Combined dynamics of the 500-600 nm leaf absorption and chlorophyll fluorescence changes in vivo: Evidence for the multifunctional energy quenching role of xanthophylls.

Chlorophyll A / chemistry Fluorescence Xanthophylls / chemistry
Antheraxanthin Dynamic quenching Photoprotection Singlet excited Chla Spectral fitting Xanthophyll cycles Zeaxanthin

Journal

Biochimica et biophysica acta. Bioenergetics
ISSN: 1879-2650
Titre abrégé: Biochim Biophys Acta Bioenerg
Pays: Netherlands
ID NLM: 101731706

Informations de publication

Date de publication:
01 02 2021
Historique:
received: 22 06 2020
revised: 23 10 2020
accepted: 30 11 2020
pubmed: 8 12 2020
medline: 14 4 2021
entrez: 7 12 2020
Statut: ppublish

Résumé

Carotenoids (Cars) regulate the energy flow towards the reaction centres in a versatile way whereby the switch between energy harvesting and dissipation is strongly modulated by the operation of the xanthophyll cycles. However, the cascade of molecular mechanisms during the change from light harvesting to energy dissipation remains spectrally poorly understood. By characterizing the in vivo absorbance changes (ΔA) of leaves from four species in the 500-600 nm range through a Gaussian decomposition, while measuring passively simultaneous Chla fluorescence (F) changes, we present a direct observation of the quick antenna adjustments during a 3-min dark-to-high-light induction. Underlying spectral behaviours of the 500-600 nm ΔA feature can be characterized by a minimum set of three Gaussians distinguishing very quick dynamics during the first minute. Our results show the parallel trend of two Gaussian components and the prompt Chla F quenching. Further, we observe similar quick kinetics between the relative behaviour of these components and the in vivo formations of antheraxanthin (Ant) and zeaxanthin (Zea), in parallel with the dynamic quenching of singlet excited chlorophyll a (

Identifiants

DOI: 10.1016/j.bbabio.2020.148351 PMID: 33285101
pubmed: 33285101
pii: S0005-2728(20)30201-2
doi: 10.1016/j.bbabio.2020.148351
pii:
doi:

Substances chimiques

Xanthophylls 0
Chlorophyll A YF5Q9EJC8Y

Types de publication

Journal Article Research Support, Non-U.S. Gov't

Langues

eng

Sous-ensembles de citation

IM

Pagination

148351

Informations de copyright

Copyright © 2020 The Authors. Published by Elsevier B.V. All rights reserved.

Auteurs

Shari Van Wittenberghe (S)

Laboratory of Earth Observation, Image Processing Laboratory, University of Valencia, C/ Catedrático José Beltrán, 2, 46980 Paterna, Valencia, Spain; Optics of Photosynthesis Laboratory, Institute for Atmospheric and Earth System Research (INAR)/Forest Sciences, Viikki Plant Science Center (VIPS), University of Helsinki, PO Box 27, Latokartanonkaari 7, 00014 Helsinki, Finland. Electronic address: Shari.Wittenberghe@uv.es.

Valero Laparra (V)

Image and Signal Processing Group, Image Processing Laboratory, University of Valencia, C/ Catedrático José Beltrán, 2, 46980 Paterna, Valencia, Spain.

José Ignacio García-Plazaola (JI)

Department of Plant Biology and Ecology, University of the Basque Country (UPV/EHU), 48940 Leioa, Bizkaia, Spain.

Beatriz Fernández-Marín (B)

Department of Botany, Ecology and Plant Physiology, University of La Laguna (ULL), 38200 La Laguna, Tenerife, Spain.

Albert Porcar-Castell (A)

Optics of Photosynthesis Laboratory, Institute for Atmospheric and Earth System Research (INAR)/Forest Sciences, Viikki Plant Science Center (VIPS), University of Helsinki, PO Box 27, Latokartanonkaari 7, 00014 Helsinki, Finland.

José Moreno (J)

Laboratory of Earth Observation, Image Processing Laboratory, University of Valencia, C/ Catedrático José Beltrán, 2, 46980 Paterna, Valencia, Spain.

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Classifications MeSH

questionsmedicales.fr › Composés polycycliques › Composés macrocycliques › Tétrapyrroles › Chlorophylle › Chlorophylle A › Combined dynamics of the 500-600 nm leaf...
questionsmedicales.fr › Phénomènes physiques › Phénomènes optiques › Fluorescence › Combined dynamics of the 500-600 nm leaf...
questionsmedicales.fr › Facteurs biologiques › Pigments biologiques › Caroténoïdes › Xanthophylles › Combined dynamics of the 500-600 nm leaf...