Effect of Preharvest Application of Silicon and Saline Water on Postharvest Quality of Beet (Beta vulgaris L.)

2019 ◽  
pp. 1-9
Author(s):  
José Sebastião de Melo Filho ◽  
Toshik Iarley da Silva ◽  
Ygor Henrique Leal ◽  
Ana Gabriela Sousa Basilio ◽  
Mário Leno Martins Véras ◽  
...  
Keyword(s):  
Irrigation Water ◽  
Saline Water ◽  
Titratable Acidity ◽  
Dry Mass ◽  
Soluble Solids ◽  
Postharvest Quality ◽  
Total Soluble Solids ◽  
Randomized Design ◽  
Saline Waters

Beet is one of the vegetables richest in nutrient (bioactive compounds, folic acid and potassium). However, there are few studies on postharvest quality from the crop under irrigation conditions with saline waters, and because of that, the objective of this study was to evaluate effect of saline waters and silicon application in the preharvest on physicochemical quality of the beet. Two experiments were conducted with the objective of evaluating two forms of silicon application: via foliar (experiment 1) and via soil (experiment 2) about its influence in mitigating salt stress. In both experiments was adopted a randomized design with blocks in a 5 x 5 factorial, referring to five levels of electrical conductivity of the irrigation water (ECw): (0.5, 1.3, 3.25, 5.2 and 6.0 dS m-1) five doses of silicon (0.00; 2.64; 9.08; 15.52 and 18.16 mL L-1), they were combined according to the experimental matrix Central composite of Box totaling 10 treatments, with four replicates and three plants per plot. After harvesting, 70 days after transplanting, the following characteristics were evaluated: bulb dry mass, pH, titratable acidity (TA), total soluble solids (TSS), TSS/TA ratio and ash.  There was a significant effect for the salinity x silicon (Si) interaction applied via soil to the dry matter mass and titratable acidity. The electrical conductivities of irrigation water (ECw) and Si doses via leaf and soil influenced significantly for analyzed variables, except pH, total soluble solids, TSS/TA ratio, ash and titratable acidity, which were not influenced by ECw and nor by the doses of Si via soil and foliage. Irrigation with water of 6.0 dS m-1 promotes better quality beet tuber. The fertilization on preharvest with silicon via soil or foliage improved postharvest quality of beet.

scholarly journals Postharvest Quality of Beetroots Grown Under Different Irrigation Depths and Ascorbic Acid Doses

2019 ◽  
Vol 11 (16) ◽  
pp. 180
Author(s):  
Anderson Carlos de Melo Gonçalves ◽  
Toshik Iarley da Silva ◽  
José Sebastião de Melo Filho ◽  
Joana Gomes de Moura ◽  
Leonardo Vieira de Sousa ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Ascorbic Acid ◽  
Polynomial Regression ◽  
Titratable Acidity ◽  
Soluble Solids ◽  
Postharvest Quality ◽  
Mineral Matter ◽  
Total Soluble Solids ◽  
Randomized Design

Beetroot (Beta vulgaris L.) is a culture of great demand in Brazil due to its high nutritional value. However, water availability is a determining factor on its production. An alternative to reduce the damage caused by water stress is to apply organic solutes, such as ascorbic acid. The purpose hereof was to evaluate the postharvest quality of beetroots grown under different irrigation depths and ascorbic acid doses. The experiment was carried out in the Human, Social, and Agricultural Center’s Postharvest Physiology and Technology Laboratory of the Federal University of Paraíba, Bananeiras, Paraíba, Brazil, in a completely randomized design with five doses of ascorbic acid (0.00, 0.29, 1.00, 1.71, and 2.00 mM) and five irrigation depths (40.0%, 51.6%, 80.0%, 108.4%, and 120.0% of the evapotranspiration), combined according to each Box Central Compound experimental matrix, totaling nine treatments with five repetitions. The variables total soluble solids, electrical conductivity, hydrogenation potential, titratable acidity, total soluble solids and titratable acidity ratio, moisture, dry matter, and mineral matter were evaluated. The data were submitted for analysis of variance and polynomial regression. There was a significant interaction between the irrigation depths and the ascorbic acid doses in every variable, except for electrical conductivity and mineral matter. The postharvest characteristics of beetroots improved with applications of ascorbic acid doses in the thinner irrigation depths. The greatest dose of ascorbic acid (2 mM) in the thinner irrigation depth (40%) increases the postharvest quality of beet tuberous roots.

scholarly journals Silicon Potential as Attenuator of Salinity Effects on Growth and Post-harvest Quality of Lettuce

2018 ◽  
Vol 10 (7) ◽  
pp. 455
Author(s):  
Hozano De Souza Lemos Neto ◽  
Marcelo De Almeida Guimarães ◽  
Rosilene Oliveira Mesquita ◽  
Italo Marlone Gomes Sampaio ◽  
Ana Régia Alves de Araújo Hendges ◽  
...  
Keyword(s):  
Plant Growth ◽  
Titratable Acidity ◽  
Dry Mass ◽  
Soluble Solids ◽  
Saline Stress ◽  
Post Harvest ◽  
Randomized Design ◽  
Salinity Levels ◽  
Completely Randomized Design

Silicon (Si) is a mineral element that provides many benefits to plants and may also assist in tolerance to abiotic stresses such as salinity. The aim of the study was to evaluate the use of Si as a possible attenuator of the deleterious effects of salinity on growth and post-harvest of lettuce. A completely randomized design with four replicates was performed in a 3 × 2 factorial, consisting of three salinity levels (1.65, 3.65, 7.65 dS m-1) and two levels of silicon (0.0 and 2.0 mM). Salinity reduced all variables related to plant growth. For shoot fresh and dry mass, it was observed that NaCl caused a reduction of 79.80 and 80%, respectively, in comparison to the control. However, parameters related to post-harvest such as titratable acidity, soluble solids and vitamin C increased with salinity. Although not effective in reducing saline stress on plant growth, Si provided improvements in the variables related to lettuce post-harvest. Salinity significantly reduced plant growth in the presence and absence of Si, but provided better post-harvest quality with Si.

scholarly journals Postharvest Quality of Tommy Atkins Mangoes Coated With Cassava Starch and Chitosan-Based Coatings

2018 ◽  
Vol 10 (11) ◽  
pp. 401
Author(s):  
T. A. Oliveira ◽  
C. A. Paiva ◽  
A. C. Silva ◽  
L. V. Nascimento ◽  
R. H. L. Leite ◽  
...  
Keyword(s):  
Weight Loss ◽  
Reducing Sugars ◽  
Soluble Sugars ◽  
Titratable Acidity ◽  
Cassava Starch ◽  
Soluble Solids ◽  
Postharvest Quality ◽  
Total Soluble Sugars ◽  
Randomized Design

This study aimed to evaluate postharvest quality of Tommy Atkins mangoes treated with starch cassava and chitosan based coatings. Mango fruits were collected at physiological maturity. After cleaning, weighing and identification, fruits were submitted to the respective treatments and stored for 35 days in the Laboratório de Tecnologia de Alimentos, with weekly evaluations under refrigeration 13±1 ºC and 90±5% RH. The experiment was conducted in a completely randomized design, in factorial scheme with four treatments: control, cassava starch (CS), chitosan (CH), and cassava starch/chitosan (CS/CH) at a concentration of 2%, and six storage periods (0, 7, 14, 21, 28 and 35 days) with four replications. Fruits were evaluated in: appearance, weight loss, external color: luminosity and ΔE, pulp firmness, titratable acidity, soluble solids content, starch, total soluble sugars, reducing sugars and sucrose. Data were submitted to analysis of variance using SISVAR software and compared by Scott-Knott test at 5% of probability. It was observed a reduction in appearance, pulp firmness, titratable acidity, starch and reducing sugars and increase in weight loss, luminosity, ΔE, soluble solids, total soluble sugars and non-reducing sugars during storage. CS/CH coated fruits reported higher notes of appearance, lower weight loss and maintained color. Quality of physicochemical attributes: soluble solids, starch, total soluble sugars, reducing sugars and non-reducing sugars were strongly retarded.

scholarly journals Can silicon (Si) influence growth, physiology and postharvest quality of lettuce?

2020 ◽  
pp. 71-77
Author(s):  
Hozano de Souza Lemos Neto ◽  
Marcelo de Almeida Guimarães ◽  
Italo Marlone Gomes Sampaio ◽  
Janiquelle da Silva Rabelo ◽  
Caris dos Santos Viana ◽  
...  
Keyword(s):  
Essential Element ◽  
Titratable Acidity ◽  
Dry Mass ◽  
Fresh Mass ◽  
Soluble Solids ◽  
Postharvest Quality ◽  
Hydroponic System ◽  
Growth Physiology ◽  
Pests And Diseases ◽  
Randomized Design

Although it is not considered an essential element for plants, silicon (Si) provides benefits for several species, especially grasses, such as increase in yield and resistance to pests and diseases, reducing the effects of salt and water stress, among others. The aim of this study was to evaluate the effect of silicon on the performance of lettuce in hydroponic system. The experiment was carried out in a completely randomized design, with five doses of silicon (0, 2, 4, 6, 8 mM) in the nutrient solution. Shoot fresh and dry mass, gas exchanges, photosynthetic pigments and post-harvest were evaluated. It was observed that from the dose of 2 mM, there was a reduction in most variables. The dose of 0.4 mM [(-0.572)/(2*-0.7055)] provided a greater increase in shoot fresh mass. The highest photosynthetic rate was at the dose of 3.19 mM. Soluble solids, titratable acidity and pH were higher at the 4 mM dose. Silicon provides better lettuce production, with a dose of 0.4 mM allowing a greater shoot fresh mass, being the most indicated for lettuce cultivation in hydroponic system.

scholarly journals Physicochemical and enzimatic transformations of "eva" apples stored under modified atmosphere

2014 ◽  
Vol 38 (4) ◽  
pp. 375-381
Author(s):  
Ariela Betsy Thomas ◽  
Caroline Roberta Freitas Pires ◽  
Luiz Carlos de Oliveira Lima
Keyword(s):  
Titratable Acidity ◽  
Soluble Solids ◽  
Low Density Polyethylene ◽  
Postharvest Quality ◽  
Experimental Unit ◽  
Modified Atmosphere ◽  
Low Density ◽  
Randomized Design ◽  
The City

The need for a permanent market supply of fresh fruit has generated great interest in postharvest techniques that can promote useful life and quality of the fruit. The aim of this study was to evaluate the efficiency of atmospheric modification using different polymeric films in maintaining postharvest quality and prolonging the shelf life of Eva (Mallus sp) apples. For this, fruits from the city of Barbacena - MG, selected and sanitized were packed in plastic trays and wrapped in the corresponding films. The films used were: polypropylene - 20 µm, low-density polyethylene - 14 µm and high-density polyethylene - 7 µm. Another group of fruits (control) was not submitted to a modified atmosphere. Subsequently, all the the packages were stored under refrigeration (0 ° C ± 0.5) for 210 days and the evaluations of the following variables were performed every 30 days of storage: hydrogen potential (pH), titratable acidity, soluble solids, weight loss, firmness, total pectin, soluble pectin, pectin methyl esterase and polygalacturonase. The work was conducted in a completely randomized design (4x8), with 4 treatments and 8 experimental times. Each treatment consisted of three replicates and each experimental unit consisted of six fruits. The results were submitted to variance analysis and means were compared by the Tukey test at 5% probability and regression analysis. The low density polyethylene (14 µm) packaging provided the best conservation of the Eva cultivar apple textural characteristics.

scholarly journals Potassium and growth-promoting fungi improve the postharvest quality of grape tomato

2022 ◽  
Vol 43 (2) ◽  
pp. 675-692
Author(s):  
Deise Silva Castro Pimentel Cardoso Cardoso ◽  
◽  
Herminia Emilia Prieto Martinez ◽  
Ariana Mota Pereira ◽  
Maria Catarina Megumi Kasuya ◽  
...  
Keyword(s):  
Vitamin C ◽  
Titratable Acidity ◽  
Fruit Production ◽  
Soluble Solids ◽  
Postharvest Quality ◽  
Tomato Plants ◽  
Randomized Design ◽  
Growth Promoting ◽  
Low K

Tomato plants respond well to potassium fertilization, whose insufficiency leads to a drop in fruit production and quality. On the other hand, the association of growth-promoting fungi (GPF) with roots has been shown to be able to optimize nutrient absorption, which implies lower financial costs and a decreased risk of loss of K applied to the soil. The objective of this study was to investigate the effects of inoculation with GPF and K rates on the postharvest quality of grape tomato hybrid ‘Mascot’ grown in a hydroponic system. The plants were cultivated in a hydroponic drip system using washed and sterilized sand as substrate. They were trained with two stems, leaving three bunches per stem. The experiment was carried out in a splitsplit-plot arrangement in a completely randomized design with three replicates. Ripe fruits were stored for 30 days in PET containers in storage chambers at a temperature of 25 °C. After 0, 10, 20 and 30 days of storage, five fruits were collected to determine the titratable acidity (TA) and soluble solids (SS), reducing sugars (RS) and vitamin C contents. The K rates provided an increase in the quality attributes. At low K rates, inoculation with GPF led to higher TA, SS, RS and vitamin C values. Inoculation of the plants with GPF improved the postharvest preservation of the fruits, especially when the plants underwent nutritional stress during cultivation.

scholarly journals Postharvest quality of tomato as affected by nitrogen and sulfur interaction

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.

scholarly journals Potential of Postharvest Coatings to Maintain Freshness of Red-Fleshed Pitaya (Hylocereus costaricensis)

Agriculture ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 892
Author(s):  
Nur Azlin Razali ◽  
Steven A. Sargent ◽  
Charles A. Sims ◽  
Jeffrey K. Brecht ◽  
Adrian D. Berry ◽  
...  
Keyword(s):  
Weight Loss ◽  
Tap Water ◽  
Titratable Acidity ◽  
Quality Parameters ◽  
The Other ◽  
Soluble Solids ◽  
Postharvest Quality ◽  
Quality Factors ◽  
Climacteric Fruit

Pitaya is a non-climacteric fruit that has white or red flesh with numerous small, black seeds. It has a high moisture content; however, water loss during handling and storage negatively affects the fresh weight, firmness and appearance of the fruit, decreasing market value. Application of compatible postharvest coatings has been shown to benefit postharvest quality of many crops. The objective of this study was to evaluate the effect of two commercial coatings on weight loss and quality of pitaya during storage. Pitaya fruit were commercially harvested and sorted for uniformity of size and freedom from defects. Fruit were briefly immersed in either a vegetable oil-based coating (VOC; Sta-Fresh® 2981) or a carnauba-based coating (CC; Endura-Fresh™ 6100) according to manufacturer’s recommendations. Fruit immersed in tap water served as a control. Fruit were fan-dried at room temperature for 20 min, then stored at 7 °C with 85% relative humidity (RH) and evaluated for selected physical quality parameters each 5 days during 20 days. After each evaluation, fruit were peeled and frozen for later analysis of soluble solids content (SSC), total titratable acidity (TTA); on day 15 fresh samples were evaluated by an untrained consumer sensory panel. CC prevented exocarp shriveling for 15 days of storage, compared to uncoated pitaya (16.3% area affected); shriveling in VOC was intermediate and not significantly different from the other treatments. Mesocarp firmness remained constant throughout 15 days of storage regardless of treatment. Fruit exocarp h* angle increased slightly by day 20, becoming slightly less red, and there were no negative treatment effects for the other quality factors measured: SSC (11.33%), TTA (0.25%), weight loss (5.5%) or sensory evaluations (appearance, flavor, texture, firmness, and juiciness). After 20 days storage, appearance for fruit from all treatments was rated unacceptable due to development of anthracnose lesions. It was concluded that both CC and VOC maintained quality of pitaya for 15 days at 7 °C and 85% RH by delaying exocarp shriveling.

scholarly journals Post-harvest quality of Campomanesia adamantium (Cambess.) O. Berg. in function of storage temperature

2020 ◽  
Vol 43 ◽  
pp. e48979
Author(s):  
Marília Assis do Santos ◽  
Alan Carlos Costa ◽  
Clarice Aparecida Megguer ◽  
Júlien da Silva Lima ◽  
Yasmin Giovanna Santos Carvalho ◽  
...  
Keyword(s):  
Visual Analysis ◽  
Storage Temperature ◽  
Titratable Acidity ◽  
Soluble Solids ◽  
Maturity Stage ◽  
Post Harvest ◽  
Fruit Species ◽  
Randomized Design ◽  
Soluble Solid

Brazil has a large variety of native and exotic fruit species, including the gabiroba, which can be sources of income for the population. The objective of this study was to evaluate the post-harvest behavior of gabiroba fruit by maturity stage and storage temperature. The fruits were divided into two lots and stored at temperatures of 6, 12, 24 and 30°C. The first batch was used for the physical and chemical analysis of acidity, soluble solids, firmness, percentage of green color, and visual analysis; this batch was composed of green and yellow-green fruit. The second lot was intended for breath analysis, composed of green, yellow-green, and yellow fruits. The experiment was conducted in a completely randomized design with five replications. Data were analyzed using descriptive statistics. Considering the evaluated characteristics, the gabiroba soluble solid/titratable acidity ratio values should be approximately 4.0 for the fruits to be considered acceptable for consumption. For the preservation of the post-harvest quality of gabiroba, it is indicated that the harvest is carried out at the green stage of maturation and that they are stored at a temperature of 6°C. The highest respiratory rates were observed in fruits harvested at the yellow stage, not being recommended its storage.

scholarly journals Products of Lactobacillus delbrueckii subsp. bulgaricus Strain F17 and Leuconostoc lactis Strain H52 Are Biopreservatives for Improving Postharvest Quality of ‘Red Globe’ Grapes

2020 ◽  
Vol 8 (5) ◽  
pp. 656 ◽  
Author(s):  
Xiang Fang ◽  
Qinchun Duan ◽  
Zhuo Wang ◽  
Fuyun Li ◽  
Jianxiong Du ◽  
...  
Keyword(s):  
Weight Loss ◽  
Decay Rate ◽  
Titratable Acidity ◽  
Inhibitory Effect ◽  
Lactobacillus Delbrueckii ◽  
Soluble Solids ◽  
Postharvest Quality ◽  
Table Grapes ◽  
Solids Content

‘Red Globe’ table grapes are large, edible, seeded fruit with firm flesh that tastes good, but can have poor postharvest shelf-life. This study was conducted to explore the effects of products of Lactobacillus delbrueckii subsp. bulgaricus strain F17 and Leuconostoc lactis strain H52 on ‘Red Globe’ table grapes for the enhancement of shelf-life and improvement of grape quality characteristics during postharvest storage. Strains F17 and H52 were isolated from traditional fermented yak milk obtained in the Qinghai–Tibetan Plateau. Samples from untreated and treated grapes were analyzed for physicochemical, biochemical, and microbiological properties (weight loss, decay rate, pH, total soluble solids content, titratable acidity, total phenols, sensory evaluation, and microbial growth) for 20 days. The results demonstrated that supernatants from both strains significantly reduced weight loss, decay rate, aerobic mesophilic bacteria, and coliform bacteria counts; delayed maturity and senescence of table grapes; and reduced titratable acidity and total phenols. However, the supernatant of strain F17 was more effective and resulted in better sensory evaluations and had a significant inhibitory effect on yeast and molds by day 5. Meanwhile, the supernatant from strain H52 had a significant inhibitory effect on fungi over the whole storage period. In addition, the results of the Pearson correlation analysis suggested that weight loss, decay rate, total soluble solids content, and microorganisms were highly correlated with the sensory evaluation data and quality of postharvest grapes when treated with the products of strain F17. On the basis of these data and sensory organoleptic qualities, the supernatant containing products from strain F17 had the best potential as a biopreservative to improve the postharvest quality of ‘Red Globe’ table grapes.

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