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Molibdênio na qualidade de cachos de videiras 'BRS Vitória' e 'Niagara Rosada'

Authors: Camizotti, Karina Assis;

Molibdênio na qualidade de cachos de videiras 'BRS Vitória' e 'Niagara Rosada'

Abstract

Existe forte relação entre a aparência e aceitação dos cachos de uva pelo mercado consumidor, no qual há preferência por cachos grande, descompactados, com bagas grandes e coloração intensa. Dentro do setor vitícola, são realizadas diversas técnicas de manejo para aumentar não só tamanho dos cachos de uva, mas também suas características organolépticas e nutricionais. A pulverização de reguladores vegetais nos cachos de uva, são estratégias utilizadas durante décadas na viticultura, com a finalidade de descompactação e melhoria na qualidade dos frutos. No entanto, é uma prática com elevado custo devido ao valor dos produtos, havendo necessidade de validar produtos alternativos que vise a descompactação dos cachos com custo menor, sendo uma alternativa interessante o molibdênio. Dessa forma, esse estudo investigou o efeito na descompactação e melhoria da qualidade de cachos de videiras ‘BRS Vitória’ e ‘Niagara Rosada’, pela pulverização de doses de doses de molibdênio associadas a uma dose padrão de 30 mg.L-1 de GA3. O estudo foi conduzido durante os ciclos produtivos de 2020/2021 e 2021/2022, utilizando as doses de 0, 8, 16, 24 e 32 mg.L-1 de molibdênio pulverizadas em bagas de 6 a 8 mm de diâmetro. Os parâmetros avaliados foram: massa fresca de cachos, de bagas e de engaços; comprimento e largura de cachos, de bagas e de engaços; número de bagas por cacho; pH; teor de sólidos solúveis; acidez titulável; índice de maturação; teor de polifenóis, flavonoides e antocianinas; determinação da atividade antioxidante. As cultivares apresentaram resposta diferentes em relação aos produtos utilizados. Na primeira safra a ‘BRS Vitória’ apresentou respostas positivas na dose de 16 mg.L-1 de molibdênio com aumento na massa fresca de engaço e nos parâmetros físicas das bagas, o teor de antocianinas e atividade antioxidante tiveram melhores respostas com a dose de 32mg.L-1, enquanto que no segundo ciclo não houve resposta significativa entre os tratamentos. Para a cultivar Niagara Rosada a aplicação de 24 mg.L-1 de molibdênio foi a mais responsiva na descompactação dos cachos, enquanto o conteúdo de compostos fenólicos e atividade antioxidante obtiveram melhores respostas na dose de 7,83 mg.L-1.

There is a strong relationship between the appearance and acceptance of grape bunches by the consumer market, in which there is a preference for large, uncompacted bunches, with large berries and intense coloring. Within the wine sector, several management techniques are carried out to increase not only the size of the grape bunches, but also their organoleptic and nutritional characteristics. The spraying of plant regulators on grape bunches are strategies used for decades in viticulture, with the purpose of unpacking and improving fruit quality. However, it is a practice with a high cost due to the value of the products, and there is a need to validate alternative products that aim to unpack the bunches at a lower cost, with molybdenum being an interesting alternative. Thus, this study investigated the effect on decompaction and improvement of bunch quality of 'BRS Vitória' and 'Niagara Rosada' vines, by spraying doses of molybdenum doses associated with a standard dose of 30 mg.L-1 of GA3 . The study was conducted during the production season of 2020/2021 and 2021/2022, using doses of 0, 8, 16, 24 and 32 mg.L-1 of molybdenum sprayed on berries of 6 to 8 mm in diameter. The parameters evaluated were: fresh mass of bunches, berries and stalks; length and width of bunches, berries and stalks; number of berries per bunch; pH; soluble solids content; titratable acidity; maturation index; content of polyphenols, flavonoids and anthocyanins; determination of antioxidant activity. The cultivars showed different responses in relation to the products used. In the first harvest, 'BRS Vitória' showed positive responses at the dose of 16 mg.L-1 of molybdenum with an increase in the fresh mass of stalk and in the physical parameters of the berries, the anthocyanin content and antioxidant activity had better responses with the dose of 32mg.L-1, while in the second season there was no significant response between treatments. For the cultivar Niagara Rosada, the application of 24 mg.L-1 of molybdenum was the most responsive in unpacking the bunches, while the content of phenolic compounds and antioxidant activity obtained better responses at the dose of 7.83 mg.L-1.

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Pós-graduação em Agronomia (Horticultura) - FCA

2020/12152-3

001

Country
Brazil
Keywords

Molybdenum, Atividade antioxidante, Compostos fenólicos, Phenolic compound, Vitis labrusca L., Vitis labrusca L, Micronutriente, Descompaction grape bunches, Uva sem semente, Antioxidant activity, Descompactação de cachos, Micronutrient, Seedless grape

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
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