PMID- 21873330
OWN - NLM
STAT- MEDLINE
DCOM- 20120206
LR  - 20151119
IS  - 1471-9053 (Electronic)
IS  - 0032-0781 (Linking)
VI  - 52
IP  - 10
DP  - 2011 Oct
TI  - Allocation of absorbed light energy in PSII to thermal dissipations in the 
      presence or absence of PsbS subunits of rice.
PG  - 1822-31
LID - 10.1093/pcp/pcr119 [doi]
AB  - 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.
FAU - Ishida, Satoshi
AU  - Ishida S
AD  - Division of Integrated Life Sciences, Graduate School of Biostudies, Kyoto 
      University, Kyoto 606-8502, Japan.
FAU - Morita, Ken-ichi
AU  - Morita K
FAU - Kishine, Masahiro
AU  - Kishine M
FAU - Takabayashi, Atsushi
AU  - Takabayashi A
FAU - Murakami, Reiko
AU  - Murakami R
FAU - Takeda, Satomi
AU  - Takeda S
FAU - Shimamoto, Ko
AU  - Shimamoto K
FAU - Sato, Fumihiko
AU  - Sato F
FAU - Endo, Tsuyoshi
AU  - Endo T
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20110826
PL  - Japan
TA  - Plant Cell Physiol
JT  - Plant & cell physiology
JID - 9430925
RN  - 0 (Photosystem II Protein Complex)
RN  - 0 (Protein Subunits)
SB  - IM
MH  - Absorption/radiation effects
MH  - Base Sequence
MH  - Electron Transport/radiation effects
MH  - Gene Expression Regulation, Plant
MH  - Genes, Plant/genetics
MH  - *Light
MH  - Models, Biological
MH  - Molecular Sequence Data
MH  - Oryza/genetics/*metabolism/*radiation effects
MH  - Photosynthesis/radiation effects
MH  - Photosystem II Protein Complex/*metabolism
MH  - Plants, Genetically Modified
MH  - Protein Subunits/genetics/*metabolism
MH  - RNA Interference
MH  - *Temperature
EDAT- 2011/08/30 06:00
MHDA- 2012/02/07 06:00
CRDT- 2011/08/30 06:00
PHST- 2011/08/30 06:00 [entrez]
PHST- 2011/08/30 06:00 [pubmed]
PHST- 2012/02/07 06:00 [medline]
AID - pcr119 [pii]
AID - 10.1093/pcp/pcr119 [doi]
PST - ppublish
SO  - Plant Cell Physiol. 2011 Oct;52(10):1822-31. doi: 10.1093/pcp/pcr119. Epub 2011 
      Aug 26.