Abstract
LHCII, the most abundant membrane protein on earth, is the major light-harvesting complex of plants. It is generally accepted that LHCII is associated with Photosystem II and only as a short-term response to overexcitation of PSII a subset moves to Photosystem I, triggered by its phosphorylation (state1 to state2 transition). However, here we show that in most natural light conditions LHCII serves as an antenna of both Photosystem I and Photosystem II and it is quantitatively demonstrated that this is required to achieve excitation balance between the two photosystems. This allows for acclimation to different light intensities simply by regulating the expression of LHCII genes only. It is demonstrated that indeed the amount of LHCII that is bound to both photosystems decreases when growth light intensity increases and vice versa. Finally, time-resolved fluorescence measurements on the photosynthetic thylakoid membranes show that LHCII is even a more efficient light harvester when associated with Photosystem I than with Photosystem II.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by-nc-nd. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 5
Claim · model-written summary
In most natural light conditions LHCII serves as an antenna of both Photosystem I and Photosystem II.
- Taxon
- plantsViridiplantaee0
- Gene
- LHCIIe1
- Outcome
- serves as an antenna of both Photosystem I and Photosystem IIe1
- Qualifier
- in most natural light conditionse1
Verbatim
e1“However, here we show that in most natural light conditions LHCII serves as an antenna of both Photosystem I and Photosystem II and it is quantitatively demonstrated that this is required to achieve excitation balance between the two photosystems”
e0“LHCII, the most abundant membrane protein on earth, is the major light-harvesting complex of plants”
Claim · model-written summary
LHCII acting as antenna of both photosystems is required to achieve excitation balance between Photosystem I and Photosystem II.
- Taxon
- plantsViridiplantaee0
- Gene
- LHCIIe1
- Outcome
- excitation balance between the two photosystemse1
- Qualifier
- quantitatively demonstratede1
Verbatim
e1“However, here we show that in most natural light conditions LHCII serves as an antenna of both Photosystem I and Photosystem II and it is quantitatively demonstrated that this is required to achieve excitation balance between the two photosystems”
e0“LHCII, the most abundant membrane protein on earth, is the major light-harvesting complex of plants”
Claim · model-written summary
The amount of LHCII bound to both photosystems decreases as growth light intensity increases, and vice versa.
Verbatim
e3“It is demonstrated that indeed the amount of LHCII that is bound to both photosystems decreases when growth light intensity increases and vice versa”
e0“LHCII, the most abundant membrane protein on earth, is the major light-harvesting complex of plants”
Claim · model-written summary
Regulating the expression of LHCII genes allows acclimation to different light intensities.
- Taxon
- plantsViridiplantaee0
- Gene
- LHCII genese2
- Outcome
- acclimation to different light intensitiese2
- Qualifier
- simply by regulating the expressione2
Verbatim
e2“This allows for acclimation to different light intensities simply by regulating the expression of LHCII genes only”
e0“LHCII, the most abundant membrane protein on earth, is the major light-harvesting complex of plants”
Claim · model-written summary
LHCII is a more efficient light harvester when associated with Photosystem I than with Photosystem II.
Verbatim
e4“Finally, time-resolved fluorescence measurements on the photosynthetic thylakoid membranes show that LHCII is even a more efficient light harvester when associated with Photosystem I than with Photosystem II”
e0“LHCII, the most abundant membrane protein on earth, is the major light-harvesting complex of plants”