<abstract xmlns="http://www.w3.org/1999/xhtml">The aim of the study was to evaluate the influence of various chemical forms of iodine (I− and IO3−) and selenium (SeO32− and SeO42−) on the nutritional and health-promoting quality of carrot (<italic>Daucus carota</italic> L.) storage roots. The experiment (conducted in 2012-2014) comprised the soil fertilization of carrot ‘Kazan’ F1 in the following combinations: 1. Control, 2. KI, 3. KIO3, 4. Na2SeO4, 5. Na2SeO3, 6. KI + Na2SeO4, 7. KIO3 + Na2SeO4, 8. KI + Na2SeO3, 9. KIO3+ Na2SeO3. Iodine and selenium were applied twice: before sowing and as top dressing in a total dose of 5 kg I ha−1 and 1 kg Se ha−1. No significant influence of iodine and selenium fertilization was noted with respect to average root weight and leaf yield. Each year, the application of KI + Na2SeO4 negatively affected the content of glucose and total sugars in carrot. An increased sucrose level was noted in the roots of plants treated with KIO3 + Na2SeO4, with a total sugar concentration comparable to the control. Irrespective of the year, carrots fertilized with KI were characterized by the highest accumulation of nitrates (III) – NO2− in roots. The simultaneous introduction of iodine and selenium compounds (KI + Na2SeO4, KIO3 + Na2SeO4, KI + Na2SeO3 and KIO3 + Na2SeO3) into the soil reduced the content of nitrates (III) in carrot as compared to combinations with the individual application of these compounds. The influence of the tested factors on other analysed parameters (the content of dry weight, nitrates (V), chlorides, oxalates, citrates, free amino acids, carotenoids, phenolic compounds, phenylpropanoids, flavonols and anthocyanins as well as free radical scavenging activity (DPPH) was rather year-dependent.</abstract>

The aim of the study was to evaluate the influence of various chemical forms of iodine (I− and IO3−) and selenium (SeO32− and SeO42−) on the nutritional and health-promoting quality of carrot (Daucus carota L.) storage roots. The experiment (conducted in 2012-2014) comprised the soil fertilization of carrot ‘Kazan’ F1 in the following combinations: 1. Control, 2. KI, 3. KIO3, 4. Na2SeO4, 5. Na2SeO3, 6. KI + Na2SeO4, 7. KIO3 + Na2SeO4, 8. KI + Na2SeO3, 9. KIO3+ Na2SeO3. Iodine and selenium were applied twice: before sowing and as top dressing in a total dose of 5 kg I ha−1 and 1 kg Se ha−1. No significant influence of iodine and selenium fertilization was noted with respect to average root weight and leaf yield. Each year, the application of KI + Na2SeO4 negatively affected the content of glucose and total sugars in carrot. An increased sucrose level was noted in the roots of plants treated with KIO3 + Na2SeO4, with a total sugar concentration comparable to the control. Irrespective of the year, carrots fertilized with KI were characterized by the highest accumulation of nitrates (III) – NO2− in roots. The simultaneous introduction of iodine and selenium compounds (KI + Na2SeO4, KIO3 + Na2SeO4, KI + Na2SeO3 and KIO3 + Na2SeO3) into the soil reduced the content of nitrates (III) in carrot as compared to combinations with the individual application of these compounds. The influence of the tested factors on other analysed parameters (the content of dry weight, nitrates (V), chlorides, oxalates, citrates, free amino acids, carotenoids, phenolic compounds, phenylpropanoids, flavonols and anthocyanins as well as free radical scavenging activity (DPPH) was rather year-dependent.

The quality of carrot (<italic>Daucus carota</italic> L.) cultivated in the field depending on iodine and selenium fertilization

Unit of Plant Nutrition, Institute of Plant Biology and Biotechnology Faculty of Biotechnology and Horticulture, University of Agriculture in Krakow, 29 Listopada 54, 31-425 Kraków,

Department of Fruit, Vegetable and Mushroom Processing, Faculty of Food Technology, University of Agriculture in Krakow, Balicka 122, 30-149 Kraków,

Unit of Biochemistry, Institute of Plant Biology and Biotechnology, Faculty of Biotechnology and Horticulture, University of Agriculture in Krakow, 29 Listopada 54, 31-425 Kraków,

Department of Engineering and Machinery in the Food Industry, Faculty of Food Technology, University of Agriculture in Krakow, Balicka 122, 30-149 Kraków,

Department of Human Nutrition, Faculty of Food Technology, University of Agriculture in Krakow, Balicka 122, 30-149 Kraków,

Folia Horticulturae

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

The quality of carrot ( L.) cultivated in the field depending on iodine and selenium fertilization

The aim of the study was to evaluate the influence of various chemical forms of iodine (I− and IO3−) and selenium (SeO32− and SeO42−) on the nutritional and...

The quality of carrot (Daucus carota L.) cultivated in the field depending on iodine and selenium fertilization

Published Online: Dec 28, 2016

Page range: 151 - 164

Received: Feb 17, 2016

Accepted: Jul 06, 2016

DOI: https://doi.org/10.1515/fhort-2016-0018

Keywords
biofortification, carotenoids, citrates, DPPH, oxalates, phenolic compounds, sugars

© 2016 Sylwester Smoleń et al., published by De Gruyter Open

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

The quality of carrot (Daucus carota L.) cultivated in the field depending on iodine and selenium fertilization

Published Online: Dec 28, 2016

Page range: 151 - 164

Received: Feb 17, 2016

Accepted: Jul 06, 2016

DOI: https://doi.org/10.1515/fhort-2016-0018

Keywordsbiofortification, carotenoids, citrates, DPPH, oxalates, phenolic compounds, sugars

© 2016 Sylwester Smoleń et al., published by De Gruyter Open

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Keywords
biofortification, carotenoids, citrates, DPPH, oxalates, phenolic compounds, sugars