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UCYN2PLAST SIGNED

Exploring the mechanisms underlying the evolution of plastids through the study of an unusual nitrogen-fixing symbiosis

Total Cost €

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EC-Contrib. €

0

Partnership

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 UCYN2PLAST project word cloud

Explore the words cloud of the UCYN2PLAST project. It provides you a very rough idea of what is the project "UCYN2PLAST" about.

fixed    prymnesiophyte    rely    incubation    point    earth    first    nature    unusual    cycles    algal    quantitative    organic    ocean    samples    functional    coupling    mechanisms    give    purpose    sources    lineages    host    combined    identification    lacks    marine    capacity    explaining    specialization    symbioses    evolution    single    symbiotic    global    relationships    co2    experiments    algae    regulating    discovered    oxygenic    isotopic    elucidating    perform    performed    fixation    genome    seawater    microscopy    nutrient    valuable    underlying    eukaryotic    eukaryotes    dramatic    organisms    evident    plastid    critical    probes    unicellular    techniques    diel    understand    analogous    ucyn    acid    deep    characterization    exchange    fixing    electron    productivity    celled    cyanobacterial    previously    closely    turn    plastids    nitrogen    symbiosis    innovation    molecular    tricarboxylic    evolutionary    view    underpinnings    carbon    gain    photosynthesis    unknown    nanosims    largely    metatranscriptomic    hypothesized    symbiont    cyanobacterium    cycle    supply    origin    associations    alga    difficult    shows    fish    chloroplasts   

Project "UCYN2PLAST" data sheet

The following table provides information about the project.

Coordinator
UNIVERSITE PIERRE ET MARIE CURIE - PARIS 6 

There are not information about this coordinator. Please contact Fabio for more information, thanks.

 Coordinator Country France [FR]
 Total cost 246˙668 €
 EC max contribution 246˙668 € (100%)
 Programme 1. H2020-EU.1.3.2. (Nurturing excellence by means of cross-border and cross-sector mobility)
 Code Call H2020-MSCA-IF-2016
 Funding Scheme MSCA-IF-GF
 Starting year 2018
 Duration (year-month-day) from 2018-01-01   to  2021-11-01

 Partnership

Take a look of project's partnership.

# participants  country  role  EC contrib. [€] 
1    SORBONNE UNIVERSITE FR (PARIS) coordinator 246˙668.00
2    UNIVERSITE PIERRE ET MARIE CURIE - PARIS 6 FR (PARIS) coordinator 0.00
3    THE REGENTS OF THE UNIVERSITY OF CALIFORNIA US (OAKLAND CA) partner 0.00

Map

 Project objective

Symbioses are evident sources of innovation in nature, critical for the evolution of plastids and the success of eukaryotes on Earth. The mechanisms promoting such relationships, however, are difficult to identify, especially between single-celled organisms, and remain largely unknown. A widespread symbiosis was recently discovered in the ocean between an unicellular cyanobacterium (UCYN-A) and single-celled eukaryotic algae (prymnesiophyte). UCYN-A lacks typical cyanobacterial features such as the capacity to perform oxygenic photosynthesis, CO2 fixation or the tricarboxylic acid cycle, and must thus rely on the supply of organic matter from the algal host. In turn, UCYN-A shows a dramatic genome reduction with a high specialization in nitrogen fixation, providing fixed nitrogen to the alga. Given the importance of nitrogen for the algal productivity, it has been hypothesized that UCYN-A could eventually give rise to a nitrogen-fixing plastid in a process analogous to the origin of chloroplasts. This project aims to study the UCYN-A symbiosis both from an evolutionary and a functional point of view: First, the identification and characterization of new associations from marine samples at a global scale through molecular techniques will allow a deep comparison of closely-related symbiotic lineages that will help to understand the evolutionary underpinnings of this symbiosis. Second, nutrient incubation experiments of seawater samples over diel cycles will be performed to identify potential factors regulating the carbon and nitrogen exchange between partners to gain knowledge on the host-symbiont coupling mechanisms. For this purpose, metatranscriptomic analysis and electron microscopy combined with molecular probes and quantitative isotopic techniques (FISH-nanoSIMS) will be applied. Elucidating the mechanisms underlying this unusual nitrogen fixing symbiosis will provide valuable insight into previously unknown processes explaining the evolution of plastids

 Publications

year authors and title journal last update
List of publications.
2019 Francisco M. Cornejo-Castillo, Maria del Carmen Muñoz-Marín, Kendra A. Turk-Kubo, Marta Royo-Llonch, Hanna Farnelid, Silvia G. Acinas, Jonathan P. Zehr
UCYN-A3, a newly characterized open ocean sublineage of the symbiotic N 2 -fixing cyanobacterium Candidatus Atelocyanobacterium thalassa
published pages: 111-124, ISSN: 1462-2912, DOI: 10.1111/1462-2920.14429
Environmental Microbiology 21/1 2020-03-05
2019 Francisco M. Cornejo-Castillo, Jonathan P. Zehr
Hopanoid lipids may facilitate aerobic nitrogen fixation in the ocean
published pages: 18269-18271, ISSN: 0027-8424, DOI: 10.1073/pnas.1908165116
Proceedings of the National Academy of Sciences 116/37 2020-03-05

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The information about "UCYN2PLAST" are provided by the European Opendata Portal: CORDIS opendata.

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