scholarly journals Changes in Phytochemical Content During Different Growth Stages in Tubers of Five Varieties of Potato (Solanum Tuberosum L.)

2018 ◽  
Vol 6 (1) ◽  
pp. 12-22 ◽  
Author(s):  
Geoffrey Kipkoech Kirui ◽  
Saifuddin Fidahussein Dossaji ◽  
Nelson Onzere Amugune
Keyword(s):  
Solanum Tuberosum ◽  
Phenolic Compounds ◽  
Analytical Methods ◽  
Nutritional Quality ◽  
Solanum Tuberosum L ◽  
Bioactive Metabolites ◽  
Growth Stages ◽  
Potato Varieties ◽  
Safety Limit ◽  
Different Growth Stages

Potato (Solanum tuberosum L.) synthesizes a variety of bioactive metabolites including phenolic compounds and glycoalkaloids that protects against insects and diseases, and may influence its nutritional quality. Phenolics provide valuable health promoting antioxidants, whereas glycoalkaloid concentrations exceeding the upper safety limit of 20 mg/100 g fresh weight (Fwt) are potential neurotoxins. Therefore, efficient selection for tuber nutritional quality is dependent upon safe and reliable analytical methods. The aim of this study was to determine the changes in the concentration of glycoalkaloids and phenolic compounds during different growth stages in tubers of five selected potato varieties grown in Kenya. α-chaconine and α-solanine were separated and identified by HPLC. Total glycoalkaloids (TGA) and phenolics were determined by UV spectrophotometry. Recovery efficiencies for validation of analytical methods ranged from 85.9-93.5%. Significant differences in TGA and phenolic contents were detected among potato varieties. Tuber TGA content ranged from 6.80 to 10.56 mg/100g Fwt in vars. Dutch Robijn and Tigoni, respectively, and were within the upper safety limit. The corresponding values for chlorogenic acid contents in the examined varieties ranged from 46.39 to 58.04 mg/100 g Fwt. Total phenolic concentration in the examined tuber extracts varied ranged from 129.24 to 192.52 mg CGA/g Fwt. Glycoalkaloid and phenolic production were significantly reduced from time of initiation to maturity at 55 and 125 days, respectively, after planting (DAP). These results demonstrate that tuber phytochemicals were strongly influenced by variety and level of maturity. For nutritional safety and quality purposes, harvesting of mature potato tubers after 125 DAP is recommended.

scholarly journals Phenolic compounds in native potato (Solanum tuberosum L.) cooking water, with potential antioxidant activity

2019 ◽  
Vol 39 (1) ◽  
pp. 66-71 ◽  
Author(s):  
Carmen Rosa ROJAS-PADILLA ◽  
Victor Javier VASQUEZ-VILLALOBOS ◽  
Camilo Elber VITAL ◽  
Julio Cesar ROJAS ◽  
Nelson Horacio RIOS ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Solanum Tuberosum ◽  
Phenolic Compounds ◽  
Solanum Tuberosum L ◽  
Cooking Water

Phytotoxicity of Oxidised and Reduced Nitrogen Aerosols on Potato (Solanum Tuberosum L.) Crop

2017 ◽  
pp. 169-188
Author(s):  
Bhagawan Bharali ◽  
Zafar Ullah ◽  
Bhupendra Haloi ◽  
Jayashree Chutia ◽  
Sonbeer Chack
Keyword(s):  
Nitrate Reductase Activity ◽  
Reductase Activity ◽  
Solanum Tuberosum L ◽  
Membrane Stability ◽  
Tuber Initiation ◽  
Growth Stages ◽  
Cell Membrane Stability ◽  
Tuber Bulking ◽  
Use Efficiency ◽  
Different Growth Stages

In a field trial (2012), simulated aerosols: NH4Cl (reduced) and NaNO2 (oxidised) @ 10 & 20 kg ha-1y-1 (˜ 100 ppm & ˜ 200 ppm respectively), 1000 cm3m-2 of each along with a control were misted to population of Kufri Jyoti at different growth stages viz., vegetative (10-60 DAS), tuber initiation (60-90 DAS) and tuber bulking >90DAS). The higher dose of aerosols lowered nitrate reductase activity, nitrogen use efficiency, cell membrane stability, tuber yield, but increased photosynthesis, peroxidise activity significantly. The mechanisms of injury in terms of higher peroxidase activity and lower membrane stability of leaf cells have been elucidated. Foliar feeding of nitrogenous pollutant in the form of aerosols to plants at juvenile stage is important in addition to basal use of recommended fertilizers.

scholarly journals Analysis of Total Phenols, Sugars, and Mineral Elements in Colored Tubers of Solanum tuberosum L.

Foods ◽  
2020 ◽  
Vol 9 (12) ◽  
pp. 1862
Author(s):  
Piret Saar-Reismaa ◽  
Katrin Kotkas ◽  
Viive Rosenberg ◽  
Maria Kulp ◽  
Maria Kuhtinskaja ◽  
...  
Keyword(s):  
Solanum Tuberosum ◽  
Phenolic Compounds ◽  
Total Phenolic Content ◽  
Phenolic Content ◽  
Solanum Tuberosum L ◽  
Sugar Content ◽  
Mineral Elements ◽  
Total Phenolic ◽  
Total Phenols ◽  
Positive Health

The use of colored tubers of Solanum tuberosum L. is growing worldwide due to their health benefits and attractive color. The positive health effects of purple-fleshed tubers are a result of anthocyanins and various phenolic compounds. The aim of this study was to evaluate and compare variety Blue Congo and its cross-breeds of Desiree and Granola to yellow-fleshed tubers. The concentration of total phenols, anthocyanins, sugars, and mineral elements were evaluated in all tubers. The results showed differences between all tested materials, with largest differences in sugar content. Moreover, the results confirmed the preservation of health improving compounds of Blue Congo when cross-bred with yellow-fleshed tubers. The total phenolic content and anthocyanin concentrations of all analyzed tubers were above the comparison yellow ones.

Susceptibility of potato varieties and advanced breeding lines (Solanum tuberosum L.) toPhytophthora infestans (Mont.) de Bary in greenhouse screenings

1997 ◽  
Vol 74 (2) ◽  
pp. 75-86 ◽  
Author(s):  
David S. Douches ◽  
William W. Kirk ◽  
Kazimierz Jastrzebski ◽  
Christopher Long ◽  
Ray Hammerschmidt
Keyword(s):  
Solanum Tuberosum ◽  
Solanum Tuberosum L ◽  
Breeding Lines ◽  
Potato Varieties

PHYSICAL-CHEMICAL AND SENSORY QUALITY EVALUATION OF POTATO VARIETIES (SOLANUM TUBEROSUM L.)

2000 ◽  
Vol 23 (2) ◽  
pp. 149-160 ◽  
Author(s):  
J.E. PARDO ◽  
A. ALVARRUIZ ◽  
J.I. PÉREZ ◽  
R. GÓMEZ ◽  
R. VARÓN
Keyword(s):  
Solanum Tuberosum ◽  
Sensory Quality ◽  
Quality Evaluation ◽  
Solanum Tuberosum L ◽  
Potato Varieties ◽  
Physical Chemical

scholarly journals Infection With X and Y Viruses of Planting Material of Potato Varieties (Solanum tuberosum L.) Grown in the Perm Krai

2020 ◽  
Vol 6 (5) ◽  
pp. 203-210
Author(s):  
V. Pechenkina ◽  
S. Boronnikova
Keyword(s):  
Solanum Tuberosum ◽  
Real Time ◽  
Real Time Pcr ◽  
Crop Yields ◽  
Solanum Tuberosum L ◽  
Potato Varieties ◽  
Potato Viruses ◽  
Private Households ◽  
Planting Material ◽  
Perm Krai

Monitoring of potato varieties phytosanitary status is a necessary measure of its stable yield, since due to the vegetative propagation method, the accumulation of viruses increases over generations. Fourteen varieties of Solanum tuberosum L. grown in the Perm Territory were studied for infection with the potato viruses PVX (X) and PVY (Y). Among them six (Rosara, Impala, Aladdin, Lady Claire, Gala, Madeira) are varieties of foreign selection, and 8 varieties (Golubizna, Udacha, Krasavchik, Charodei, Nevsky, Otrada, Tescha, Elizaveta) — domestic selection. Real-time PCR method was used for material investigation, since it allows quick and efficient evaluation of plant material for the presence of viral infection. During real-time PCR Y potato virus was detected in all 90 samples of 14 studied potato varieties from three storage locations. Potato X virus was detected in 54 samples of 11 studied potato varieties from three different storage locations. It was established that the studied planting material of all 14 varieties of potatoes is infected with the Y virus, which affects crop yields to a greater extent. Private households are most susceptible to infection of planting material with X and Y potato viruses. Recommendations are given on reducing the viral diseases of potato planting material.

scholarly journals Changes in the Content of Some Groups of Phenolic Compounds and Biological Activity of Extracts of Various Parts of Heather (Calluna vulgaris (L.) Hull) at Different Growth Stages

Plants ◽  
2020 ◽  
Vol 9 (8) ◽  
pp. 926
Author(s):  
Victoria Chepel ◽  
Valery Lisun ◽  
Liubov Skrypnik
Keyword(s):  
Antioxidant Activity ◽  
Ascorbic Acid ◽  
Biological Activity ◽  
Phenolic Compounds ◽  
Calluna Vulgaris ◽  
Growth Stages ◽  
Flowering Stage ◽  
Leaf Extracts ◽  
Frap Assay ◽  
Different Growth Stages

Heather (Calluna vulgaris (L.) Hull.) is noted for a diverse chemical composition and a broad range of biological activity. The current study was aimed at monitoring changes in the accumulation of certain groups of phenolic compounds in various organs of heather (leaves, stems, roots, rhizomes, flowers, and seeds) at different growth stages (vegetative, floral budding, flowering, and seed ripening) as well as studying antioxidant (employing the DPPH and FRAP assays) and antibacterial activity of its extracts. The highest total amount of phenolic compounds, tannins, flavonoids, hydroxycinnamic acids, and proanthocyanidins was detected in leaves and roots at all growth stages, except for the flowering stage. At the flowering stage, the highest content of some groups of phenolic compounds (flavonoids, proanthocyanidins, and anthocyanins) was observed in flowers. Highest antioxidant activity was recorded for the flower extracts (about 500 mg of ascorbic acid equivalents per gram according to the DPPH assay) and for the leaf extract at the ripening stage (about 350 mg of ascorbic acid equivalents per gram according to the FRAP assay). Strong correlation was noted between antioxidant activity (DPPH) and the content of anthocyanins (r = 0.75, p ≤ 0.01) as well as between antioxidant activity (FRAP) and the total content of phenolic compounds (r = 0.77, p ≤ 0.01). Leaf extracts and stem extracts turned out to perform antibacterial action against both gram-negative and gram-positive bacteria, whereas root extracts appeared to be active only against B. subtilis, and rhizome extracts against E. coli.

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