Chemistry of apple and pear stigma exudates related to bacterial antagonism toward Erwinia amylovora

摘要

In the present study, stigma exudates from apple and pear were chemically analyzed, and results wereused in developing a synthetic medium for studying interactions between Erwinia amylovora andmicrobial antagonists. The simulation was tested by comparing pathogen-antagonist interactions in thestigma-based medium (SBM) with those occurring in assays involving detached crab apple flowers. Theimportance of nutrient components in SBM was evaluated by examining interactions in altered forms ofthis medium. Finally, acid production by bacteria was investigated as a mode of antagonism towardE. amylovora in SBM and stigma exudates.