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In conclusion, these results show that treatment of fresh apples with C. saitoana induced systemic resistance against B. cinerea that appeared to be correlated with a systemic increase in chitinase and -1,3-glucanase activity. The observed fruit-mediated resistance induced by the microbial antagonist shows that the activation of defense mechanisms in harvested crops is feasible and has potential in reducing postharvest diseases. Considering that antagonistic yeasts are effective only when introduced into injury before or within a few hours of inoculation with the pathogen (7), the expression of disease resistance, 48 to 72 h after yeast treatment, may not have a decisive role in local protection. This does not preclude a supporting role for induced resistance in combination with the antagonistic activity of the yeast¡£ ÄÄλ¸ßÈ˸ø·Ò»Ï¡£Ð»À² |
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