Abstract

Abstract Using a bare platinum polarographic electrode, standard reproducible time courses of O2 exchange rates are established for the marine alga Ulva lactuca. Typical transient responses of O2 exchange to 1 sec light flashes are presented and their relationship to the experimental apparatus is discussed. Some newly reported transient components of the time course curves are named and variations due to light intensity and quality are studied. The suitability of this type of alga for physiological studies of the photosystems is apparent.

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