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Kellner N, Antal E, Szabó A, Matolcsi R. The effect of black rot on grape berry composition. AAlim 2022. [DOI: 10.1556/066.2021.00195] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Abstract
Guignardia bidwellii, indigenous to North America, is a significant pathogen of grapes long known in Hungary, infecting only the growing green parts of the vine (leaves, petioles, shoots, and bunches). In the absence of adequate plant protection and extreme weather conditions such as a predominantly humid, warm year, black rot of grapes can be expected. The pathogen can cause high yield losses due to grape rot and reduce wine quality if the infection is severe.
The evolution of certain biogenic amine compounds were investigated under the influence of grape black rot. The results obtained showed that they were present in low concentrations from an oenological point of view. Polyphenol composition was consistent with the literature, blackening affected mainly the concentration of catechin. Black rot fungus does not produce β-glucosidase enzyme. In terms of resveratrol content, black rot has no particular effect. However, like Botrytis cinerea, it produces glycerol and, proportionally, gluconic acid in lower concentrations.
It can be concluded that black rot of grapes does not cause health problems when introduced into wine processing.
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Affiliation(s)
- N. Kellner
- Institute of Viticulture and Oenology, Hungarian University of Agriculture and Life Sciences, H-1118, Budapest, Ménesi út 45, Hungary
| | - E. Antal
- Diagnosticum Zrt, H-1047, Budapest, Attila út 126, Hungary
| | - A. Szabó
- Institute of Horticultural Science, Hungarian University of Agriculture and Life Sciences, H-1118, Budapest, Villányi út 29–43, Hungary
| | - R. Matolcsi
- Institute of Viticulture and Oenology, Hungarian University of Agriculture and Life Sciences, H-1118, Budapest, Ménesi út 45, Hungary
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