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A Protein from the Mold Aspergillus giganteus Is a Potent Inhibitor of Fungal Plant Pathogens

November 2001 , Volume 14 , Number  11
Pages  1,327 - 1,331

L. Vila , 1 V. Lacadena , 2 P. Fontanet , 1 A. Martinez del Pozo , 2 and B. San Segundo 1

1Departamento de Genética Molecular, Instituto de Biología Molecular de Barcelona, CID-CSIC, Jordi Girona 18, 08034 Barcelona, Spain; 2Departamento de Bioquímica y Biología Molecular, Facultad de Química, Universidad Complutense, 28040 Madrid, Spain

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Accepted 18 July 2001.

A purified preparation of antifungal protein (AFP) from Aspergillus giganteus exhibited potent antifungal activity against the phytopathogenic fungi Magnaporthe grisea and Fusarium moniliforme, as well as the oomycete pathogen Phytophthora infestans. Under conditions of total inhibition of fungal growth, no toxicity of AFP toward rice protoplasts was observed. Additionally, application of AFP on rice plants completely inhibited M. grisea growth. These results are discussed in relation to the potential of the afp gene to enhance crop protection against fungal pathogens in transgenic plants.

Additional keywords: Oryza sativa , Pyricularia grisea .

© 2001 The American Phytopathological Society