Abstract
Phytol-U-(14)C was adsorbed on algae and ingested in this form by zooplanktonic copepods (two species of Calanus). The lipids of these animals were analyzed after 48 hr and found to contain radioactive pristane and radioactive phytanic acid. The conversion of phytol to pristane by the copepods is interpreted as a likely biological source of pristane in nature.
Highlights
Phytol-U-14Cwas adsorbed on algae and in- ing to pristane the phytol normally present in their gested in this form by zooplanktonic copepods
Phytol-U-14C was prepared from a commercially obtained nonsaponifiable lipid fraction of THE SATURATED NORDITERPANE, pristane, occurs in Chlorella grown on l4COZ (Volk Radiochemical Co., Burbank, Calif.). 1 mg of carrier phytol was added to various geological sediments and crude oils [1] and its about 50 ~c of 14C-labeled nonsaponifiable lipid fraction presence has been generally considered to be evidence and for a biological contribution to the formation of hydro- chrornatographed on thin layers of silica gel in benzenecarbons in nature
A likely precursor of pristane is the ethyl acetate 4 : 1. T h e phytol zone was eluted and an monounsaturated diterpenyl alcohol, phytol, which aliquot was subjected to gaq-liquid chromatography (GLC) on a colunin containing occurs as an ester in chlorophyll and is ubiqui- 10% ethylene glycol succinate polyester (EGS) on Gas-Chroni P (Applied Science Laboratously present in the flora of the past and the present. tories Inc., State College, Pa.) at 180°C
Summary
Phytol-U-14Cwas adsorbed on algae and in- ing to pristane the phytol normally present in their gested in this form by zooplanktonic copepods Pristane has been found in many marine organisms [2], graphic fractions were collected and their radioactivity the most striking example being the planktonovorous was determined. Several chromatographic fractions, including the ones with retention times corresponding to those of pristane and phytane, were collected and their radioactivity was determined.
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