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Tran TT, Jung J, Garcia L, Deshields J, Cerrato C, Penner MH, Tomasino E, Levin A, Zhao Y. Evaluation of Functional Spray Coatings for Mitigating the Uptake of Volatile Phenols by Pinot Noir Wine Grapes via Blocking, Absorption, and/or Adsorption. J Agric Food Chem 2023; 71:20222-20230. [PMID: 38054467 DOI: 10.1021/acs.jafc.3c05621] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/07/2023]
Abstract
Spray coatings have shown promising potential in preventing the uptake of smoke phenols from wildfires into wine grapes. Three cellulose nanofiber-based coatings with low methoxyl pectin or varying concentrations of chitosan were made into films and their potential for blocking, absorption, or adsorption of phenols (guaiacol, m-cresol, and syringol) was evaluated using a custom-built smoke diffusion box. The coatings were also applied to Pinot noir grapes in a vineyard. GC-MS analysis for smoke phenols from headspace gases of diffusion study and extractions of films indicated that chitosan-based films can block guaiacol and syringol, and all films are able to capture m-cresol. The type of coating and application time in a vineyard did not affect (P < 0.05) physicochemical properties, size, and weight of the berries, whereas chitosan-based coatings resulted in a higher anthocyanin content of berries. This study provided new information about the key mechanisms (i.e., blocking phenols) of coatings to mitigate smoke phenol uptake in wine grapes.
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Affiliation(s)
- Trung T Tran
- Department of Food Science & Technology, Oregon State University, Corvallis, Oregon 97331, United States
| | - Jooyeoun Jung
- Department of Food Science & Technology, Oregon State University, Corvallis, Oregon 97331, United States
| | - Lindsay Garcia
- Department of Food Science & Technology, Oregon State University, Corvallis, Oregon 97331, United States
| | - Joseph Deshields
- Department of Horticulture, Oregon State University, Corvallis, Oregon 97331, United States
- Southern Oregon Research, Oregon State University, 569 Hanley Rd., Central Point, Oregon 97502, United States
| | - Cole Cerrato
- Department of Food Science & Technology, Oregon State University, Corvallis, Oregon 97331, United States
| | - Michael H Penner
- Department of Food Science & Technology, Oregon State University, Corvallis, Oregon 97331, United States
| | - Elizabeth Tomasino
- Department of Food Science & Technology, Oregon State University, Corvallis, Oregon 97331, United States
| | - Alexander Levin
- Department of Horticulture, Oregon State University, Corvallis, Oregon 97331, United States
- Southern Oregon Research, Oregon State University, 569 Hanley Rd., Central Point, Oregon 97502, United States
| | - Yanyun Zhao
- Department of Food Science & Technology, Oregon State University, Corvallis, Oregon 97331, United States
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