| Popis: |
Melon plants locally infected with Colletotrichum lagenarium display a marked increase in chitinase activities (exo- and endo-activities) throughout the whole plant. This increase begins 3 days after inoculation in the inoculated cotyledon, and then occurs sequentially in the non-infected tissues. Both fungal elicitors and plant endogenous elicitors induce a rapid increase in chitinase activity in the treated cotyledon. In other organs, chitinase activity is stimulated, to a lesser extent and after a lag period, only by fungal elicitors. The earlier, more rapid, systemic induction of chitinase activity, produced by treatment with the fungal elicitor is correlated by the increased resistance of the tissues to infection by the pathogen. |
