36E-42 |
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A. VÁZQUEZ-LUNA, Instituto de Ciencias Básicas, Univ. Veracruzana, Apdo. Postal 575, Xalapa, 91000, Mexico, L. Pérez-Flores, Dept. de Biología Experimental, Univ. Autonoma Metrolitana-Iztapalapa, Av. Michoacan y La Purisima, México, Mexico, and R. Díaz-Sobac, Instituto de Ciencias Básicas/Facultad de Química Farmacéutica Biológica, Univ. Veracruzana, Apdo. Postal 575, Xalapa, Mexico. The fruit fly (Anastrepha) and other insects are extensively distributed in the cultivations and have great economic importance by the damage they cause. Recently the interest by the application of biodegradable insecticides has been increased that increase the eating security. In the plum (Prunus domesticates L.) these composed volatiles could be a natural way act as chemical system of defence against herbivorous insects. In the immature state also contains flavonoids, which they would be able to contribute to an activity insecticide. The aim of this study was to identify the presence of volatiles and flavonoids in pre and postharvest condition of plum and the possible activity insecticide that these they can have. Plums with three degrees of maturity were utilized. The presence of volatiles in skin was analyzed by CG-mass using the method of head space. For the identification of flavonoids extractions were carried out with solvent of different polarity. The extracts were analyzed by HPLC to determine presence of flavonoids using a column C18, acetonitrile-fluoroacetic acid 0.1% in water, with a gradient 70:30, 0.5 and flow velocity mL/min to 365 nm. The aldehydes hexanal (5.20 min) and hexenal (6.13 min) were identifying. Hexanal was a greater concentration. It was observed that the concentration of these composed diminished comply the mature fruit. Hexanal has been reported as a natural insecticide whose effectiveness is a superior at propanal. Hexenal probably was generated at the fruit cuts. Seven polyphenolic compounds of interest were identified by means of HPLC, The majority was quercetine, later its derived, followed by miricetine, kaempeferol, and luteolina. Quercetine would be able to contribute to the development of an effect bioinsecticide.
Session 36E, Fruit & Vegetable Products: General
2005 IFT Annual Meeting, July 15-20 - New Orleans, Louisiana |