EFFECT OF COOKING ON THE CONTENT OF CAROTENOIDS AND TOCOPHEROLS IN SWEET CORN

  • Snežana Mladenović Drinić Maize Research Institute Zemun Polje
  • Jelena Vukadinović
  • Jelena Srdić Maize Research Institute Zemun Polje
  • Marija Milašinović Šeremešić University of Novi Sad, Institute of Food Technology in Novi Sad
  • Violeta Andjelkovic Maize Research Institute Zemun Polje
Keywords: carotenoids, cooking, HPLC, sweet corn, tocopherols

Abstract


Taste and nutritional value make sweet corn a valued plant and an important component of the human diet worldwide. Kernel nutritive composition of sweet corn has been reported in various papers, but a description of carotenoid and tocopherols profile, especially after cooking is scarce. Therefore, the present study was carried out to compare the carotenoid and tocopherol content in sweet corn before and after cooking. Contents of β-carotene, lutein+zeaxanthin and tocopherols (δ-T, β+γ-T, α-T) in the kernels of twelve sweet corn hybrids were determined by High-Performance Liquid Chromatography (HPLC) and were expressed as the mean value of three independent measurements. Both genotype and cooking affected the content of the carotenoids and tocopherols in the kernel. The highest content of total carotenoids before and after cooking was found in hybrid ZP486/1su (27.77/45.28 µg/g) whereas the lowest content was in hybrid ZP 355su (10.27 µg/g) before cooking i.e. in hybrid ZP 347su (24.55 µg/g) after cooking. The cooking resulted in a significant increase in the content of total carotenoids and tocopherols, lutein+zeaxanthin, and β-carotene in all hybrids, except the ZP504su in which the β-carotene content decreased. An increase in α-tocopherol after cooking was observed in hybrids ZP485/1su and ZP484/1su, while a decrease was in hybrids ZP481/1su, ZP486/1su and ZP477/2su.

The results showed that increasing micronutrient content is genotype-dependent. This study confirmed that cooking increases the nutritional value of sweet corn and gives it additional value in terms of functional food.

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Published
2021/10/29
Section
Original research paper