Variability of Essential Oil Content and Composition of Origanum vulgare L. Populations from a North Mediterranean Area (Liguria Region, Northern Italy)
Native for test populations of Origanum vulgare L. from the Liguria and Emilia regions of northern Italy were analysed for essential oil content and composition. Morphological characters suggested that the Ligurian samples belonged to the ssp. viride. The essential oil content of in¯orescences ranged from less than 5 mg gÿ1 in the samples from Emilia, to more than 50 mg gÿ1 in some Ligurian samples, values similar to those reported for ssp. hirtum from southern Italy.
Sixty-four compounds were identi®ed in the essential oil. The samples were allotted to three main groups on the basis of oil composition: the ®rst group had a high content of components belonging to the carvacrol/thymol biosynthetic pathway; the second was characterized by a dierent sesquiterpene composition and a high linalool content; and the third, including the two samples of ssp. vulgare from Emilia, was characterized by the presence of abundant sesquiterpenes. The high essential oil content of the samples studied, and the presence of some particular morphological characters suggest that the taxonomy of O. vulgare, especially in its western distribution area, needs further investigation. Linalool types, although often not considered as `typical oregano’, may be useful in promoting wider utilization of the biodiversity of this species.
Key words: Oregano, Origanum vulgare L., ssp. viride, ssp. vulgare, ssp. hirtum, essential oil, gas chromatography, mass spectrometry, genetic resources, chemotypes, quality, Mediterranean.
Effect of Origanum vulgare Extract on Immune Responses and Heamatological Parameters of Rainbow Trout (Oncorhynchus mykiss)
In this study, Origanum vulgare extract was used to evaluate its effects on immune responses and hematological parameters of rainbow trout (Oncorhynchus mykiss). Six hundred (600) averages mean weight 13±0.05g rainbow trout (Oncorhynchus mykiss) were randomly allocated into two groups including placebo-treated group (control), and Origanum vulgare extract-treated group, each of three replicates.
The fishes were hand-fed once a day with diet medicated placebo or Origanum vulgare extract (OE) at a rate of 1% of feed weight in the first feeding for 8 weeks. At the end of every two weeks 24hrs after feeding, fish were bled from caudal vein and blood samples were analyzed for some of hematological and immunological parameters.
The results showed that serum total protein, albumin and globulin, respiratory burst activity, phagocytic activity and serum lysozyme activity vary among the two treatment groups which were found to be higher in OE-treated group (P<0.05). It was concluded that supplementation of OE at a rate of 1% registered higher immunological responses. Therefore, dietary inclusion of OE could improve nonspecific immune responses in rainbow trout. Future studies to determine optimal herb mixtures and dietary levels should be conducted.
Keywords: Herbal immunostimulant; Iranian medicinal plants; Origanum vulgare; Fish>< 0.05)
It was concluded that supplementation of OE at a rate of 1% registered higher immunological responses. Therefore, dietary inclusion of OE could improve nonspecific immune responses in rainbow trout. Future studies to determine optimal herb mixtures and dietary levels should be conducted.
Keywords: Herbal immunostimulant; Iranian medicinal plants; Origanum vulgare; Fish
More information: https://juniperpublishers.com/ofoaj/pdf/OFOAJ.MS.ID.555687.pdf