Expression of Specific Class I Chitinase mRNA Levels in Different Grape Varieties and Their Antimicrobial Activity

The aim of this study was to compare the natural variability of the expression of class I chitinase gene in grapes ofVitis viniferaL. varieties as well as investigate their antimicrobial activity. Further, the effect of antimicrobial activity in chitinase expression was analyzed. Matured berries of thirteen grape varieties were used in the study-Alibernet, Dornfelder, Cabernet Sauvignon, Blaufrankisch, Sauvignon Blanc, Welschriesling, Weisser Riesling, Irsai Oliver, Pinot Blanc, Palava, Muller-Thurgau, Gruner Veltliner, and Feteasca Regala, grown in the Small Carpathians wine region of Slovakia, Vrbove. Chitinase I gene expression was found to be similar in most of the analyzed varieties with the except of two varieties, where the expression of chitinase I was significantly higher-Pinot Blanc and Savignon Blanc. By comparing the varieties between the lowest and highest expression fold change, they were statistically different in the level of its chitinase I gene expression. Grape pomace extracts of analyzedVitis viniferaL. were effective against Gram-positive, Gram-negative bacteria and yeasts, but a weak correlation tendency was found between chitinase I gene expression and antimicrobial activity, only againstStaphylococcus aureussubsp.aureus,Candida albicans, andCandida glabrata.