ALKYLRESORCINOLS ARE ABUNDANT LIPID COMPONENTS IN DIFFERENT STRAINS OF AZOTOBACTER-CHROOCOCCUM AND PSEUDOMONAS SPP

The occurrence of various amounts of 5-n-alkylresorcinols was shown in lipids extracted from 14 bacterial strains of Azotobacter chroococcum as well as from strains of Pseudomonas aureofaciens, P. chlororapsis, and P. fluorescens. The amount of alkylresorcinols found varied from 2.3 to 56.2 mu g/mg (dry weight) of cells in A. chroococcum and from 0 .2 to 0.8 mu g/mg (dry weight) of cells in Pseudomonas spp. Strains of both genera produce saturated homologs with C-13 to C-27 side chains, C-19, C-21, and C-23 homologs are predominant in and characteristic f or A. chroococum strains, the C-15 homolog is predominant in and chara cteristic for P. chlororapsis and P. fluorescens, and the C-17 homolog is predominant in and characteristic for P. aureofaciens. The presenc e of 5-n-(2-ketoalkyl)resorcinols, not previously observed, was demons trated in lipids isolated from the cells of A, chroococum Az5.