Inhibition of growth and aflatoxin production of Aspergillus parasiticus by guaran (Paullinia cupana Kunth) and juc (Libidibia ferrea Mart) extracts

Abstract

In the present study, fruits exts. (Paullinia cupana K. & Libidibia ferrea M. - guaran´a & juc´a, resp.) of the Amazon Region were tested for antifungal and antimycotoxigenic activities against Aspergillus parasiticus using the agar diln. method. The treatments utilized were at three different concns. (1.08, 1.62 and 3.24%). The effect on both exts. on growth diam. of fungal colony was time and concn. dependent. No treatment completely inhibited fungi growth, however A. parasiticus was significantly reduced by the treatments when compared to the control group. The prodn. of AFB1, AFB2, AFG1 and AFG2 by A. parasiticus grown on guaran´a and juc´a exts. treatment was significantly smaller when compared to controls. A. parasiticus strain produced aflatoxins in all concns. when grown on guaran´a exts. medium treated and different of that obsd. when on juc´a's treated exts. [on SciFinder(R)]