The mesopelagic anoxic Black Sea as an unexpected habitat for Synechococcus challenges our understanding of global deep red fluorescence

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60077344%3A_____%2F19%3A00506097" target="_blank" >RIV/60077344:_____/19:00506097 - isvavai.cz</a>

Result on the web

<a href="https://www.nature.com/articles/s41396-019-0378-z.pdf" target="_blank" >https://www.nature.com/articles/s41396-019-0378-z.pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1038/s41396-019-0378-z" target="_blank" >10.1038/s41396-019-0378-z</a>

Result language

angličtina

Original language name

The mesopelagic anoxic Black Sea as an unexpected habitat for Synechococcus challenges our understanding of global deep red fluorescence

Original language description

The Black Sea is the largest meromictic sea with a reservoir of anoxic water extending from 100 to 1000 m depth. These deeper layers are characterised by a poorly understood fluorescence signal called deep red fluorescence, a chlorophyll a-(Chl a) like signal found in deep dark oceanic waters. In two cruises, we repeatedly found up to 10(3) cells ml(-1) of picocyanobacteria at 750 m depth in these waters and isolated two phycoerythrin-rich Synechococcus sp. strains (BS55D and BS56D). Tests on BS56D revealed its high adaptability, involving the accumulation of Chl a in anoxic/dark conditions and its capacity to photosynthesise when re-exposed to light. Whole-genome sequencing of the two strains showed the presence of genes that confirms the putative ability of our strains to survive in harsh mesopelagic environments. This discovery provides new evidence to support early speculations associating the deep red fluorescence signal to viable picocyanobacteria populations in the deep oxygen-depleted oceans, suggesting a reconsideration of the ecological role of a viable stock of Synechococcus in dark deep waters.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10606 - Microbiology

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2019

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

The ISME Journal

ISSN

1751-7362

e-ISSN

—

Volume of the periodical

13

Issue of the periodical within the volume

7

Country of publishing house

GB - UNITED KINGDOM

Number of pages

12

Pages from-to

1676-1687

UT code for WoS article

000472152300004

EID of the result in the Scopus database

2-s2.0-85062366096