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Antifungal Activity of a Plant Cystatin

July 1999 , Volume 12 , Number  7
Pages  624 - 627

Mónica Pernas , Emilia López-Solanilla , Rosa Sánchez-Monge , Gabriel Salcedo , and Pablo Rodríguez-Palenzuela

Department of Biotechnology, E.T.S. Ingenieros Agrónomos, Universidad Politécnica de Madrid, Ciudad Universitaria, 28040 Madrid, Spain

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Accepted 23 March 1999.

Purified chestnut cystatin inhibited the growth of the phytopathogenic fungi Botrytis cinerea, Colletotrichum graminicola, and Septoria nodorum, but not that of the saprophyte Trichoderma viride. Furthermore, the cystatin strongly affected the protease activity of B. cinerea but had no effect on the protease activity of T. viride. These results suggest that chestnut cystatin contributes to plant defense against phytopathogenic fungi.

© 1999 The American Phytopathological Society