Constitution of the surface lipid from the leaves of Brassica oleracea (var. capitata ( Winnigstadt )) - I. Isolation and quantitative fractionation

Abstract

Undamaged cabbage leaves have been subjected to a series of immersions in different solvents. The weight of lipid per unit area of leaf surface has been determined, and the extracts have also been examined by chromatography on films of adsorbent. A representative, uncontaminated sample of the surface lipid can be obtained by immersing the leaves, for 10 s periods, in each of four baths of ether. The surface lipid from the leaves of Brassica oleracea [var. capitata ( Winnigstadt )] has been chromatographically resolved into nine fractions. The proportion of each fraction and the chemical groups it contains have been determined.