Table II.

Energy transfer from phycocyanin to PSI in thylakoids

Row A, Energy transfer from phycocyanin to PSI is represented as the ratio of phycocyanin excitation peak at 618 nm to the chlorophyll excitation peak at 673 nm in excitation spectra monitored with fluorescence emission at 718 nm. Row B, Values in row A were corrected based on phycocyanin content relative to chlorophyll, which is represented as absorption peak at 622 nm. Row C, Photosystem stoichiometry is represented as the fluorescence ratio of PSI (F_PSI) to PSII (F_PSII) upon excitation of chlorophyll at 435 nm.

	Wild Type	ΔcpcG2	ΔcpcG1	ΔcpcG2/ΔcpcG1
(A)a Excitation peak ratio	1.13	0.72	1.95	0
(B)a Phycocyanin content	0.48	0.23	0.87	0
(C) FPSI/FPSII (excitation at 435 nm)	4.57	5.12	1.37	2.52
(D) = A/BC	0.51	0.61	1.64	–

^aValues in A and B were corrected for contribution of chlorophyll in ΔcpcG2/ΔcpcG1.