Data/hora: 25/06/2024 10:55:45

Biblioteca(s): 	Embrapa Agroindústria de Alimentos; Embrapa Amazônia Ocidental.	
Data corrente: 	12/07/2012	
Data da última atualização: 	17/07/2012	
Autoria: 	AZEVEDO, M. M. B.; PEREIRA, A. Q.; CHAVES, F. C. M.; BIZZO, H. R.; ALVIANO, C. S.; ALVIANO, D. S.	
Afiliação: 	FRANCISCO CELIO MAIA CHAVES, CPAA; HUMBERTO RIBEIRO BIZZO, CTAA.	
Título: 	Antimicrobial activity of the essential oils from the leaves of two morphotypes of Croton cajucara Benth.	
Ano de publicação: 	2012	
Fonte/Imprenta: 	Journal of Essential Oil Research, v. 24, n. 4, p. 351-357, jul. 2012.	
DOI: 	10.1080/10412905.2012.692902	
Idioma: 	Inglês	
Conteúdo: 	Croton cajucara Benth. (Euphorbiaceae) is a shrub native to Amazon region and locally known as sacaca. Two morphotypes are known, namely white ?sacaca? and red ?sacaca?. The essential oils from the leaves of these morphotypes are rich in linalool and 7-hydroxycalamenene, respectively. The effectiveness of the oils from forty individuals from a germplasm bank regarding the antimicrobial activity against Staphylococcus aureus and Candida albicans was investigated by drop diffusion (or agar diffusion) method. Expressive inhibition zones for both microorganisms tested were observed. Essential oils rich in 7-hydroxycalamenene were more effective against S.?aureus while linalool-rich essential oils acted inhibiting C.?albicans. The minimal inhibitory (MIC) and microbicidal concentrations of the main constituents of the oils were also determined, using broth dilution assay. It was observed that isolated 7-hydroxycalamenene presented high bactericidal activity, with a MIC of 0.3??g/mL, while for fungicidal activity a MIC of 45??g/mL was recorded. For S.?aureus, the isolated 7-hydroxycalamenene was more active than the whole oil, whereas the linalool-rich essential oil presented higher bactericide activity than pure linalool. For C.?albicans, however, pure linalool was more active than the whole essential oil.	
Palavras-Chave: 	7-hydroxycalamenene; Atividade antimicrobiana; Composição do óleo essencial; Sacaca.	
Thesagro: 	Cândida Albicans; Óleo Essencial; Staphylococcus Aureus.	
Thesaurus Nal: 	Croton cajucara; linalool.	
Categoria do assunto: 	--
X Pesquisa, Tecnologia e Engenharia	
Registro original: 	Embrapa Amazônia Ocidental (CPAA)	
Exemplares: 	CPAA - (24652-1) - UPC - AP - PP - S8904 -  - S8904 - DIS
CTAA - (11394-1) - UPC - AP - PP - 2012/031 -  - 2012.00031 - DIS