Figure 6.
Chlorophyll Fluorescence Induction and Redox States of P700 in Wild-Type and atcnfU2 Mutant Leaves.
(A) Fluorescence induction curve of 24-d-old wild-type, atcnfU2-1, and atcnfU2-2 mutant leaves grown under continuous light without sucrose. Representative traces of three to five independent experiments are shown. ML, measuring light beam; AL, white actinic light (520 μmol/m2/s); Fm, maximum fluorescence yield; Fo, minimum fluorescence yield when PSII centers are open.
(B) The oxidation of P700 in 25-d-old wild-type, atcnfU2-1, and atcnfU2-2 leaves (24 mm2 each) grown as above was induced by exposure to far-red light (FR; 30 W/m2) for 2 min. Representative traces of five to seven independent experiments are shown.