Effects of high electrical conductivity of nutrient solution and its application timing on lycopene, chlorophyll and sugar concentrations of hydroponic tomatoes during ripening

Wu, Min; Kubota, Chieri

doi:10.1016/j.scienta.2007.11.014

Cited by 96 publications

(74 citation statements)

References 44 publications

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“…Saito et al (2006) reported that tomato fruit Brix increased from 6.1 to 9.9% in a third-truss, high-density tomato production system when nutrient solution EC was increased and maintained at 8.0 dS·m -1 from first truss anthesis until fruit harvest by adding NaCl. Wu and Kubota (2008) also reported that tomato fruit Brix increased from 5.3% to 6.1% when nutrient solution EC was increased to 4.5 dS·m -1 at the pink stage. Although fruit sugar concentrations were increased by limiting water inflow to the fruit using salt stress, fruit yield was reduced as tomato fruits became smaller.…”

Section: Discussionmentioning

confidence: 83%

Effect of Moderate Salinity Stress on the Sugar Concentration and Fruit Yield in Single-truss, High-density Tomato Production System

Johkan

Nagatsuka

Yoshitomi

et al. 2014

J. Japan. Soc. Hort. Sci.

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To produce tomato fruits with 6% average Brix without decreasing yield, we investigated the effect of moderate salinity stress on Brix and yield in a single-truss, high-density tomato production system. Because tomato fruit development can be predicted from cumulative temperature, we also assessed cumulative temperature after anthesis as a potential indicator for determining the starting points of salinity stress treatments. When transverse diameters of the first fruit reached 4 cm (i.e., early increase treatment) or the first fruits were at the mature green stage (i.e., late increase treatment), nutrient solution electrical conductivity was slowly increased until the breaker stage from 1.8 dS·m -1 to 6.0 dS·m -1. Plants subjected to the late increase treatment produced tomato fruits with Brix values of 6% without reductions in marketable yield. We also increased nutrient solution electrical conductivity based on cumulative temperature after anthesis and found that early-treated plants produced tomatoes with higher Brix levels and yields than late-treated plants. In summary, moderate salinity stress to avoid excessive stress on plants increased sugar concentrations without decreasing fruit yield and resulted in tomato fruits with average Brix of about 6% when nutrient solution electrical conductivity was increased at a rate of 0.1 dS·m. Because seasonal differences in cumulative temperature influence the appropriate timing of salinity stress applications, further study is needed to optimize year-round growth under moderate salinity stress in single truss, high-density tomato production systems.

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Section: Discussionmentioning

confidence: 83%

Effect of Moderate Salinity Stress on the Sugar Concentration and Fruit Yield in Single-truss, High-density Tomato Production System

Johkan

Nagatsuka

Yoshitomi

et al. 2014

J. Japan. Soc. Hort. Sci.

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“…In this sense, the values of soluble solids found in this study could be due to cultural practices carried out in the greenhouse cultivation. Other authors [34] assert that the increase in soluble solids is the result of restricted flow of water to the fruit, due to the osmotic effect of the high electrical conductivity.…”

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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“…Antioxidants in tomato fruits have been a public health focus for many years. The lycopene content (LYC) in tomato fruit is an important source of lipid-soluble antioxidants in the human diet and can prevent the initiation or propagation of oxidizing chain reactions (Rousseaux et al, 2005;Wu and Kubota, 2008;Riadh et al, 2011). Total soluble solid content (SSC) is one of the main components of tomato flavor (Kader, 1986), and it is the property in tomato most likely to match the consumer perception of internal quality (Arazuri et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

Dynamic QTL analysis for fruit lycopene content and total soluble solid content in a Solanum lycopersicum x S. pimpinellifolium cross

Sun¹,

Lv²,

Wu³

et al. 2012

Genet. Mol. Res.

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ABSTRACT. Fruit lycopene content and total soluble solid content are important factors determining fruit quality of tomatoes; however, the dynamic quantitative trait loci (QTL) controlling lycopene and soluble solid content have not been well studied. We mapped the chromosomal regions controlling these traits in different periods in F 2:3 families derived from a cross between the domestic and wild tomato species Solanum lycopersicum and S. pimpinellifolium. Fifteen QTLs for lycopene and soluble solid content and other related traits analyzed at three different fruit ripening stages were detected with a composite interval mapping method. These QTLs explained 7-33% of the individual phenotypic variation. QTLs detected in the color-changing period were different from those detected in the other two periods. On chromosome 1, the soluble solid content QTL was located in the same region during the color-changing and full-ripe periods. On chromosome 4, the same QTL for lycopene content was found during the colorchanging and full-ripe periods. The QTL for lycopene content on chromosome 4 co-located with the QTL for soluble solid content during the full-ripe period. Co-location of lycopene content QTL ©FUNPEC-RP www.funpecrp.com.br Genetics and Molecular Research 11 (4): 3696-3710 (2012) QTL analysis in S. lycopersicum x S. pimpinellifolium cross 3697and soluble solid content QTLs may be due to pleiotropic effects of a single gene or a cluster of genes via physiological relationships among traits. On chromosome 9, the same two QTLs for lycopene content at two different fruit ripening periods may reflect genes controlling lycopene content that are always expressed in tomato fruit development.

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Effects of high electrical conductivity of nutrient solution and its application timing on lycopene, chlorophyll and sugar concentrations of hydroponic tomatoes during ripening

Cited by 96 publications

References 44 publications

Effect of Moderate Salinity Stress on the Sugar Concentration and Fruit Yield in Single-truss, High-density Tomato Production System

Effect of Moderate Salinity Stress on the Sugar Concentration and Fruit Yield in Single-truss, High-density Tomato Production System

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

Dynamic QTL analysis for fruit lycopene content and total soluble solid content in a Solanum lycopersicum x S. pimpinellifolium cross

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