FATTY ACID AND ALDEHYDE COMPOSITIONS IN PHOSPHOLIPIDS OF SELENOMONAS RUMINANTIUM WITH REFERENCE TO GROWTH CONDITIONS

Abstract

Fatty acid and aldehyde compositions of phospholipids from Selenomonas ruminantium cells, grown under various nutritional conditions, were examined. When the cells were grown in a lactate medium or in a glucose medium supplemented with odd-numbered volatile fatty acid (valerate or heptanoate), fatty acid side chains in phospholipids were composed mainly of C_15:0 and C_15:1. The major fatty aldehydes in plasmalogens were C_17:1 and C_15:0. When cells were grown in a glucose medium supplemented with even-numbered volatile fatty acid (butyrate, caproate, or caprylate), the major fatty acids in phospholipids were C_16:1 and C_14:0. The main fatty aldehyde in plasmalogens was C_16:1. ¹⁴C-Valerate or caproate, supplemented to the glucose medium, was incorporated into the aldehyde side chains of plasmalogens.