Chlorophyll fluorescence induction in anaerobic Scenedesmus obliquus.

摘要: Abstract Fluorescence time curves (Kautsky effect) were studied in anaerobic Scenedesmus obliquus , with an apparatus capable of simultaneous recording O 2 exchange, and far-red actinic illumination. Results, as interpreted terms electron transport reactions, suggest: In the course becoming anaerobic, fluorescence induction undergoes a series changes, indicating at least three different effects absence on transport. (1) Immediately removal once pool intermediates between two photo-systems is reduced by light reaction II, flow stops, resulting high yield cessation evolution. appears to regulate linear cyclic feedback electrons intermediate pool. (2) An endogenous reductant formed anaerobically reduces System II acceptors dark. The this reduction biphasic, indicative inhomogeneity primary acceptor Prolonged dark treatment induces maximal initial which decays rapidly I action spectrum. (3) Anaerobic eventually results deactivation oxidizing side limiting even when are oxidized pre-illumination.