Data/hora: 18/06/2024 04:07:23

Biblioteca(s): 	Embrapa Meio Ambiente.	
Data corrente: 	20/07/2017	
Data da última atualização: 	19/01/2018	
Autoria: 	PORTO, R. S.; RATH, S.; QUEIROZ, S. C. do N. de.	
Afiliação: 	RAFAEL SILVEIRA PORTO, IQ-UNICAMP; SUSANNE RATH, IQ-UNICAMP; SONIA CLAUDIA DO N DE QUEIROZ, CNPMA.	
Título: 	Conyza canadensis: green extraction method of bioactive compounds and evaluation of their antifungal activity.	
Ano de publicação: 	2017	
Fonte/Imprenta: 	Journal Of the Brazilian Chemical Society, v. 28, n. 5, p. 913-919, 2017.	
ISSN: 	1678-4790	
DOI: 	http://dx.doi.org/10.21577/0103-5053.20160228	
Idioma: 	Inglês	
Conteúdo: 	Abastrac: Synthetic fungicides are a common treatment for post-harvest diseases in fruits, although demand is increasing for alternatives such as biopesticides. The aim of this work was to investigate the presence of naturally occurring antifungal compounds in Brazilian specimens of the weed Conyza canadensis. Two compounds [(4Z)-lachnophyllum lactone and (4Z,8Z)-matricaria lactone] were isolated and their antifungal activities were evaluated against eight postharvest disease fungi. Aspergillus niger, Cladosporium sp., and Penicillium digitatum proved susceptible to the treatment (minimum inhibitory concentrations varying from 32 to 64 µg mL-1). These fungi are common postharvest pathogens of fruits and vegetables, causing rots and secreting mycotoxins. A green and sustainable extraction method employing pressurized hot water was developed and optimized (100 °C, 4 × 1 min cycles). Yields of 1.46 and 0.24 mg g-1 were obtained for (4Z)-lachnophyllum lactone and (4Z,8Z)-matricaria lactone, respectively. The extract could be applied directly to fruits and vegetables in postharvest treatments.	
Palavras-Chave: 	Atividade antifúngica; Biopesticida.	
Thesagro: 	Doença de planta; Extrato vegetal; Planta produtora de pesticida; Pós-colheita.	
Thesaurus Nal: 	Antifungal properties; Biopesticides; Conyza canadensis; Plant extracts.	
Categoria do assunto: 	F Plantas e Produtos de Origem Vegetal	
URL: 	http://ainfo.cnptia.embrapa.br/digital/bitstream/item/161951/1/2017NT01.pdf	
Registro original: 	Embrapa Meio Ambiente (CNPMA)	
Exemplares: 	CNPMA - (15542-1) - UPC - AP - DD -  -  -  - DIS