Estudo fitoquímico e avaliação alelopática de Memora peregrina - "ciganinha" - Bignoniaceae, uma espécie invasora de pastagens em Mato Grosso do Sul Phytochemical study and evaluation of allelopathy in Memora peregrina, 'ciganinha', Bignoniaceae, an invading species in pastures in Mato Grosso do Sul, Brazil

• Main Authors: Rafaela Ferreira Grassi, Ubirazilda Maria Resende, Walciane da Silva, Maria Ligia Rodrigues Macedo, Ana Paola Butera, Elayne de Oliveira Tulli, Francis Paes Saffran, João Máximo de Siqueira
• Format: Article
• Language: English
• Published: Sociedade Brasileira de Química 2005-03-01
• Series: Química Nova
• Subjects: Memora peregrina; Bignoniaceae; invading plants
• Online Access: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422005000200006
• ISSN: 0100-4042; 1678-7064

<abstract language="eng">Memora peregrina (local name: 'ciganinha' - Bignoniaceae) is a weed that often invades pastures in the Brazilian state of Mato Grosso do Sul. From its leaves and subterranean parts, the following compounds were isolated: allantoin (20.7 w/w in subterranean parts), the iridoid 6beta-hydroxyipolamiide, hyperin, 3'-O-methylhyperin, 4-hydroxy-N-methylproline, beta-sitosterol, alpha-amirin and beta-amirin, and lupeol. Allantoin exhibited an activity of inducing germination in seeds of Lactuca sativa used as a biological model, and the iridoid showed moderate activity in the larval development of Anagasta kuehniella. These results, associated with this plant's behavior, are suggestive of the occurrence of adaptive and competitive strategies in relation to other plant species.