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Research Note

Identification and Frequencies of Endophytic Microbes within Healthy Grape Berries

Megan E. Hall, Wayne F. Wilcox
Am J Enol Vitic. April 2019 70: 212-219; published ahead of print December 21, 2018 ; DOI: 10.5344/ajev.2018.18033
Megan E. Hall
1Section of Plant Pathology and Plant-Microbe Biology, School of Integrative Plant Science, Cornell University, NYS Agricultural Experiment Station, Geneva NY 14456
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  • For correspondence: hallmegan@missouri.edu
Wayne F. Wilcox
1Section of Plant Pathology and Plant-Microbe Biology, School of Integrative Plant Science, Cornell University, NYS Agricultural Experiment Station, Geneva NY 14456
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Abstract

Intact, healthy grape berries were sampled from vineyards in the states of Washington and New York; in Tasmania, Australia; and from bunches of table grapes exported from Chile that were purchased on two occasions in a United States supermarket. Endophytic microbes were isolated on media conducive to fungi or bacteria and subsequently identified by Illumina sequencing of their DNA. Species of the yeast genera Metschnikowia, Pichia, and Hanseniaspora were recovered from every set of samples, as were species of the bacterial genera Acinetobacter, Burkholderia, Bacillus, Acetobacter, and Gluconobacter. Multiple other fungal and bacterial species were recovered less often. When quantified for the Washington samples and one set from the supermarket, non-Saccharomyces yeast species represented the vast majority of fungal identifications, while the distribution of various bacterial species varied widely between and within the two sources. The endophytic presence of these microbes within grape berries has implications with respect not only to the potential development of sour rot, but also to the broader concept of microbial terroir in wine quality.

  • bacterial endophytes
  • microbial populations
  • yeast ecology
  • Received March 2018.
  • Revision received August 2018.
  • Revision received October 2018.
  • Accepted October 2018.
  • ©2019 by the American Society for Enology and Viticulture
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Identification and Frequencies of Endophytic Microbes within Healthy Grape Berries
Megan E. Hall, Wayne F. Wilcox
Am J Enol Vitic.  April 2019  70: 212-219;  published ahead of print December 21, 2018 ; DOI: 10.5344/ajev.2018.18033

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Identification and Frequencies of Endophytic Microbes within Healthy Grape Berries
Megan E. Hall, Wayne F. Wilcox
Am J Enol Vitic.  April 2019  70: 212-219;  published ahead of print December 21, 2018 ; DOI: 10.5344/ajev.2018.18033
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