Claim · model-written summary
Similarities between light-intensity adaptation and the state II to state I transition suggest that both involve LHC II dephosphorylation, possibly triggered by the cytochrome b6/f complex.
- Taxon
- higher plantsEmbryophytat0
- Gene
- LHC IIe1
- Outcome
- adaptation phenomenae1
- Qualifier
- possibly triggered by the cytochrome b 6 / f complexe1
Not reportedMaterialCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentComparatorSettingDirectionValue
Verbatim
t0“ADAPTATION OF HIGHER PLANTS TO CHANGING LIGHT INTENSITIES”
e1“The similarities between the adaptation to increased light intensity and the state II to state I transition suggest that both adaptation phenomena involve LHC II dephosphorylation possibly triggered by the cytochrome b 6 / f complex”
Title
Holger Dau; Ora Canaani Photochemistry and Photobiology 1992. doi:10.1111/j.1751-1097.1992.tb08536.x
Other claims from this paper (10)
- Intervention effect An increase in light intensity caused a large biphasic increase (up to 120%) in the yield of oxygen evolution in intact leaves.
- Association The fast phase of the increase in oxygen yield was coupled to a decrease of fluorescence in intact leaves.
- Association The slow phase of the increase in oxygen yield was coupled to an increase in the antenna size of photosystem II in intact leaves.
- Intervention effect The slow phase was not inhibited by the uncoupler Nigericin.
- Association The slow phase was absent in chlorophyll-b-less barley mutants deficient in LHC II.
- Mechanism Changes in LHC II-mediated energy distribution, occurring over minutes, are involved in adaptation to changing light intensities.
- Mechanism Electrophoretic analysis suggests that the slow phase of the oxygen-evolution increase involves dephosphorylation of the 25 kDa polypeptide of LHC II, by a small extent of 12%.
- Mechanism The trigger for the slow phase of the oxygen-yield increase does not involve oxidation of the plastoquinone pool.
- Intervention effect In response to increased light intensity, the plastoquinone pool became more reduced, as judged by model calculations.
- Mechanism Nigericin experiments suggest that the control of the slow phase of adaptation to increased light intensity is not exerted by the pH gradient across the thylakoid membrane.