Proposal of an index for the objective evaluation of the colour of red table grapes

Carreño, J.; Martı́nez, A.; Almela, L.; Fernández-López, José A.

doi:10.1016/0963-9969(95)00008-a

Cited by 177 publications

(128 citation statements)

References 13 publications

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“…[11,39] Grape CIELAB parameters and the calculated colorimetric indexes highlighted moderate differences among the cultivars (Table 4). Nevertheless, the CIRG2 index showed the best potential for evaluating the berry skin color of the five varieties, allowing to distinguish grapes that, based on the color O.I.V code 225 [40] , would be classified in the same group [ 11,29] Skin mechanical properties of the five colored table grapes are reported in Table 5. Many differences were found.…”

Section: Resultsmentioning

confidence: 99%

“…Standard illuminant D 65 was used as reference. Two indexes for each variety were calculated: CIRG = (180-H) / (L*+C), proposed as colorimetric index for the table grapes, and CIRG2 = (180-H) / (L*x C), [29] where H was calculated considering the hue values included between 360° and 270° as negative (e.g. 346° was taken as -14°).…”

Section: Physical and Mechanical Analysismentioning

confidence: 99%

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Varietal Comparison of The Chemical, Physical, and Mechanical Properties of Five Colored Table Grapes

Rolle

Giacosa

Gerbi

et al. 2013

International Journal of Food Properties

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The visual attributes of table grapes, their chemical constituents and mechanical properties are involved in consumer acceptability because they are correlated to sensory perception. Usually, instrumental measurements are preferred to the sensory evaluations because they reduce variations in subjective judgments and can be carried out more easily. In this work chemical-physical attributes and texture properties of five black table grapes (Alphonse Lavallée, Black magic, Cardinal, Perlon, Regina nera) were studied in order to identify significant varietal differences.Spectrophotometric and HPLC methods and Texture Analysis test were used to evaluate color index, sugars and acid composition, phenolic characteristics and mechanical properties of the skin and the pulp of berries. Many differences were found among varieties in technological maturity indexes, hydroxycinnamic acid, anthocyanin content and profile and relative CIE L*, a*, b* parameters, but the more relevant differences were found in mechanical properties. Principal Component Analysis showed that the TPA parameters (hardness, cohesiveness, gumminess, resilience) and berry skin characteristics (break skin energy, skin modulus of elasticy) were the best indices able to fulfill the aim of this work. Almost all the parameters showed differences among cultivars, confirming their importance in the characterization of the variety as well as in the assessment of potential consumer acceptability. In particular, the cultivars demonstrated different reactions to the compression test; thus, the texture analysis parameters can be appropriate to explain varietal differences and to allow their differentiation.

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Section: Resultsmentioning

confidence: 99%

Section: Physical and Mechanical Analysismentioning

confidence: 99%

Varietal Comparison of The Chemical, Physical, and Mechanical Properties of Five Colored Table Grapes

Rolle

Giacosa

Gerbi

et al. 2013

International Journal of Food Properties

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“…Berry color was analyzed using a colorimeter (Konica Minolta ® CR-10, Tokyo, Japan) to obtain the following variables from the equatorial portion of 10 berries per plot: luminosity (L*), chroma (C*) and hue angle (h • ) and, subsequently the color index for red grapes (CIRG) was determined using the formula: CIRG = (180-h • )/(L* + C*) [35].…”

Section: Physicochemical Analysismentioning

confidence: 99%

Cold Storage and Biocontrol Agents to Extend the Storage Period of ‘BRS Isis’ Seedless Table Grapes

et al. 2018

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'BRS Isis' is a novel hybrid seedless table grape with large reddish bunches. This cultivar is cultivated in tropical and subtropical areas and has potential to be exported overseas; however, under these growth conditions, grapes can be severely damaged by gray mold (Botrytis cinerea), the main postharvest disease of table grapes. Thus, this study aimed to evaluate different pre-and postharvest strategies to extend the storage period of 'BRS Isis' seedless table grapes. The treatments consisted of grapes packed into carton boxes under cold storage (1 • C and high relative humidity), pre-and/or postharvest treatment with potassium bicarbonate or a biological control agent (Bacillus subtilis), all with Botrytis inoculation. Additionally, two controls, with and without Botrytis inoculation, were also evaluated. The experimental design was completely randomized with eight treatments and three replications, and each plot consisted of four bunches. After a 50-day cold storage period, the carton boxes were kept for five days at room temperature (22 • C). Gray mold incidence and water loss, as well as soluble solids (SS), pH, titratable acidity (TA), SS/TA ratio, and color attributes were evaluated during both periods. Cold storage effectively reduced gray mold in 'BRS Isis' seedless grape for a period of 50 days, even when grapes were inoculated; however, no difference among treatments was observed. Higher water loss was observed in both non-treated control treatments.

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“…Com base nesses dados, calculou-se o índice específico para bagas de cor vermelha -CIRG (color index for red grapes) -, pela equação: CIRG = 180-hue*/(L*+C). Valores do índice CIRG próximos de zero correspondem a bagas de coloração verde, enquanto valores próximos de cinco, a bagas de coloração vermelha (Carreño et al, 1995).…”

Section: Methodsunclassified

Fisiologia e produção da videira 'Niágara Rosada' nos sistemas de condução em espaldeira e em Y

Sanchez-Rodriguez

Dias

Spósito

2016

Pesq. agropec. bras.

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Resumo -O objetivo deste trabalho foi caracterizar as variáveis fisiológicas e produtivas da videira 'Niágara Rosada' (Vitis labrusca) nos sistemas de condução em espaldeira e em Y, nos dois primeiros anos de produção. Nos ciclos produtivos de 2014 e 2015, avaliaram-se os seguintes parâmetros: índice de área foliar, fotossíntese, transpiração, condutância estomática, área de superfície foliar, variáveis de produção e qualidade do fruto. No primeiro ano de produção, houve diferenças entre os sistemas de condução quanto às variáveis ecofisiológicas influenciadas pela área de superfície foliar dos dosséis. No segundo ano de produção, não houve diferenças entre as variáveis ecofisiológicas. O número de cachos por área de superfície foliar, a massa do cacho, o número de bagas por cacho e a produção por planta não apresentaram diferenças entre os sistemas de condução. Videiras do primeiro e do segundo ano de produção não apresentaram diferenças entre os sistemas de condução, quanto às relações entre área de superfície foliar e produção; porém, a produtividade foi superior no sistema em espaldeira, em função do maior número de plantas por hectare. Frutos produzidos no sistema em Y apresentaram maior quantidade de pigmentos, como antocianinas e flavonóis, do que aqueles no sistema em espaldeira, com a mesma a quantidade de sólidos solúveis totais.Termos para indexação: Vitis labrusca, área de superfície foliar, fenologia, índice de área foliar, trocas gasosas. Physiology and production of 'Niagara Rosada' grapevine in vertical shoot positioning and in Y-shaped training systemsAbstract -The objective of this work was to characterize the physiological and productive variables of 'Niagara Rosada' vine (Vitis labrusca) trained in vertical shoot positioning (VSP) and in Y-shaped systems, in the first two years of production. In the 2014 and 2015 growing seasons, the following parameters were evaluated: leaf area index, photosynthesis, transpiration, stomatal conductance, leaf surface area, production variables, and fruit quality. In the first year of production, there were differences between the training systems for the ecophysiological variables affected by the leaf surface area of the canopies. In the second year of production, there were no differences between the ecophysiological variables. The number of clusters per leaf surface area, cluster mass, number of berries per cluster, and production per plant showed no differences between the training systems. Vines in the first and second years of production showed no differences between the two training systems for the relationships between leaf surface area and production; however, yield was higher in the VSP system because of the greater number of plants per hectare. Fruit produced in the Y-shaped system showed a greater amount of pigments, such as anthocyanins and flavonols, than those in the VSP system, with the same amount of total soluble solids.

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Proposal of an index for the objective evaluation of the colour of red table grapes

Cited by 177 publications

References 13 publications

Varietal Comparison of The Chemical, Physical, and Mechanical Properties of Five Colored Table Grapes

Varietal Comparison of The Chemical, Physical, and Mechanical Properties of Five Colored Table Grapes

Cold Storage and Biocontrol Agents to Extend the Storage Period of ‘BRS Isis’ Seedless Table Grapes

Fisiologia e produção da videira 'Niágara Rosada' nos sistemas de condução em espaldeira e em Y

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