scholarly journals The Influence of Biostimulants on Tomato Plants Cultivated under Hydroponic Systems

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Mostafa M. Abdelkader ◽  
Magomed S. Gaplaev ◽  
Aslambek A. Terekbaev ◽  
Mikhail Y. Puchkov
Keyword(s):  
Amino Acids ◽  
Growth Parameters ◽  
Tomato Fruit ◽  
Quality Parameters ◽  
Soluble Solids ◽  
Tomato Plants ◽  
Hydroponic System ◽  
Fruit Acidity ◽  
Hybrid Cultivar ◽  
Micro Elements

Abstract Two biostimulants, RutfarmMaxifol (Ascophyllum nodosum extract 17.5%, amino acids, macro- and microelements, Agromaster, Russia) and Radifarm (polysaccharides, glycosides, amino acids, and micro-elements; Valagro, Italy), were applied at different concentrations on tomato plants of the hybrid cultivar ‘Merlice’, grown under a hydroponic system. Biostimulants were applied in the form of seed soaking and twice as foliar sprayings at flowering and at the initial fruit development stages. Biostimulants were applied as water solutions at concentrations of 2.5, 5.0, and 7.5 mg·L−1. Plant growth, productivity, and fruit quality parameters were determined at three points: 35, 70, and 105 days after seeding. All biostimulant treatments resulted in higher values of growth parameters and yield productivity in relation to the control. The application of biostimulants improved the parameters of the fruits’ quality by increasing the total soluble solids and antioxidants, ascorbic acid, and carotenoid contents but it did not affect tomato fruit acidity; therefore, tomato fruits from the treated plants were tastier than those from control.

scholarly journals Effects of treated agro-industrial wastewater irrigation on tomato processing quality

2015 ◽  
Vol 10 (2) ◽  
pp. 97 ◽  
Author(s):  
Giuseppe Gatta ◽  
Angela Libutti ◽  
Anna Gagliardi ◽  
Grazia Disciglio ◽  
Luciano Beneduce ◽  
...  
Keyword(s):  
Industrial Wastewater ◽  
Tomato Fruit ◽  
Titratable Acidity ◽  
Quality Parameters ◽  
Soluble Solids ◽  
Treated Wastewater ◽  
Long Term Effects ◽  
Tomato Production ◽  
Tomato Processing ◽  
Solids Content

This study was designed to determine the qualitative and microbiological impact of two different sources of irrigation water on tomato fruit: groundwater (GW), as the control, and treated agro-industrial wastewater (SW). The mean tomato fruit quality parameters of dry matter, weight, diameter, colour index, pH, soluble solids content, titratable acidity, Ca<sup>2+</sup> and Na<sup>+</sup> content were not significantly affected by the different water treatments. Conversely, NO<sub>3</sub> <sup>–</sup> contents was significantly higher with GW use, than with SW (2.21 <em>vs</em> 1.62 mg 100 g<sup>–1</sup>, respectively; P≤0.05). The microbial quality of the tomato fruit was not significantly different across the GW and SW treatments, with no <em>Salmonella</em> spp. isolated from any of the fruit, and the faecal indicators always below 10 CFU g<sup>–1</sup>. These data show that agro-industrial treated wastewater can be used for irrigation for industrial tomato production once the long-term effects on the agroecosystem have been defined.

scholarly journals Abscisic acid on the quality of tomato fruits

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.

scholarly journals Growth and yield of pomato under the Syrian coastal mountains conditions

2021 ◽  
Vol 13 (4) ◽  
pp. 382-388
Author(s):  
Alaa Suhiel Ibrahim
Keyword(s):  
Fruit Set ◽  
Tomato Fruit ◽  
Shape Index ◽  
The Other ◽  
Soluble Solids ◽  
Growth And Yield ◽  
Potato Tubers ◽  
Average Yield ◽  
Tomato Plants ◽  
Significant Superiority

Abstract. The world has always been striving to increase and intensify agricultural production, and there are several attempts to acheive that, such as grafting tomato on potato to obtain two crops from one plant. This investigation was conducted during 2020 in open field in Nahl village, Baniyas, Tartous Governorate, Syria. The vegetative and generative growth and yield have been studied for pomato (grafted tomato on potato) and compared to each tomato and potato separately. Tomato plants were significantly superior in plant height to pomato plants after 23 days of planting until the end of the experiment. On the other hand, there were significant differences between tomato plants and pomato plants in the leaf area after 23, 51 and 65 days of planting. Also, tomato plants significantly outperformed pomato plants in the number of flowers and fruits per plant and the tomato fruit set percent. Anyway, tomato plants were significantly superior in the average yield of tomato fruits per plant (1657 g.plant-1) to pomato plants (185 g.plant-1), while there were insignificant differences in the average yield of potato tubers per plant between pomato which failed to produce tubers and potato (48.25 g.plant-1). Studying the tomato fruit fresh weight showed a significant superiority of tomato plants (54.37 g.fruit-1) to pomato plants (35.97 g.fruit-1), while there were insignificant differences in the other physical (tomato fruit height, diameter and shape index) and chemical (tomato fruit content of total acids, total soluble solids and dry matter, %) properties.

scholarly journals The effect of pruning systems on yield and fruit quality of grafted tomato

2017 ◽  
Vol 35 (2) ◽  
pp. 247-251
Author(s):  
Isabel Mourão ◽  
Luis M Brito ◽  
Luisa Moura ◽  
Maria E Ferreira ◽  
Sofia R Costa
Keyword(s):  
Fruit Quality ◽  
Total Yield ◽  
Quality Parameters ◽  
Soluble Solids ◽  
Planting Density ◽  
Average Yield ◽  
Tomato Plants ◽  
Cotyledonary Nodes ◽  
Yield And Quality ◽  
Number Of Stems

Abstract Vegetable grafting is an increasingly used crop management strategy that aims to prevent soilborne biotic and abiotic stresses. For tomato crops, the number of stems per grafted plant determines planting density and crop exposure to sunlight. The effects of pruning grafted plants on yield and fruit quality have not been established, and this information is crucial to support decision-making by growers. A greenhouse experiment was run in the spring/summer season in the NW Portugal to assess the yield and quality parameters for grafted tomato plants (cv. Vinicio grafted onto Multifort rootstock) pruned to 2, 3 and 4 stems developed from the plant first nodes, or pruned to 2 stems developed from cotyledonary nodes, according to common practice. Total yield was significantly increased for the double-stemmed tomato plants, irrespectively of node origin (average yield 26.5 kg/m2), as compared to the 3- and 4-stemmed plants (average yield 19.5 kg/m2). These results can be explained by root system limitations to uptake water and nutrients coupled with the stronger competition between stems for the 3- and 4-stemmed plants. Fruit quality assessed through firmness (1.0 kg/cm2), soluble solids (5.1°Brix), acidity (1.0 g/100 g fresh weight), pH (4.4) and dry mater content (4.9%) was not affected by pruning systems. The greater yield obtained from double-stemmed plants offsets the increased planting and seedlings costs of using grafted tomato plants, particularly so for double-stemmed plants grown from first nodes, as they do not require intensive nursery care and are therefore less costly than those grown from cotyledonary nodes.

Processing tomato fruit quality: influence of soil water deficits at flowering and ripening

2001 ◽  
Vol 52 (8) ◽  
pp. 793 ◽  
Author(s):  
A. Richard Renquist ◽  
Jeff B. Reid
Keyword(s):  
Soil Water ◽  
Fruit Quality ◽  
Root Zone ◽  
Tomato Fruit ◽  
Irrigation Management ◽  
Colour Change ◽  
Quality Parameters ◽  
Time Domain Reflectometry ◽  
Soluble Solids ◽  
Water Deficits

One way to reduce the production cost of tomato solids is to increase fruit solids at harvest time. In a field trial using 200-L containers the effects of early and late soil water deficits (treatments DE and DL) on fruit yield and quality were tested during either flowering or late fruit growth. The effect of standard irrigation, with water cut off during the 3–5 weeks before harvest (SC), was also compared with full-season irrigation (FS). Manual irrigation of containers twice per week replaced soil water loss, measured by time domain reflectometry. A rain shelter was used as needed. The duration of the DL treatment was 43 days, which was intended to equate to 60–70 days of slower root-zone drying by finer textured field soils. Soil matric potentials were as low as –1500 kPa during both DE and DL. Fruit colour change was accelerated by DL; fruit were 97% red at harvest as against 89–93% for the other 3 regimes. Fruit yields of treatments other than DL were all near 93 t/ha. Yield of DL was reduced 38%, mainly due to 35% smaller fruit. Fruit quality parameters [soluble solids concentration (SSC), total solids, and titratable aciditymp;rsqb; were similar in the 3 higher yielding regimes, but were much greater in the DL treatment. Fruit pH was also more favourable (i.e. lower) in DL. The SSC was 2.8;deg;Brix higher in DL, sufficiently so that soluble solids yield/ha was not significantly lower than other treatments. This occurred without a decrease in juice viscosity or consistency (Bostwick). Simple models were developed for predicting soil water deficit effects on fruit quality. There is clearly an opportunity for irrigation management to improve tomato processing quality and profitability.

scholarly journals Quality Parameter Levels of Strawberry Fruit in Response to Different Sound Waves at 1000 Hz with Different dB Values (95, 100, 105 dB)

Agronomy ◽  
2018 ◽  
Vol 8 (7) ◽  
pp. 127 ◽  
Author(s):  
Halil Ozkurt ◽  
Ozlem Altuntas
Keyword(s):  
Mechanical Stress ◽  
Defense Mechanism ◽  
Growth Parameters ◽  
Sound Intensity ◽  
Titratable Acidity ◽  
Quality Parameters ◽  
Soluble Solids ◽  
Sound Waves ◽  
Total Acid ◽  
Constant Frequency

All living organisms perceive mechanical signals, regardless of their taxonomic classifications or life habits. Because of their immobility, plants are influenced by a variety of environmental stresses, such as mechanical stress, during their growth and development. Plants develop physiological behaviors to adapt to their environment for long-term development and evolution. Sound-induced stress—an abiotic stress factor—is an example of mechanical stress and is caused by sound waves generated by different sources. This stress has a negative effect on the development and growth of plants. The strawberry plants evaluated in this study were exposed to three different sound intensity levels (95, 100, 105 dB) at a constant frequency of 1000 Hz. In strawberry plants, stress induced by sound waves is thought to trigger increased production of secondary metabolites as a defense mechanism. To determine the effect of sound applications, the fresh and dry weights of the roots and shoots were measured in strawberry plants, and the pH, total soluble solids (Brix), titratable acidity, vitamin C, total sugar, total acid, and total phenols were analyzed in the fruits. Results show that the sound stress, which was produced at a constant frequency (1000 Hz) and different sound levels (95, 100, 105 dB), affects the growth parameters of the plant and several quality parameters of the fruit.

scholarly journals Improving Growth, Yield, and Quality of Tomato Plants (Solanum lycopersicum L) by the Application of Moroccan Seaweed-Based Biostimulants under Greenhouse Conditions

Agronomy ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 1373
Author(s):  
Abir Mzibra ◽  
Abderrahim Aasfar ◽  
Mehdi Khouloud ◽  
Youssef Farrie ◽  
Rachid Boulif ◽  
...  
Keyword(s):  
Plant Growth ◽  
Fruit Quality ◽  
Growth Parameters ◽  
Growth Yield ◽  
Principal Component ◽  
Quality Parameters ◽  
Tomato Plants ◽  
Tomato Yield ◽  
Yield And Quality

Background: Seaweed-derived extracts have gained popularity in agriculture as bioproducts with phytostimulatory effects on plant growth and development. Methods: This study assessed the effect of polysaccharide-enriched extracts (PEEs) derived from six Moroccan seaweeds on tomato growth, yield, and fruit quality. PPEs were applied to tomato plants as soil drench in a greenhouse experiment. Growth parameters including plant height (cm) and number of leaves, flowers, and flower buds were recorded every 15 days. Yield and quality parameters of the harvested fruits were also recorded after each harvest. Results: The obtained results showed that all PEEs improved the growth, yield, and fruit quality of treated tomato plants. According to principal component analysis, the presence of SO4, galactose, glucose, and maltose in the characterized polysaccharides was closely associated with their effect on plant growth, yield, and fruit quality parameters. Conclusions: PEEs obtained from Gelidium crinale,Schizymenia dubyi, Fucus spiralis, and Bifurcaria bifurcata exhibited the highest biostimulant effects and could be used as bioproducts for improved tomato yield and fruit nutritional quality.

scholarly journals Expression of a Chimeric Tobacco Peroxidase Gene in Transgenic Tomato Plants

1992 ◽  
Vol 117 (6) ◽  
pp. 1012-1016 ◽  
Author(s):  
L. Mark Lagrimini ◽  
Jill Vaughn ◽  
John Finer ◽  
Karen Klotz ◽  
Patrick Rubaihayo
Keyword(s):  
Peroxidase Activity ◽  
Tomato Fruit ◽  
Cauliflower Mosaic Virus ◽  
Soluble Solids ◽  
Foreign Gene ◽  
Peroxidase Isoenzyme ◽  
Tomato Plants ◽  
Anionic Peroxidase ◽  
Peroxidase Gene ◽  
Tobacco Peroxidase

Tomato plants (Lycopersicon esculentum cv. OH 7814) were transformed via Agrobacterium tumefaciens with a chimeric tobacco anionic peroxidase (EC 1.11.1.7) gene joined to the cauliflower mosaic virus (CaMV) 35S promoter. Transgenic plants obtained by selection on kanamycin were found to have more than five times the total leaf peroxidase activity of control plants. Transformed tomato plants chronically wilted upon reaching sexual maturity. Two independently selected transformants were self-fertilized, and progeny were obtained that were homozygous for the foreign gene. Isoelectric focusing gels stained for peroxidase activity revealed a new tomato leaf peroxidase isoenzyme with a pI of 3.75, which is similar to that seen in Nicotiana sylvestris L. Mature tomato fruit were found to have up to 1600-fold higher peroxidase activity in transformants expressing the tobacco anionic peroxidase (TobAnPOD) than control plants. Tissue blots showed the tobacco enzyme evenly distributed throughout the tomato fruit tissue. Progeny plants possessing the tobacco peroxidase gene (now homozygous) showed stunting, and fruit size was reduced by >80%. However, fruit set was normal and the rate of ripening was not altered from control plants. Fruit from transformed plants were found to have normal pigmentation, but the soluble solids concentration was 400% higher than in control tomato fruit. This result was predicted from the peroxidase-induced water stress. Possible roles for the tobacco anionic peroxidase in growth, development, and stress resistance are discussed.

scholarly journals Non-destructive quality assessment of tomato fruit using differential absorbance technique

2020 ◽  
Vol 9 (2) ◽  
pp. 42-50
Author(s):  
MA Rahman ◽  
MN Islam ◽  
TAA Nasrin ◽  
MM Begum
Keyword(s):  
Ascorbic Acid ◽  
Tomato Fruit ◽  
Correlation Coefficients ◽  
Titratable Acidity ◽  
Quality Parameters ◽  
Soluble Solids ◽  
Chlorophyll Contents ◽  
Good Ability ◽  
The Difference ◽  
Non Destructive

A rapid and non-destructive assessment of quality parameters in tomatoes was evaluated using a portable differential absorbance (DA) meter in order to accurately establish optimum harvest maturity. A commercial tomato variety cv. ‘BARI Tomato-8’ grown in the summer season of Bangladesh was used in this study. Different quality parameters including fruit skin colour, tissue firmness, chlorophyll contents, ascorbic acid, total soluble solids (TSS), titratable acidity and pH of tomatoes were determined using standard reference methods. Correlation analysis was performed to determine the relationship between the difference in absorbance index (IDA) and fruit quality parameters. The correlation coefficients showed good ability in estimating the hue angle, chlorophyll contents, titratable acidity and firmness of tomatoes showing ‘r’ values of 0.93, 0.91, 0.91 and 0.92-0.94, respectively. However, the changes of ascorbic acid contents and TSS of tomatoes did not follow the linear model during fruit maturation. Thus, the DA meter could most accurately predict the major quality attributes and may be used as an efficient technique for in-plant non-destructive assessment of tomato fruit qualities. Int. J. Agril. Res. Innov. Tech. 9(2): 42-50, December 2019

scholarly journals Effect of Biocyclic Humus Soil on Yield and Quality Parameters of Processing Tomato (Lycopersicon esculentum Mill.)

2019 ◽  
Vol 76 (1) ◽  
pp. 47
Author(s):  
Lydia Dorothea EISENBACH ◽  
Antigolena FOLINA ◽  
Charikleia ZISI ◽  
Ioannis ROUSSIS ◽  
Ioanna TABAXI ◽  
...  
Keyword(s):  
Organic Matter ◽  
Quality Parameters ◽  
Soluble Solids ◽  
Tomato Plants ◽  
Processing Tomato ◽  
Yield And Quality ◽  
Randomized Design ◽  
Different Characteristics ◽  
Humus Soil

A field experiment was conducted to evaluate the effects of biocyclic humus soil, a newly found apparently carbon stabilized form of organic matter with significantly different characteristics from common composts or other forms of organic matter (humus), on yield and quality of processing tomato. The experiment was laid out in a completely randomized design with three replications and three fertilization treatments (untreated, inorganic fertilizer and biocyclic humus soil). The highest fruit yield (116.8 t/ha) was obtained by using biocyclic humus soil. There were no treatment effects on fruit firmness (4.34-4.60 kg/cm2), total soluble solids (4.29-4.76 °Brix) and total acidity (0.25-0.31 g citric acid/100 g fruit) content of fruits. In conclusion, the tomato plants grown in biocyclic humus soil had 45% more yield than in conventional plots, and this big difference is probably related to the fact that the humus soil as a substrate provides an optimum environment for plant growth.

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