Summary: Growth-temperature-dependent alterations in the total extractable lipid and polar lipid components of two strains of sp. isolated from a Portuguese hot spring were studied between 50°C and 78°C. The total extractable lipid varied between 8.0 and 10.6% of the cell dry weight; there were no alterations in the phosphorus and carotenoid content of the lipid extract, but the carbohydrate content increased as the growth temperature was raised. Three glycolipids and the four phospholipids were separated by thin-layer chromatography. The relative concentration of the major glycolipid (GL) of strain SPS 17 (yellow-pigmented) increased with the growth temperature, whereas the relative concentration of a minor glycolipid (GL) decreased. There were no temperature-dependent alterations in the relative concentrations of GL and GL from strain SPS 11 (colourless). The proportion of the major phospholipid (PL) decreased in both strains as the growth temperature increased, whereas that of a minor phospholipid (PL) increased. The major fatty acyl chains of both strains were 13-methyltetradecanoate (iso-C) and 15-methylhexadecanoate (iso-C). The GL in strains SPS 11 and SPS 17 had a glucose:glucosamine:glycerol:long fatty acyl chain ratio of 3:1:1:3.


Article metrics loading...

Loading full text...

Full text loading...


Most cited this month Most Cited RSS feed

This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error