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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10606 - Microbiology

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2019

Kód důvěrnosti údajů

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

Název periodika

The ISME Journal

ISSN

1751-7362

e-ISSN

—

Svazek periodika

13

Číslo periodika v rámci svazku

7

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

12

Strana od-do

1676-1687

Kód UT WoS článku

000472152300004

EID výsledku v databázi Scopus

2-s2.0-85062366096