Topic
Teucrium marum
About: Teucrium marum is a research topic. Over the lifetime, 22 publications have been published within this topic receiving 439 citations.
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TL;DR: The chemical composition of the essential oil obtained from Teucrium marum subsp. marum (Lamiaceae) was analyzed by GC/MS and 30 components were identified.
147 citations
TL;DR: In this article, four cyclopentanoid monoterpenes were isolated from Teucrium marum; they are two C2-epimers of a-(2-formyl-3-methylcyclopentyl)acrylaldehyde and two new isomeric unsaturated lactones.
Abstract: Four cyclopentanoid monoterpenes were isolated from Teucrium marum; they are the two [(A) and (B)] C2-epimers of a-(2-formyl-3-methylcyclopentyl)acrylaldehyde and two new [(C) and (D)] isomeric unsaturated lactones. Structures were established by spectral (u.v., i.r., N.M.R., m.s.) evidence and chemical transformations.
62 citations
TL;DR: C Corsican Teucrium essential oils have the potential to be used as food preservatives and to prevent the growth of nosocomial bacteria and the antibacterial activities are reported for the first time.
61 citations
TL;DR: While the degree of variability of all the characters is very high, there is a good homogeneity between all the taxa, due to the presence of monoterpene cyclopentanoids not found until now in other species.
Abstract: Micromorphology and distribution of trichomes in different plant parts ofTeucrium marum andTeucrium subspinosum from Sardinia and the Balearic Islands are described. The composition of volatile compounds in the same plants has also been studied. The occurrence in Sardinia of two differentT. marum entities is evidenced. One of them, growing in the NW. part of the island, is very similar toT. marum from Minorca.T. subspinosum from Sardinia and Majorca differ for the presence in the last one of short capitate hairs and for a higher ratio of dolichodial/teucrein. While the degree of variability of all the characters is very high, there is a good homogeneity between all the taxa, due to the presence of monoterpene cyclopentanoids not found until now in other species.
39 citations
TL;DR: It is argued that teucrein is the storage compound from which dolichodial is generated during leaf development, and has no anti-insectan potency.
Abstract: The mint plant, Teucrium marum (family Labiatae), sometimes called cat thyme, contains two methylcyclopentanoid monoterpenes, dolichodial and teucrein. The former compound is potently anti-insectan. It is repellent to ants (Monomorium pharaonis) and induces preening reflexes in flies (Phormia regina) and cockroaches (Periplaneta americana). Evidence is presented suggesting that dolichodial, which is presumed to be the plant's chief defensive agent, is stored in the tiny epidermal capsules that beset the leaves. It is only when the leaves are injured (and the capsules ruptured) that the leaves become repellent. Teucrein, in contrast, has no anti-insectan potency. It is present predominantly in the leaf buds, unlike dolichodial, which is present mostly in mature leaves. It is argued that teucrein is the storage compound from which dolichodial is generated during leaf development.
29 citations