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xFATE SIGNED

The Fate of Excitation Energy in Photoinhibited Chloroplasts

Total Cost €

0

EC-Contrib. €

0

Partnership

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 xFATE project word cloud

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

absorbed    protection    followed    core    interestingly    too    nevertheless    centers    reaction    excessive    promises    decrease    sugars    center    dissipated    hypothesis    co2    heterogeneity    potentially    psii    inevitably    reduce    replacement    photosystem    plan    isolated    crop    spectroscopy    damaged    degraded    absence    cultivation    fluorescence    conversion    holds    fundamental    unknown    thermal    molecule    single    emission    dissipates    reveal    resolved    excitation    plants    natural    thermally    mechanisms    functions    scenarios    occurs    degradation    combined    transient    yield    damage    photoprotective    energy    light    explores    carbon    absorption    excitons    environments    subsequently    happens    thermodynamics    mechanism    dissipation    biochemical    altered    algae    unraveling    accompanied    kinetics    first    molecular    situations    inhibited    indicating    photochemical    temporarily    spectrally    photoinhibition    scenario    probed    fate    leads    quenching   

Project "xFATE" data sheet

The following table provides information about the project.

Coordinator
STICHTING VU 

Organization address
address: DE BOELELAAN 1105
city: AMSTERDAM
postcode: 1081 HV
website: www.vu.nl

contact info
title: n.a.
name: n.a.
surname: n.a.
function: n.a.
email: n.a.
telephone: n.a.
fax: n.a.

 Coordinator Country Netherlands [NL]
 Total cost 165˙598 €
 EC max contribution 165˙598 € (100%)
 Programme 1. H2020-EU.1.3.2. (Nurturing excellence by means of cross-border and cross-sector mobility)
 Code Call H2020-MSCA-IF-2017
 Funding Scheme MSCA-IF-EF-ST
 Starting year 2018
 Duration (year-month-day) from 2018-03-01   to  2020-02-29

 Partnership

Take a look of project's partnership.

# participants  country  role  EC contrib. [€] 
1    STICHTING VU NL (AMSTERDAM) coordinator 165˙598.00

Map

 Project objective

Plants use light energy to reduce carbon from CO2 to produce sugars. But what happens if too much light is absorbed? Part of the energy is thermally dissipated in a process called non-photochemical quenching; nevertheless excessive absorption inevitably leads to Photosystem II (PSII) damage and photoinhibition. This is followed by degradation and replacement of the reaction center core. Interestingly, photoinhibition is accompanied by a decrease in fluorescence yield, indicating an increase of thermal energy dissipation, leading to the proposal that it functions as a photoprotective mechanism. The molecular mechanism behind this energy dissipation is, however, unknown and the aim of this project is to determine the fate of excitons during photoinhibition. We plan to investigate two scenarios of photoinhibition: one in which the PSII centers are damaged and not degraded, and a second in which the PSII centers are damaged and subsequently degraded. We will use a hypothesis-driven approach for the first scenario and investigate whether the altered thermodynamics of the inhibited PSII can explain changes in fluorescence emission yield and kinetics. The second scenario explores the mechanism that dissipates excitation energy in the absence of the PSII core. Both situations will be probed using spectrally- and temporarily-resolved fluorescence and transient absorption spectroscopy combined with biochemical analyses. Finally, we will use single-molecule spectroscopy on isolated PSII to reveal heterogeneity of PSII damage during photoinhibition. Potentially unraveling new mechanisms of protection against excessive energy absorption, crucial in natural environments where photoinhibition occurs regularly, holds promises not only for our fundamental understanding of energy conversion, but also for future applications in algae and crop cultivation.

 Publications

year authors and title journal last update
List of publications.
2019 Lijin Tian, Wojciech J. Nawrocki, Xin Liu, Iryna Polukhina, Ivo H. M. van Stokkum, Roberta Croce
pH dependence, kinetics and light-harvesting regulation of nonphotochemical quenching in Chlamydomonas
published pages: 8320-8325, ISSN: 0027-8424, DOI: 10.1073/pnas.1817796116
Proceedings of the National Academy of Sciences 116/17 2020-04-01
2020 Wojciech J. Nawrocki, Xin Liu, Roberta Croce
Chlamydomonas reinhardtii Exhibits De Facto Constitutive NPQ Capacity in Physiologically Relevant Conditions
published pages: 472-479, ISSN: 0032-0889, DOI: 10.1104/pp.19.00658
Plant Physiology 182/1 2020-04-01
2019 Lauren Nicol, Wojciech J. Nawrocki, Roberta Croce
Disentangling the sites of non-photochemical quenching in vascular plants
published pages: 1177-1183, ISSN: 2055-0278, DOI: 10.1038/s41477-019-0526-5
Nature Plants 5/11 2020-04-01

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