1992 Main Results of the Eec Research Programme - Action C. Variability in Relation With Cultivar and Country

Dadomo, M.; Koutsos, T. V.; Portas, C.M.; Leoni, S.; Macua, J.I.; Gandolfi, Gino; Rodríguez, Arinda María Verbel; Taborda, M.L.

doi:10.17660/actahortic.1994.376.3

Cited by 3 publications

(4 citation statements)

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“…In general, our data correspond to the range reported previously for the same tomato fruit quality parameters. For example, the tomato fruit pH values ranged from 4.34 to 4.46, the soluble solid contents ranged from 4.77 to 6.45, and the acidity values ranged from 0.32 to 0.40 . The color values of 42 red-fruited S. lycopersicum varieties ranged from 0.99 to 2.16 .…”

Section: Resultsmentioning

confidence: 99%

Fruit Quality and Bioactive Compounds with Antioxidant Activity of Tomatoes Grown On-Farm: Comparison of Organic and Conventional Management Systems

Juroszek¹,

Lumpkin²,

Yang³

et al. 2009

J. Agric. Food Chem.

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Replicated field trials at three matched farm pairs in southern and central Taiwan were established in October 2004 and 2005 to compare fruit quality and nutritional parameters of tomatoes grown on-farm under organic versus conventional management systems in tropical and subtropical environments. Two processing tomato varieties were evaluated using a randomized complete block design at each of the farms. Aggregation of farms by type (organic vs conventional) across two years resulted in no significant differences between organic and conventional farming systems for all tomato fruit parameters measured, including quality (pH, soluble solids, acidity, and color), content of bioactive compounds with antioxidant activity (beta-carotene, lycopene, ascorbic acid, and total phenolics), and antioxidant activity. This study indicated no consistent effect of the farming system on tomato fruit parameters. Farm management skills combined with site-specific effects contributed to high lycopene levels, and the choice of variety significantly influenced the content of bioactive compounds, particularly ascorbic acid and total phenolics.

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Section: Resultsmentioning

confidence: 99%

Fruit Quality and Bioactive Compounds with Antioxidant Activity of Tomatoes Grown On-Farm: Comparison of Organic and Conventional Management Systems

Juroszek¹,

Lumpkin²,

Yang³

et al. 2009

J. Agric. Food Chem.

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“…However, it is important to know how to manage tomato crops to keep pH below a critical level for safe processing. 'Cannery Row', which is a good cultivar in terms of °Brix and viscosity (Dadomo et al 1994), is marginal for pH in New Zealand conditions and will benefit from a better understanding of influences onpH.…”

Section: Fruit Qualitymentioning

confidence: 99%

“…This requires heating the fruit before pulping to improve the accuracy of predicting viscosity (Wolcott et al 1987). After years of cultivar testing, typical ranges of each factor are known (Dadomo et al 1994) and target values are similar among processors. However, target values may vary for different end products and there is some specialisation of cultivars with high scores for specific quality indices, such as viscosity.…”

Section: Introductionmentioning

confidence: 99%

Quality of processing tomato(Lycoperscion esculentum)fruit from four bloom dates in relation to optimal harvest timing

Renquist

Reid

1998

New Zealand Journal of Crop and Horticultural Science

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Two related processing tomato (Lycoperscion esculentum (L.)) fruit quality issues were investigated: (1) the difficulty of representative sampling to test quality, given the wide range of fruit age at harvest time; and (2) identifying the best time to harvest for maximum quality. In a Hastings, New Zealand, trial we tagged large samples of opening flowers on each of four dates about a week apart, and at harvest we compared quality of fruit homogenate (puree). There was a distinct pattern of higher quality in the latest-set (youngest) fruit in terms of total solids, °Brix (soluble solids), titratable acidity, and Bostwick flow (gross viscosity). These data are indirect evidence that fruit would have higher quality if harvested at an earlier stage of maturity than currently practised. Average skin and puree colour were both slightly less red in the fruit from the last bloom date. However, these fruit were much more variable in colour than the earliest-set (oldest) fruit, raising the concern that fruit maturity and/or quality may not be a consistent function of fruit age.

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“…As a result, plantings 2 and 3 had a longer preharvest period without irrigation. Based on prior research at this site (Renquist and Reid, 2001), Decades of research on the quality of processed tomato products have led to welldefined quality criteria for fresh fruit at harvest (Dadomo et al, 1994). These include total solids (%), soluble solids concentration (SSC, measured as °Brix), pH, titratable acidity, viscosity, and color intensity.…”

mentioning

confidence: 99%

Temperature, But Not Ethephon, Influences Fruit pH of Processing Tomato

Renquist¹,

English²,

Reid³

2001

HortSci

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The pH of processing tomato at harvest is a key quality criterion and is critical for safe product storage. Maximum allowable fruit homogenate pH is often 4.5. Our objective was to quantify the influence of air temperature on pH, including any interaction with either fruit age or use of ethephon. Three planting dates were imposed as main treatments and ethephon as a subtreatment in a field trial, and each planting was harvested on four dates. Fruits were harvested from trusses tagged to identify three fruit age groups in sub-subplots. Temperature exerted primary control of tomato pH. The relationship of bulk fruit pH to thermal time was curvilinear (pH was always <4.55); however, when pH was related to thermal time from anthesis, a linear relationship resulted. The oldest fruit had a much higher pH (>4.5) than younger ones (mean pH for all dates = 4.3). Ethephon did not alter these temperature/pH relationships.

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1992 Main Results of the Eec Research Programme - Action C. Variability in Relation With Cultivar and Country

Cited by 3 publications

References 0 publications

Fruit Quality and Bioactive Compounds with Antioxidant Activity of Tomatoes Grown On-Farm: Comparison of Organic and Conventional Management Systems

Fruit Quality and Bioactive Compounds with Antioxidant Activity of Tomatoes Grown On-Farm: Comparison of Organic and Conventional Management Systems

Quality of processing tomato(Lycoperscion esculentum)fruit from four bloom dates in relation to optimal harvest timing

Temperature, But Not Ethephon, Influences Fruit pH of Processing Tomato

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