Use este identificador para citar ou linkar para este item: https://locus.ufv.br//handle/123456789/11990
Tipo: Artigo
Título: Phytogrowth-Inhibitory lactones derivatives of Glaucolide B
Autor(es): Barbosa, Luiz Cláudio de Almeida
Costa, Adilson V.
Piló-Veloso, Dorila
Lopes, Joao Luiz C.
Hernandez-Terrones, Manuel G.
King-Diaz, Beatriz
Lotina-Hennsen, Blas
Abstract: The sesquiterpene lactone glaucolide B (1), isolated from Vernonia fruticulosa (Asteraceae), was transformed into six lactones (2-7). The structures of the products were elucidated by spectroscopic analysis. A series of solutions of compounds 1-7, at 200 μᴍ, were tested on the germination and on the root and shoot growth of the dicotyledons Physalis ixocarpa and Trifolium alexandrinum and of the monocotyledons Lolium multiflorum and Amaranthus hypochondriacus. Lactone 5 exhibited clear selectivity towards dicotyledonous species at 200 μᴍ, with an average inhibition of 90% on the germination of P. ixocarpa. Lactones 1, 3 and 4 had a greater effect on root length of monocotyledonous species, inhibiting around 70% at 200 μᴍ in L. multiflorum. It seems that the diol function is required in lactones 4-6 to increase the activity, the polarity in the molecule might be required to reach its target.
Palavras-chave: Sesquiterpene lactones
Germination
Growth inhibition
Herbicidal activity
Editor: De Gruyter
Tipo de Acesso: Open acess
URI: https://doi.org/10.1515/znc-2004-11-1207
http://www.locus.ufv.br/handle/123456789/11990
Data do documento: 2-Jun-2014
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