Acclimation of a low iron adapted Ostreococcus strain to iron limitation through cell biomass lowering

Abstract Iron is an essential micronutrient involved in many biological processes and is often limiting for primary production in large regions of the World Ocean. Metagenomic and physiological studies have identified clades or ecotypes of marine phytoplankton that are specialized in iron depleted e...

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Autores principales:	Hugo Botebol, Gaelle Lelandais, Christophe Six, Emmanuel Lesuisse, Arnaud Meng, Lucie Bittner, Stéphane Lecrom, Robert Sutak, Jean-Claude Lozano, Philippe Schatt, Valérie Vergé, Stéphane Blain, François-Yves Bouget
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/c446f38b5de149cbb18e793c482605a8
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spelling	oai:doaj.org-article:c446f38b5de149cbb18e793c482605a82021-12-02T11:52:19ZAcclimation of a low iron adapted Ostreococcus strain to iron limitation through cell biomass lowering10.1038/s41598-017-00216-62045-2322https://doaj.org/article/c446f38b5de149cbb18e793c482605a82017-03-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-00216-6https://doaj.org/toc/2045-2322Abstract Iron is an essential micronutrient involved in many biological processes and is often limiting for primary production in large regions of the World Ocean. Metagenomic and physiological studies have identified clades or ecotypes of marine phytoplankton that are specialized in iron depleted ecological niches. Although less studied, eukaryotic picophytoplankton does contribute significantly to primary production and carbon transfer to higher trophic levels. In particular, metagenomic studies of the green picoalga Ostreococcus have revealed the occurrence of two main clades distributed along coast-offshore gradients, suggesting niche partitioning in different nutrient regimes. Here, we present a study of the response to iron limitation of four Ostreococcus strains isolated from contrasted environments. Whereas the strains isolated in nutrient-rich waters showed high iron requirements, the oceanic strains could cope with lower iron concentrations. The RCC802 strain, in particular, was able to maintain high growth rate at low iron levels. Together physiological and transcriptomic data indicate that the competitiveness of RCC802 under iron limitation is related to a lowering of iron needs though a reduction of the photosynthetic machinery and of protein content, rather than to cell size reduction. Our results overall suggest that iron is one of the factors driving the differentiation of physiologically specialized Ostreococcus strains in the ocean.Hugo BotebolGaelle LelandaisChristophe SixEmmanuel LesuisseArnaud MengLucie BittnerStéphane LecromRobert SutakJean-Claude LozanoPhilippe SchattValérie VergéStéphane BlainFrançois-Yves BougetNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-11 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Hugo Botebol Gaelle Lelandais Christophe Six Emmanuel Lesuisse Arnaud Meng Lucie Bittner Stéphane Lecrom Robert Sutak Jean-Claude Lozano Philippe Schatt Valérie Vergé Stéphane Blain François-Yves Bouget Acclimation of a low iron adapted Ostreococcus strain to iron limitation through cell biomass lowering
description	Abstract Iron is an essential micronutrient involved in many biological processes and is often limiting for primary production in large regions of the World Ocean. Metagenomic and physiological studies have identified clades or ecotypes of marine phytoplankton that are specialized in iron depleted ecological niches. Although less studied, eukaryotic picophytoplankton does contribute significantly to primary production and carbon transfer to higher trophic levels. In particular, metagenomic studies of the green picoalga Ostreococcus have revealed the occurrence of two main clades distributed along coast-offshore gradients, suggesting niche partitioning in different nutrient regimes. Here, we present a study of the response to iron limitation of four Ostreococcus strains isolated from contrasted environments. Whereas the strains isolated in nutrient-rich waters showed high iron requirements, the oceanic strains could cope with lower iron concentrations. The RCC802 strain, in particular, was able to maintain high growth rate at low iron levels. Together physiological and transcriptomic data indicate that the competitiveness of RCC802 under iron limitation is related to a lowering of iron needs though a reduction of the photosynthetic machinery and of protein content, rather than to cell size reduction. Our results overall suggest that iron is one of the factors driving the differentiation of physiologically specialized Ostreococcus strains in the ocean.
format	article
author	Hugo Botebol Gaelle Lelandais Christophe Six Emmanuel Lesuisse Arnaud Meng Lucie Bittner Stéphane Lecrom Robert Sutak Jean-Claude Lozano Philippe Schatt Valérie Vergé Stéphane Blain François-Yves Bouget
author_facet	Hugo Botebol Gaelle Lelandais Christophe Six Emmanuel Lesuisse Arnaud Meng Lucie Bittner Stéphane Lecrom Robert Sutak Jean-Claude Lozano Philippe Schatt Valérie Vergé Stéphane Blain François-Yves Bouget
author_sort	Hugo Botebol
title	Acclimation of a low iron adapted Ostreococcus strain to iron limitation through cell biomass lowering
title_short	Acclimation of a low iron adapted Ostreococcus strain to iron limitation through cell biomass lowering
title_full	Acclimation of a low iron adapted Ostreococcus strain to iron limitation through cell biomass lowering
title_fullStr	Acclimation of a low iron adapted Ostreococcus strain to iron limitation through cell biomass lowering
title_full_unstemmed	Acclimation of a low iron adapted Ostreococcus strain to iron limitation through cell biomass lowering
title_sort	acclimation of a low iron adapted ostreococcus strain to iron limitation through cell biomass lowering
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/c446f38b5de149cbb18e793c482605a8
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Acclimation of a low iron adapted Ostreococcus strain to iron limitation through cell biomass lowering

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