Effect of chitosan on three isolates of Rhizopus stolonifer obtained from peach, papaya and tomato
Por:
Hernández-Lauzardo A.N., Velázquez-Del Valle M.G., Veranza-Castelán L., Melo-Giorgana G.E., Guerra-Sánchez M.G.
Publicada:
1 jul 2010
Resumen:
Introduction. Rhizopus stolonifer is the causal agent of Rhizopus rot disease in various fruit and vegetables. Materials and methods. The effect of chitosan was evaluated in vitro on mycelial growth, sporulation, morphological characteristics and germination of spores of three isolates of R. stolonifer (from peach, papaya and tomato). The effect of chitosan on controlling Rhizopus decay in peach, papaya and tomato fruit in situ in comparison with the synthetic fungicide dichloran was also studied. Results and discussion. Our results showed that the mycelial growth and sporulation of the three isolates were markedly inhibited at all tested chitosan concentrations. The highest antifungal indexes and sporulation reduction were observed with chitosan at 2 mg.mL(-1). In our study, the morphological characteristics of the spores of R. stolonifer showed different behavior depending on the evaluated isolates. In general, the highest effect on germination was observed at the chitosan concentrat
Filiaciones:
Hernández-Lauzardo A.N.:
CEPROBI, Inst. Politéc. Nac., CP 62731, Apartado Postal 24, Yautepec, Morelos, Mexico
Velázquez-Del Valle M.G.:
CEPROBI, Inst. Politéc. Nac., CP 62731, Apartado Postal 24, Yautepec, Morelos, Mexico
Veranza-Castelán L.:
Fac. Cienc. Quím., Univ. Autón. Veracruz, Prolong. Oriente 6 No. 1009, Orizaba, Veracruz, México, CP 23456, Mexico
Melo-Giorgana G.E.:
Fac. Cienc. Quím., Univ. Autón. Veracruz, Prolong. Oriente 6 No. 1009, Orizaba, Veracruz, México, CP 23456, Mexico
Guerra-Sánchez M.G.:
ENCB, Inst. Politéc. Nac., Carpio y Plan de Ayala S/N, Col Casco de Sto., Tomás. Del. Miguel Hidalgo, CP 11340, Mexico
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