Abstract
The setae of Lophocolea heterophylla sporophytes undergo rapid cell elongation with no net loss of lipid. Glycerolipids and sterol esters are the predominant lipids present in unelorigate setae. Phospho- and glycolipids increase dramatically with respect to total lipid during elongation and thus reflect membrane increases. Unusual polyunsaturated fatty acids (arachidonic and eicosapentaenoic) are conspicuous constituents of these lipids.
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