Use of a light-induced respiratory transient to measure the optical cross section of photosystem I in chlorella.

A method has been developed whereby the magnitude of a transient in O(2) uptake attributable to photosystem (PS) I activity, following single-turnover laser flashes of varying energy, can be used to measure the optical cross section of PSI. As measurements are made under the identical physiological conditions for which the cross section of PSII has… CONTINUE READING