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Meta-Omics Reveals Genetic Flexibility of Diatom Nitrogen Transporters in Response to Environmental Changes

Authors
  • Busseni, Greta1
  • Rocha Jimenez Vieira, Fabio2
  • Amato, Alberto3
  • Pelletier, Eric4, 5
  • Pierella Karlusich, Juan J2
  • Ferrante, Maria I1
  • Wincker, Patrick4, 5
  • Rogato, Alessandra1, 6
  • Bowler, Chris2
  • Sanges, Remo1, 7
  • Maiorano, Luigi1, 8
  • Chiurazzi, Maurizio6
  • Ribera d’Alcalà, Maurizio1
  • Caputi, Luigi1
  • Iudicone, Daniele1
  • 1 Stazione Zoologica Anton Dohrn, Naples, Italy
  • 2 Institut de Biologie de l’Ecole Normale Supérieure (IBENS), Ecole Normale Supérieure, CNRS, INSERM, PSL Université Paris, Paris, France
  • 3 Laboratoire de Physiologie Cellulaire et Végétale, Univ. Grenoble Alpes, CEA, INRA, CNRS. BIG, Grenoble Cedex 9, France
  • 4 Génomique Métabolique, Genoscope, Institut François Jacob, CEA, CNRS, Univ Evry, Université Paris-Saclay, Evry, France
  • 5 FR2022/Tara Oceans-GOSEE, Paris, France
  • 6 Institute of Biosciences and BioResources, CNR, Naples, Italy
  • 7 Scuola Internazionale Superiore di Studi Avanzati (SISSA), Trieste, Italy
  • 8 Dipartimento di Biologia e Biotecnologie “Charles Darwin”, Università di Roma “La Sapienza”, Roma, Italy
Type
Published Article
Journal
Molecular Biology and Evolution
Publisher
Oxford University Press
Publication Date
Jul 01, 2019
Volume
36
Issue
11
Pages
2522–2535
Identifiers
DOI: 10.1093/molbev/msz157
PMID: 31259367
PMCID: PMC6805229
Source
PubMed Central
Keywords
License
Unknown

Abstract

Diatoms (Bacillariophyta), one of the most abundant and diverse groups of marine phytoplankton, respond rapidly to the supply of new nutrients, often out-competing other phytoplankton. Herein, we integrated analyses of the evolution, distribution, and expression modulation of two gene families involved in diatom nitrogen uptake (Di AMT1 and Di NRT2 ), in order to infer the main drivers of divergence in a key functional trait of phytoplankton. Our results suggest that major steps in the evolution of the two gene families reflected key events triggering diatom radiation and diversification. Their expression is modulated in the contemporary ocean by seawater temperature, nitrate, and iron concentrations. Moreover, the differences in diversity and expression of these gene families throughout the water column hint at a possible link with bacterial activity. This study represents a proof-of-concept of how a holistic approach may shed light on the functional biology of organisms in their natural environment.

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