INQUINOA   21218
INSTITUTO DE QUIMICA DEL NOROESTE
Unidad Ejecutora - UE
artículos
Título:
Antifungal activity of extracts of extremophile plants from the Argentine Puna to
Autor/es:
SAYAGO, JORGE E.; ORDÓÑEZ, ROXANA MABEL; NEGRILLO, LUCAS; TORRES, SEBASTIÁN; ISLA, MARÍA INÉS
Revista:
POSTHARVEST BIOLOGY AND TECHNOLOGY
Editorial:
ELSEVIER SCIENCE BV
Referencias:
Lugar: New York; Año: 2012 vol. 67 p. 19 - 24
ISSN:
0925-5214
Resumen:
A main constraint on the citrus industry is the management of postharvest diseases, mostly of fungal
origin. The fungicides used to control these diseases: (1) leave persistent residues that raise some
dietary concerns; (2) cannot be used on fruit produced under ?organic? rules; and, (3) have experienced
resistance to them become widespread within citrus packinghouses. Consequently, the development
of management strategies to supplement or replace the use of synthetic fungicides by the utilization
of microorganisms or natural bioactive products is desirable. The aim of this work was to screen
extremophile plants from the Argentine Puna in order to select species with antifungal activity against
Penicillium digitatum and Geotrichum citri-aurantii, two very important fungal species causing citrus
postharvest disease. Plant aqueous extracts obtained from Chuquiraga atacamensis, Parastrephia phyliciformisand Geotrichum citri-aurantii, two very important fungal species causing citrus
postharvest disease. Plant aqueous extracts obtained from Chuquiraga atacamensis, Parastrephia phyliciformisChuquiraga atacamensis, Parastrephia phyliciformis
and Parastrephia lepidophylla, were able to inhibit in vitro P. digitatum growth, while P. lepidophyllaParastrephia lepidophylla, were able to inhibit in vitro P. digitatum growth, while P. lepidophylla
extract was active against G. citri-aurantii cultures. P. lepidophylla aqueous formulations showed MIC100G. citri-aurantii cultures. P. lepidophylla aqueous formulations showed MIC100
values of 300 mg/L against both P. digitatum and G. citri-aurantii strains. MFC values of P. lepidophyllaP. digitatum and G. citri-aurantii strains. MFC values of P. lepidophylla
extracts were similar to MIC100 values. In vivo tests showed that the P. lepidophylla aqueous formulations
(600 mg/L) exert curative and protective effects on the fruit against infection by a P. digitatum wild strain.100 values. In vivo tests showed that the P. lepidophylla aqueous formulations
(600 mg/L) exert curative and protective effects on the fruit against infection by a P. digitatum wild strain.P. digitatum wild strain.