Physiological and Quality Responses of `Bartlett' Pears to Reduced O2 and Enhanced CO2 Levels and Storage Temperature

`Bartlett' pears (Pyrus communis L.) tolerated up to 10 days of exposure to atmospheres containing 1.0%, 0.5%, or 0.25% O2 at 0, 5, or 10C without any detrimental effects on their quality attributes. The fruits also tolerated 4 to 6 days of exposure to air enriched with 20%, 50%, or 80% CO2 at the three temperatures. The beneficial effects of exposures to the O2-reduced or CO2-enriched atmospheres included reduction of respiration and ethylene production rates and retardation of skin yellowing and flesh softening. While 1.0% or 0.5% O2 and 20% CO2 did not increase ethanol and acetaldehyde contents, 0.25% O2 slightly increased and 50% or 80% CO2 dramatically increased the contents of these two volatiles in juice of the fruits. The effects of low O2 or high CO2 on the above attributes generally became more pronounced at the higher temperatures. The low O2 or high CO2 treatments did not significantly affect either soluble solids content or titratable acidity. Low O2 did not influence, but high CO2 slightly increased pH of the fruits.

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

HortScience ◽

10.21273/hortsci.41.1.183 ◽

2006 ◽

Vol 41 (1) ◽

pp. 183-187 ◽

Cited By ~ 10

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.

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Improvement of Storability and Shelf-life of ‘Blackamber’ Plums Treated with 1-methylcyclopropene

Food Science and Technology International ◽

10.1177/1082013206069909 ◽

2006 ◽

Vol 12 (5) ◽

pp. 437-443 ◽

Cited By ~ 15

Author(s):

A. P. Candan ◽

J. Graell ◽

C. Crisosto ◽

C. Larrigaudière

Keyword(s):

Shelf Life ◽

Ethylene Production ◽

Chilling Injury ◽

Titratable Acidity ◽

Soluble Solids ◽

Quality Changes ◽

Soluble Solids Content ◽

Life Changes ◽

Flesh Colour ◽

Solids Content

Rapid softening is one of the most important factors that limits the market life of plums. To avoid this problem, ‘Blackamber’ plums were treated with 0, 150, 300 and 600ppb of 1-methylcyclopropene (1- MCP) and their quality evaluated after 15, 30 and 50 days of storage at 0°C, immediately and after 6 days at 25°C. 1-MCP treatment effectively decreased ethylene production during storage and shelf-life in fruits kept 15 and 30 days at 0°C. In contrast, fruits kept for 50 days at 0°C showed a significant increase in ethylene production during shelf-life. Changes in ethylene production by 1-MCP were associated with a decrease of firmness loss and maintenance of titratable acidity but not with the development of red flesh colour. Soluble solids content of the fruit was not affected by the 1-MCP treatment. In this assay no significant symptoms of chilling injury (CI) or rot were observed. Overall, the results presented in this assay ascertained ethylene on quality changes in ‘Blackamber’ plums. They also showed that 1- MCP could be considered commercially to improve the storage life and resistance to mechanical bruising in ‘Blackamber’ plums without prejudicial effects on quality.

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Postharvest properties of sweet cherry fruit depending on rootstock and storage conditions

Folia Horticulturae ◽

10.1515/fhort-2017-0011 ◽

2017 ◽

Vol 29 (2) ◽

pp. 113-121 ◽

Cited By ~ 2

Author(s):

Ewa Dziedzic ◽

Jan Błaszczyk ◽

Elżbieta Kaczmarczyk

Keyword(s):

Sweet Cherry ◽

Storage Temperature ◽

Storage Period ◽

Storage Conditions ◽

Quality Parameters ◽

Soluble Solids ◽

Soluble Solids Content ◽

Fruit Storage ◽

Solids Content ◽

And Storage

ABSTRACT‘Regina’ sweet cherry fruit (Prunus avium L.) harvested from trees grown on vigorous and semi-dwarfing rootstocks was stored in normal atmosphere (NA) at 8°C and 2°C, and in a controlled atmosphere (CA) 3% O2 + 5% CO2at 2°C for two weeks. At harvest time, the fruits differed in the measured quality parameters (firmness, soluble solids content - SSC, titratable acidity - TA) depending on the rootstock. The storage conditions and the rootstocks significantly influenced the fruit quality parameters after storage. Generally, reduced fruit firmness and TA, and higher SSC and SSC/TA ratio were observed at the end of the storage period. Among the rootstocks, the lowest soluble solids content was found in the fruit from trees on the vigorous F12/1 rootstock. The lower storage temperature decreased the SSC independently of the storage atmosphere composition. Firmer fruit was found in CA 2°C compared with the other two treatments. The greatest loss of weight was found after fruit storage in NA 8°C. The extent of fruit decay depended on the season, storage conditions and the rootstock. Storage in NA 8°C of the fruit grown on F12/1 rootstock resulted in the highest percentage of fungal decay. The best retention of the green colour of the peduncle was noted in CA 2°C. The findings on how the rootstocks affect sweet cherry fruit properties can be useful for sweet cherry breeding programmes, as well as for sweet cherry crop production and storage technologies.

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Enhanced Degreening of Apple Fruit by Jasmonates

HortScience ◽

10.21273/hortsci.32.3.457d ◽

1997 ◽

Vol 32 (3) ◽

pp. 457D-457

Author(s):

Xuetong Fan ◽

James P. Mattheis

Keyword(s):

Aqueous Solution ◽

Jasmonic Acid ◽

Ethylene Production ◽

Titratable Acidity ◽

Apple Fruit ◽

Soluble Solids ◽

Soluble Solids Content ◽

Minimum Concentration ◽

Golden Delicious ◽

Solids Content

Airborne methyl jasmonate (MJ) can modulate apple fruit ripening, including the degreening process. Degreening of `Fuji' and `Golden Delicious' apples by jasmonates [jasmonic acid (JA) and MJ] in aqueous solution was investigated. JA and MJ applied by dipping apples in solutions of jasmonates for 2 min enhanced degreening during ripening at 20C. MJ was more effective at promoting degreening compared to JA. The minimum concentration of jasmonates required to promote significant degreening during the 2-week ripening period was 1 mM. Degreening of jasmonate-treated apples ripened at 4C progressed slower compared to apples ripened at 20°C. JA stimulated apple fruit ethylene production at concentrations as low as 10 μM. Jasmonates at 1 or 10 mM were more effective at accelerating the degreening process compared to 0.35 or 3.5 mM ethephon. Firmness, soluble solids content, and titratable acidity of `Fuji' apples were not significantly affected by jasmonate treatments. Peel injury occurred on apples treated with 10 mM JA or 3.5 mM ethephon.

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Hydrothermic Treatment Effects on Some Ripening Changes on Mango Fruits (Mangifera indica L) `Crillo de Bocado' during Storage: II. Chemical Parameters

HortScience ◽

10.21273/hortsci.33.3.520e ◽

1998 ◽

Vol 33 (3) ◽

pp. 520e-520

Author(s):

Juan E Manzano ◽

Oswaldo Valor

Keyword(s):

Low Temperature ◽

Storage Time ◽

Storage Temperature ◽

Mangifera Indica ◽

Soluble Solids ◽

Soluble Solids Content ◽

Chemical Parameters ◽

Randomized Design ◽

Solids Content ◽

Green Stage

Mango fruits `Criollo de Bocado' harvested at the mature-green stage were treated with a hydrothermic treatment of 55 °C for 3 min and stored for 20 days at temperatures of 10 ± 2, 15 ± 2 and 28 ± 2 °C. A randomized design 2 × 3 × 4 with three replications was used. Some chemical parameters were analyzed, such as total soluble solids content (% TSS), pH, tritatable acidity, and TSS/tritatable acidity ratio. TSS content increased with storage time at low temperature. The pH increased measurably with storage temperature, while tritatable acidity values results had inconsistent data.

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Evaluation of fermented tea (kombucha) quality

Žemės ūkio mokslai ◽

10.6001/zemesukiomokslai.v26i4.4200 ◽

2020 ◽

Vol 26 (4) ◽

Author(s):

Vanesa Šliažaitė ◽

Aurelija Paulauskienė ◽

Aurimas Krasauskas

Keyword(s):

Antioxidant Activity ◽

Acetic Acid ◽

Sensory Evaluation ◽

Total Content ◽

Titratable Acidity ◽

Soluble Solids ◽

Total Phenolic ◽

Soluble Solids Content ◽

Fermentation Conditions ◽

Solids Content

The research was done at Aleksandras Stulginskis University (Vytautas Magnus University Agriculture Academy since 2019) in 2017–2018. The research object was kombucha beverage brewed from Camellia sinensis L. black, green, oolong, pu-erh tea and fermented for 9 and 22 days by microorganisms at different room lighting conditions. The soluble solids content, active acidity and titratable acidity were determined in teas fermented for 22 days. The total amount of phenolics compounds, antioxidant activity, yeast colonies and sensory evaluation of tea were determined in teas fermented for 9 days. The research results showed that the quality of fermented tea was dependent on the tea species, but fermentation conditions were not essential. During the fermentation the soluble solids content of tea decreased by an average of 0.60% and the content of acetic acid increased by 0.34%. The highest content of acetic acid was found on the 22nd day of fermentation in all species of teas. The active acidity (pH) of all investigated species of teas decreased significantly during the fermentation process. The total content of phenolic compunds in all species of teas during the fermentation increased from 20 to 57% regardless of fermentation conditions. The highest content of total phenolic compounds was established in teas fermented for 9 days. The antioxidant activity of teas fermented for 9 days varied depending on the fermentation conditions. For black and green teas fermented in the light the antioxidant activity decreased, for oolong and pu-erh teas fermented in the dark the antioxidant activity increased. The number of yeast colonies increased in all tea samples during the fermentation. The best taste was fixed for pu-erh tea, which scored the highest (11.4) in sensory evaluation.

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Prestorage Heat Treatment as a Means of Improving Poststorage Quality of Apples

Journal of the American Society for Horticultural Science ◽

10.21273/jashs.115.2.265 ◽

1990 ◽

Vol 115 (2) ◽

pp. 265-269 ◽

Cited By ~ 70

Author(s):

Joshua D. Klein ◽

Susan Lurie

Keyword(s):

Heat Treatment ◽

Ethylene Production ◽

Titratable Acidity ◽

Soluble Solids ◽

Optimum Temperature ◽

Major Benefit ◽

Solids Concentration ◽

And Storage ◽

Soluble Solids Concentration

The benefits conferred by a prestorage heat treatment on poststorage quality of apples (Malus domestics Borkh.) were measured on `Anna', a non-storing early cultivar, and `Granny Smith', a long-storing late cultivar. The major benefit was a decrease in rate of apple softening, both during OC storage and during simulated shelf life at 20C. Soluble solids concentration was not affected by heat treatment, but titratable acidity was reduced. Ethylene production after heat treatment and storage was similar to or higher than that of control apples, but respiration was lower. The optimum temperature and time combination for prestorage treatment of both cultivars was 4 days at 38C.

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Influence of stock on physical and chemical traits of fresh apricot fruit

International Agrophysics ◽

10.2478/v10247-012-0075-x ◽

2013 ◽

Vol 27 (1) ◽

pp. 111-114 ◽

Cited By ~ 1

Author(s):

T. Milošević ◽

N. Milošević ◽

I. Glišić ◽

G. Šekularac

Keyword(s):

Titratable Acidity ◽

The Other ◽

Soluble Solids ◽

Fruit Firmness ◽

Soluble Solids Content ◽

Total Sugars ◽

Solids Content ◽

Chemical Traits ◽

Physical And Chemical ◽

Fruit Mass

Abstract The study was conducted to determine the effects of Myrobalan rootstock and Blackthorn interstock on fruit physical and chemical traits of five apricot cultivars. The results showed that cultivars grafted on Myrobalan rootstock appear to induce a higher fruit mass when compared with the Blackthorn interstock. Blackthorn interstock showed a tendency to induce a higher soluble solids/titratable acidity ratio than Myrobalan. Values of soluble solids content, total sugars, titratable acidity and fruit firmness between Myrobalan rootstock and Blackthorn interstock were not significant. Regarding cultivars, the greatest fruit mass observed in Roxana in both treatments, and the lowest in Biljana on Myrobalan and in Vera on Blackthorn. The lowest soluble solids, total sugars and soluble solids/titratable acidity ratio were found in Roxana in both variants of grafting, whereas the greatest titratable acidity also observed in Roxana in both cases, respectively. Based on the results from this study, the fruits of Roxana can be recommended for fresh consumption, whereas fruits of the other cultivars can be recommended for processing.

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Nondestructive Quality Screening of Green Tomatoes Using Ethylene Gas

HortScience ◽

10.21273/hortsci.31.4.641b ◽

1996 ◽

Vol 31 (4) ◽

pp. 641b-641

Author(s):

F. Maul ◽

S.A. Sargent

Keyword(s):

Ascorbic Acid Content ◽

Titratable Acidity ◽

Quality Parameters ◽

Soluble Solids ◽

Short Exposure ◽

Internal Quality ◽

Soluble Solids Content ◽

Nondestructive Technique ◽

Total Sugars ◽

Solids Content

The effects of prolonged ethylene exposure on external and internal quality parameters of tomato fruits were studied in order to explore the feasibility of its use as a nondestructive technique for screening immature and inferior quality fruit. `Agriset' and `CPT-5' tomatoes were hand harvested at Stage 1 (green) and held at 20°C and 50 ppm ethylene for 1-7 days. Each 24 hours, fruits reaching Stage 2 (breaker) were removed from C2H4 and transferred to 20°C air for subsequent ripening. Tomatoes were considered at edible maturity upon reaching full red-ripe stage and 4 mm deformation and final quality parameters were determined. For both cultivars, fruits which required prolonged C2H4 exposure to reach Stage 2 had lower overall visual appearance. `Agriset' tomatoes which required short exposure times to C2H4 (1 to 3 days) had somewhat higher quality than those requiring prolonged times (4 or 5 days). Days to reach edible maturity were 9.5 and 7.7, respectively. For the short exposure times, peel color was more intense (higher chroma value), while soluble solids content and total sugars were significantly higher (P = 0.05). Quality of `CPT-5' tomatoes was not adversely affected until requiring 6 or 7 days exposure to C2H4. Days to reach edible maturity decreased from an average of 12.5 to 11.0 for 1 to 5 or for 6 to 7 days exposure, respectively. For fruits requiring 7 days exposure, soluble solids content, total sugars and pH were significantly higher than for those reaching Stage 2 in fewer days. There were no significant differences in titratable acidity or ascorbic acid content for either cultivar.

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The Influence of Climate on Fruit Development and Quality of Four Low-chill Peach Cultivars

HortScience ◽

10.21273/hortsci.44.3.666 ◽

2009 ◽

Vol 44 (3) ◽

pp. 666-670 ◽

Cited By ~ 9

Author(s):

Todd W. Wert ◽

Jeffrey G. Williamson ◽

Jose X. Chaparro ◽

E. Paul Miller ◽

Robert E. Rouse

Keyword(s):

Fruit Development ◽

Titratable Acidity ◽

Fruit Weight ◽

Soluble Solids ◽

Soluble Solids Content ◽

North Central ◽

Southwest Florida ◽

The North ◽

Solids Content

The effect of climate was observed on fruit quality of four low-chill peach cultivars (Flordaprince, Flordaglo, UFGold, and TropicBeauty). The cultivars were evaluated in three locations (north–central, central, and southwest Florida). Soluble solids content (SSC), titratable acidity (TA), SSC:TA ratio, fruit weight, blush, and fruit development period (FDP) were determined. Longer FDPs were observed at the north–central location than at the southwest location. Fruit development and the expression of quality attributes were affected by location during fruit growth with higher color and SSC and shorter FDP occurring under warmer conditions. Within locations, ‘UFGold’ had the shortest FDP except at the southwest location where its chilling requirement may not have been met. At the central and southwest locations, ‘UFGold’ also tended to have lower TA values and higher SSC;TA ratios than the other cultivars.

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