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New insights into t...
New insights into the ecology of the globally significant uncultured nitrogen-fixing symbiont UCYN-A
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- Farnelid, Hanna (författare)
- Linnéuniversitetet,Institutionen för biologi och miljö (BOM),Univ Calif Santa Cruz, Ocean Sci Dept, Santa Cruz, CA 95064 USA,Ctr Ecol & Evolut Microbial Model Syst EEMiS
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- Turk-Kubo, Kendra (författare)
- Univ Calif Santa Cruz, USA
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- del Carmen Munoz-Marin, Maria (författare)
- Univ Calif Santa Cruz, USA ; Univ Cordoba, Spain
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- Zehr, Jonathan P. (författare)
- Univ Calif Santa Cruz, USA
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(creator_code:org_t)
- Inter-Research Science Center, 2016
- 2016
- Engelska.
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Ingår i: Aquatic Microbial Ecology. - : Inter-Research Science Center. - 0948-3055 .- 1616-1564. ; 77:3, s. 125-138
- Relaterad länk:
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https://www.int-res....
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https://urn.kb.se/re...
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https://doi.org/10.3...
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Abstract
Ämnesord
Stäng
- Cyanobacterial nitrogen-fixers (diazotrophs) play a key role in biogeochemical cycling of carbon and nitrogen in the ocean. In recent years, the unusual symbiotic diazotrophic cyanobacterium Atelocyanobacterium thalassa (UCYN-A) has been recognized as one of the major diazotrophs in the tropical and subtropical oceans. In this review, we summarize what is currently known about the geographic distribution of UCYN-A, as well as the environmental factors that govern its distribution. In addition, by compiling UCYN-A nifH sequences from the GenBank no. database as well as those from nifH gene amplicon next generation sequencing studies, we present an in-depth analysis of the distribution of defined UCYN-A sublineages (UCYN-A1, UCYN-A2 and UCYN-A3) and identify a novel sublineage, UCYN-A4, which may be significant in some environments. Each UCYN-A sublineage exhibited a remarkable global distribution pattern and several UCYN-A sublineages frequently co-occurred within the same sample, suggesting that if they represent different ecotypes they have overlapping niches. Recently, single cell visualization techniques using specific probes targeting UCYN-A1 and UCYN-A2 and their respective associated eukaryotic partner cells showed that the size of the consortia and the number of UCYN-A cells differed between these 2 sublineages. Combined, the results highlight that UCYN-A sublineages likely have different physiological requirements, which need to be accounted for in future studies. Furthermore, based on our increasing knowledge of the diversity of the UCYN-A lineage, we discuss some of the limitations of currently used cultivation-independent molecular techniques for the identification and quantification of UCYN-A.
Ämnesord
- NATURVETENSKAP -- Biologi -- Ekologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Ecology (hsv//eng)
- NATURVETENSKAP -- Biologi -- Mikrobiologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Microbiology (hsv//eng)
Nyckelord
- UCYN-A
- Symbiosis
- nifH
- qPCR
- Next generation amplicon sequencing
- CARD-FISH
- Braarudosphaera bigelowii
- Akvatisk ekologi
- Aquatic Ecology
Publikations- och innehållstyp
- ref (ämneskategori)
- for (ämneskategori)
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