Data/hora: 08/06/2024 09:43:21

Biblioteca(s): 	Embrapa Amazônia Oriental.	
Data corrente: 	26/08/2016	
Data da última atualização: 	24/05/2022	
Autoria: 	PEREIRA, S. G.; SOARES, A. M. dos S.; GUILHON, G. M. S. P.; SANTOS, L. S.; PACHECO, L. C.; SOUZA FILHO, A. P. da S.	
Afiliação: 	S. G. PEREIRA, UNIVERSIDADE FEDERAL DO MARANHÃO; A. M. dos S. SOARES, UNIVERSIDADE FEDERAL DO MARANHÃO; G. M. S. P. GUILHON, UFPA; L. S. SANTOS, UFPA; L. C. PACHECO, UFPA; ANTONIO PEDRO DA SILVA SOUZA FILHO, CPATU.	
Título: 	Phytotoxic potential of piperine and extracts from fruits of Piper tuberculatum Jaq. on Senna obtusifolia and Mimosa pudica plants.	
Ano de publicação: 	2016	
Fonte/Imprenta: 	Allelopathy Journal, v. 38, n. 1, p. 91-102, 2016.	
Idioma: 	Inglês	
Conteúdo: 	We evaluated the in vitro efficacy of fruits extracts of Piper tuberculatum Jaq. on lhe gennination and growth of Senna obtusifolia and Mimosa pudica and also the phytotoxicity of main compound, piperine. The extracts 01' hexane (HE), ethyl ether (EE), methanol (EM) and hot ethanol (EEq) completely inhibited the germination of M. pudica at 5.0 mg ml,' concentration and only EE caused 62% inhibition in gennination of S. obtusifolia at this concentration. Jn chemical investigation using GC-MS of samples of the extracts EE, EM and EEq, it was found that the concentration of piperine in these extracts was 33.65%, 4533% and 41.88%, respectively. The column chromatography for isolation and purification confinned that piperine was the key compound in EE, EM and EEq extracts. Bioassays with piperine at 0.06, 0.12, 0.25, 0.50 and 100 mg rnl,' concentrations showed significant phytotoxicity to seeds germination and seedling growth 01'both test plants. The mean inhibitory concentration (ICso) for S obtusifolia hypocolyl was 0.86 and 0.98 mg ml." for radicle and the M. pudica ICso values were 0.51 mg ml.' for radicle and 0.53 mg ml,' for hypocotyl, respectively. This research showed that fruits 01' P. tuberculatum plant and the isolated substances were phytotoxic and showed high allelopathic potential.	
Palavras-Chave: 	Crescimento das plântulas; Fitotoxidade.	
Thesagro: 	Pimenta.	
Categoria do assunto: 	F Plantas e Produtos de Origem Vegetal	
Registro original: 	Embrapa Amazônia Oriental (CPATU)	
Exemplares: 	CPATU - (52489-1) - UPC - AP - DD -  -  -  - DIS