Abstract
Analyses were made of chlorophyll a and b and fatty acids (18:3, 18:2, 18:1, 18:0, 16:2, 16:1, and 16:0) of greening and senescing leaf tissue. Those dark-grown tissues given a prior treatment of red, far red, or red followed by far red light showed similar increases in chlorophylls and linolenate (18:3) when exposed to continuous white light. In contrast, green barley (Hordeum vulgare L.) leaves placed in the dark lost chlorophylls and fatty acids, especially 18:3. Senescing cocklebur (Xanthium strumarium L.) leaf tissue showed a decline in chlorophyll and fatty acids, especially again 18:3. Abscisic acid, but not sucrose, accelerated these senescent changes. Radioactive acetate incorporation into the galacto-lipids and phospholipids of senescing cocklebur leaf tissue increased and then the radioactivity of the lipids decreased in senescent tissues.
Full text
PDF
Selected References
These references are in PubMed. This may not be the complete list of references from this article.
- KATES M. SIMPLIFIED PROCEDURES FOR HYDROLYSIS OR METHANOLYSIS OF LIPIDS. J Lipid Res. 1964 Jan;5:132–135. [PubMed] [Google Scholar]
- KOSKI V. M. Chlorophyll formation in seedlings of Zea mays L. Arch Biochem. 1950 Dec;29(2):339–343. [PubMed] [Google Scholar]
- Klopfenstein W. E., Shigley J. W. Changes in fatty acid composition of sulfolipid and phospholipids during maturation of alfalfa. J Lipid Res. 1967 Jul;8(4):350–351. [PubMed] [Google Scholar]
- NEWMAN D. W. Fatty acids of bush bean leaf chloroplasts and proplastids. Biochem Biophys Res Commun. 1962 Sep 25;9:179–183. doi: 10.1016/0006-291x(62)90110-9. [DOI] [PubMed] [Google Scholar]
- Newman D. W. The effect of red and far red light on the desaturation of Fatty acids in barley leaves. Plant Physiol. 1971 Sep;48(3):300–302. doi: 10.1104/pp.48.3.300. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Trémolières A., Lepage M. Changes in Lipid Composition during Greening of Etiolated Pea Seedlings. Plant Physiol. 1971 Feb;47(2):329–334. doi: 10.1104/pp.47.2.329. [DOI] [PMC free article] [PubMed] [Google Scholar]