Phenylalanine and urea foliar application: effect on grape and must microbiota

The main aim of this study was to describe the impact of foliar phenylalanine and urea application on grape and must microbial populations. Thus, 75 microbial species of yeasts and of lactic acid, acetic acid and environmental bacteria, were found in the study. The microbial diversity of grape after both foliar nitrogen treatments did not show significant changes in comparison to the control samples, but were modified in some indices in must samples. In fact, urea application caused significant changes in microbial diversity and population structure in comparison to the control must.

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