Impact of mechanical harvesting and optical berry sorting on grape and wine composition

David A. Hendrickson, Larry A. Lerno, Anna K. Hjelmeland, Susan E. Ebeler, Hildegarde Heymann, Helene Hopfer, Karen L. Block, Charles A. Brenneman, Anita Oberholster

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The impact of mechanical harvesting, optical berry sorting, and their possible synergistic effect on grape and wine composition was investigated. Pinot noir grapes from the Russian River Valley American Viticultural Area were harvested by hand, by a standard bow-rod mechanical harvester, or by a mechanical harvester with a Selectiv’ Process on-board. For each harvest method, half of the grapes were unsorted and half were optically sorted at the winery. The grapes, wines at bottling, and wines after three months of bottle aging were analyzed by reversed-phase high-performance liquid chromatography (RP-HPLC), ultraviolet-visible spectroscopy (UV-vis), and headspace solid-phase microextraction (HS-SPME) gas chromatography mass spectrometry (GC-MS) for color expression and phenolic and aroma profiling. The machine-harvested grapes had higher levels of β-damascenone, linalool, β-myrcene, and α-terpinene, potentially caused by glycosidic hydrolysis triggered by berry damage during harvest or from induced synthesis as a wounding response. In general, differences in wine composition attributable to harvest method were diminished or eliminated by optical sorting. The machine harvester with the Selectiv’ Process on-board led to wines with the most phenolics, although these differences may have been decreased or eliminated had the grapes been crushed before fermentation as the wines were produced by whole-berry fermentation. Descriptive sensory analysis conducted on wines three months after bottling determined that the wines made from hand-harvested fruit had significantly greater tropical fruit aroma, while wines made from optically sorted treatments had less hue saturation. With only two significant differences among the 18 aroma, taste, and mouthfeel attributes tested, it was concluded that all treatments led to wines of similar character.

Original languageEnglish (US)
Pages (from-to)385-397
Number of pages13
JournalAmerican Journal of Enology and Viticulture
Volume67
Issue number4
DOIs
StatePublished - Oct 1 2016

Fingerprint

mechanical harvesting
Vitis
Wine
sorting
small fruits
wines
grapes
Fruit
harvesters
bottling
odors
Fermentation
hands
fermentation
Hand
ultraviolet-visible spectroscopy
mouthfeel
wine grapes
tropical and subtropical fruits
myrcene

All Science Journal Classification (ASJC) codes

  • Food Science
  • Horticulture

Cite this

Hendrickson, D. A., Lerno, L. A., Hjelmeland, A. K., Ebeler, S. E., Heymann, H., Hopfer, H., ... Oberholster, A. (2016). Impact of mechanical harvesting and optical berry sorting on grape and wine composition. American Journal of Enology and Viticulture, 67(4), 385-397. https://doi.org/10.5344/ajev.2016.14132
Hendrickson, David A. ; Lerno, Larry A. ; Hjelmeland, Anna K. ; Ebeler, Susan E. ; Heymann, Hildegarde ; Hopfer, Helene ; Block, Karen L. ; Brenneman, Charles A. ; Oberholster, Anita. / Impact of mechanical harvesting and optical berry sorting on grape and wine composition. In: American Journal of Enology and Viticulture. 2016 ; Vol. 67, No. 4. pp. 385-397.
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Hendrickson, DA, Lerno, LA, Hjelmeland, AK, Ebeler, SE, Heymann, H, Hopfer, H, Block, KL, Brenneman, CA & Oberholster, A 2016, 'Impact of mechanical harvesting and optical berry sorting on grape and wine composition', American Journal of Enology and Viticulture, vol. 67, no. 4, pp. 385-397. https://doi.org/10.5344/ajev.2016.14132

Impact of mechanical harvesting and optical berry sorting on grape and wine composition. / Hendrickson, David A.; Lerno, Larry A.; Hjelmeland, Anna K.; Ebeler, Susan E.; Heymann, Hildegarde; Hopfer, Helene; Block, Karen L.; Brenneman, Charles A.; Oberholster, Anita.

In: American Journal of Enology and Viticulture, Vol. 67, No. 4, 01.10.2016, p. 385-397.

Research output: Contribution to journalArticle

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