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.
|Number of pages||5|
|Publication status||Published - 1995|
- Geochemistry & Geophysics
- LACUSTRINE CHLOROPHYLL DIAGENESIS
Getliff, J. M., Teece, M. A., Spooner, N., Parkes, R. J., Leftley, J. W., Harris, P. G., & Maxwell, J. R. (1995). FORMATION OF MESOPYROPHAEOPHORBIDE A DURING ANAEROBIC BACTERIAL-DEGRADATION OF THE MARINE PRYMNESIOPHYTE EMILIANIA- HUXLEYI. ORG GEOCHEM, 22(1), 225-229.