| | 1 | Author
| Hartm Ut Kayser | Requires cookie* | | | Title
| Carotenoid Biogenesis in the Stick Insect, Carausius morosus, during a Larval Instar  | | | | Abstract
| [14C]/?-Carotene was fed to juvenile stick insects, Carausius morosus, o f the fifth instar. Radio activity was incorporated into 2-hydroxy-, 2-oxo-, and 3,4-didehydro-2-oxo-carotenoids o f the ß,ß-type. These transformations are due to the insect's own capacity; any contribution by microbial symbionts can be ruled out. A study on the labelling kinetics clearly shows that the biogenesis of hydroxy-and oxo-carotenoids is correlated to a decrease in the carotene precursor, but only up to mid instar. Thereafter, oxidation o f the carotene is very low but the transformations of its metabolites continue as before. Predominantly ß,^-carotene-2,2'-diol is dehydrogenated to 3,4,3',4'-tetradehydro-/?,/?-carotene-2,2'-dione via two hydroxyketones. This discontinuous utilization o f /7-carotene could be due to a stop at mid instar either in the oxidation or in the absorption in the gut o f this precursor. | | | |
Reference
| Z. Naturforsch. 37c, 13 (1982); received September 11/October 281981 | | | |
Published
| 1982 | | | |
Keywords
| Carotenoids, Metabolism, [14C]/?-Carotene, Insects, Carausius morosus | | | |
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| default:Reihe_C/37/ZNC-1982-37c-0013.pdf | | | | Identifier
| ZNC-1982-37c-0013 | | | | Volume
| 37 | |
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