Abstract
The thermal dissipation (TD) of absorbed light energy in PSII is considered to be an important photoprotection process in photosynthesis. A major portion of TD has been visualized through the analysis of Chl fluorescence as energy quenching (qE) which depends on the presence of the PsbS subunit. Although the physiological importance of qE-associated TD (qE-TD) has been widely accepted, it is not yet clear how much of the absorbed light energy is dissipated through a qE-associated mechanism. In this study, the fates of absorbed light energy in PSII with regard to different TD processes, including qE-TD, were quantitatively estimated by the typical energy allocation models using transgenic rice in which psbS genes were silenced by RNA interference (RNAi). The silencing of psbS genes resulted in a decrease in the light-inducible portion of TD, whereas the allocation of energy to electron transport did not change over a wide range of light intensities. The allocation models indicate that the energy allocated to qE-TD under saturating light is 30-50%. We also showed that a large portion of absorbed light energy is thermally dissipated in manners that are independent of qE. The nature of such dissipations is discussed.
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Claims 4
Claim · model-written summary
Silencing psbS decreased the light-inducible portion of thermal dissipation in rice.
- Taxon
- Rice
Oryza sativat0 - Treatment
- silencing of psbS genese0
- Gene
- psbSe0
- Outcome
- light-inducible portion of TDe0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice”
e0“The silencing of psbS genes resulted in a decrease in the light-inducible portion of TD, whereas the allocation of energy to electron transport did not change over a wide range of light intensities.”
Claim · model-written summary
Silencing psbS did not change energy allocation to electron transport across a wide light-intensity range.
- Taxon
- RiceOryza sativat0
- Treatment
- silencing of psbS genese0
- Gene
- psbSe0
- Outcome
- allocation of energy to electron transporte0
- Direction
- did not changee0
- Qualifier
- over a wide range of light intensitiese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice”
e0“The silencing of psbS genes resulted in a decrease in the light-inducible portion of TD, whereas the allocation of energy to electron transport did not change over a wide range of light intensities.”
Claim · model-written summary
The model estimated 30-50% of absorbed energy went to qE-TD under saturating light.
- Taxon
- RiceOryza sativat0
- Outcome
- energy allocated to qE-TDe0
- Value
- 30-50%e0
- Qualifier
- under saturating lighte0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice”
e0“The allocation models indicate that the energy allocated to qE-TD under saturating light is 30-50%.”
Claim · model-written summary
A large portion of absorbed light energy was thermally dissipated independently of qE.
- Taxon
- RiceOryza sativat0
- Outcome
- absorbed light energy is thermally dissipatede0
- Qualifier
- independent of qEe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice”
e0“We also showed that a large portion of absorbed light energy is thermally dissipated in manners that are independent of qE.”
The same questions in other papers
loss of function · physiology: photosynthesis · Oryza sativa (rice)Positive and negative results
13 papers in the same direction as this paper · 4 in the opposite direction
- positive
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See all 18 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.