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.

scholarly journals Relative humidity during cold storage on Postharvest quality of 'Niagara Rosada' table grapes

2015 ◽  
Vol 45 (3) ◽  
pp. 386-391 ◽  
Author(s):  
Josuel Alfredo Vilela Pinto ◽  
Márcio Renan Weber Schorr ◽  
Fabio Rodrigo Thewes ◽  
Deiverson Luiz Ceconi ◽  
Vanderlei Both ◽  
...  
Keyword(s):  
Weight Loss ◽  
Relative Humidity ◽  
Shelf Life ◽  
Cold Storage ◽  
Titratable Acidity ◽  
Soluble Solids ◽  
Postharvest Quality ◽  
Table Grapes ◽  
Niagara Rosada

This study aimed to evaluate the effect of different levels of relative humidity (RH) on the maintenance of Postharvest quality of 'Niagara Rosada' table grapes after cold storage at 0.5°C for 21 days. A completely randomized design was used, with five replicates of 18 clusters per treatment. The selected levels of relative humidity were 85, 90, 95 and 100%, obtained by means of electronic humidity controllers. The fruits were evaluated in relation to rot incidence, berry cracking, browning rate, respiratory rate, titratable acidity, soluble solids, resistance to abscission, berry drop and weight loss. The evaluations were assessed at 20 days of storage and after two and four days of shelf-life (20°C; 85% RH). The results showed that as higher as relative humidity, higher is rot incidence and that the variables rachis browning and weight loss were inversely related to relative humidity. Resistance to abscission at the end of storage was higher when humidity ranged between 90 and 95%, but it was not affected after transfer to shelf-life from cold storage. Relative humidity ranging between 90 and 95% offer the best conditions to maintain the Postharvest quality of 'Niagara Rosada' table grapes

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 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 Postharvest Quality of Dragon Fruit (Hylocereus spp.) after X-ray Irradiation Quarantine Treatment

HortScience ◽  
2008 ◽  
Vol 43 (7) ◽  
pp. 2115-2119 ◽  
Author(s):  
Marisa M. Wall ◽  
Shakil A. Khan
Keyword(s):  
Titratable Acidity ◽  
Soluble Solids ◽  
Postharvest Quality ◽  
X Ray ◽  
Irradiation Treatment ◽  
Dragon Fruit ◽  
Fruit Decay ◽  
Irradiation Stress ◽  
Solids Content

The quality of three dragon fruit clones (Hylocereus spp.) was determined after x-ray irradiation for disinfestation of quarantine pests. Fruit were treated with irradiation doses of 0, 200, 400, 600, or 800 Gy and stored for 12 days at 10 °C. Irradiation did not affect soluble solids content, titratable acidity, or fructose concentrations. Glucose, sucrose, and total sugar concentrations decreased linearly as dose increased. Minimal softening occurred in the outer flesh layers for fruit treated with 400 or 600 Gy irradiation. Surface color, peel injury, and bract appearance differed among the three clones with irradiation stress, but in all cases, visible changes were minor. Fruit decay was absent or minimal, and disease ratings were not affected by irradiation. Irradiation treatment of dragon fruit at doses 800 Gy or less would ensure visual and compositional quality while providing quarantine security.

scholarly journals Postharvest Quality of Grape Tomatoes Treated with 1-Methylcyclopropene at Advanced Ripeness Stages

HortScience ◽  
2006 ◽  
Vol 41 (1) ◽  
pp. 183-187 ◽  
Author(s):  
Muharrem Ergun ◽  
Steven A. Sargent ◽  
Donald J. Huber
Keyword(s):  
Ethylene Production ◽  
Titratable Acidity ◽  
Soluble Solids ◽  
Postharvest Quality ◽  
Fruit Firmness ◽  
Soluble Solids Content ◽  
Respiration Rates ◽  
Total Titratable Acidity ◽  
Solids Content

Grape tomatoes (Lycopersicon esculentum Mill. `Santa') harvested at light-red (>90% color) and full-red stages were treated with 1 μL·L–1 1-methylcyclopropene (1-MCP) for 24 hours at 20 °C and stored at 20 °C. After 1 day of storage, fruit harvested at light-red stage treated with 1-MCP had a 56% lower respiration rate than untreated fruit. By day 7, respiration rates of the two treatments had converged at about 2 mL·kg–1·h–1. Ethylene production of light-red stage tomatoes treated with 1-MPC was 24% lower than untreated during storage, with rates converging by day 11. For fruit harvested full-red, 1-MCP had similar effects on respiration and ethylene production, although convergence occurred earlier, by day 5. Subsequent tests were conducted only with fruit harvested at full-red stage, since fruit harvested at the light-red stage had lower soluble solids content (4.3%) than fruit harvested at the full-red stage (5.5%). Several combinations of 1-MCP concentrations and exposure times were applied at 20 °C: 1 μL·L–1 for 24 h, 5 μL·L–1 for 6 or 12 h, 25 μL·L–1 for 6 or 12 h, and 50 μL·L–1 for 6 or 12 h; following the respective pretreatment fruits were stored at 20 °C. 1-MCP pretreatment extended marketable life by 1 d, irrespective of pretreatment regime, where untreated and pretreated fruit remained marketable (<15% of fruit soft, decayed and/or shriveled) for 6 and 7 d, respectively. However, 1-MCP did not affect whole fruit firmness, epidermal color, internal color, soluble solids content (6.5%), total titratable acidity (0.64%), or pH (4.3). In a third test simulating commercial handling procedures, full-red harvested tomatoes were treated with 1 μL·L–1 1-MCP for 24 h at either 13 or 20 °C, stored for 4 d at 13 °C, and then transferred to 20 °C. Under these conditions, marketable life for untreated and 1-MCP-treated tomatoes was 7 and 8 d, respectively.

scholarly journals Postharvest Quality of Lychee Fruit: Role of Relative Humidity and Panicle

HortScience ◽  
1997 ◽  
Vol 32 (3) ◽  
pp. 433D-433
Author(s):  
T. Vilasachandran ◽  
Steven A. Sargent
Keyword(s):  
Weight Loss ◽  
Relative Humidity ◽  
Titratable Acidity ◽  
Soluble Solids ◽  
Postharvest Quality ◽  
Hue Angle ◽  
Pericarp Color ◽  
Pericarp Browning

Pericarp browning, weight loss, and the associated quality deterioration are the unsolved postharvest problems of lychee (Litchi chinensis Sonn.). Freshly harvested fruits (`Brewster') were stored ± plastic wrap (99% and 84% relative humidity, RH, respectively) and ± panicle at 5°C for 18 days to simulate commercial handling scenarios. There were no significant losses in pericarp color (L*, hue angle, chroma value), total soluble solids, and total sugars from initial values for wrapped fruits. Wrapped lychees were 100% marketable, compared to 17% for unwrapped fruits. The former retained higher weight, moisture content and total titratable acidity (TTA, pulp), and lower pulp pH. Colletotrichum sp., Cladosporium sp., and Alternaria sp. caused decay in 56% of unwrapped fruits, whereas wrapped fruits were free of decay. Fruits with panicles had significantly higher weight loss (3%) than clipped fruits for both wrapped and unwrapped fruits. Pulp TTA tended to decrease and pH to increase more in fruits with panicle. Postharvest quality of lychee fruits was significantly extended by removing the panicle and maintaining nearly saturated RH during handling and storage.

scholarly journals Comparison of Regular Atmospheric Storage versus Modified Atmospheric Packaging on Postharvest Quality of Organically Grown Lowbush and Half-Highbush Blueberries

2018 ◽  
Vol 10 (11) ◽  
pp. 3916 ◽  
Author(s):  
Angela Koort ◽  
Ulvi Moor ◽  
Priit Põldma ◽  
Clive Kaiser ◽  
Marge Starast
Keyword(s):  
Anthocyanin Biosynthesis ◽  
Titratable Acidity ◽  
Soluble Solids ◽  
Postharvest Quality ◽  
Highbush Blueberry ◽  
Lowbush Blueberry ◽  
Highbush Blueberries ◽  
Solids Content ◽  
Organically Grown

The aim of the study was to determine the effect of modified atmosphere (MA) packages on the external quality of organically grown lowbush blueberry and half-highbush blueberry (’Northblue’) and the nutritional value of the fruits. Fruits were divided into plastic punnets and stored as follows: regular atmosphere (RA), punnets without packing; punnets sealed in a low-density polyethylene (LDPE, Estiko) bag; punnets sealed in an Xtend® blueberry bag (Stepac). Fruits were stored at 3 ± 1 °C. Compared to RA conditions, the Xtend® package prolonged the postharvest life for 15 days for lowbush and 9 days for half-highbush blueberries. Fruit dry matter (DM) and titratable acidity (TA) were higher in the Xtend® package. Fruit SSC decreased in the LDPE packages and increased in the Xtend® packages during storage. Based on the decreased soluble solids content (SSC) and titratable acidity (TA) ratio (SSC:TA) values during storage, it can be concluded that the taste of the fruits became sourer in all packages. Anthocyanin biosynthesis of lowbush blueberries was suppressed in MA, but this effect was not noticed for ‘Northblue’. Regarding fruit firmness, shrivelling, and decay, there were significant differences between the MA packages, but the genetic differences were more important: half-highbush blueberry fruits were firmer and less shrivelled.

scholarly journals Effect Of Storage Periods On Postharvest Quality Of Pumpkin

2013 ◽  
Vol 38 (2) ◽  
pp. 247-255 ◽  
Author(s):  
MA Rahman ◽  
M Miaruddin ◽  
MHH Khan ◽  
MAT Masud ◽  
MM Begum
Keyword(s):  
Ph Value ◽  
Storage Period ◽  
Titratable Acidity ◽  
Storage Conditions ◽  
Soluble Solids ◽  
Postharvest Quality ◽  
Research Centre ◽  
Maximum Loss ◽  
Solids Content

The fully matured pumpkins (Cucurbita moschata Poir) of BARI Pumpkin-1 and BARI Pumpkin-2 were harvested from the experimental field of Horticulture Research Centre, BARI, Gazipur, Bangladesh. They were then stored under ambient room conditions (27-31 °C and 75-90% RH) for various periods ranged from 15 days to 120 days. The effect of different storage periods was assessed by evaluating their impact on changes in quality attributes of pumpkins. Results indicated that a slow but steady weight loss occurred in pumpkin with maximum loss of 18 and 21% after 120 days of storage in BARI Pumpkin-1 and BARI Pumpkin-2, respectively. ?-carotene and ascorbic acid contents were decreased throughout the whole storage time, however, they were drastically reduced during first 30 days of storage. Total soluble solids content increased until 45 days of storage followed by a decrease with progress in time. Titratable acidity was slowly decreased and simultaneously pH value was increased throughout the storage period. The results indicated that storage conditions need to be managed carefully to slow down any changes in fresh pumpkin. Bangladesh J. Agril. Res. 38(2): 247-255, June 2013 DOI: http://dx.doi.org/10.3329/bjar.v38i2.15888

scholarly journals Storage Temperature Influences Postharvest Quality of Wild Plum (Ximmenia Americana L.) Fruit

2019 ◽  
Vol 60 (2) ◽  
pp. 1-10
Author(s):  
V. E. Emongor ◽  
G. Ramagonono
Keyword(s):  
Weight Loss ◽  
Vitamin C ◽  
Storage Temperature ◽  
Chilling Injury ◽  
Fruit Weight ◽  
Soluble Solids ◽  
Postharvest Quality ◽  
Soluble Solids Content ◽  
Solids Content

Wild plum has many medicinal, therapeutic and nutritive uses, but its fruits are collected in the wild and less researched. The aim of this study was to evaluate the effects of storage tem­perature on postharvest fruit quality of wild plum. The fruits of wild plum were subjected to different storage treatments at 0, 5, 10 and 15 ± 1°C in a completely randomized design. The results showed that as storage temperature decreased below 15°C, the incidence and severity of chilling injury significantly (p<0.05) increased. As storage temperature increased from 0 to 15°C fruit titratable acidity (TTA) and vitamin C content significantly (p< 0.05) decreased, but juice pH, soluble solids content (SSC) and weight loss significantly (p< 0.05) increased. The decrease in TTA and vitamin C content, and increase in SSC and juice pH was attributed to fruit ripening. The increase in fruit weight loss was attributed to higher transpiration and respiration. It was concluded that to extend the storage-life and marketing period of wild plum fruits, the fruits should be stored at 15°C and 90-95% RH. Keywords: Ximenia americana, Chilling injury and incidence, Vitamin C, Soluble solids content, Acidity

scholarly journals NITROGEN FERTILIZER EFFECT ON POSTHARVEST QUALITY OF `ARAPAHO' THORNLESS BLACKBERRY FRUIT

HortScience ◽  
1996 ◽  
Vol 31 (5) ◽  
pp. 760a-760 ◽  
Author(s):  
Victorine Alleyne ◽  
John R. Clark
Keyword(s):  
Titratable Acidity ◽  
Soluble Solids ◽  
Postharvest Quality ◽  
Acid Ratio ◽  
Fruit Samples ◽  
Thornless Blackberry ◽  
Solids Content ◽  
N Rates ◽  
Fertilizer Effect

An investigation was conducted in 1994 and 1995 to evaluate the effect of N rate and timing of application on postharvest performance of `Arapaho' thornless blackberry fruit. Treatments were 0 kg N/ha, 56 kg N/ha, 112 kg N/ha single application, and 112 kg N/ha split application. The N source was ammonium nitrate. Fruit samples were hand-harvested and stored for 0–8 days. In general, `Arapaho' fruit quality was not affected by N applications. Increasing N rates increased soluble solids content but had no effect on pH, titratable acidity, sugar: acid ratio, total solids, firmness, and weight loss. Nitrogen applications increased fruit N content.

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