Cyanobacterial symbionts diverged in the late Cretaceous towards lineage-specific nitrogen fixation factories in single-celled phytoplankton.
The unicellular cyanobacterium UCYN-A, one of the major contributors to nitrogen fixation in the open ocean, lives in symbiosis with single-celled phytoplankton. UCYN-A includes several closely related lineages whose partner fidelity, genome-wide expression and time of evolutionary divergence remain...
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ftcdlib:oai:escholarship.org:ark:/13030/qt2q17p2k9 2023-06-18T03:43:01+02:00 Cyanobacterial symbionts diverged in the late Cretaceous towards lineage-specific nitrogen fixation factories in single-celled phytoplankton. Cornejo-Castillo, Francisco M Cabello, Ana M Salazar, Guillem Sánchez-Baracaldo, Patricia Lima-Mendez, Gipsi Hingamp, Pascal Alberti, Adriana Sunagawa, Shinichi Bork, Peer de Vargas, Colomban Raes, Jeroen Bowler, Chris Wincker, Patrick Zehr, Jonathan P Gasol, Josep M Massana, Ramon Acinas, Silvia G 11071 2016-03-01 https://escholarship.org/uc/item/2q17p2k9 unknown eScholarship, University of California qt2q17p2k9 https://escholarship.org/uc/item/2q17p2k9 public Nature communications, vol 7, iss 1 Phytoplankton Cyanobacteria Genomics Seawater Nitrogen Fixation Symbiosis Atlantic Ocean Biological Evolution Haptophyta Human Genome Genetics article 2016 ftcdlib 2023-06-05T18:01:14Z The unicellular cyanobacterium UCYN-A, one of the major contributors to nitrogen fixation in the open ocean, lives in symbiosis with single-celled phytoplankton. UCYN-A includes several closely related lineages whose partner fidelity, genome-wide expression and time of evolutionary divergence remain to be resolved. Here we detect and distinguish UCYN-A1 and UCYN-A2 lineages in symbiosis with two distinct prymnesiophyte partners in the South Atlantic Ocean. Both symbiotic systems are lineage specific and differ in the number of UCYN-A cells involved. Our analyses infer a streamlined genome expression towards nitrogen fixation in both UCYN-A lineages. Comparative genomics reveal a strong purifying selection in UCYN-A1 and UCYN-A2 with a diversification process ∼91 Myr ago, in the late Cretaceous, after the low-nutrient regime period occurred during the Jurassic. These findings suggest that UCYN-A diversified in a co-evolutionary process, wherein their prymnesiophyte partners acted as a barrier driving an allopatric speciation of extant UCYN-A lineages. Article in Journal/Newspaper South Atlantic Ocean University of California: eScholarship |
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University of California: eScholarship |
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Phytoplankton Cyanobacteria Genomics Seawater Nitrogen Fixation Symbiosis Atlantic Ocean Biological Evolution Haptophyta Human Genome Genetics |
spellingShingle |
Phytoplankton Cyanobacteria Genomics Seawater Nitrogen Fixation Symbiosis Atlantic Ocean Biological Evolution Haptophyta Human Genome Genetics Cornejo-Castillo, Francisco M Cabello, Ana M Salazar, Guillem Sánchez-Baracaldo, Patricia Lima-Mendez, Gipsi Hingamp, Pascal Alberti, Adriana Sunagawa, Shinichi Bork, Peer de Vargas, Colomban Raes, Jeroen Bowler, Chris Wincker, Patrick Zehr, Jonathan P Gasol, Josep M Massana, Ramon Acinas, Silvia G Cyanobacterial symbionts diverged in the late Cretaceous towards lineage-specific nitrogen fixation factories in single-celled phytoplankton. |
topic_facet |
Phytoplankton Cyanobacteria Genomics Seawater Nitrogen Fixation Symbiosis Atlantic Ocean Biological Evolution Haptophyta Human Genome Genetics |
description |
The unicellular cyanobacterium UCYN-A, one of the major contributors to nitrogen fixation in the open ocean, lives in symbiosis with single-celled phytoplankton. UCYN-A includes several closely related lineages whose partner fidelity, genome-wide expression and time of evolutionary divergence remain to be resolved. Here we detect and distinguish UCYN-A1 and UCYN-A2 lineages in symbiosis with two distinct prymnesiophyte partners in the South Atlantic Ocean. Both symbiotic systems are lineage specific and differ in the number of UCYN-A cells involved. Our analyses infer a streamlined genome expression towards nitrogen fixation in both UCYN-A lineages. Comparative genomics reveal a strong purifying selection in UCYN-A1 and UCYN-A2 with a diversification process ∼91 Myr ago, in the late Cretaceous, after the low-nutrient regime period occurred during the Jurassic. These findings suggest that UCYN-A diversified in a co-evolutionary process, wherein their prymnesiophyte partners acted as a barrier driving an allopatric speciation of extant UCYN-A lineages. |
format |
Article in Journal/Newspaper |
author |
Cornejo-Castillo, Francisco M Cabello, Ana M Salazar, Guillem Sánchez-Baracaldo, Patricia Lima-Mendez, Gipsi Hingamp, Pascal Alberti, Adriana Sunagawa, Shinichi Bork, Peer de Vargas, Colomban Raes, Jeroen Bowler, Chris Wincker, Patrick Zehr, Jonathan P Gasol, Josep M Massana, Ramon Acinas, Silvia G |
author_facet |
Cornejo-Castillo, Francisco M Cabello, Ana M Salazar, Guillem Sánchez-Baracaldo, Patricia Lima-Mendez, Gipsi Hingamp, Pascal Alberti, Adriana Sunagawa, Shinichi Bork, Peer de Vargas, Colomban Raes, Jeroen Bowler, Chris Wincker, Patrick Zehr, Jonathan P Gasol, Josep M Massana, Ramon Acinas, Silvia G |
author_sort |
Cornejo-Castillo, Francisco M |
title |
Cyanobacterial symbionts diverged in the late Cretaceous towards lineage-specific nitrogen fixation factories in single-celled phytoplankton. |
title_short |
Cyanobacterial symbionts diverged in the late Cretaceous towards lineage-specific nitrogen fixation factories in single-celled phytoplankton. |
title_full |
Cyanobacterial symbionts diverged in the late Cretaceous towards lineage-specific nitrogen fixation factories in single-celled phytoplankton. |
title_fullStr |
Cyanobacterial symbionts diverged in the late Cretaceous towards lineage-specific nitrogen fixation factories in single-celled phytoplankton. |
title_full_unstemmed |
Cyanobacterial symbionts diverged in the late Cretaceous towards lineage-specific nitrogen fixation factories in single-celled phytoplankton. |
title_sort |
cyanobacterial symbionts diverged in the late cretaceous towards lineage-specific nitrogen fixation factories in single-celled phytoplankton. |
publisher |
eScholarship, University of California |
publishDate |
2016 |
url |
https://escholarship.org/uc/item/2q17p2k9 |
op_coverage |
11071 |
genre |
South Atlantic Ocean |
genre_facet |
South Atlantic Ocean |
op_source |
Nature communications, vol 7, iss 1 |
op_relation |
qt2q17p2k9 https://escholarship.org/uc/item/2q17p2k9 |
op_rights |
public |
_version_ |
1769009244692021248 |