Antioxidant Capacity and Nutritional Value of Potato Tubers (Solanum tuberosum L.) as a Dependence of Growing Conditions and Long-Term Storage

Abstract

The aim of the study was to assess the interactive effect of the use of bio-fertilizer and organic matter brought into the soil, as well as to limit the use of mineral fertilization on the content of bioactive compounds in potato tubers cultivar ‘Satina’. The test results show a positive effect of the applied bio-fertilizer in all tested variants of organic fertilization (straw, fodder pea, manure) on the level of the tested compounds. Comparing the content of crude protein in tubers from plots where half the dose of mineral fertilization was applied, the use of bio-fertilizer increased the content of this component, especially after using straw. After 6 months of storage, organic fertilization had no significant effect on the protein content, while significant differences were found in tubers fertilized with mineral, in favor of the full dose of NPK fertilizers. The storage time increased the content of tyrosine, leucine, lysine, alanine, glutamic acid, and total AA, and also methionine, aspartic acid, and asparagine, while the content of isoleucine and phenyl-alanine decreased. The highest content of total polyphenols was found in tubers where the plots were covered with pea application, a full dose of mineral fertilizer, and the use of bio-fertilizer. Unfortunately, after 6 months of storage, potato tubers from plots fertilized with peas, especially those fertilized with half the dose of mineral fertilization and without the use of biofertilizer, significantly lost the most total polyphenols. Similar relationships were obtained for the level of chlorogenic acid in tubers, which is significantly correlated with the content of polyphenols, but only organic fertilization in the form of peas significantly increased the concentration of chlorogenic acid. On the other hand, the highest post-harvest antioxidant activity was characteristic of tubers from plots fertilized with manure, with a full dose of mineral fertilization and biofertilizer. During the 6-month storage, there was a decrease in the antioxidant capacity, on average 12.4% for the objects. This may indicate the influence of polyphenolic compounds as well as other antioxidants on the assessed trait.

The Content of Total Carotenoids, Vitamin C and Antioxidant Properties of 65 Potato Cultivars Characterised under the European Project ECOBREED

“…In the literature, can be find research showing a large variation of TAA among potato cultivars/clones, and many other factors having an impact on their level in potato tubers. For example, Wichrowska [46] reported a significantly differentiated TAA of potato tubers cv measured using the FRAP method. The highest TAA was characteristic of tubers from the plots fertilized with manure, a full dose of mineral fertilization and bio-fertiliser.…”

Application of vibrational and fluorescence spectroscopy to the compositional analysis of colored‐flesh potatoes

“…Potato ( Solanum tuberosum L.) is one of the most important food crops worldwide, with consumption exceeding 32 kg per capita 1,2 . Content of starch, essential amino acids and low fat concentration determine the nutritional value of potato tubers.…”

“…Content of starch, essential amino acids and low fat concentration determine the nutritional value of potato tubers. They are also a source of bioactive compounds, including ascorbic acid and polyphenols, with their concentrations of the same order of magnitude as in coffee, grapes, blueberries and almonds 2 . Potatoes with special culinary, economic and health attractiveness belong to varieties with red and purple flesh.…”

“…They are also a source of bioactive compounds, including ascorbic acid and polyphenols, with their concentrations of the same order of magnitude as in coffee, grapes, blueberries and almonds. 2 Potatoes with special culinary, economic and health attractiveness belong to varieties with red and purple flesh. They can be recommended for the consumption and production of fried and dried products due to their favorable taste, smell, texture and color, but also a higher content of biologically active compounds.…”

Health Parameters of Potato Tubers under the Influence of Soil Applied Bio-Preparations and Bio-Stimulants

“…The introduction of organic matter to soil is one of the more effective methods of restoring soil biodiversity and balance between populations of beneficial and pathogenic microorganisms [42,49,50]. Different types of microbiological preparations, effective microorganisms, and soil conditioners can play a similar role [51,52]. Many authors point out that their use in the cultivation of different plant species has had a positive effect on the yield, the content of nutrients, and bioactive substances [53][54][55][56][57].…”