Formation of mesopyrophaeophorbide a during anaerobic bacterial degradation of the marine prymnesiophyte Emiliania huxleyi

Spooner, N., Getliff, J. M., Teece, M. A., Parkes, Ronald John, Leftley, J. W., Harris, P. G. and Maxwell, J. R. 1995. Formation of mesopyrophaeophorbide a during anaerobic bacterial degradation of the marine prymnesiophyte Emiliania huxleyi. Organic Geochemistry 22 (1) , pp. 225-229. 10.1016/0146-6380(95)90019-5

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Abstract

The transformations undergone by chlorophyll a under anoxic conditions have been simulated by using the widespread marine prymnesiophyte Emiliania huxleyi as a substrate for a mixed bacterial community by incubation in a sediment slurry under sulphate reducing conditions. This resulted in the formation of pyrophaeophytin a after 77 days, along with smaller amounts of phaeophorbide a, pyrophaeophorbide a and mesopyrophaeophorbide a, from an original pigment distribution comprising mainly phaeophytin a, with a lower abundance of chlorophyll a. Mesopyrophaeophorbide a has not been reported previously as a product of any chlorophyll a defunctionalization study. Its formation under the conditions used suggests that the reduction of the C-3 vinyl substituent, required for transformation of chlorophyll a to a number of sedimentary porphyrins and chlorins, is a process which involves anaerobic bacterial communities.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Schools > Earth and Environmental Sciences
Uncontrolled Keywords:	chlorophyll a; mesopyrophaeophorbide a; anaerobic bacterial communities; Emiliania huxleyi
Publisher:	Elsevier
ISSN:	0146-6380
Last Modified:	04 Jun 2017 02:07
URI:	https://orca.cardiff.ac.uk/id/eprint/9365

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