THE SEASONAL VARIATION IN THE ASCORBIC ACID CONTENT OF EDIBLE WILD PLANTS COMMONLY FOUND IN NEW BRUNSWICK

1947 ◽  
Vol 25c (3) ◽  
pp. 95-101 ◽  
Author(s):  
Elizabeth A. Baird ◽  
Muriel G. Lane
Keyword(s):  
Ascorbic Acid ◽  
Seasonal Variation ◽  
New Brunswick ◽  
Acid Content ◽  
Dehydroascorbic Acid ◽  
Ascorbic Acid Content ◽  
Wild Plants ◽  
Edible Wild Plants ◽  
Green Leaves

The ascorbic acid content in the leaves of 10 wild plants that grow in New Brunswick was determined at approximately two-week intervals from June to September. 'Free' and 'total' dehydroascorbic acid were measured, using the method of Roe. The total ascorbic acid is highest in young green leaves. After the plants have flowered the ascorbic acid decreases. It becomes almost negligible when the leaves have wilted and turned brown. 'Free' dehydroascorbic acid was present in all 10 plants in small quantity. It fluctuated from time to time but remained fairly constant for all the plants during the period of investigation, and was independent of the 'total' value for that plant. The values for ascorbic acid have been measured for ripe strawberries, for fiddleheads, and for several common vegetables over the same summer months. They have been tabulated for comparison with the values of ascorbic acid of the 10 wild plants.

scholarly journals Antioxidant and Prebiotic Activity of Selected Edible Wild Plant Extracts

2016 ◽  
Vol 6 (1) ◽  
pp. 7
Author(s):  
Poloko Stephen Kheoane ◽  
Clemence Tarirai ◽  
Tendekayi Henry Gadaga ◽  
Carmen Leonard ◽  
Richard Nyanzi
Keyword(s):  
Antioxidant Activity ◽  
Ascorbic Acid ◽  
Plant Extracts ◽  
Acid Content ◽  
Dietary Fibre ◽  
Wild Plants ◽  
Wild Plant ◽  
Edible Wild Plant ◽  
Edible Wild Plants ◽  
Total Dietary Fibre

Edible wild plants were investigated as potential sources of antioxidants and prebiotics to benefit human health. Antioxidant activity, ascorbic acid and total dietary fibre contents were determined in edible wild plants from Lesotho, Swaziland and South Africa. Pure probiotic strains of Bifidobacterium animalis subsp. animalis (ATCC 25527), Lactobacillus rhamnosus (TUTBFD) and Lactobacillus acidophilus (ATCC 314) were cultured in broth containing edible wild plant extracts to assess their prebiotic activity. Cyperus esculantus had the highest arscobic acid content of 603±64.1 mg/100 g edible dry plant material followed by Rosa rubiginosa (500.8±48.8 mg/100 g). The two plants had IC50 of 10.7±0.2 µg/mL and 47.8±0.2 µg/mL for DPPH inhibition, respectively. Forty percent (40%) (n=30) of the edible wild plants had significant (p<0.01) total antioxidant activity (IC50<60 µg/mL) and high ascorbic acid content (>200 mg/100 g). Nasturtium officinale reported the highest yield for soluble fibre (25%) while Hypoxis hirsute had the highest total dietary fibre content (7.3%). Rorippa nudiuscula enhanced the growth of B. animalis significantly (p=0.001), 8-fold more than inulin. Chenopodium album and Urtica dioica stimulated the growth of L. rhamnosus significantly (p=0.0001) than inulin, respectfully, while Tragopogon porrifolius significantly (p=0.0001) stimulated the growth of L. acidophilus than inulin. It was concluded that the investigated edible wild plants from southern Africa have antioxidant and prebiotic properties that may be beneficial to human health.

Intracellular ascorbic acid enhances the DNA single-strand breakage and toxicity induced by peroxynitrite in U937 cells

2001 ◽  
Vol 356 (2) ◽  
pp. 509-513 ◽  
Author(s):  
Andrea GUIDARELLI ◽  
Roberta de SANCTIS ◽  
Barbara CELLINI ◽  
Mara FIORANI ◽  
Marina DACHÀ ◽  
...  
Keyword(s):  
Ascorbic Acid ◽  
Acid Content ◽  
Dehydroascorbic Acid ◽  
Ascorbic Acid Content ◽  
Single Strand ◽  
Reduced Form ◽  
U937 Cells ◽  
Intracellular Content ◽  
Independent Mechanism ◽  
Strand Breakage

A well-established protocol to increase the intracellular content of ascorbic acid was used to investigate the effects of the vitamin on DNA single-strand breakage and toxicity mediated by authentic peroxynitrite (ONOO−) in U937 cells. This protocol involved exposure for 60min to 100μM dehydroascorbic acid, which was taken up by the cells and converted into ascorbic acid via a GSH-independent mechanism. At the time of exposure to ONOO−, which was performed in fresh saline immediately after loading with dehydroascorbic acid, the vitamin present in the cells was all in its reduced form. It was found that, in cells that are otherwise ascorbate-deficient, an increase in their ascorbic acid content does not prevent, but rather enhances, the DNA-damaging and lethal responses mediated by exogenous ONOO−. These results therefore suggest that acute supplementation of ascorbic acid can be detrimental for individuals with pathologies associated with a decrease in ascorbic acid and in which ONOO− is known to promote deleterious effects.

ASCORBIC ACID IN POTATOES GROWN IN NEW BRUNSWICK

1948 ◽  
Vol 26c (4) ◽  
pp. 433-444 ◽  
Author(s):  
Elizabeth A. Baird ◽  
J. Lorne Howatt
Keyword(s):  
Ascorbic Acid ◽  
New Brunswick ◽  
Potato Tuber ◽  
Acid Content ◽  
Storage Time ◽  
Ascorbic Acid Content ◽  
Apparent Effect ◽  
Potato Varieties ◽  
Tuber Maturity ◽  
And Storage

Values for the ascorbic acid content in the tubers of nine potato varieties have been compared. The effects of different fertilizers have been studied. Location of plots throughout the province was considered. Changes in ascorbic acid content due to tuber maturity and storage time have been measured at regular intervals. The relative amounts of ascorbic acid in the stem and eye ends of tubers have been found. Effects of top-killers on the ascorbic acid content of tubers were noted. No relationship was observed between the ascorbic acid content and either variety or fertilizer. The highest values for ascorbic acid were obtained in August. Losses during maturity and storage were continuous and fairly regular. Top-killers produced no apparent effect on the ascorbic acid content of tubers. The eye end of the potato tuber contained approximately 20% more ascorbic acid than the stem end.

ASCORBIC ACID IN RED RASPBERRY FRUIT AND LEAVES

1970 ◽  
Vol 50 (4) ◽  
pp. 457-461 ◽  
Author(s):  
S. O. FEJER ◽  
F. B. JOHNSTON ◽  
MADELEINE M. HAMMILL ◽  
L. P. S. SPANGELO
Keyword(s):  
Ascorbic Acid ◽  
Acid Content ◽  
Dehydroascorbic Acid ◽  
Ascorbic Acid Content ◽  
Leaf Fall ◽  
Red Raspberry ◽  
Present Stage ◽  
Present Material ◽  
Positive Correlations ◽  
Selection Of

Ascorbic acid content of leaves of 30 red raspberry clones was much higher than that of the fruits. In spite of seasonal variation both in leaf and fruit, ascorbic acid content of any clone was relatively similar in the same seasons of two consecutive years. However, the relation of leaf to fruit ascorbic acid was very variable between harvests, ranging from significantly negative to positive correlations. Thus, a selection of high ascorbic acid in the leaf to increase this compound in the fruit is not possible at the present stage, although there were indications that the content of the leaf is inherited by the seedlings. Dehydroascorbic acid was very low in the fall-fruiting Comet raspberry. High ascorbic acid content was related to early leaf fall in the present material.

Concentrations of vitamin C in milk of sows and in plasma of piglets

1995 ◽  
Vol 75 (2) ◽  
pp. 275-277 ◽  
Author(s):  
M. Hidiroglou ◽  
T. R. Batra
Keyword(s):  
Ascorbic Acid ◽  
Blood Plasma ◽  
Acid Concentration ◽  
Acid Content ◽  
High Performance ◽  
Dehydroascorbic Acid ◽  
Ascorbic Acid Content ◽  
Plasma Ascorbic Acid ◽  
Maternal Milk ◽  
Key Words Ascorbic Acid

Colostrum or milk samples from 10 sows and blood plasma samples from 68 piglets were taken between 0 and 28 d after farrowing and analyzed for ascorbic acid and dehydroascorbic acid by high-performance liquid chromatography with electro-chemical detector. Ascorbic acid content of colostrum (265.0 μm mL−1) was more than twice that of subsequently produced milk (100.0 μg mL−1) at 7 d of age. Ascorbic acid content of blood plasma of piglets at birth after uptake of colostrum was 13.1 μg mL−1, which slowly declined during the first 28 d of age to 3.2 μg mL−1. The dehydroascorbic acid concentration in the plasma of piglets ranged from 3.0 μg mL−1 to 3.9 μg mL−1from 7 d to 28 d of age. There was a significant positive correlation between piglet plasma ascorbic acid and maternal milk ascorbic acid concentration. Key words: Ascorbic acid, dehydroascorbic acid, colostrum

Analysis of ascorbic acid content in various fruits and vegetables by spectrofluorimetric methods

Planta Medica ◽  
2011 ◽  
Vol 77 (12) ◽  
Author(s):  
A Haskovic ◽  
A Copra Janicijevic ◽  
A Topcagic ◽  
L Klepo ◽  
A Kapur ◽  
...  
Keyword(s):  
Ascorbic Acid ◽  
Acid Content ◽  
Fruits And Vegetables ◽  
Ascorbic Acid Content

scholarly journals Silicon attenuates calcium deficiency by increasing ascorbic acid content, growth and quality of cabbage leaves

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Dalila Lopes da Silva ◽  
Renato de Mello Prado ◽  
Luis Felipe Lata Tenesaca ◽  
José Lucas Farias da Silva ◽  
Ben-Hur Mattiuz
Keyword(s):  
Ascorbic Acid ◽  
Nutrient Solution ◽  
Acid Content ◽  
Dry Matter ◽  
Ascorbic Acid Content ◽  
Calcium Deficiency ◽  
Ca Deficiency ◽  
Leaf Water Loss ◽  
Nutrient Solutions

AbstractCalcium (Ca) deficiency in cabbage plants induces oxidative damage, hampering growth and decreasing quality, however, it is hypothesized that silicon (Si) added to the nutrient solution may alleviate crop losses. Therefore, this study aims at evaluating whether silicon supplied in the nutrient solution reduces, in fact, the calcium deficiency effects on cabbage plants. In a greenhouse, cabbage plants were grown using nutrient solutions with Ca sufficiency and Ca deficiency (5 mM) without and with added silicon (2.5 mM), arranged as a 2 × 2 factorial in randomized blocks, with five replications. At 91 days after transplanting, the plants were harvested for biological evaluations. In the treatment without added Si, Ca deficiency promoted oxidative stress, low antioxidant content, decreased dry matter, and lower quality leaf. On the other hand, added Si attenuated Ca deficiency in cabbage by decreasing cell extravasation while increasing both ascorbic acid content and fresh and dry matter, providing firmer leaves due to diminished leaf water loss after harvesting. We highlighted the agronomic importance of Si added to the nutrient solution, especially in crops at risk of Ca deficiency.

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