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

  1. González-Arenzana, L. 1
  2. Portu, J. 1
  3. López, R. 1
  4. Garijo, P. 1
  5. Garde-Cerdán, T. 1
  6. López-Alfaro, I. 1
  1. 1 Instituto de Ciencias de la Vid y del Vino
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    Instituto de Ciencias de la Vid y del Vino

    Logroño, España

    ROR https://ror.org/01rm2sw78

Revista:
International Journal of Food Microbiology

ISSN: 0168-1605

Año de publicación: 2017

Volumen: 245

Páginas: 88-97

Tipo: Artículo

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DOI: 10.1016/J.IJFOODMICRO.2017.01.017 SCOPUS: 2-s2.0-85010987090 WoS: WOS:000395599700012 GOOGLE SCHOLAR

Otras publicaciones en: International Journal of Food Microbiology

Repositorio institucional: lockAcceso abierto Editor

Resumen

The main aim of this study was to describe the impact of foliar phenylalanine and urea application on grape and must microbial populations. The tool used to perform the ecological study was DGGE conducted with several infusions in non-enriched and enriched liquid media, as well as direct DNA extractions of grapes and musts. A total of 75 microbial species were found in the study. The alpha diversity indices 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. The phenylalanine must sample was similar to the control, while foliar urea application caused significant changes in microbial diversity and population structure in comparison to the control must. Further research would be necessary to properly predict the impact on winemaking of the effects observed in this study for grape and must microbiota, especially regarding the foliar application of urea. © 2017 Elsevier B.V.