CITRIC ACID AND POTASSIUM CONTENTS OF RUSSET BURBANK POTATO IN ALBERTA

1985 ◽  
Vol 65 (3) ◽  
pp. 793-795 ◽  
Author(s):  
D. R. LYNCH ◽  
M. S. KALDY
Keyword(s):  
Citric Acid ◽  
Chlorogenic Acid ◽  
Acid Content ◽  
Russet Burbank Potato ◽  
Russet Burbank ◽  
Potassium Content ◽  
Potato Tubers ◽  
Acid Ratio ◽  
Southern Alberta ◽  
Production Areas

Citric acid and potassium contents were determined for Russet Burbank tubers collected from the major production areas in Alberta. An increase in the ratio of citric to chlorogenic acid content is known to be associated with a decrease in the tendency for potato tubers to darken after cooking. Tuber citric acid and potassium contents were higher in southerly locations than in central locations. The trend for citric acid is the reverse of that for chlorogenic acid established in a previous study. Thus, potatoes grown at southern Alberta locations have a higher citric to chlorogenic acid ratio than those grown in central locations, suggesting that they would be less subject to after-cooking darkening.Key words: Darkening (after-cooking), citric acid, chlorogenic acid, potassium content, Russet Burbank, potato

Chlorogenic acid content of Russet Burbank potato in Alberta

1983 ◽  
Vol 60 (5) ◽  
pp. 375-377 ◽  
Author(s):  
M. S. Kaldy ◽  
D. R. Lynch
Keyword(s):  
Chlorogenic Acid ◽  
Acid Content ◽  
Russet Burbank Potato ◽  
Russet Burbank

scholarly journals Chlorogenic acid content in potato tubers with colored flesh as affected by a genotype, location and long-term storage

2019 ◽  
Vol 65 (No. 7) ◽  
pp. 355-360
Author(s):  
Matyáš Orsák ◽  
Karel Hamouz ◽  
Jaromír Lachman ◽  
Pavel Kasal
Keyword(s):  
Chlorogenic Acid ◽  
Acid Content ◽  
Field Experiments ◽  
The Other ◽  
Potato Tubers ◽  
Flesh Color ◽  
Long Term Storage ◽  
And Storage ◽  
Term Storage

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).

scholarly journals Behavior of Ten Chironja Clones at Three Sites. II. Fruit Quality

1969 ◽  
Vol 64 (3) ◽  
pp. 323-329
Author(s):  
A. Pérez ◽  
E. Boneta ◽  
E. Pérez ◽  
J. Green
Keyword(s):  
Citric Acid ◽  
Fruit Quality ◽  
Acid Content ◽  
Soluble Solids ◽  
Lower Percentage ◽  
Total Soluble Solids ◽  
Acid Ratio ◽  
Citric Acid Content ◽  
Number Of Seeds ◽  
Juice Content

Ten chironja clonal varieties were studied at the Isabela, Corozal, and Adjuntas Substations with respect to their fruit qualities. The total soluble solids at Isabela and Corozal was 11%, significantly lower than that at Adjuntas, (15%). The total soluble solids increased as the tree became older. The citric acid content at the Isabela and Corozal Substations was 0.6%, significantly lower than that at Adjuntas, (0.9%). Acid content varied significantly between years and Substations. The Brix/acid ratio at Adjuntas was 17, significantly lower than that at Isabela and Corozal, where it was 19. The citric acid content varied among the different clonal varieties. The fruits harvested during 1971 were rounder than those of 1972, which were elongated. The fruits at Adjuntas were smaller and had a significantly lower percentage of juice than those at Isabela and Corozal, which were equal in size and juice content. Fruits at Isabela had significantly lower peel percentage than those at Corozal and Adjuntas, which did not differ. Fruits produced at Isabela had significantly more seeds than those at Corozal and Adjuntas. The number of seeds per fruit varied significantly among years and Substations. The 2-3 and 3-6 clonal varieties had 11 and 14 seconds respectively, significantly fewer than those all other clones. Therefore, these two clones should be propagated by growers who prefer chironja fruits with fewer seeds.

scholarly journals Diffusivity of Carbon Dioxide through the Skin and Flesh of `Russet Burbank' Potato Tubers

1994 ◽  
Vol 119 (4) ◽  
pp. 742-746 ◽  
Author(s):  
Aref A. Abdul-Baki ◽  
Theophanes Solomos
Keyword(s):  
Diffusion Coefficient ◽  
Russet Burbank Potato ◽  
Storage Conditions ◽  
Gas Diffusion ◽  
Russet Burbank ◽  
Aerobic Respiration ◽  
Potato Tubers ◽  
Average Diffusion Coefficient ◽  
Average Diffusion ◽  
Main Barrier

The diffusion coefficient of CO2 in `Russet Burbank' potato (Solanum tuberosum L.) tubers was determined under steady-state conditions at 10 and 27C. The data showed that the skin is the main barrier to gas diffusion, with an average diffusion coefficient of 6.57 × 10-7 and 7.61 × 10-7 cm·s-1 at 10 and 27C, respectively. The flesh also presents an appreciable barrier to gas diffusion. The average diffusion coefficient of CO2 in the flesh was 2.00 × 10-4 and 2.24 × 10-4 cm·s-1 at 10 and 27C, respectively. Under regular storage conditions, the tuber is well aerated and the concentration of O2 at the center of the tuber is sufficient to maintain aerobic respiration.

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