Odontadenia lutea (Apocynaceae) leaves: Phytochemical study and insecticidal activity against leaf-cutting ants atta sexdens rubropilosa forel

• Autor(a) principal: da Silva Junior, Weber M.
• Data de Publicação: 2021
• Outros Autores: Santos, Renato G., Duarte, Geane K.G.F., Cunha, Gracielle O.S., da Silva, Daniela M., Marchesin, Thais F.R. [UNESP], Bueno, Odair C. [UNESP], Menezes, Antônio Carlos S.
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://dx.doi.org/10.21577/0100-4042.20170641; http://hdl.handle.net/11449/229019
• topic: Apocynaceae; Cutting ants; Monogalactosylmonoacylglycerol; Odontadenia lutea; Triterpenes

The present work describes the chemical constituents of Odontadenia lutea (Vell.) Markgr. leaves and the toxicities of its extract and fractions against Atta sexdens rubropilosa Forel (Hymenoptera: Formicidae). Chromatographic procedures of the ethanolic extract resulted in the identification of the triterpene β-amyrin, the flavonoid rutin, two fatty acids palmitic and linolenic, and one glyceroglycolipid 3-O-(9,12,15-octadecatrienoyl)-glyceryl-β-D-galactopyranoside, which are known compounds, but they are described for the first time in the Odontadenia genus. The known triterpenes lupeol and α-amyrin were also identified. Structural identification of the compounds was performed by analysis of IR, ESI-MS, and 1D and 2D NMR spectra. The toxicity of its extract and fractions from O. lutea leaves was tested against leaf-cutting ants Atta sexdens rubropilosa Forel by employing ingestion bioassay procedures. The hexane fraction (2 mg mL-1) decreases the average survival of ants from sixteen to six days, causing 98% mortality on the 14th day and 100% at the end of the experiment.