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Sesquiterpenos do caule de Pilocarpus riedelianus e atividades sobre microorgan...
Guerreiro,Gisleine; Lima,Janete Eliza S. de; Fernandes,João Batista; Silva,M. Fátima das G. F. da; Vieira,Paulo Cezar; Magalhães,Claudia Maria I.Pilocarpus riedelianus was studied in order to obtain compounds with activity against fungi and bacteria. The dichloromethane extract, the most active one, was chromatographed yielding hexane and dichloromethane fractions. Six known sesquiterpenes, alpha-calacorene, beta-calacorene, gamma-calacorene, cadalene, sesquichamaenol and 1-hydroxy-1,3,5-bisabolatrien-10-one were identified in the hexane fractions. The ...
Inhibition of the symbiotic fungus of leaf-cutting ants by coumarins
Godoy,Marizete F. P.; Victor,Sandra R.; Bellini,Adriana M.; Guerreiro,Gisleine; Rocha,Waldireny C.; Bueno,Odair C.; Hebling,Maria J. A.Leaf-cutting ants are known to be a serious pest for agriculture due to the high amounts of vegetal matter from crops used by them in order to cultivate a symbiotic fungus on which they rely for food and enzymes. The mutualism between the fungus and the ants is a point to be explored when alternative methods of control are being thought of. Considering that some plants are naturally resistant to phytophagous in...