The relationship between respiration and chip color during long-term storage of potato tubers

In three-year field experiments, the effect of genotype, flesh color, site conditions and storage on chlorogenic acid content (CAC) in tubers of potato cultivars with purple or red flesh was compared to yellow-fleshed cv. Agria. The results confirmed the significant effect of genotype on CAC. The highest CAC was characteristic on a three-year mean for the purple-fleshed cv. Vitelotte (769.5 mg/kg fresh weight (FW)), i.e. 1.19−2.6 times higher than in the other cultivars. In regard to the effect of flesh color, significantly higher mean CAC levels have been shown for the red-fleshed (2.8 times) and purple-fleshed (3.16 times) cultivars in comparison with cv. Agria (148 mg/kg FW). At the Uhříněves location with a warmer climate and frequent dry periods as compared to the second Valečov location, a higher CAC (1.18 times) was found. Cold storage (4°C, 6 months) resulted in a significant CAC increase varying from 33.2% in the Blaue St. Galler cultivar to 210.6% in the Vitelotte cultivar among all eight evaluated color-fleshed cultivars. On the other hand, the effect of storage on CAC was not evident in the yellow-fleshed Agria cultivar (inconclusive difference against CAC after harvest).

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Relationship between Acoustic Firmness and Magness Taylor Firmness in Royal Gala and Golden Smoothee Apples

Food Science and Technology International ◽

10.1177/1082013208100507 ◽

2009 ◽

Vol 15 (1) ◽

pp. 31-40 ◽

Cited By ~ 14

Author(s):

D. Molina-Delgado ◽

S. Alegre ◽

J. Puy ◽

I. Recasens

Keyword(s):

Quality Parameters ◽

Acoustic Measurements ◽

Good Tool ◽

Malus Domestica Borkh ◽

Long Term Storage ◽

Acoustic Methods ◽

The Relationship ◽

And Storage ◽

Term Storage

This study aimed to evaluate apple firmness measured using both the penetrometer and acoustic methods. The methodologies were applied to Royal Gaya and Golden Smoothee apples (Malus domestica. Borkh) harvested from 12 different orchards in Catalonia (Spain), on six different dates, and over three seasons. The relationship between firmness and physicochemical quality parameters was analyzed at harvest and post-harvest. The results obtained showed a noticeable correlation between Magness Taylor firmness and acoustic measurements in Royal Gala, but no correlation was found for Golden Smoothee. Fruit variety and storage had a clear influence on correlations between the two measurements. Measurements of Magnes Taylor and acoustic firmness seemed to correspond to different physical properties. Acoustic measurements seemed to be a good tool for evaluating changes in tissue firmness during long-term storage, especially for Golden Smoothee apples. The maturity of the fruit seemed to play a more important role in the measurement of Magnes Taylor firmness than in the measurement of acoustic firmness for the Royal Gaya variety.

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Changes of Organoleptic Quality in Potato Tubers after Application of Natural Sprout Inhibitors

Agricultural Engineering ◽

10.1515/agriceng-2016-0004 ◽

2016 ◽

Vol 20 (1) ◽

pp. 35-43 ◽

Cited By ~ 1

Author(s):

Magdalena Grudzińska ◽

Zbigniew Czerko ◽

Monika Borowska-Komenda

Keyword(s):

Essential Oils ◽

Early Group ◽

Potato Tubers ◽

National Research Institute ◽

Long Term Storage ◽

Study Results ◽

Sprout Inhibitors ◽

Taste And Smell ◽

Term Storage

AbstractThe aim of this study was to evaluate changes in the sensory properties of the table potato in relation to the use of natural sprout inhibitors during long-term storage. The material for the study consisted in four varieties of potato of the medium early group. The research was carried out in the Plant Breeding and Acclimatization Institute – National Research Institute Branch in Jadwisin in 2014-2015. After harvest potatoes were stored from the end of October to April at 5°C, at the relative humidity of 90-95%, without application of natural sprout inhibitors (control) and using the natural sprout inhibitors (essential oils). After storage, the potatoes were boiled and sensory evaluation was carried out, which includes qualities such as: over-cooking of the surface, texture, mealiness, flesh texture, taste and smell. Study results showed that long-term storage of potatoes treated with natural sprout inhibitors – peppermint, caraway and clove essential oils is significant for the changes in overcooking the surface, structure of potatoes and mealiness of tubers after cooking. The taste and smell of potato tubers depended only on the variety.

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USING PREHARVEST TEMPERATURES TO PREDICT SCALD DEVELOPMENT ON APPLES IN NEW ENGLAND AND NEW ZEALAND

HortScience ◽

10.21273/hortsci.27.11.1160a ◽

1992 ◽

Vol 27 (11) ◽

pp. 1160a-1160

Author(s):

William J. Bramlage

Keyword(s):

New Zealand ◽

New England ◽

Fruit Ripening ◽

Moderate Temperature ◽

Base Temperature ◽

Temperature Changes ◽

Long Term Storage ◽

The Relationship ◽

Term Storage

Preharvest temperature (hrs. below 10°C) is a predictor of scald development on North American apples after long-term storage. In Mass., these variables are highly negatively correlated for both `Delicious' and `Cortland' apples. However, this predictor was not generally applicable for scald development on `Delicious' or `Granny Smith' apples in New Zealand. There, the relationship between temperature and scald varied greatly among districts for both cultivars, with scald resistance often occurring with far fewer hrs. below 10° than in Mass. Yet, in two cases when the temperature: scald relationship for `Granny Smith' was similar to that for `Cortland' and `Delicious' in Mass., temperature patterns during fruit ripening were similar to that in Mass. In all other cases, more moderate temperature changes occurred. These results suggest that the true base temperature for developing resistance to scald may be between 10° and 15°C, rather than 10°.

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Method for the Reduction of Natural Losses of Potato Tubers During their Long-Term Storage

Sustainability ◽

10.3390/su12031048 ◽

2020 ◽

Vol 12 (3) ◽

pp. 1048 ◽

Cited By ~ 6

Author(s):

Tomasz Jakubowski ◽

Jolanta B. Królczyk

Keyword(s):

Control Sample ◽

Storage Conditions ◽

Potato Tubers ◽

Long Term Storage ◽

Long Wave ◽

Cold Store ◽

Natural Losses ◽

Uv C ◽

Term Storage

The purpose of the study was to establish whether UV-C radiation applied to potato tubers prior to their storage affected their natural losses over a long period of time. A custom-built UV-C radiation stand constructed for the purpose of this experiment was equipped with a UV-C NBV15 radiator generating a 253.7 nm long wave with power density of 80 to 100 μW∙cm−2. Three varieties of edible medium late potatoes, Jelly, Syrena, and Fianna, were the objects of the research. The measurement of tightly controlled storage conditions was carried out over three seasons between 2016/2017 and 2018/2019, in a professional agricultural cold store with automated adjustment of interior microclimate parameters. The obtained data were processed using the variance analysis (α = 0.05). There was a statistically significant reduction in transpiration- and respiration-caused losses in the UV-C radiated potato tubers in comparison to those of the control sample. Additionally, the Jelly variety reacted to UV-C radiation demonstrating a reduction in sprout weight.

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Relationship between dry matter content at harvest and maturity index and post-harvest quality of ‘Fuji’ apples

Revista Brasileira de Fruticultura ◽

10.1590/0100-29452018596 ◽

2018 ◽

Vol 40 (2) ◽

Author(s):

Marcelo José Vieira ◽

Luiz Carlos Argenta ◽

James Peter Mattheis ◽

Cassandro Vidal Talamini do Amarante ◽

Cristiano André Steffens

Keyword(s):

Dry Matter ◽

Apple Fruit ◽

Matter Content ◽

Maturity Index ◽

Dry Matter Content ◽

Post Harvest ◽

Long Term Storage ◽

The Relationship ◽

Term Storage

Abstract Two experiments were carried out to evaluate the relationship between dry matter content (DMC) and maturity index of ‘Fuji’ apple fruit sports (‘Mishima’, ‘Fuji Select’ and ‘Fuji Suprema’) during the final stage of fruit growth, and the relationship between DMC at harvest and the post-harvest fruit quality. Fruit were harvested from orchards of three regions (Caçador, São Joaquim and Vacaria), on two rootstocks (M9 and Marubakaido with M9 interstock). In experiment 1 (2014), fruit were periodically sampled beginning 83 days before the commercial harvest period. In experiment 2, fruit were harvested at optimum maturity for long-term storage and stored in air at 0.5 ºC (2014) or after optimum maturity for long-term storage and stored in controlled atmosphere at 0.7 ºC (2014 and 2015). Apple fruit maturity on the tree was characterized by decreased flesh firmness and increased starch index and soluble solids content (SS) and by a small change in DMC. DMC at harvest was correlated with flesh firmness and SS in one of two years, but DMC was not correlated with the incidence of disorders after storage. The results show that DMC at harvest is not suitable as a maturity index of ‘Fuji’ apples, and its use as a post-harvest quality predictor is not consistent between crop years.

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Storage and Viability Testing of Protea Pollen

Journal of the American Society for Horticultural Science ◽

10.21273/jashs.121.5.804 ◽

1996 ◽

Vol 121 (5) ◽

pp. 804-809 ◽

Cited By ~ 10

Author(s):

I. David van der Walt ◽

Gail M. Littlejohn

Keyword(s):

Storage Temperature ◽

Pollen Viability ◽

Germination Percentage ◽

Long Term Storage ◽

Fresh Pollen ◽

The Relationship ◽

Term Storage ◽

Storage Temperatures

The influence of storage temperature and humidity on pollen viability was studied in four Protea species. Pollen was stored at a range of temperatures and relative humidities for up to 1 year and tested for ability to germinate in vitro. Pollen of P. repens (L.) L. `Sneyd', P. eximia (Salisb. ex Knight) Fourcade `Fiery Duchess' and P. magnifica Link. clone T 84 07 05 stored at -196 °C and -14 to -18 °C retained a germination percentage as high as that of fresh pollen regardless of humidity. Humidity control became increasingly important at storage temperatures above 0 °C. The study showed that long-term storage of Protea pollen is not feasible at temperatures above 0 °C. The relationship between germinability and fluorochromasia (FCR) was studied during storage of `Sneyd' pollen. The correlations between FCR and germinability were found to be low and nonsignificant. Fifteen-month-old cryopreserved `Sneyd' pollen functioned in fertilization and seed set as effectively as fresh pollen.

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Isolation, Identification and Preservation of Fusarium Spp. Causing Dry Rot of Potato Tubers

Plant Breeding and Seed Science ◽

10.1515/plass-2017-0020 ◽

2017 ◽

Vol 76 (1) ◽

pp. 45-51

Author(s):

Emil Stefańczyk ◽

Sylwester Sobkowiak

Keyword(s):

Crop Rotation ◽

Potato Tubers ◽

Fusarium Spp ◽

Single Spore ◽

Dry Rot ◽

Crop Losses ◽

Genus Fusarium ◽

Long Term Storage ◽

Term Storage

Abstract Fungi of the genus Fusarium cause dry rot, a potato disease which develops during long-term storage of tubers. The disease-inducing capabilities differ among Fusarium spp., but may also vary within species universally considered main dry rot agents. Identification of Fusarium spp. present on diseased tubers in a surveyed area can help minimize crop losses and mycotoxin contamination by, for example, applying proper fungicides or planning crop rotation. Here, we present a procedure of obtaining single spore colonies of Fusarium spp. from potato tubers infected by dry rot, their identification using molecular methods and ways of preservation.

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