Abstract:Nove novos sinônimos, um neótipo e três lectotipificações de espécies de Croton são propostos. Além disso, C.schomburgkianus A. P. S. Gomes & M. F. Sales é designada como um novo nome para C. nervosus Klotzsch. Na seção Argyroglossum Baill., Croton argyroglossus Baill. e C. micans var. argyroglossus Baill. são sinonimizadas sob C. argyrophyllus Kunth; C. alagoensis Müll. Arg. e C. floribundus var. piauhiensis Rizzini sinonimizadas sob C. blanchetianus; C. micans var. pubescens Müll. Arg., Croton argyrophyl… Show more
“…We recently showed that the essential oil of leaves from Croton argyrophyllus Kunth displays anti‐inflammatory activity in rodents, as evidenced by the significant inhibition of oedema formation and leukocyte influx induced by carrageenan . In the same study, we also showed that the essential oil of C .…”
Section: Introductionmentioning
confidence: 99%
“…The literature suggests that the essential oil obtained from species of Croton has multiple biological effects, such as antinociceptive, antiinflammatory, healing and antihypertensive. [4][5][6][7][8] We recently showed that the essential oil of leaves from Croton argyrophyllus Kunth [9,10] displays anti-inflammatory activity in rodents, as evidenced by the significant inhibition of oedema formation and leukocyte influx induced by carrageenan. [11] In the same study, we also showed that the essential oil of C. argyrophyllus leaves presents an antioxidant activity, which could be, in part, responsible for the anti-inflammatory actions.…”
“…We recently showed that the essential oil of leaves from Croton argyrophyllus Kunth displays anti‐inflammatory activity in rodents, as evidenced by the significant inhibition of oedema formation and leukocyte influx induced by carrageenan . In the same study, we also showed that the essential oil of C .…”
Section: Introductionmentioning
confidence: 99%
“…The literature suggests that the essential oil obtained from species of Croton has multiple biological effects, such as antinociceptive, antiinflammatory, healing and antihypertensive. [4][5][6][7][8] We recently showed that the essential oil of leaves from Croton argyrophyllus Kunth [9,10] displays anti-inflammatory activity in rodents, as evidenced by the significant inhibition of oedema formation and leukocyte influx induced by carrageenan. [11] In the same study, we also showed that the essential oil of C. argyrophyllus leaves presents an antioxidant activity, which could be, in part, responsible for the anti-inflammatory actions.…”
“…[7][8][9] Nowadays, that plant species has been correctly identified as C. blanchetianus Baill., and a few reports mention that C. sonderianus and C. blanchetianus are indeed synonyms. 10,11 Several biological activities of Croton species have been reported, among them: the antimalarial action and low acute and subacute toxicity of the leaf extract of Croton macrostachyus, 1 the inhibition of chikungunya virus replication by Croton mauritianus leaf extract, 12 the antiulcerogenic action and the low acute and subacute toxicity of Croton urucurana extract. 13 Ethanol extracts of the trunks, leaves, and seeds of Croton tiglium showed some antifungal activities against three dermatophytes.…”
In this study, acid and neutral fractions and three diterpenes were isolated from the hexane extracts from roots of three individual specimens of Croton blanchetianus Baill., collected from the same geographical site. Moreover, the antimicrobial activity of the extracts, fractions and diterpenes isolated was evaluated against Streptococcus mutans and Streptococcus parasanguinis, bacteria related with dental caries. The structures of the diterpenes were elucidated mainly by 1D and 2D nuclear magnetic resonance (NMR) spectroscopy, and high-resolution mass spectrometry, such as methyl 12-hydroxy-3,4-seco-cleistanta-8,11,13,15,4(18)-pentaene-3-oate; ent-3,4-secoatisa-4(18),16-dien-3-oic acid and a novel diterpene 3,4-seco-beieren-3-oic acid. Regarding to the antimicrobial activity, in general, all extracts, the neutral and acid fractions of the hexane extracts roots of all three specimens, showed antimicrobial activity in concentrations ranging from 500 to 7.8 µg mL -1 . In addition, the three diterpenes isolated showed bactericidal and bacteriostatic activity against S. mutans and S. parasanguinis, suggesting them as alternative agents with the potential to prevent oral diseases.
<p>Se realizó una sinopsis taxonómica del género Croton en los Andes de Mérida, Venezuela. Se analizaron caracteres vegetativos en 245 especímenes y se hizo un análisis de agrupamiento que resultó en la identificación de 21 grupos discretos a los cuales les fueron asignadas las identidades taxonómicas específicas más apropiadas. De estas 21 especies, C. pedicellatus representa un nuevo registro para Venezuela, C. fragilis, C. speciosus y C. redolens son nuevos registros para la región andina. Se proponen 2 nuevos sinónimos (C. chamanus bajo C. conduplicatus y C. timotensis bajo C. pungens) y se designan 3 lectotipos (C. pungens, C. ovalifolius y C. speciosus). Se discuten las relaciones entre las especies y se incluye una clave para su identificación.</p>
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