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Foresi N, De Marco MA, Del Castello F, Ramirez L, Nejamkin A, Calo G, Grimsley N, Correa-Aragunde N, Martínez-Noël GMA. The tiny giant of the sea, Ostreococcus's unique adaptations. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2024; 211:108661. [PMID: 38735153 DOI: 10.1016/j.plaphy.2024.108661] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/2023] [Revised: 04/14/2024] [Accepted: 04/23/2024] [Indexed: 05/14/2024]
Abstract
Ostreococcus spp. are unicellular organisms with one of the simplest cellular organizations. The sequencing of the genomes of different Ostreococcus species has reinforced this status since Ostreococcus tauri has one most compact nuclear genomes among eukaryotic organisms. Despite this, it has retained a number of genes, setting it apart from other organisms with similar small genomes. Ostreococcus spp. feature a substantial number of selenocysteine-containing proteins, which, due to their higher catalytic activity compared to their selenium-lacking counterparts, may require a reduced quantity of proteins. Notably, O. tauri encodes several ammonium transporter genes, that may provide it with a competitive edge for acquiring nitrogen (N). This characteristic makes it an intriguing model for studying the efficient use of N in eukaryotes. Under conditions of low N availability, O. tauri utilizes N from abundant proteins or amino acids, such as L-arginine, similar to higher plants. However, the presence of a nitric oxide synthase (L-arg substrate) sheds light on a new metabolic pathway for L-arg in algae. The metabolic adaptations of O. tauri to day and night cycles offer valuable insights into carbon and iron metabolic configuration. O. tauri has evolved novel strategies to optimize iron uptake, lacking the classic components of the iron absorption mechanism. Overall, the cellular and genetic characteristics of Ostreococcus contribute to its evolutionary success, making it an excellent model for studying the physiological and genetic aspects of how green algae have adapted to the marine environment. Furthermore, given its potential for lipid accumulation and its marine habitat, it may represent a promising avenue for third-generation biofuels.
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Affiliation(s)
- Noelia Foresi
- Instituto de Investigaciones Biológicas-UNMdP-CONICET, Mar del Plata, Argentina.
| | - María Agustina De Marco
- Instituto de Investigaciones en Biodiversidad y Biotecnología (INBIOTEC)-CONICET-FIBA, Mar del Plata, Argentina
| | | | - Leonor Ramirez
- Department of Plant Physiology, Umeå Plant Science Centre, Umeå University, SE-901 87, Umeå, Sweden
| | - Andres Nejamkin
- Instituto de Investigaciones Biológicas-UNMdP-CONICET, Mar del Plata, Argentina
| | - Gonzalo Calo
- Instituto de Investigaciones en Biodiversidad y Biotecnología (INBIOTEC)-CONICET-FIBA, Mar del Plata, Argentina
| | - Nigel Grimsley
- CNRS, LBBM, Sorbonne Université OOB, 1 Avenue de Pierre Fabre, 66650, Banyuls-sur-Mer, France
| | | | - Giselle M A Martínez-Noël
- Instituto de Investigaciones en Biodiversidad y Biotecnología (INBIOTEC)-CONICET-FIBA, Mar del Plata, Argentina.
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2
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Sands E, Davies S, Puxty RJ, Vergé V, Bouget FY, Scanlan DJ, Carré IA. Genetic and physiological responses to light quality in a deep ocean ecotype of Ostreococcus, an ecologically important photosynthetic picoeukaryote. JOURNAL OF EXPERIMENTAL BOTANY 2023; 74:6773-6789. [PMID: 37658791 PMCID: PMC10662239 DOI: 10.1093/jxb/erad347] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2023] [Accepted: 08/31/2023] [Indexed: 09/05/2023]
Abstract
Phytoplankton are exposed to dramatic variations in light quality when cells are carried by upwelling or downwelling currents or encounter sediment. We investigated the potential impact of light quality changes in Ostreococcus, a key marine photosynthetic picoeukaryote, by analysing changes in its transcriptome, pigment content, and photophysiology after acclimation to monochromatic red, green, or blue light. The clade B species RCC809, isolated from the deep euphotic zone of the tropical Atlantic Ocean, responded to blue light by accelerating cell division at the expense of storage reserves and by increasing the relative level of blue-light-absorbing pigments. It responded to red and green light by increasing its potential for photoprotection. In contrast, the clade A species OTTH0595, which originated from a shallow water environment, showed no difference in photosynthetic properties and minor differences in carotenoid contents between light qualities. This was associated with the loss of candidate light-quality responsive promoter motifs identified in RCC809 genes. These results demonstrate that light quality can have a major influence on the physiology of eukaryotic phytoplankton and suggest that different light quality environments can drive selection for diverse patterns of responsiveness and environmental niche partitioning.
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Affiliation(s)
- Elizabeth Sands
- School of Life Sciences, University of Warwick, Coventry, CV4 7AL, UK
| | - Sian Davies
- School of Life Sciences, University of Warwick, Coventry, CV4 7AL, UK
| | | | - Valerie Vergé
- Université Pierre et Marie Curie, Paris 06, UMR 7621, Laboratoire d’Océanographie Microbienne, Observatoire Océanologique, Banyuls sur Mer, France
| | - François-Yves Bouget
- Université Pierre et Marie Curie, Paris 06, UMR 7621, Laboratoire d’Océanographie Microbienne, Observatoire Océanologique, Banyuls sur Mer, France
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3
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Oura M, Papry RI, Kato Y, Nakamura Y, Kosugi C, Hong WK, Mashio AS, Hasegawa H. A new evaluation system of iron bioavailability in seaweed. MARINE ENVIRONMENTAL RESEARCH 2023; 187:105947. [PMID: 36934509 DOI: 10.1016/j.marenvres.2023.105947] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2022] [Revised: 03/01/2023] [Accepted: 03/11/2023] [Indexed: 06/18/2023]
Abstract
In marine ecosystems, the avid binding of iron (Fe) to organic ligands influences Fe bioavailability in seaweed. This study aimed to elucidate Fe's biological availability to seaweed and develop a simple and rapid bioassay method as a new evaluation system. Undaria pinnatifida was used as a model seaweed species and the actual seaweed samples were collected using the 0.5 m × 0.5 m quadrat from the Mashike Bay area of Hokkaido, Japan. Chlorophyll fluorescence measurements were utilized as an index to evaluate the biological -effectiveness of Fe and compared with the results of culture tests based on growth. The effect of Fe content on media, pre-culture, concentrations and types of chelating and reducing agents in clearing solutions, cleaning time, Fe removal effect, and resistance to seaweed were systematically optimized to obtain the maximum efficacy of the washing solution. A bioassay was developed to evaluate the Fe environment by combining chlorophyll fluorescence measurements. The findings suggest that the tolerance of seaweeds to the wash solution is strongly influenced by the concentrations of the chelating and reducing agents than their types. Washing with 0.02 M Ti-Citrate/EDTA solution for 80 s was the most effective in terms of maximum Fe removal with minimum cell damage. The application of pre-culture and chemical pre-treatment methods under Fe deficiency to the culture strain confirmed the maximum reproducibility in the culture test. Finally, the developed method was applied to actual seaweed samples and was found to be applicable to many seaweed species. However, the method was less robust for some seaweed species and depended on the seaweed growth stage.
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Affiliation(s)
- Masahiro Oura
- Graduate School of Natural Science and Technology, Kanazawa University, Kakuma, Kanazawa, 920-1192, Japan
| | - Rimana Islam Papry
- Graduate School of Natural Science and Technology, Kanazawa University, Kakuma, Kanazawa, 920-1192, Japan; Department of Environmental Science, College of Agricultural Sciences, IUBAT- International University of Business Agriculture and Technology, Sector 10, Uttara, Dhaka, 1230, Bangladesh.
| | - Yusuke Kato
- Graduate School of Natural Science and Technology, Kanazawa University, Kakuma, Kanazawa, 920-1192, Japan
| | - Yuki Nakamura
- Graduate School of Natural Science and Technology, Kanazawa University, Kakuma, Kanazawa, 920-1192, Japan
| | - Chika Kosugi
- Advanced Technology Research Laboratories, Nippon Steel Corporation, 20-1 Shintomi, Futtsu City, Chiba, 293-8511, Japan
| | - Wong Kuo Hong
- Institute of Science and Engineering, Kanazawa University, Kakuma, Kanazawa, 920-1192, Japan
| | - Asami Suzuki Mashio
- Institute of Science and Engineering, Kanazawa University, Kakuma, Kanazawa, 920-1192, Japan
| | - Hiroshi Hasegawa
- Institute of Science and Engineering, Kanazawa University, Kakuma, Kanazawa, 920-1192, Japan.
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4
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Reich HG, Tu WC, Rodriguez IB, Chou Y, Keister EF, Kemp DW, LaJeunesse TC, Ho TY. Iron Availability Modulates the Response of Endosymbiotic Dinoflagellates to Heat Stress. JOURNAL OF PHYCOLOGY 2021; 57:3-13. [PMID: 32996595 DOI: 10.1111/jpy.13078] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Revised: 09/03/2020] [Accepted: 09/11/2020] [Indexed: 06/11/2023]
Abstract
Warming and nutrient limitation are stressors known to weaken the health of microalgae. In situations of stress, access to energy reserves can minimize physiological damage. Because of its widespread requirements in biochemical processes, iron is an important trace metal, especially for photosynthetic organisms. Lowered iron availability in oceans experiencing rising temperatures may contribute to the thermal sensitivity of reef-building corals, which rely on mutualisms with dinoflagellates to survive. To test the influence of iron concentration on thermal sensitivity, the physiological responses of cultured symbiotic dinoflagellates (genus Breviolum; family Symbiodiniaceae) were evaluated when exposed to increasing temperatures (26 to 30°C) and iron concentrations ranging from replete (500 pM Fe') to limiting (50 pM Fe') under a diurnal light cycle with saturating radiance. Declines in photosynthetic efficiency at elevated temperatures indicated sensitivity to heat stress. Furthermore, five times the amount of iron was needed to reach exponential growth during heat stress (50 pM Fe' at 26-28°C vs. 250 pM Fe' at 30°C). In treatments where exponential growth was reached, Breviolum psygmophilum grew faster than B.minutum, possibly due to greater cellular contents of iron and other trace metals. The metal composition of B.psygmophilum shifted only at the highest temperature (30°C), whereas changes in B.minutum were observed at lower temperatures (28°C). The influence of iron availability in modulating each alga's response to thermal stress suggests the importance of trace metals to the health of coral-algal mutualisms. Ultimately, a greater ability to acquire scarce metals may improve the tolerance of corals to physiological stressors and contribute to the differences in performance associated with hosting one symbiont species over another.
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Affiliation(s)
- Hannah G Reich
- Department of Biology, The Pennsylvania State University, University Park, Pennsylvania, 16802, USA
| | - Wan-Chen Tu
- Research Center for Environmental Changes, Academia Sinica, Taipei, Taiwan
| | - Irene B Rodriguez
- Research Center for Environmental Changes, Academia Sinica, Taipei, Taiwan
| | - Yalan Chou
- Research Center for Environmental Changes, Academia Sinica, Taipei, Taiwan
| | - Elise F Keister
- Department of Biology, The University of Alabama at Birmingham, Birmingham, Alabama, 35294, USA
| | - Dustin W Kemp
- Department of Biology, The University of Alabama at Birmingham, Birmingham, Alabama, 35294, USA
| | - Todd C LaJeunesse
- Department of Biology, The Pennsylvania State University, University Park, Pennsylvania, 16802, USA
| | - Tung-Yuan Ho
- Research Center for Environmental Changes, Academia Sinica, Taipei, Taiwan
- Institute of Oceanography, National Taiwan University, Taipei, Taiwan
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5
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Paerl RW, Venezia RE, Sanchez JJ, Paerl HW. Picophytoplankton dynamics in a large temperate estuary and impacts of extreme storm events. Sci Rep 2020; 10:22026. [PMID: 33328574 PMCID: PMC7744581 DOI: 10.1038/s41598-020-79157-6] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2020] [Accepted: 12/01/2020] [Indexed: 01/10/2023] Open
Abstract
Picophytoplankton (PicoP) are increasingly recognized as significant contributors to primary productivity and phytoplankton biomass in coastal and estuarine systems. Remarkably though, PicoP composition is unknown or not well-resolved in several large estuaries including the semi-lagoonal Neuse River Estuary (NRE), a tributary of the second largest estuary-system in the lower USA, the Pamlico-Albemarle Sound. The NRE is impacted by extreme weather events, including recent increases in precipitation and flooding associated with tropical cyclones. Here we examined the impacts of moderate to extreme (Hurricane Florence, September 2018) precipitation events on NRE PicoP abundances and composition using flow cytometry, over a 1.5 year period. Phycocyanin-rich Synechococcus-like cells were the most dominant PicoP, reaching ~ 106 cells mL-1, which highlights their importance as key primary producers in this relatively long residence-time estuary. Ephemeral "blooms" of picoeukaryotic phytoplankton (PEUK) during spring and after spikes in river flow were also detected, making PEUK periodically major contributors to PicoP biomass (up to ~ 80%). About half of the variation in PicoP abundance was explained by measured environmental variables. Temperature explained the most variation (24.5%). Change in total dissolved nitrogen concentration, an indication of increased river discharge, explained the second-most variation in PicoP abundance (15.9%). The short-term impacts of extreme river discharge from Hurricane Florence were particularly evident as PicoP biomass was reduced by ~ 100-fold for more than 2 weeks. We conclude that precipitation is a highly influential factor on estuarine PicoP biomass and composition, and show how 'wetter' future climate conditions will have ecosystem impacts down to the smallest of phytoplankton.
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Affiliation(s)
- Ryan W Paerl
- Department of Marine Earth and Atmospheric Sciences, North Carolina State University, Raleigh, NC, 27695-8208, USA.
| | - Rebecca E Venezia
- Department of Marine Earth and Atmospheric Sciences, North Carolina State University, Raleigh, NC, 27695-8208, USA
| | - Joel J Sanchez
- Department of Marine Earth and Atmospheric Sciences, North Carolina State University, Raleigh, NC, 27695-8208, USA
| | - Hans W Paerl
- Institute of Marine Sciences, University of North Carolina At Chapel Hill, Morehead City, NC, 28557, USA
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6
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Sutak R, Camadro JM, Lesuisse E. Iron Uptake Mechanisms in Marine Phytoplankton. Front Microbiol 2020; 11:566691. [PMID: 33250865 PMCID: PMC7676907 DOI: 10.3389/fmicb.2020.566691] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Accepted: 10/19/2020] [Indexed: 12/20/2022] Open
Abstract
Oceanic phytoplankton species have highly efficient mechanisms of iron acquisition, as they can take up iron from environments in which it is present at subnanomolar concentrations. In eukaryotes, three main models were proposed for iron transport into the cells by first studying the kinetics of iron uptake in different algal species and then, more recently, by using modern biological techniques on the model diatom Phaeodactylum tricornutum. In the first model, the rate of uptake is dependent on the concentration of unchelated Fe species, and is thus limited thermodynamically. Iron is transported by endocytosis after carbonate-dependent binding of Fe(III)' (inorganic soluble ferric species) to phytotransferrin at the cell surface. In this strategy the cells are able to take up iron from very low iron concentration. In an alternative model, kinetically limited for iron acquisition, the extracellular reduction of all iron species (including Fe') is a prerequisite for iron acquisition. This strategy allows the cells to take up iron from a great variety of ferric species. In a third model, hydroxamate siderophores can be transported by endocytosis (dependent on ISIP1) after binding to the FBP1 protein, and iron is released from the siderophores by FRE2-dependent reduction. In prokaryotes, one mechanism of iron uptake is based on the use of siderophores excreted by the cells. Iron-loaded siderophores are transported across the cell outer membrane via a TonB-dependent transporter (TBDT), and are then transported into the cells by an ABC transporter. Open ocean cyanobacteria do not excrete siderophores but can probably use siderophores produced by other organisms. In an alternative model, inorganic ferric species are transported through the outer membrane by TBDT or by porins, and are taken up by the ABC transporter system FutABC. Alternatively, ferric iron of the periplasmic space can be reduced by the alternative respiratory terminal oxidase (ARTO) and the ferrous ions can be transported by divalent metal transporters (FeoB or ZIP). After reoxidation, iron can be taken up by the high-affinity permease Ftr1.
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Affiliation(s)
- Robert Sutak
- Department of Parasitology, Faculty of Science, Charles University, BIOCEV, Vestec, Czechia
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7
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Shah H, Xin Q, Jia X, Gong JR. Single precursor-based luminescent nitrogen-doped carbon dots and their application for iron (III) sensing. ARAB J CHEM 2019. [DOI: 10.1016/j.arabjc.2019.06.004] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
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8
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Sanchez F, Geffroy S, Norest M, Yau S, Moreau H, Grimsley N. Simplified Transformation of Ostreococcus tauri Using Polyethylene Glycol. Genes (Basel) 2019; 10:E399. [PMID: 31130696 PMCID: PMC6562926 DOI: 10.3390/genes10050399] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2019] [Revised: 05/16/2019] [Accepted: 05/21/2019] [Indexed: 12/21/2022] Open
Abstract
Ostreococcustauri is an easily cultured representative of unicellular algae (class Mamiellophyceae) that abound in oceans worldwide. Eight complete 13-22 Mb genomes of phylogenetically divergent species within this class are available, and their DNA sequences are nearly always present in metagenomic data produced from marine samples. Here we describe a simplified and robust transformation protocol for the smallest of these algae (O. tauri). Polyethylene glycol (PEG) treatment was much more efficient than the previously described electroporation protocol. Short (2 min or less) incubation times in PEG gave >104 transformants per microgram DNA. The time of cell recovery after transformation could be reduced to a few hours, permitting the experiment to be done in a day rather than overnight as used in previous protocols. DNA was randomly inserted in the O. tauri genome. In our hands PEG was 20-40-fold more efficient than electroporation for the transformation of O. tauri, and this improvement will facilitate mutagenesis of all of the dispensable genes present in the tiny O. tauri genome.
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Affiliation(s)
- Frédéric Sanchez
- CNRS UMR7232 BIOM (Biologie Intégrative des Organismes Marin) Sorbonne University, 66650 Banyuls sur Mer, France.
| | - Solène Geffroy
- IFREMER, Centre Atlantique, 44331 Nantes CEDEX 03, France.
| | - Manon Norest
- CNRS UMR7232 BIOM (Biologie Intégrative des Organismes Marin) Sorbonne University, 66650 Banyuls sur Mer, France.
| | - Sheree Yau
- CNRS UMR7232 BIOM (Biologie Intégrative des Organismes Marin) Sorbonne University, 66650 Banyuls sur Mer, France.
| | - Hervé Moreau
- CNRS UMR7232 BIOM (Biologie Intégrative des Organismes Marin) Sorbonne University, 66650 Banyuls sur Mer, France.
| | - Nigel Grimsley
- CNRS UMR7232 BIOM (Biologie Intégrative des Organismes Marin) Sorbonne University, 66650 Banyuls sur Mer, France.
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9
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Scheiber IF, Pilátová J, Malych R, Kotabova E, Krijt M, Vyoral D, Mach J, Léger T, Camadro JM, Prášil O, Lesuisse E, Sutak R. Copper and iron metabolism in Ostreococcus tauri – the role of phytotransferrin, plastocyanin and a chloroplast copper-transporting ATPase. Metallomics 2019; 11:1657-1666. [DOI: 10.1039/c9mt00078j] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
We have identified Ostreococcus tauri major iron uptake mediating protein, phytotransferrin (Ot-FEA1), whose expression and binding of iron is copper dependent.
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10
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Demory D, Baudoux AC, Monier A, Simon N, Six C, Ge P, Rigaut-Jalabert F, Marie D, Sciandra A, Bernard O, Rabouille S. Picoeukaryotes of the Micromonas genus: sentinels of a warming ocean. ISME JOURNAL 2018; 13:132-146. [PMID: 30116039 DOI: 10.1038/s41396-018-0248-0] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2017] [Revised: 05/15/2018] [Accepted: 06/11/2018] [Indexed: 11/09/2022]
Abstract
Photosynthetic picoeukaryotesx in the genus Micromonas show among the widest latitudinal distributions on Earth, experiencing large thermal gradients from poles to tropics. Micromonas comprises at least four different species often found in sympatry. While such ubiquity might suggest a wide thermal niche, the temperature response of the different strains is still unexplored, leaving many questions as for their ecological success over such diverse ecosystems. Using combined experiments and theory, we characterize the thermal response of eleven Micromonas strains belonging to four species. We demonstrate that the variety of specific responses to temperature in the Micromonas genus makes this environmental factor an ideal marker to describe its global distribution and diversity. We then propose a diversity model for the genus Micromonas, which proves to be representative of the whole phytoplankton diversity. This prominent primary producer is therefore a sentinel organism of phytoplankton diversity at the global scale. We use the diversity within Micromonas to anticipate the potential impact of global warming on oceanic phytoplankton. We develop a dynamic, adaptive model and run forecast simulations, exploring a range of adaptation time scales, to probe the likely responses to climate change. Results stress how biodiversity erosion depends on the ability of organisms to adapt rapidly to temperature increase.
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Affiliation(s)
- David Demory
- School of Biology, Georgia Institute of Technology, Atlanta, GA, USA. .,Sorbonne University, UPMC Univ Paris 06, INSU-CNRS, UMR 7093, Laboratoire Océanographique de Villefranche, 181 Chemin du Lazaret, 06230, Villefranche-sur-mer, France. .,University of Côte d'Azur, INRIA, BIOCORE team, BP93, 06902, Sophia-Antipolis Cedex, France.
| | - Anne-Claire Baudoux
- Sorbonne University, UPMC Univ Paris 06, CNRS, UMR 7144, Station Biologique de Roscoff, 29680, Roscoff, France
| | - Adam Monier
- Biosciences, University of Exeter, Exeter, UK
| | - Nathalie Simon
- Sorbonne University, UPMC Univ Paris 06, CNRS, UMR 7144, Station Biologique de Roscoff, 29680, Roscoff, France
| | - Christophe Six
- Sorbonne University, UPMC Univ Paris 06, CNRS, UMR 7144, Station Biologique de Roscoff, 29680, Roscoff, France
| | - Pei Ge
- Sorbonne University, UPMC Univ Paris 06, CNRS, UMR 7144, Station Biologique de Roscoff, 29680, Roscoff, France
| | - Fabienne Rigaut-Jalabert
- Sorbonne University, UPMC Univ Paris 06, CNRS, Fédération de Recherche FR2424, Station Biologique de Roscoff, 29680, Roscoff, France
| | - Dominique Marie
- Sorbonne University, UPMC Univ Paris 06, CNRS, UMR 7144, Station Biologique de Roscoff, 29680, Roscoff, France
| | - Antoine Sciandra
- Sorbonne University, UPMC Univ Paris 06, INSU-CNRS, UMR 7093, Laboratoire Océanographique de Villefranche, 181 Chemin du Lazaret, 06230, Villefranche-sur-mer, France
| | - Olivier Bernard
- University of Côte d'Azur, INRIA, BIOCORE team, BP93, 06902, Sophia-Antipolis Cedex, France.
| | - Sophie Rabouille
- Sorbonne University, UPMC Univ Paris 06, INSU-CNRS, UMR 7093, Laboratoire Océanographique de Villefranche, 181 Chemin du Lazaret, 06230, Villefranche-sur-mer, France.
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11
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Guyon JB, Vergé V, Schatt P, Lozano JC, Liennard M, Bouget FY. Comparative Analysis of Culture Conditions for the Optimization of Carotenoid Production in Several Strains of the Picoeukaryote Ostreococcus. Mar Drugs 2018; 16:md16030076. [PMID: 29495580 PMCID: PMC5867620 DOI: 10.3390/md16030076] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2018] [Revised: 02/16/2018] [Accepted: 02/16/2018] [Indexed: 01/09/2023] Open
Abstract
Microalgae are promising sources for the sustainable production of compounds of interest for biotechnologies. Compared to higher plants, microalgae have a faster growth rate and can be grown in industrial photobioreactors. The microalgae biomass contains specific metabolites of high added value for biotechnology such as lipids, polysaccharides or carotenoid pigments. Studying carotenogenesis is important for deciphering the mechanisms of adaptation to stress tolerance as well as for biotechnological production. In recent years, the picoeukaryote Ostreococcustauri has emerged as a model organism thanks to the development of powerful genetic tools. Several strains of Ostreococcus isolated from different environments have been characterized with respect to light response or iron requirement. We have compared the carotenoid contents and growth rates of strains of Ostreococcus (OTTH595, RCC802 and RCC809) under a wide range of light, salinity and temperature conditions. Carotenoid profiles and productivities varied in a strain-specific and stress-dependent manner. Our results also illustrate that phylogenetically related microalgal strains originating from different ecological niches present specific interests for the production of specific molecules under controlled culture conditions.
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Affiliation(s)
- Jean-Baptiste Guyon
- Observatoire Océanologique, UMR 7621 Laboratoire d'Océanographie Microbienne, Université de Pierre et Marie Curie (Paris 06), Sorbonne Universités, 66650 Banyuls-sur-Mer, France.
| | - Valérie Vergé
- Observatoire Océanologique, UMR 7621 Laboratoire d'Océanographie Microbienne, Université de Pierre et Marie Curie (Paris 06), Sorbonne Universités, 66650 Banyuls-sur-Mer, France.
| | - Philippe Schatt
- Observatoire Océanologique, UMR 7621 Laboratoire d'Océanographie Microbienne, Université de Pierre et Marie Curie (Paris 06), Sorbonne Universités, 66650 Banyuls-sur-Mer, France.
| | - Jean-Claude Lozano
- Observatoire Océanologique, UMR 7621 Laboratoire d'Océanographie Microbienne, Université de Pierre et Marie Curie (Paris 06), Sorbonne Universités, 66650 Banyuls-sur-Mer, France.
| | - Marion Liennard
- Observatoire Océanologique, UMR 7621 Laboratoire d'Océanographie Microbienne, Université de Pierre et Marie Curie (Paris 06), Sorbonne Universités, 66650 Banyuls-sur-Mer, France.
| | - François-Yves Bouget
- Observatoire Océanologique, UMR 7621 Laboratoire d'Océanographie Microbienne, Université de Pierre et Marie Curie (Paris 06), Sorbonne Universités, 66650 Banyuls-sur-Mer, France.
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