Light-harvesting complex II is an antenna of photosystem I in dark-adapted plants.
Journal
Nature plants
ISSN: 2055-0278
Titre abrégé: Nat Plants
Pays: England
ID NLM: 101651677
Informations de publication
Date de publication:
07 2020
07 2020
Historique:
received:
27
07
2019
accepted:
14
05
2020
pubmed:
24
6
2020
medline:
18
3
2021
entrez:
24
6
2020
Statut:
ppublish
Résumé
Photosystem I (PSI) is a major player in the light reactions of photosynthesis. In higher plants, it consists of a core complex and four external antennae, Lhca1-4 forming the PSI-light-harvesting complex I (LHCI) supercomplex. The protein and pigment composition as well as the spectroscopic properties of this complex are considered to be identical in different higher plant species. In addition to the four Lhca, a pool of mobile LHCII increases the antenna size of PSI under most light conditions. In this work, we have first investigated purified PSI complexes and then PSI in vivo upon long-term dark-adaptation of four well-studied plant species: Arabidopsis thaliana, Zea mays, Nicotiana tabacum and Hordeum vulgare. By performing time-resolved fluorescence measurements, we show that LHCII is associated with PSI also in a dark-adapted state in all the plant species investigated. The number of LHCII subunits per PSI is plant-dependent, varying between one and three. Furthermore, we show that the spectroscopic properties of PSI-LHCI supercomplexes differ in different plants.
Identifiants
pubmed: 32572215
doi: 10.1038/s41477-020-0693-4
pii: 10.1038/s41477-020-0693-4
doi:
Substances chimiques
Light-Harvesting Protein Complexes
0
Photosystem I Protein Complex
0
Photosystem II Protein Complex
0
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
860-868Références
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