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- Title
Potencial alelopático de Tropaeolum majus L. na germinação e crescimento inicial de plântulas de picão-preto.
- Authors
Formagio, Anelise Samara Nazari; Masetto, Tathiana Elisa; Vieira, Maria do Carmo; Zárate, Néstor Antonio Heredia; da Costa, Willian Ferreira; Trevizan, Lucas Noboru Fatori; Sarragiotto, Maria Helena
- Abstract
This research aimed to evaluate the metanolic extracts allelopathic potential from leaves, flowers and roots of capuchinha (Tropaeolum majus L.) on picão-preto seeds germination and initial seedling growth. The best inhibitor metanolic extract was fractioned, in hexanic, cloroformic, etil acetate and hidrometanolic fractions and it was characterized through absorption spectrum using mid-infrared. To evaluate the allelopathic effect of metanolic extracts and the fractions aftereffect; it was used picão-preto seeds distributed on 2ml extracts moistured paper maintained in B.O.D. germinator at 25°C and white constant light. Seeds sowed directly in water moistured germitest paper constituted the control. The allelopathic potential extracts were evaluated through the first count, final germination percentage, seedlings primary root and hypocotyl length (cm). The experiment was carried out DIC with three replications of 25 seeds. The capuchinha leaves showed allelopathic potential on picão-preto seeds germination, hypocotyl and seedlings primary root length. It was suggested that such effects are associated to the presence of polar chemical groups because the increase in the solvents polarity detected the major picão-preto germination and seedlings growth inhibition effect.
- Subjects
TROPAEOLUM majus; GERMINATION; ALLELOPATHIC agents; MEDICINAL plants; RESPONSE inhibition; ABSORPTION spectra; HYPOCOTYLS
- Publication
Ciência Rural, 2012, Vol 42, Issue 1, p83
- ISSN
0103-8478
- Publication type
Article
- DOI
10.1590/S0103-84782011005000148