Cadmium inhibits epoxidation of diatoxanthin to DIADINOXANTHIN (cas 18457-54-0) in the xanthophyll cycle of the marine diatom Phaeodactylum tricornutum

Add time:09/10/2019    Source:sciencedirect.com

Cd has pleiotropic effects on plant physiology and in particular on photosynthesis. It has not been established yet if Cd alters the functioning of the xanthophyll cycle. To answer this question, an exponentially growing culture of the marine diatom Phaeodactylum tricornutum was incubated with Cd (20 mg/l) for 24 h and irradiated with a light activating the xanthophyll cycle, which in diatoms, consists of the reversible deepoxidation of DIADINOXANTHIN (cas 18457-54-0) to diatoxanthin. The measurements show that the deepoxidation step is not influenced by Cd. In contrast, the Cd concentration used sharply inhibits the epoxidation of diatoxanthin to diadinoxanthin.

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