Effect of artificial inoculation of Mycosphaerella fijiensis on the induction of defence-related enzymes in two Musa genotypes
Journal Title: Biotecnología Vegetal - Year 2009, Vol 9, Issue 3
Abstract
Black Sigatoka, caused by Mycosphaerella fijiensis Morelet (anamorph: Pseudocercospora fijiensis (Morelet) Deighton), is regarded as the most economically important foliar disease of bananas and plantains worldwide. Although exists numerous studies about plant-pathogen interaction in many pathosystems it is very limited the knowledge of the molecular mechanisms in Musa–M. fijiensis compatible or incompatible interaction. For this reason, the objective of the present study was to evaluate the effect of artificial inoculation of Mycosphaerella fijiensis on the induction of some defence-related enzymes in two Musa genotypes, under greenhouse conditions. Enzymatic activities of peroxidase (PO), phenylalanine ammonia-lyase (PAL) and -1, 3-glucanase were determined at different times post infection. An increase in enzymatic activities were observed in ‘Calcutta 4’ inoculated plants and similar results were obtained in ‘Grande naine’ inoculated plants, except in -1, 3-glucanase activity in which no differences between inoculated and non-inoculated plants were observed. The biochemical changes in ‘Calcutta 4’ plants in response to M. fijiensis infection were observed early than in ‘Grande naine’ and seem to offer new evidences of collective mechanisms of plant resistance to the invasion of the pathogen.
Authors and Affiliations
Cynthia Sánchez-García , Yelenys Alvarado-Capó, Mayra Acosta-Suárez, Mileidy Cruz-Martín, Michel Leiva-Mora, Berkys Roque
Keywords
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