Influence of potassium supply and storage conditions on the discoloration of raw and cooked potato tubers of cv. Pimpernel

1974 ◽  
Vol 17 (3) ◽  
pp. 271-282 ◽  
Author(s):  
Ragnar Baerug ◽  
Rolf Enge
Keyword(s):  
Storage Conditions ◽  
Potato Tubers ◽  
Potassium Supply ◽  
And Storage

Effect of Growth-Location and Length of Storage on Glycoalkaloid Content of Roadside-Stand Potatoes as Stored by Consumers

1983 ◽  
Vol 46 (2) ◽  
pp. 119-121 ◽  
Author(s):  
ANN M. WILSON ◽  
DEBORAH F. MCGANN ◽  
RODNEY J. BUSHWAY
Keyword(s):  
Statistical Analysis ◽  
Storage Time ◽  
Storage Conditions ◽  
The State ◽  
Potato Tubers ◽  
Toxic Level ◽  
Wet Weight ◽  
Total Glycoalkaloids ◽  
The Individual ◽  
And Storage

Potato tubers were purchased from roadside stands at 25 locations in the State of Maine and were stored from 1 to 3 months under home storage conditions at 12.2°C. Initially and after 1 and 3 months of storage, tubers were analyzed for their α-chaconine, α-solanine and total glycoalkaloid (TGA) contents. Mean α-chaconine, α-solanine and total glycoalkaloid contents of the tubers ranged from 0.41 to 3.45, 0.35 to 1.51 and 0.75 to 6.16 mg/100 g of tuber (wet weight), respectively. Statistical analysis of the results indicated that the interaction of location and storage time had a significant (P<0.05) effect on concentration of the individual and total glycoalkaloids in the tubers. The results also demonstrated that storage under these suboptimum conditions did not cause an increase of glycoalkaloids to a toxic level.

scholarly journals Effect of Magnesium Supply and Storage Time on Anti-Nutritive Compounds in Potato Tubers

Agronomy ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 339
Author(s):  
Elżbieta Wszelaczyńska ◽  
Jarosław Pobereżny ◽  
Wojciech Kozera ◽  
Tomasz Knapowski ◽  
Elke Pawelzik ◽  
...  
Keyword(s):  
Solanum Tuberosum L ◽  
Daily Intake ◽  
Storage Conditions ◽  
Soil Conditions ◽  
Potato Tubers ◽  
Physical Damage ◽  
Storage Duration ◽  
Long Term Storage ◽  
Nitrate And Nitrite ◽  
And Storage

The nutritional quality of potato tubers is cultivar-specific and depends on climate-soil conditions and agrotechnical practices, as well as the conditions during long-term storage. Studies were performed from 2009–2011 to determine the effects of magnesium fertilisation and storage duration on the contents of the anti-nutritive compound nitrates, nitrites and total glycoalkaloids (TGA) in potato tubers of mid-early cultivar “Bila” (Solanum tuberosum L.). Magnesium (Mg) was applied in doses of 0, 20, 40, 60, 80 and 100 kg MgO ha−1, respectively, in the form of kieserite–magnesium sulphate (26% MgO). Potato quality after harvest and after three and six months of storage was determined. The content of nitrates in tubers after harvest ranged from 303 to 356 mg kg−1 FW and nitrites from 1.59 to 1.67 mg kg−1 FW. Increasing magnesium fertilisation reduced the nitrate and nitrite content of tubers but increased TGA content. Possible explanations for the TGA increase after Mg supply are discussed. Tubers that contained less TGA after harvest also had less glycoalkaloids after storage. However, physical damage during harvest or transportation, exposure to light and bad storage conditions increase the concentrations of glycoalkaloids in tubers. The consumption of cultivar “Bila” would not exceed the acceptable daily intake of harmful substances.

XV.—A Study of the Tyrosinase of Potato Tubers

1933 ◽  
Vol 52 ◽  
pp. 309-314 ◽  
Author(s):  
Ian M. Robertson
Keyword(s):  
Enzyme Activity ◽  
Enzyme Activities ◽  
Storage Conditions ◽  
Tuber Weight ◽  
Potato Tubers ◽  
Department Of Agriculture ◽  
College Of Agriculture ◽  
Probable Significance ◽  
And Storage ◽  
Linear Period

Summary1. A reagent (p-cresol) has been used to determine the activity of tyrosinase in the potato tuber.2. The course of the reaction tyrosinase-p-cresol has been shown to be mono-molecular, with a short linear period at the commencement. From observations of this period, constants for the enzyme activities have been obtained and a temperature coefficient deduced.3. The enzyme activity has been shown to depend upon stage of maturity of tuber, variety of tuber, and disease infection, but to be independent of tuber weight, environment, season, and storage conditions.4. The probable significance of the results has been discussed.The writer wishes to thank the Department of Agriculture for Scotland for a Grant which enabled the work to be carried out, and also Dr A. Lauder and Dr A. M. Smith of the Edinburgh and East of Scotland College of Agriculture for their interest and assistance throughout the course of the work.

scholarly journals The effect of light and gibberellic acid concentrations on breaking dormancy of potato micro tuber

2021 ◽  
Vol 883 (1) ◽  
pp. 012011
Author(s):  
A K Karjadi ◽  
N Waluyo
Keyword(s):  
Block Design ◽  
Storage Conditions ◽  
Visual Observation ◽  
Potato Tubers ◽  
Randomized Block Design ◽  
Breaking Dormancy ◽  
Shoot Number ◽  
And Storage ◽  
Effect Of Light

Abstract Potato (Solanum tuberosum L) is one of Indonesia’s priority crops considering its nutritive benefit as a carbohydrates source in food diversification. Potato tubers are classified as stem tubers, so the tubers such as micro tuber can appear in the stem of in vitro cuttings. The research aimed to determine the effect of GA3 concentrations (0, 5, 10, 15, 20 ppm) and storage conditions, e.g., Dark (T1) and light (T2), on breaking dormancy of potato micro tubers. This experiment was conducted in the Tissue culture Laboratory of IVEGRI from April until September 2018. The experiment used a randomized block design with 3 replications; each treatment consisted of 40 micro tubers of Granola (var.) with size ranged >3 - <4 g per each. The result showed that storage conditions gave significant differences to the percentage of breaking dormancy for 4-6 weeks, and GA3 concentration did not affect the average number of shoot, average shoot length in concentration 5 until 20 ppm. The average shoot number, shoot lengths were 0.63 – 2.20 per tubers, 7.50 – 20.13 mm, respectively. There was no interaction between treatment. Visual observation concluded that storage in light conditions produced shoots with better quality than ones in dark conditions.

scholarly journals The Relationship Between Post-harvest Storage Conditions and Membrane Leakage in the Context of Blackheart in Potato Tubers

2020 ◽  
Vol 21 (2) ◽  
Author(s):  
Yang Yue
Keyword(s):  
Storage Time ◽  
Storage Conditions ◽  
Potato Cultivars ◽  
Conductivity Measurements ◽  
Potato Tubers ◽  
Electrolyte Conductivity ◽  
Membrane Leakage ◽  
The Relationship ◽  
And Storage ◽  
Different Tissues

The relationship between potato (Solanum tuberosumL.) tuber membrane permeability and storage conditions were examined. Tubers from four potato cultivars were stored for 1 year at 2 °C and4 °C, and tubers transferred from 4 °C to 2 °C for 48 hours. Electrolyte conductivity measurements taken from two discs of four potato cultivars with six biological replicates as well as different tissues types including the pith, cortex and parenchyma. The results showed that the longer the storage time and lower the temperature, the higher the electrolyte conductivity of the tissues. And different tissue types pith, cortex and parenchyma had different electrolyte conductivity susceptibility pattern under different storage conditions. Overall, the parenchyma has highest electrolyte leakage and following are pith, cortex has lowest among three different tissue types. However, cultivars that are resistant to Blackheart, surprisingly had higher electrolyte conductivity compared to the Blackheart-susceptible cultivars. Overall, the work demonstrates that storage conditions have a significant effect on membrane leakage but that this doesn’t appear to relate directly to susceptibility to Blackheart. 

Barley seed storage under controlled conditions

2019 ◽  
pp. 140-150 ◽  
Author(s):  
O. A. Zadorozhna ◽  
T. P. Shyianova ◽  
M.Yu. Skorokhodov
Keyword(s):  
Hordeum Vulgare ◽  
Moisture Content ◽  
Spring Barley ◽  
Seed Storage ◽  
Growing Season ◽  
Storage Conditions ◽  
Meteorological Conditions ◽  
Hordeum Vulgare L ◽  
The Relationship ◽  
And Storage

Seed longevity of 76 spring barley gene pool samples (Hordeum vulgare L. subsp. distichon, convar. distichon: 56 nutans Schubl., two deficience (Steud.) Koern., two erectum Rode ex Shuebl., two medicum Koern.; convar. nudum (L.) A.Trof.: one nudum L. та subsp. vulgare: convar. vulgare: nine pallidum Ser., three rikotense Regel.; convar. coeleste (L.) A.Trof.: one coeleste (L.) A.Trof.) from 26 countries, 11 years and four places of reproduction was analyzed. Seeds with 5–8% moisture content were stored in chamber with unregulated and 4oC temperature. The possibility of seed storage under these conditions for at least 10 years without significant changes in germination has been established. The importance of meteorological conditions in the formation and ripening of seeds for their longevity is confirmed. The relationship between the decrease of barley seeds longevity and storage conditions, amount of rainfall, temperature regime during the growing season of plants is discussed.

Comparison of Procedures for Isolation of Monoterpene Hydrocarbons from Fresh Needles of Picea abies and Picea omorica

2000 ◽  
Vol 65 (7) ◽  
pp. 1073-1081 ◽  
Author(s):  
Valerie Holubová ◽  
Iva Chvílíčková ◽  
Vlastimil Kubáň
Keyword(s):  
Picea Abies ◽  
Liquid Nitrogen ◽  
Steam Distillation ◽  
Extraction Efficiency ◽  
Total Content ◽  
Storage Conditions ◽  
Fresh Weight ◽  
Hexane Extraction ◽  
Monoterpene Hydrocarbons ◽  
And Storage

Extraction procedures (steam distillation, supercritical fluid extraction and solvent extraction) for isolation of monoterpene hydrocarbons from fresh needles of Picea abies and Picea omorica were optimised. The procedures were compared with the aim of minimizing consumption of needles and improving the extraction efficiency and repeatability. An influence of homogenisation procedures and storage conditions (liquid nitrogen, -18 and 4 °C) on the total content and composition of essential oils was studied. Cryogenic grinding (liquid nitrogen) combined with the extraction with cold hexane (extraction time 2 h) and subsequent GC-MS determination in freshly homogenised needles gives the best results (1.5-4 times better extraction efficiency, RSD < 10% for P. abies and < 25% for P. omorica). Limits of detections (3 S/N) for individual monoterpene hydrocarbons from units to tens of ng/g and recoveries 97.2-101.4% were found in fresh needles (calculated to fresh weight). While cooling to 4 °C is unacceptable, freezing at -18 °C for the period of 18 days in the dark gives also good results.

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