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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Small eukaryotic phytoplankton communities in tropical waters off Brazil are dominated by symbioses between Haptophyta and nitrogen-fixing cyanobacteria

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Author(s):
Ribeiro, Catherine Gerikas [1, 2] ; Lopes dos Santos, Adriana [2, 3] ; Marie, Dominique [2] ; Brandini, Frederico Pereira [1] ; Vaulot, Daniel [2]
Total Authors: 5
Affiliation:
[1] Univ Sao Paulo, Inst Oceanog, Dept Oceanog Biol, Sao Paulo - Brazil
[2] Sorbonne Univ, CNRS, UMR7144, Stn Biol Roscoff, Roscoff - France
[3] Univ Mayor, GEMA Ctr Genom Ecol & Environm, Camino La Piramide 5750, Santiago - Chile
Total Affiliations: 3
Document type: Journal article
Source: ISME Journal; v. 12, n. 5, p. 1360-1374, MAY 2018.
Web of Science Citations: 4
Abstract

Symbioses between eukaryotic algae and nitrogen-fixing cyanobacteria have been recognized in recent years as a key source of new nitrogen in the oceans. We investigated the composition of the small photosynthetic eukaryote communities associated with nitrogen-fixing cyanobacteria in the Brazilian South Atlantic Bight using a combination of flow cytometry sorting and high throughput sequencing of two genes: the V4 region of 18S rRNA and nifH. Two distinct eukaryotic communities were often encountered, one dominated by the Mamiellophyceae Bathycoccus and Ostreococcus, and one dominated by a prymnesiophyte known to live in symbiosis with the UCYN-A1 nitrogen-fixing cyanobacterium. Among nifH sequences, those from UCYN-A1 were most abundant but three other UCYN-A clades (A2, A3, A4) were also found. Network analysis confirmed the relation between A1 and A2 clades and their hypothesized hosts and pointed out to the potential association between novel Glade A4 with Braarudosphaera bigelowii, previously hypothesized to host A2. (AU)

FAPESP's process: 14/15242-2 - Abundance and diversity of pico- and nanophytoplankton in the South West Atlantic off Brazil
Grantee:Catherine Gérikas Ribeiro
Support Opportunities: Scholarships abroad - Research Internship - Doctorate
FAPESP's process: 12/04800-9 - Diazotrophic community structure along the Brazilian coast and adjacent oceanic area
Grantee:Catherine Gérikas Ribeiro
Support Opportunities: Scholarships in Brazil - Doctorate