Uscian J M, Stanley-Samuelson D W
Department of Entomology, University of Nebraska, Lincoln 68583-0816, USA.
Comp Biochem Physiol Biochem Mol Biol. 1994 Mar;107(3):371-9. doi: 10.1016/0305-0491(94)90200-3.
The fatty acid compositions of phospholipids and triacylglycerols from selected orthognath spider tissues, scorpion body segments, whole millipedes, and whole labidognath spiders were determined. The major components were C16 and C18 saturated and unsaturated fatty acids as well as C20 polyunsaturated fatty acids. The eicosanoid precursor polyunsaturated fatty acids 20:4n-6 and 20:5n-3 were present in substantial proportions of phospholipids in all tissues examined. The fatty acid profiles of these terrestrial arthropods differ markedly from corresponding profiles of terrestrial insects in that substantially greater proportions of C20 polyunsaturated fatty acids are present in the organisms in this study. This finding supports the idea that maintaining low proportions of C20 polyunsaturated fatty acids is a special condition of terrestrial insects.
测定了来自选定的直腭蜘蛛组织、蝎子身体节段、整条千足虫以及整条颚蛛的磷脂和三酰甘油的脂肪酸组成。主要成分是C16和C18饱和与不饱和脂肪酸以及C20多不饱和脂肪酸。二十碳类花生酸前体多不饱和脂肪酸20:4n-6和20:5n-3在所有检测组织的磷脂中占相当大的比例。这些陆生节肢动物的脂肪酸谱与陆生昆虫的相应谱明显不同，因为在本研究的生物体中C20多不饱和脂肪酸的比例要大得多。这一发现支持了这样一种观点，即维持低比例的C20多不饱和脂肪酸是陆生昆虫的一种特殊情况。
