| In vitro: |
| Molecules. 2010 Apr 22;15(4):2911-24. | | Organic extractives from Mentha spp. honey and the bee-stomach: methyl syringate, vomifoliol, terpenediol I, hotrienol and other compounds.[Pubmed: 20428087] |
METHODS AND RESULTS:
The GC and GC/MS analyses of the solvent organic extractive from the stomach of the bees, having collected Mentha spp. nectar, revealed the presence of methyl syringate (6.6%), terpendiol I (5.0%) and vomifoliol (3.0%) that can be attributed to the plant origin. Other major compounds from the bee-stomach were related to the composition of cuticular waxes and less to pheromones. Organic extractives from Mentha spp. honey were obtained by solvent-free headspace solid-phase microextraction (HS-SPME) and ultrasonic solvent extraction (USE) and analyzed by GC and GC/MS. The major honey headspace compounds were hotrienol (31.1%-38.5%), 2-methoxy-4-methylphenol (0.5-6.0%), cis- and trans-linalool oxides (0.9-2.8%), linalool (1.0-3.1%) and neroloxide (0.9-1.9%). Methyl syringate was the most abundant compound (38.3-56.2%) in the honey solvent extractives followed by vomifoliol (7.0-26.6%).
CONCLUSIONS:
Comparison of the honey organic extractives with the corresponding bee-stomach extractive indicated that methyl syringate and vomofoliol were transferred to the honey while terpendiol I was partially transformed to hotrienol in ripened honey. | | Phytochemistry, 1984, 23(12):2769-71. | | Metabolism of abscisic acid: Bacterial conversion to dehydrovomifoliol and vomifoliol dehydrogenase activity.[Reference: WebLink] |
METHODS AND RESULTS:
A species of Corynebacterium, capable of metabolizing abscisic acid (ABA), was isolated from soil. The organism converted ABA to dehydroVomifoliol [(±)-1′-hydroxy-4′-keto-α-ionone] as the major metabolise. A cell-free extract exhibited Vomifoliol dehydrogenase activity.
CONCLUSIONS:
This suggests that Vomifoliol is most likely the immediate precursor of dehydroVomifoliol. |
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