Data/hora: 29/04/2024 13:20:19

Biblioteca(s): 	Embrapa Florestas.	
Data corrente: 	06/08/2007	
Data da última atualização: 	13/02/2015	
Autoria: 	SCHOTTZ, E. de S.; KALIL FILHO, A. N.; TRACZ, A. L.; KOEHLER, H.; RIBAS, L. L. F.; QUOIRIN, M.	
Afiliação: 	Eliane de souza Schottz, UFPR; Antonio Nascim Kalil Filho, Embrapa Florestas; Anderson Luiz Tracz, UFPR; Henrique Koehler, UFPR; Luciana L. F. Ribas, UFPR; Marguerite Quoirin, UFPR.	
Título: 	In vitro multiplication of Swietenia macrophylla King (Meliaceae) from juvenile shoots.	
Ano de publicação: 	2007	
Fonte/Imprenta: 	Ciência Florestal, Santa Maria, v. 17, n. 1/2, p. 109-117, jan./mar. 2007.	
Idioma: 	Inglês	
Conteúdo: 	Big-leaf mahogany (Swietenia macrophylla King) is an important species for timber production that is considered the most valuable in the world. For this reason its exploitation is indiscriminate and leads this species to the risk of extinction. Moreover, mahogany is difficult to regenerate naturally and, when used in reforestation programs, plants are severely damaged by the shoot-borer (Hypsipyla grandella Zellar). This work aimed at developing the multiplication stage of micropropagation of Swietenia macrophylla King using juvenile material. After desinfestation, seeds were germinated in MS solid culture medium. Shoot formation from seeds occurred during five months, giving 5.54 nodal segments per seed. These explants were excised, each containing one axillary bud, and transferred on multiplication media. Four experiments with cytokinins were conducted, using media supplemented with 6-benzylaminopurine (BAP) (2.5 to 50.0 ?M), 2- isopentenyladenine (2-iP) (0; 1.1 to 8.8 ?M), combinations of BAP (0; 2.5 to 50.0 ?M) and 2-iP (2.2 ?M). For the first treatments the basal culture medium was MS medium and in the last one MS and QL media were used in separate experiments. When BAP was tested alone, the maximum point of multiplication rate average was obtained on medium containing 23.61 ?M, while 2-iP did not induce bud multiplication. On QL culture medium supplemented with the combinations of BAP (0; 2.5; 5.0; 10.0 e 20.0 ?M ) and 2-iP (2.2 ?M), there was no multiplication. The maximum point of multiplication rate average was 5.7 ?M, obtained when the MS culture medium was supplemented with 18.51 ?M BAP and 2.2 ?M 2-iP.	
Palavras-Chave: 	Mahogany; Tropical species.	
Thesaurus Nal: 	cytokinins; micropropagation.	
Categoria do assunto: 	--	
URL: 	http://ainfo.cnptia.embrapa.br/digital/bitstream/item/30419/1/MULTIPLICACAO-IN-VITRO-DE-Swietenia-macrophylla-KING-MELIACEAE-A-PARTIR-DE.pdf	
Registro original: 	Embrapa Florestas (CNPF)	
Exemplares: 	CNPF - (41556-1) - UPC - AP - DD -  -  -  - DIS