Estimation of phytoplankton photosynthesis using a fluorescence induction technique

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Abstract
An improved method for estimation of phytoplankton photosynthesis was developed using in-vivo chlorophyll a fluorescence, and was tested with cultured phytoplankton. The method is based on a kinetic analysis of the fluorescence induction with and without DCMU. Photosynthetic rates were derived from, (i) measurement of fluorescence induction due to the reduction of Q, the primary electron acceptor for the photoreaction of photosystem II, and (ii) estimation of Q present in the water sample and of the rate of Q reduction.

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