Influence of environmental conditions and way of cultivation on the polyphenol and ascorbic acid content in potato tubers
1999
Hamouz, K. | Lachman, J. | Pivec, V. (Ceska Zemedelska Univ., Prague-Suchdol (Czech Republic)) | Vokal, B.
In 1995 till 1997 field trials were conducted to study the influence of environmental conditions of regions with different altitudes, variety, year and ecological way of cultivation on total polyphenol content (in Agria and Karin variety) and ascorbic acid (in seven varieties after five months of storage) in potato tubers. In three year trials significantly higher total polyphenol content was determined (46.25 mg.100 g-1) in potato tubers from traditional potato regions of the Czech Republic with higher altitude (cooler and more humid). Highly significant differences of total polyphenol contents were found between two used varieties. In potatoes cultivate in ecological way in three year period higher total polyphenol content in tubers (47.64 mg.100 g-1) was found than in potatoes cultivated in conventional way (43.20 mg.100 g-1). Our experiments have not proved dependence of ascorbic acid content on different ecological conditions. Significant influence on ascorbic acid content has shown the variety.
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