Effects of Nutrient Solution Ec, Plant Microclimate and Cultivars on Fruit Quality and Yield of Hydroponic Tomatoes (Lycopersicon Esculentum)

Wu, Min; Buck, Johann S.; Kubota, Chieri

doi:10.17660/actahortic.2004.659.70

Cited by 37 publications

(23 citation statements)

References 14 publications

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“…An increase in salinity by 45% with NaCl or NaCl/ KCl (1:1) did not change lycopene content, but it decreased b-carotene and vitamin C content and increased lutein concentration by 79% (Dorais et al 2000). With different tomato cultivars and growing conditions, however, Wu et al (2004) 34-85% increase in lycopene content on a fresh weight basis when salinity was increased from 2.4 to 4.5 mS cm -1 . De Pascale et al (2001) observed that the optimum total carotenoids and lycopene content (on a fresh and dry weight basis) was reached when salinity was 4.0-4.4 mS cm -1 (0.25% NaCl), while ascorbic acid content increased with salinity up to 15.7 mS cm -1 .…”

Section: Irrigation Management and Salinitymentioning

confidence: 97%

Tomato (Solanum lycopersicum) health components: from the seed to the consumer

2008

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It is widely accepted that a healthy diet is an important factor in preventing chronic diseases, and in improving energy balance and weight management. Studies have shown strong inverse correlations between tomato consumption and the risk of certain types of cancer, cardiovascular diseases and age-related macular degeneration. Because tomato is the second-most important vegetable in the world after potato, this horticultural crop constitutes an excellent source of health-promoting compounds due to the balanced mixture of minerals and antioxidants including vitamins C and E, lycopene, b-carotene, lutein and flavonoids such as quercetin. Improvement in phytonutrients in tomatoes can be achieved by cultivar selection, environmental factors, agronomic practices, stage of ripeness at harvest, and appropriate handling and conditioning all the way from the field to the consumer. The purpose of this paper is to review the recent literature of the main factors that can improve the nutritional quality of tomato and consequently their beneficial role in human diet. The importance of genotype selection and the optimization of environmental conditions (light, temperature, humidity, atmospheric CO 2 and air pollutants) for high nutritional value is outlined first, followed by the optimization of agricultural practices (soil properties, water quality, mineral nutrition, salinity, grafting, pruning, growing systems, growth promoters, maturity, and mechanical and pest injuries). The review concludes by identifying several prospects for future research such as modelling and genetic engineering of the nutritional value of tomato.

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Section: Irrigation Management and Salinitymentioning

confidence: 97%

Tomato (Solanum lycopersicum) health components: from the seed to the consumer

2008

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“…1. Lycopene concentration of vine-ripe tomato fruit as affected by EC (electrical conductivity) and cultivar (Wu et al, 2004). Under high EC (4.5 dS·m -1 ), fruit lycopene concentration increased significantly in all four cultivars ('Blitz', 'Mariachi', 'Quest', and 'Rapsodie') compared to those under low EC (2.4 dS·m -1 ).…”

Section: Production Of High Lycopene Tomato Under Controlled Environmmentioning

confidence: 97%

“…The recent study at the Controlled Environment Agriculture Program, The University of Arizona, showed that lycopene concentration of tomato fruit was enhanced significantly without reducing the total fruit yield by growing plants under a moderate salt stress provided by high salt concentration in the nutrient solution (Wu et al, 2004). The fruit quality when plants were grown hydroponically using a nutrient solution with higher electrical conductivity (EC) was significantly greater than those grown under the standard conditions (low EC) (Wu et al, 2004). Most importantly this higher EC growing condition resulted in significant increases in lycopene concentration.…”

Section: Production Of High Lycopene Tomato Under Controlled Environmmentioning

confidence: 99%

Controlled Environments for Production of Value-added Food Crops with High Phytochemical Concentrations: Lycopene in Tomato as an Example

Kubota¹,

Thomson²,

Wu³

et al. 2006

HortSci

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Plants produce various phytochemicals that are of nutritional and medicinal value to humans. Phytochemicals having antioxidant capacity are drawing increased interest from consumers. Population studies among Americans have consistently demonstrated inadequate consumption of fruit and vegetables. Improving intake of fruit and vegetables has been a major public health effort for many years with minimal success. Given this, it seems opportunistic to consider other approaches to enhance the nutritional quality of the American diet. One plausible approach is the development of fresh produce containing a greater concentration of phytochemicals known to improve health, thus while consuming fewer servings of produce, Americans would still have significant exposure to health-promoting food constituents. Controlled environments provide a unique opportunity to modify the concentrations of selected phytochemicals in fruit and vegetables, yet practical information is limited regarding methods effective in optimizing antioxidant capacity. Our research at the University of Arizona Controlled Environment Agriculture Program has shown that application of moderate salt stress to tomato plants can enhance lycopene and potentially other antioxidant concentrations in fruit. The increase in lycopene in response to salt stress in the tomato fruit was shown to be cultivar specific, varying from 34% to 85%. Although the specific biological mechanisms involved in increasing fruit lycopene deposition has not been clearly elucidated, evidence suggests that increasing antioxidant concentrations is a primary physiological response of the plant to the salt stress. Another experiment showed that low temperature during postharvest increased antioxidant capacity of tomato fruit while it maintained the lycopene concentration. More detailed study in this area is needed including accumulation of antioxidant phytochemicals as affected by environmental conditions during the cultivation and the postharvest.

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“…According to other authors [31][32][33], the increasing of nutrients concentration in solution during the preparation of fertilizers, causes an increase in the electrical conductivity of soils, which is associated with the increase of total soluble solids in tomatoes. In this sense, the values of soluble solids found in this study could be due to cultural practices carried out in the greenhouse cultivation.…”

Section: Variation Of Soluble Solids Ph and Titrable Acidity Duringmentioning

confidence: 99%

Effect of chitosan-olive oil emulsion coating on quality of tomatoes during storage at ambient conditions

Dovale-Rosabal

Casariego

Forbes-Hernández

et al. 2015

JBR

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Abstract. BACKGROUND:Tomato, a berry with a high nutritional content, is one of the most important vegetables due to its commercial importance, easy manipulation and rapid production cycle. The application of biodegradable films and coatings as alternative preservation method, provides a protective layer and creates a modified atmosphere in the fruit. OBJECTIVE: The aim of the present study was to evaluate the influence of chitosan-olive oil coatings on the quality of tomatoes cv. Charleston during their storage at 27 ± 1• C and 80% RH. METHODS: According with the treatments, chitosan at 1 and 2% (w/v) in 1% (v/v) of lactic acid was dissolved by stirring during 2 h at 40• C and then was emulsified with olive oil at 2 and 4% (v/v). RESULTS: Tomatoes coated with chitosan at 2% (w/v) with 2 and 4% (v/v) of olive oil presented the higher weight losses. CONCLUSIONS: Coatings from chitosan-olive oil emulsion delayed the ripening and maintained the firmness of tomatoes cv. Charleston with respect to uncoated fruits during storage, although these coatings did not act as an effective barriers against the weight loss. These results can be helpful for horticulturists and agro-food products distributors, as well as for the postharvest technologists.

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Effects of Nutrient Solution Ec, Plant Microclimate and Cultivars on Fruit Quality and Yield of Hydroponic Tomatoes (Lycopersicon Esculentum)

Cited by 37 publications

References 14 publications

Tomato (Solanum lycopersicum) health components: from the seed to the consumer

Tomato (Solanum lycopersicum) health components: from the seed to the consumer

Controlled Environments for Production of Value-added Food Crops with High Phytochemical Concentrations: Lycopene in Tomato as an Example

Effect of chitosan-olive oil emulsion coating on quality of tomatoes during storage at ambient conditions

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