Search results for "LAMIACEAE"
showing 10 items of 107 documents
Disentangling the role of heat and smoke as germination cues in Mediterranean Basin flora
2010
9 páginas, 1 figura, 4 tablas.
An outline revision of the subsection Gymnocarpae Font Quer of the genus Sideritis L. (Lamiaceae) in the western part of the Mediterranean region
1990
PERIS, J. B., STUBING, G. & FIGUEROLA, R., 1990. An outline revision of the subsection Gymnocarpae Font Quer of the genus Sideritis L. (Lamiaceae) in the western part of the Mediterranean region. A monographic study of the subsection Gymnocarpae Font Quer has been carried out in which eleven species have been recognized: Sideritis incana L., S. lacaitae Font Quer, S. cuatrecasasii Peris, Stubing & Figuerola, sp. nov., S. sericea Pers., S. oromaroccana Peris, Stubing & Figuerola, nom. nov., S. guyoniana Boiss. & Reuter, S. altiatlantica (Font Quer) Peris, Stubing & Figuerola, comb. & stat. nov., S. glauca Cav., S. atlantica Pomel, S. regimontana (Maire) Peris, Stubing & Figuerola, comb. & st…
Cytotoxic Activity of Some Natural and Synthetic ent-Kauranes
2007
Atractyligenin (1) and several synthetic derivatives were tested and found to be active against tumor cell replication. Compound 1 was readily converted to the 2,15-diketo (3) or 15-keto (4) derivatives, which contain an alpha,beta-unsaturated ketone. Compounds 3 and 4 showed significant cytotoxic activity against all six tested cancer cell lines and were most potent against 1A9 ovarian cancer cells with EC50 values of 0.2 and 0.3 microM, respectively. These two 1-analogues are promising lead compounds for further investigation.
Occurrence of (+)-6-desoxyandalusol in Stachys ionica and Stachys distans
2002
Thymus vulgaris subsp. mansanetianus subsp. nov. (Lamiaceae)
2013
RESUMEN: Se describe una nueva subespecie de Thymus vulgaris L. (Lamiaceae); Th. vulgaris subsp. mansanetianus subsp. nov., caracterizada por presentar un hábito postrado, tallos estoloníferos, decumbentes y radicantes, hojas muy estrechas y una floración otoñal. ABSTRACT: Thymus vulgaris subsp. mansanetianus subsp. nov. (Lamiaceae). A new subspecies of Thymus vulgaris L. (Lamiaceae); Th. vulgaris subsp. mansanetianus subsp. nov. is described. This new subspecies is characterized by its prostrate habit, stoloniferous stems, prostrate and rooting at the nodes, very narrow leaves, autumn flowering period.
Activity against microorganisms affecting cellulosic objects of volatile constituents of Leonotis nepetaefolia from Nicaragua
2014
The chemical composition of the essential oil from aerial parts of L. nepetaefolia (L.) R. Br. collected in Nicaragua was evaluated by GC and GC-MS. The main components were (Z)-phytol (22.8%), caryophyllene oxide (18.9%) and hexahydrofarnesylacetone (9.0%). The antibacterial activity against several Gram + and Gram-bacteria, including Bacillus cereus and B. subtilis, both infesting historical cellulosic material, was also determined. B. cereus, B. subtilis and Staphylococcus epidermis were the most affected by the action of the oil.
Diterpenoids in the essential oils from the genus Stachys
2009
The occurrence of diterpenoids in the essential oils of the species of the genus Stachys (Lamiaceae, Labiatae) is reviewed.
Neoclerodanes from Teucrium orientale
2004
Abstract Two new neoclerodane diterpenoids, 6-deacetyl-teucrolivin A (5) and 8beta-hydroxy-teucrolivin B (6), were isolated from the aerial parts of Teucrium orientale, along with four already known neoclerodane diterpenoids, teucrolivin A (1), teucrolivin B (2), teucrolivin C (3) and teucrolivin H (4), previously isolated from Teucrium oliverianum. Their structures were elucidated on the basis of spectroscopic evidence and chemical transformations. Compounds 1-3 were assayed for antifeedant activity against Spodoptera littoralis, S. frugiperda and Heliocoverpa armigera. Teucrolivin A was the most potent of the three compounds tested.
Kaurane diterpenoids from three Sideritis species
2005
Some kaurane diterpenoids were isolated from 3 species of the genus Sideritis (Lamiaceae) growing in the Eastern Mediterranean region. Sideritis libanotica subsp. libanotica contained siderol 2 and sideridiol 3. Sideritis erythrantha var. erythrantha yielded sideridiol 3. Sideritis perfoliata gave siderol 2, sideridiol 3 and sideritriol 4. The products are known as they occur in another species of Sideritis growing in Italy and in other species growing also in Turkey. The products are isolated for the first time from these 3 species. The taxonomic significance of these results is discussed.