QUALITY OF PROCESSING TOMATO FRUITS IN COMPETITION WITH Solanum americanum

ABSTRACT Five experiments were conducted to evaluate the hypothesis that Solanum americanum density and time of coexistence affect the quality of processing tomato fruit. The tomato crop was established using either the direct drilling or the transplanting technique. The factors evaluated consisted of weed density (from 0 up to 6 plants m-2) and time of weed interference (early bloom stage, full flowering stage, fruit filling, and harvest time). The effects of competition on tomato fruit quality were analysed using a multiple model. Tomato variables evaluated included industrial fruit types (which depended on ripeness and disease infection) and soluble solids level(obrix). Tomato fruit quality is dependent on the factors tested. Under low densities (< 6 plants m-2) of S. americanum there was a small impact on the quality of the tomato fruits. The percentage of grade A (mature fruit with red color and without pathogen infection) tomato fruits is the variable most affect by the independent variables. The impact of these independent variables on the percentage of grade C (green and/or with more than 15% disease infection) tomato yield was of smaller magnitude and in an inverse trend as the observed for grade A. The level of soluble solids was influenced by the weed interference on only two experiments, but the impact was of small magnitude. The impact of the results on current and future crop management practices is discussed.

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Impact of Selenium and Copper Nanoparticles on Yield, Antioxidant System, and Fruit Quality of Tomato Plants

Plants ◽

10.3390/plants8100355 ◽

2019 ◽

Vol 8 (10) ◽

pp. 355 ◽

Cited By ~ 12

Author(s):

Hernández-Hernández ◽

Quiterio-Gutiérrez ◽

Cadenas-Pliego ◽

Ortega-Ortiz ◽

Hernández-Fuentes ◽

...

Keyword(s):

Vitamin C ◽

Fruit Quality ◽

Tomato Fruit ◽

Titratable Acidity ◽

Good Alternative ◽

Soluble Solids ◽

Antioxidant Compounds ◽

Tomato Yield ◽

The Impact

The effects of nanoparticles (NPs) on plants are contrasting; these depend on the model plant, the synthesis of the nanoparticles (concentration, size, shape), and the forms of application (foliar, substrate, seeds). For this reason, the objective of this study was to report the impact of different concentrations of selenium (Se) and copper (Cu) NPs on yield, antioxidant capacity, and quality of tomato fruit. The different concentrations of Se and Cu NPs were applied to the substrate every 15 days (five applications). The yield was determined until day 102 after the transplant. Non-enzymatic and enzymatic antioxidant compounds were determined in the leaves and fruits as well as the fruit quality at harvest. The results indicate that tomato yield was increased by up to 21% with 10 mg L−1 of Se NPs. In leaves, Se and Cu NPs increased the content of chlorophyll, vitamin C, glutathione, 2,2′-azino-bis(3-ethylbenzthiazolin-6-sulfonic acid (ABTS), superoxide dismutase (SOD), glutathione peroxidase (GPX) and phenylalanine ammonia liasa (PAL). In fruits, they increased vitamin C, glutathione, flavonoids, firmness, total soluble solids, and titratable acidity. The combination of Se and Cu NPs at optimal concentrations could be a good alternative to improve tomato yield and quality, but more studies are needed to elucidate their effects more clearly.

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Effect of a Saline Nutritional Regime on Tomato Fruit Yield and on Enhancement of Fruit Quality

Journal of Agricultural and Marine Sciences [JAMS] ◽

10.24200/jams.vol1iss0pp17-23 ◽

1996 ◽

Vol 1 ◽

pp. 17

Author(s):

S. A. AI-Rawahy ◽

S.M.E. Satti ◽

M. V. Lopez

Keyword(s):

Fruit Quality ◽

Tomato Fruit ◽

Titratable Acidity ◽

Total Solid ◽

Fruit Yield ◽

Soluble Solids ◽

Quality Enhancement ◽

Tomato Fruits ◽

Nacl Concentration

The effect of a saline nutritional regime on tomato (Lycopersicon esculentum Mill.) fruit yield and fruit quality enhancement for five cultivars (CLN 425, Pearson, Napoli, Hymar, and Sierra) was studied. The saline nutrient treatment consisted of (i) a control. Hoagland's solution (EC=2.5 mScm -1), (ii) Hoagland's solution + 50 mM NaCl (EC=7.46 mScm-1), (iii) Hoagland's solution + 50 mM NaCl + 4 mM K2SO4 + 2 mM H3PO4 (EC=8.31mScm-1), (iv) same as in (iii)3 but applied when plants were at 50% flowering, then the plants were irrigated with Hoagland’s solution as in the control, and (v) same as in (iii) until the plans were at 5096 flowering, thereafter NaCl concentration was reduced to 25mM (EC=5.87 mscm-1). Plans were seven weeks old at the start of the saline treatments. Each plant was in PVC cylindrical pots (15 cm diameter and 27 cm height) containing washed quartz sand. Fruits were harvested once weekly for ten weeks at incipient red. The control gave a higher fruit yield than the saline treatments. However, the tomato fruits from thesaline treatments had higher titratable acidity, higher total soluble solids, and higher total solid indicating better quality of the fruits than those from the control. Of the five cultivars studied, Hymar had the highest fruit yield followed by Pearson. Hymar’s quality was also highest, followed by CLN 425. Napoli was the most susceptible to salinity and Sierra had the lowest quality.

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Abscisic acid on the quality of tomato fruits

Scientia Agraria Paranaensis ◽

10.18188/sap.v19i1.22876 ◽

2020 ◽

Vol 1 (1) ◽

pp. 38

Author(s):

Carlos Agostinho Balate ◽

Douglas Correa de Souza ◽

Luis Felipe Lima e Silva ◽

Luciane Vilela Resende ◽

Sergio Tonetto de Freitas ◽

...

Keyword(s):

Abscisic Acid ◽

Fruit Quality ◽

Tomato Fruit ◽

Titratable Acidity ◽

Physicochemical Characteristics ◽

Quality Parameters ◽

Soluble Solids ◽

Exogenous Aba ◽

Root Treatment

The use of abscisic acid (ABA) in agriculture has increased in the last few years due to the increase in ABA commercial availability at lower costs. The objective of this study was to determine the effect of exogenous ABA on tomato fruit quality parameters such as soluble solids (SS), total and soluble pectins, titratable acidity (TA) and flesh firmness. Tomatoes from the cultivar ‘Santa Clara’ were the study followed a complete randomized block desig, with four treatments in five repetitions. The treatments were plants not treated with ABA (control), foliar sprayed with ABA at 500 mg L-1, 150 mL drench with ABA at 500 mg L-1, or foliar plus drench treated with ABA. After harvesting, the physicochemical characteristics of the fruits were evaluated in the laboratory. All treatments were weekly applied to the plants from anthesis to harvest at fully maturity. Root treatment increased SS by up to 26.12%, increased ratio SS/TA, firmness and decreased soluble pectin. According to the results, it can be concluded that the application of ABA to leaves and roots can improve fruit quality by increasing the SS, ratio SS/TA. The method of application affects the SS content.

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Potassium Requirements for Maximum Yield and Fruit Quality of Processing Tomato

Journal of the American Society for Horticultural Science ◽

10.21273/jashs.124.2.199 ◽

1999 ◽

Vol 124 (2) ◽

pp. 199-204 ◽

Cited By ~ 24

Author(s):

T.K. Hartz ◽

G. Miyao ◽

R.J. Mullen ◽

M.D. Cahn ◽

J. Valencia ◽

...

Keyword(s):

Fruit Quality ◽

Maximum Yield ◽

Field Trials ◽

Quality Parameters ◽

Fruit Color ◽

Soluble Solids ◽

Exchangeable K ◽

Processing Tomato ◽

The Impact ◽

The Relationship

A survey of 140 processing tomato (Lycopersicon esculentum Mill.) fields in central California was conducted in 1996-97 to examine the relationship between K nutrition and fruit quality for processing. Quality parameters evaluated were soluble solids (SS), pH, color of a blended juice sample, and the percent of fruit affected by the color disorders yellow shoulder (YS) or internal white tissue (IWT). Juice color and pH were not correlated with soil K availability or plant K status. SS was correlated with both soil exchangeable K and midseason leaf K concentration (r = 0.25 and 0.28, p < 0.01) but the regression relationships suggested that the impact of soil or plant K status on fruit SS was minor. YS and IWT incidence, which varied among fields from 0% to 68% of fruit affected, was negatively correlated with K status of both soil and plant. Soil exchangeable K/√Mg ratio was the measure of soil K availability most closely correlated with percent total color disorders (YS + IWT, r = -0.45, p < 0.01). In field trials conducted to document the relationship between soil K availability and the fruit color disorders, soil application of either K or gypsum (CaSO4, to increase K/√Mg ratio) reduced YS and total color disorders. Multiple foliar K applications were effective in reducing fruit color disorders at only one of two sites. In no field trial did K application improve yield, SS, or juice color.

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DCPTA Ineffective as a Production Aid on Field-grown Tomato and Pepper

HortScience ◽

10.21273/hortsci.30.1.78 ◽

1995 ◽

Vol 30 (1) ◽

pp. 78-79 ◽

Cited By ~ 4

Author(s):

T.K. Hartz ◽

L.J. Kies ◽

A. Baameur ◽

D.M. May

Keyword(s):

Seed Treatment ◽

Foliar Spray ◽

Field Trials ◽

Soluble Solids ◽

Fresh Market ◽

Tomato Fruits ◽

Processing Tomato ◽

Solids Concentration ◽

Soluble Solids Concentration

Application of DCPTA, as a seed treatment and a foliar spray, was evaluated for effects on productivity and fruit quality of processing tomato (Lycopersicon esculentum Mill.) and fresh-market pepper (Capsicum annuum L.). Two field trials for each crop were conducted in California during 1992. No DCPTA treatment was effective in increasing vegetative growth or fresh fruit yield of either crop at any site. Total soluble solids concentration and color of tomato fruits were unaffected by DCPTA, regardless of application method. We conclude that DCPTA is not a useful production aid for field-grown tomato or pepper. Chemical name used: 2-(3,4-dichlorophenoxy) triethylamine (DCPTA).

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Characterization of tomato growth and fruit quality under foliar ammonium sprays

Open Agriculture ◽

10.1515/opag-2017-0055 ◽

2017 ◽

Vol 2 (1) ◽

Cited By ~ 1

Author(s):

Mohammad Kazem Souri ◽

Sara Dehnavard

Keyword(s):

Plant Growth ◽

Ammonium Sulfate ◽

Fruit Quality ◽

Foliar Application ◽

Tomato Fruit ◽

Nitrogen Concentration ◽

Titratable Acidity ◽

Soluble Solids ◽

Quality Factors

AbstractThis study was done to evaluate the effects of foliar application of ammonium sulfate on growth and fruit quality of tomato plants under hydroponic culture system. Over four months of tomato plant growth, plants were sprayed once per week with different concentrations of ammonium sulfate (0, 50, 100 and 200 mM), as well as with 50 mM every second day. Foliar application of ammonium sulfate led to reductions in many growth and quality parameters, and higher ammonium concentrations exerted greater reductions. Number of leaves, fresh weight of shoots, percentage of leaf dry weight and fruit yield were negatively associated with the treatment with ammonium sulfate. However, leaf nitrogen concentration, fruit diameter and fruit length increased significantly by the application of ammonium. Fruit quality factors were also affected by ammonium sulfate spray treatments. The maximum pH, titratable acidity and total soluble solids (TSS) were obtained from the lowest (50 mM) weekly application of ammonium sulfate. The results indicate that foliar application of ammonium in moderate concentrations could have beneficial effects on plant growth and quality of tomato fruit.

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Improvement of the nutraceutical quality and yield of tomato by application of salicylic acid

Notulae Botanicae Horti Agrobotanici Cluj-Napoca ◽

10.15835/nbha48211914 ◽

2020 ◽

Vol 48 (2) ◽

pp. 882-892 ◽

Cited By ~ 1

Author(s):

Oscar SARIÑANA-ALDACO ◽

Esteban SANCHEZ-CHAVEZ ◽

Manuel FORTIS-HERNÁNDEZ ◽

José Antonio GONZÁLEZ-FUENTES ◽

Alejandro MORENO-RESENDEZ ◽

...

Keyword(s):

Salicylic Acid ◽

Tomato Fruit ◽

Well Being ◽

Fruit Weight ◽

Average Concentration ◽

Soluble Solids ◽

Tomato Crop ◽

Tomato Fruits ◽

Nutritive Solution

Tomato fruits are a unique functional food and a natural reservoir of nutrients, antioxidants, vitamins and bioactive compounds that improve nutrition and human health. As an important vegetable throughout the world, tomatoes have attracted the attention of researchers to carry out various strategies to improve the functionality of this food aimed at the prevention of diseases, health and global well-being. An agronomic strategy in this study was to evaluate the influence of the application of "salicylic acid (SA)" on the yield and nutraceutical quality of the tomato crop, produced under hydroponic conditions. A completely randomized experimental design with six repetitions was used. SA at five doses (0.025, 0.05, 0.075, 0.1 and 0.125 mM) and one control were applied every 15 days in the nutritive solution under a hydroponic system on tomato plants. The evaluated variables were yield (total fruit weight per plant), fruit parameters (weight, diameter, firmness, and total soluble solids), percentage of weight loss and nutraceutical quality of tomato. The results obtained indicate that the addition of salicylic acid in nutritive solution increased the yield and biosynthesis of phytochemical compounds in tomato fruits, in relation to the control without application. In conclusion, to obtain a higher nutraceutical quality without affecting the tomato fruit yield, it is recommended to use the average concentration (0.125 mM) of SA.

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Nutritional Quality of Field-grown Tomato Fruit as Affected by Grafting with Interspecific Hybrid Rootstocks

HortScience ◽

10.21273/hortsci11275-16 ◽

2016 ◽

Vol 51 (12) ◽

pp. 1618-1624 ◽

Cited By ~ 12

Author(s):

Desire Djidonou ◽

Amarat H. Simonne ◽

Karen E. Koch ◽

Jeffrey K. Brecht ◽

Xin Zhao

Keyword(s):

Ascorbic Acid ◽

Fruit Quality ◽

Interspecific Hybrid ◽

Nutritional Quality ◽

Tomato Fruit ◽

Quality Attributes ◽

Soluble Solids ◽

Fresh Market ◽

Tomato Plants

In this study, the effects of grafting with interspecific hybrid rootstocks on field-grown tomato fruit quality were evaluated over a 2-year period. Fruit quality attributes from determinate ‘Florida 47’ tomato plants grafted onto either ‘Beaufort’ or ‘Multifort’ rootstocks were compared with those from non- and self-grafted controls. Grafted plants had higher fruit yields than non- and self-grafted plants, and increased production of marketable fruit by ≈41%. The increased yield was accompanied by few major differences in nutritional quality attributes measured for these fruit. Although grafting with the interspecific rootstocks led to consistently small, but significant increases of fruit moisture (≈0.6%), flavor attributes such as total titratable acidity (TTA) and the ratio of soluble solids content (SSC) to TTA were not significantly altered. Among the antioxidants evaluated, ascorbic acid concentration was reduced by 22% in fruit from grafted plants, but significant effects were not evident for either total phenolics or antioxidant capacity as assayed by oxygen radical absorbance capacity (ORAC). Levels of carotenoids (lycopene, β-carotene, and lutein) were similar in fruit from grafted plants with hybrid rootstocks compared with non- and self-grafted controls. Overall, the seasonal differences outweighed the grafting effects on fruit quality attributes. This study showed that grafting with interspecific hybrid rootstocks could be an effective horticultural technique for enhancing fruit yield of tomato plants. Despite the modest reduction in ascorbic acid content associated with the use of these rootstocks, grafting did not cause major negative impacts on fruit composition or nutritional quality of fresh-market tomatoes.

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Postharvest quality of tomato as affected by nitrogen and sulfur interaction

Acta Agronómica ◽

10.15446/acag.v69n2.73691 ◽

2020 ◽

Vol 69 (2) ◽

pp. 130-135

Author(s):

Matias Siueia Júnior ◽

Maria Ligia de Souza Silva ◽

Anderson Ricardo Trevizam ◽

Valdemar Faquin ◽

Deivisson Ferreira da Silva

Keyword(s):

Vitamin C ◽

Fruit Quality ◽

Tomato Fruit ◽

Beta Carotene ◽

Titratable Acidity ◽

Soluble Solids ◽

Postharvest Quality ◽

Solanum Lycopersicum L ◽

Randomized Design

Nitrogen (N) and sulfur (S) are nutrients that, in addition to influencing plant growth and production, interfere with processes related to postharvest fruit quality. In the present study, N x S interaction was evaluated in the postharvest quality of tomato (Solanum lycopersicum L.). The experiment was conducted in a greenhouse using 5 dm3 capacity vessels containing a 0-20 cm layer of a dystropherric Red Latosol. A 5 x 3 factorial design was used, with combinations of five doses of N (0, 100, 200, 300 and 400 mg dm-3) and three doses of S (0, 60 and 120 mg dm-3) distributed in a completely randomized design, with four repetitions. After harvest, the attributes of fruit quality were evaluated: firmness, pH, soluble solids (SS), titratable acidity (AT), soluble solids ratio and titratable acidity (SS / AT), vitamin C, lycopene and beta-carotene. An increase in firmness was observed, as well as the content of soluble solids, titratable acidity and the SS / AT ratio of the fruits as a result of the interaction N x S. However, this interaction favoured the reduction of the contents of vitamin C, lycopene and beta-carotene, and the quality characteristics of tomato fruit in relation to the recommended values. Only the increasing doses of N favoured a higher pH in the tomato fruits.

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Assessment of locally produced waxing materials on the shelf life and fruit quality of two tomato varieties (Solanum lycopersicum)

Journal of Energy and Natural Resource Management ◽

10.26796/jenrm.v4i1.73 ◽

2017 ◽

Vol 4 (1) ◽

pp. 36-47

Author(s):

R. Osae G. Essilfie J. O. Anim

Keyword(s):

Shelf Life ◽

Tomato Fruit ◽

Chemical Properties ◽

Storage Period ◽

Cassava Starch ◽

Soluble Solids ◽

Shea Butter ◽

Tomato Fruits ◽

Randomized Design ◽

Colour Development

The study was conducted to assess the effect of different waxing materials on the quality attributes of tomato fruits. A 2 x8 factorial experiment layout in complete randomized design with 16 treatment combinations and 3 replication was adopted.The materials that were used for the experiment are two (2) varieties of tomatoes (Pectomech and Power Rano) and seven(7) waxing material (shea butter, cassava starch, beeswax, and a combination of shea butter + cassava starch, shea butter + beeswax, cassava starch + beeswax, shea butter + cassava starch + beeswax) and a control. Results from the experiment indicated that all waxing treatments delayed the development of weight loss, firmness, pH, total soluble solids, and total titrable acidity. The results also suggested that edible wax coatings delayed the ripening process and colour development of tomato fruits during the storage period and extended the shelf life. However Beewax treatment and its combinations performed better than the other treatments. It was therefore recommended that locally produced wax such as Beewax, Shea butter, Cassava Starch treatments and their combinations could be a good technology for preserving the quality and extending the shelf life of fresh tomato fruit as well as maintaining the physical and chemical properties.

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