The changes of the polyphenol content and antioxidant activity in potato tubers (Solanum tuberosum L.) due to nitrogen fertilization

Diana Hrabovská; Peter Kováčik; Zuzana Poláková; Jaromír Lachman; Judita Bystrická; Janette Musilová

<div><table style="height: 384px;" border="0" cellspacing="0" cellpadding="0" width="498" align="left"><tbody><tr><td style="padding-top:3.1pt;padding-right: 0cm;padding-bottom:3.1pt;padding-left:0cm" height="384" align="left" valign="top"><div style="mso-element:para-border-div;border:none;border-bottom:solid windowtext 2.25pt; padding:0cm 0cm 1.0pt 0cm"><p style="margin-top:4.8pt;margin-right:0cm;margin-bottom:6.0pt;margin-left: 0cm;text-align:justify;text-justify:inter-ideograph;line-height:115%; border:none;mso-border-bottom-alt:solid windowtext 2.25pt;padding:0cm; mso-padding-alt:0cm 0cm 1.0pt 0cm;mso-element:frame;mso-element-frame-width: 498.1pt;mso-element-frame-height:377.35pt;mso-element-frame-vspace:3.1pt; mso-element-wrap:around;mso-element-anchor-vertical:page;mso-element-anchor-horizontal: page;mso-element-left:50.3pt;mso-element-top:57.8pt;mso-height-rule:exactly"><span style="font-size:10.0pt;line-height:115%;mso-ansi-language:EN-GB; mso-bidi-font-weight:bold" lang="EN-GB">Cultivar is one of the most important internal factors affecting polyphenol concentration in the plants. However, influence of the grown locality, climate conditions and way of cultivation belong to important external factors. In our experiment the influence of different nitrogen doses (0 - 40 - 80 - 120 - 160 - 240 kg N.ha<sup>-1</sup>) applied in the form of Vermikompost on the total polyphenol content and derived total antioxidant activity in cv. Sorento were investigated. While in the 1<sup>st</sup> - 5<sup>th</sup> variants the determined polyphenol content in dry mater of potato tubers decreased from 399.2 to 70.40 mg.kg<sup>-1</sup>, in the 6<sup>th</sup> variant that was twice higher in comparison to the 5<sup>th</sup> variants (135.6 mg.kg<sup>-1</sup>). The statistically significant differences in values of total polyphenol content between variants (polynomial function of 2<sup>nd</sup></span><span class="hps"><span style="font-size:10.0pt;line-height:115%; mso-ansi-language:EN-GB" lang="EN-GB"> degree</span></span><span style="font-size:10.0pt;line-height:115%;mso-ansi-language:EN-GB;mso-bidi-font-weight: bold" lang="EN-GB">) were confirmed. The study also confirmed a strong statistical correlation between the content of polyphenols and the content of antioxidant activity has been confirmed <br /> (sign. F: 3.24E<sup>-10</sup>). The highest value of antioxidant activity was observed in the first variant. From the first to the fifth variant (7.62 - 4.84%), the value of antioxidant activity was decreasing and in the sixth variant this value increased to 6.31%.</span><strong><span style="font-size:10.0pt;line-height:115%;mso-ansi-language:EN-US" lang="EN-US"></span></strong></p></div></td></tr></tbody></table></div>

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The changes of the polyphenol content and antioxidant activity in potato tubers (Solanum tuberosum L.) due to nitrogen fertilization

2013

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The changes of the polyphenol content and antioxidant activity in potato tubers (Solanum tuberosum L.) due to nitrogen fertilization

2013

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