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Lipids of the Gametophyte and Sporophyte of Funaria hygrometrica. Comparison with Lipids from Leaves of Vascular Plants
Redha H. Al-Hasan, Wagieh E. El-Saadawi, Ali M. Ali and Samir S. Radwan
Vol. 93, No. 1 (Spring, 1990), pp. 44-49
Published by: American Bryological and Lichenological Society
Stable URL: http://www.jstor.org/stable/3243547
Page Count: 6
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The total lipid content of Funaria hygrometrica Hedw. increased during development and the sporophyte contained more lipids than the gametophyte. These differences were due to the accumulation in the sporophyte of nonpolar lipids such as triacylglycerols, steryl esters, and aliphatic alcohol esters, which occurred only in small amounts, if at all, in leaves of vascular plants. The major polar lipids in all extracts were monogalactosyldiacylglycerols, digalactosyldiacylglycerols, sulfoquinovosyldiacylglycerols, and diacylglycerophosphoglycerols. The concentration of these four lipid classes was highest in vascular plant leaves and lowest in the moss sporophyte. In the moss the lipids decreased during development and were more abundant in the gametophyte than the sporophyte. Linolenic acid was the predominant acyl moiety in total lipids and individual galactolipids of leaves, but not of the gametophyte or sporophyte of the moss. Although most lipid classes of the sporophyte were richer in linolenic acid than the corresponding classes of the gametophyte, the sporophyte galactolipids were poorest in this polyunsaturated fatty acid. These findings correlate with the well known weak photosynthetic activity of mosses relative to vascular plants.
The Bryologist © 1990 American Bryological and Lichenological Society