Acclimation to temperature and irradiance modulates PSII charge recombination.
Acclimation of wild type and the chlorina F2 mutant of barley to either high light or low temperature results in a 2- to 3-fold increase in non-photochemical quenching which occurred independently of either energy-dependent quenching (qE), xanthophyll cycle-mediated antenna quenching or state transitions. Results of in vivo thermoluminescence measurements used to address this conundrum indicated that excitation pressure regulates the temperature gap for S(2)Q(B)(-) and S(2)Q(A)(-) charge recombinations within photosystem II reaction centers. This is discussed in terms of photoprotection through non-radiative charge recombination.
Ivanov
A G
AG
Department of Biology and The Biotron, University of Western Ontario, London, Canada N6A 5B7.
Sane
P V
PV
Krol
M
M
Gray
G R
GR
Balseris
A
A
Savitch
L V
LV
Oquist
G
G
Hüner
N P A
NP