Iodine Biofortification of Potato (Solanum tuberosum L.) Grown in Field

Iwona Ledwożyw-Smoleń,Sylwester Smoleń,Stanisław Rożek,Piotr Strzetelski,Włodzimierz Sady

doi:10.3390/agronomy10121916

Iwona Ledwożyw-Smoleń, Sylwester Smoleń + Show 3 more

Open Access

https://doi.org/10.3390/agronomy10121916

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Abstract

Despite wide prevention programmes, iodine deficiency remains a substantial problem in various populations around the world. Consumption of crop plants with increased iodine content may help supply additional amounts of that element in a daily diet. The aim of the work was to evaluate the efficiency of iodine biofortification of potato tubers. Soil application of KI and foliar application of KIO3 in doses up to 2.0 kg I ha−1 were tested in a three-year field experiment. Biomass, yield as well as dry matter, iodine, starch, and soluble sugar content in potato tubers were analyzed. No negative effect of tested methods of iodine application on potato yield or dry matter content was observed. Both soil and foliar application of iodine allowed to obtain potato tubers with increased content of that element with no decrease of starch or sugar content. The highest efficiency of iodine biofortification was noted for foliar spraying with KIO3 in a dose of 2.0 kg I ha−1. The obtained level of iodine in 100 g of potatoes could be sufficient to cover up to 25% of Recommended Daily Allowance for that element. The findings of the study indicate that potatoes biofortified with iodine can become an additional source of I in a daily diet.

Highlights

Iodine is a micronutrient crucial for the proper growth and development of human organisms.Despite wide programmes of the prevention of iodine deficiency diseases, the status of iodine nutrition in some populations still requires effective supplementation [1,2]
The statistical analysis of obtained results revealed no significant effect of applied treatments on total yield, percentage share of marketable yield, average weight of a single tuber and dry matter content of potato tubers (Tables 4 and 5)
The present three-year study reveals that soil application of KI and foliar application of KIO3 in doses up to 2.0 kg I ha−1 did not cause any significant drop in potato yield parameters

Summary

Introduction

Iodine is a micronutrient crucial for the proper growth and development of human organisms. Despite wide programmes of the prevention of iodine deficiency diseases, the status of iodine nutrition in some populations still requires effective supplementation [1,2]. The efficiency of that approach can be hardened by major factors, including iodine loss during salt manufacturing and storage [3], thermal processing [4], as well as growing awareness of the need to reduce salt consumption due to related health hazards [5]. It has been proposed that the consumption of crop plants with increased content of iodine in edible parts can improve its supply in a daily diet. The in-vivo studies have already confirmed the efficiency of that approach to increase iodine nutrition in human organisms [6]

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