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Antioxidant activity in yellow and purple-fleshed potatoes cultivated in different climatic conditions

100%

Hamouz K., Lachman J., Dvorak P., Hejtmankova K., Cepl J.

Zeszyty Problemowe Postępów Nauk Rolniczych

2008

tom 530

In precise field trials on three locations in the Czech Republic the impact of yellow, red and purple-fleshed potato cultivars in the years 2006 and 2007 was investigated as well as the effect of location conditions on antioxidant activity (AA) of tubers (expressed by ABTS assay in mg ascorbic acid 100 g⁻¹1 FM). The highest AA was determined in the darkly purple-fleshed cv. Violette (95.4 mg ascorbic acid·100 g⁻¹ FM). In the purple and red-fleshed cultivars, AA was on the average 2.9 times higher as compared to yellow-fleshed cultivars. Significant AA differences between purple and red-fleshed cultivars were found; the cultivars of the highest total anthocyanin content (TAC ranged from 18.6 to 64.1 mg·100 g⁻¹ FM) were reaching the highest AA values. The obtained results did not prove the impact of location on AA of tubers.

Differences in the content of major antioxidants contained in potatoes with various coloured tuber flesh

100%

Hamouz K., Lachman J., Dvorak P., Hejtmankova K., Vacek J.

Zeszyty Problemowe Postępów Nauk Rolniczych

2010

tom 557

The aim of this study was to examine the effect of genotype in a total of twelve varieties with purple- and red-fleshed tubers on the content of important antioxidants - total polyphenols (TP), ascorbic acid (AA) and total anthocyanins (TA). Precise field experiments were performed in 2008 and 2009 in the Czech Republic. Genotype of the variety showed a significant influence on the contents of the TP, AA and TA. Purple- and red-fleshed varieties reached 2.7 to 3.8 times higher content of the TP in comparison with control yellow-fleshed variety, difference between them has a maximum of 16.8%. The highest AA content in the group of the varieties with colored pulp showed the Highland Burgundy Red variety (233 mg·kg⁻¹ FM), which with other two varieties matched the yellow-fleshed control, for other varieties a decrease of 18.5 to 28.0% was demonstrated. The TA content varied in a wide range from 68.7 to 573.5 mg cyanidin·kg⁻¹ FM and corresponded with the intensity and color range of light-marbled flesh of tubers of each variety.

Ograniczanie wyników

2 Zeszyty Problemowe Postępów Nauk Rolniczych

2 Dvorak P.

2 Hamouz K.

2 Hejtmankova K.

2 Lachman J.

1 Cepl J.

1 Vacek J.

1 2010

1 2008

Wyniki wyszukiwania

Antioxidant activity in yellow and purple-fleshed potatoes cultivated in different climatic conditions

Differences in the content of major antioxidants contained in potatoes with various coloured tuber flesh