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Thymus camosus Boiss.: effect of harvesting period, collection site and type of plant material on essential oil composition

2005Journal article Restricted access
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dc.contributor.authorMiguel, Maria Graça
dc.contributor.authorDuarte, João
dc.contributor.authorFigueiredo, A. C.
dc.contributor.authorBarroso, Jorge G.
dc.contributor.authorPedro, Luis G.
dc.date.accessioned2015-06-15T14:53:31Z
dc.date.available2015-06-15T14:53:31Z
dc.date.issued2005
dc.description.abstractThe essential oils, isolated by hydrodistillation, from the flowers and the remaining aerial parts (leaves plus stems) from three populations of Thymus carnosus Boiss., collected at different harvesting periods and in three collection sites of Portugal (QL, LM and LA) were analyzed by GC and GUMS. The oil yields from the flowers collected in LA, QL and LM were six, four and one-fold higher, respectively, than the average oil yields from the remaining aerial parts. Monoterpenes were dominant in all oils (> 86%), and sesquiterpenes accounted for 1-6% of the total oils. Diterpenes, phenylpropanoids and non-terpenoid compounds were present in all oils (0.1-0.6%, trace amounts and t-0.4%, respectively). Borneol (26-31%) andcamphene (9-18%) dominated QL oils and borneol (18-23%), terpinen-4-ol (11-19%) and camphene (8-10%) were the main components of LM oils. LA oils showed high variability in the dominant components, cis-sabinene hydrate (14%), terpinen-4-ol (12%) and borneol (11%) being the main components in the flower oil. Terpinen-4-ol (18%) and borneol (18%) dominated the vegetative phase oil, whereas borneol (21%) and terpinen-4-ol (16%) dominated the aerial parts oils collected in May and July, respectively. QL oils can be classified as a borneol/camphene chemotype and one of the LA samples as borneol/cis-sabinene hydrate/terpinen-4-ol chemotype. However, all the other LM and LA samples do not fit within the previously defined chemotypes.
dc.description.versioninfo:eu-repo/semantics/publishedVersion
dc.identifier.doi10.1080/10412905.2005.9698950
dc.identifier.issn1041-2905
dc.identifier.urihttp://hdl.handle.net/10400.1/6318
dc.language.isoeng
dc.publisherTaylor & Francis
dc.relation.isbasedonP-000-2MB
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.titleThymus camosus Boiss.: effect of harvesting period, collection site and type of plant material on essential oil composition
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage426
oaire.citation.startPage422
oaire.citation.titleJournal of Essential Oil Research
oaire.citation.volume17
person.familyNameMiguel
person.givenNameMaria da Graça
person.identifier.ciencia-id6110-6FE7-DF28
person.identifier.orcid0000-0003-2507-4228
person.identifier.scopus-author-id35562054500
rcaap.rightsrestrictedAccess
rcaap.typearticle
relation.isAuthorOfPublication2507350f-9e60-4d4a-a096-53e58d93549c
relation.isAuthorOfPublication.latestForDiscovery2507350f-9e60-4d4a-a096-53e58d93549c

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