dominated by a single oligotype associated with the UCYN-A1 sublineage, consistent with previous observations of relatively high abundances in tropical and subtropical regions. However, this analysis also revealed for the first time the widespread distribution of the UCYN-A3 sublineage in oligotrophic waters. Furthermore, distinct assemblages of UCYN-A oligotypes were found in oligotrophic and coastally influenced waters. This unique data set provides a framework for determining the environmental controls on UCYN-A distributions and the ecological importance of the different sublineages.
Ämnesord
- NATURVETENSKAP -- Biologi -- Mikrobiologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Microbiology (hsv//eng)
Nyckelord
- Candidatus Atelocyanobacterium thalassa
- UCYN-A
- nifH
- Nitrogen fixation
- Nitrogenase
- Oligotyping
- Mikrobiologi
- Microbiology
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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