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<p>The use of sweet corn as fresh and processed vegetable is gaining worldwide popularity. Nevertheless, the conventional varieties of sweet corn lack provitamin A (proA) and vitamin E in kernels. Here, a novel set of biofortified sweet corn hybrids developed through marker-assisted introgression of mutant version of <i>crtRB1</i> and <i>vte4</i> genes were analyzed under three sowing dates for accumulation pattern of proA carotenoids and tocopherols (vitamin E) in kernels at 20-, 24- and 28- days after pollination (DAP). Across the sowing and harvest time, biofortified sweet corn hybrids recorded significantly higher β-carotene (BC: 13.39&#xa0;µg/g), β-cryptoxanthin (BCX: 9.73&#xa0;µg/g), provitamin-A (proA: 18.26&#xa0;µg/g), α-T (21.66&#xa0;µg/g), γ-tocopherol (γ-T: 38.69&#xa0;µg/g) and α/γ-tocopherol ratio (α/γ-T: 0.56) over original sweet corn hybrids (BC: 1.56&#xa0;µg/g, BCX: 2.41&#xa0;µg/g, proA: 2.77&#xa0;µg/g, α-T: 10.23&#xa0;µg/g, γ-T: 30.72&#xa0;µg/g and α/γ-T: 0.33). Nutritional traits varied significantly with alterations in sowing and harvest time. Accumulation of BC, BCX and proA was highest at 20-DAP, whereas kernel brix, α-T, γ-T and α/γ-T recorded peak at 24-DAP. The study identified 24-DAP as the optimum harvest time to harness better nutrition from biofortified sweet corn varieties. The concentrations of these nutritional phytochemicals also increased with later dates of sowing. This is the first report of dynamic accumulation of proA and vitamin-E in developing kernels of biofortified sweet corn.</p>

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Unravelling the temporal accumulation of provitamin-A carotenoids and tocopherols during kernel development in biofortified sweet corn hybrids

  • 期刊论文

  • 发表日期：

    2026年7月15日

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  • Hema S. Chauhan,
  • Vignesh Muthusamy,
  • Tuhin Rashmi,
  • Brijesh K. Mehta,
  • Subhra J. Mishra,
  • Abhijit K. Das,
  • Rajkumar U. Zunjare,
  • Ashok K. Singh,
  • Hari S. Gupta,
  • Firoz Hossain

摘要

The use of sweet corn as fresh and processed vegetable is gaining worldwide popularity. Nevertheless, the conventional varieties of sweet corn lack provitamin A (proA) and vitamin E in kernels. Here, a novel set of biofortified sweet corn hybrids developed through marker-assisted introgression of mutant version of crtRB1 and vte4 genes were analyzed under three sowing dates for accumulation pattern of proA carotenoids and tocopherols (vitamin E) in kernels at 20-, 24- and 28- days after pollination (DAP). Across the sowing and harvest time, biofortified sweet corn hybrids recorded significantly higher β-carotene (BC: 13.39 µg/g), β-cryptoxanthin (BCX: 9.73 µg/g), provitamin-A (proA: 18.26 µg/g), α-T (21.66 µg/g), γ-tocopherol (γ-T: 38.69 µg/g) and α/γ-tocopherol ratio (α/γ-T: 0.56) over original sweet corn hybrids (BC: 1.56 µg/g, BCX: 2.41 µg/g, proA: 2.77 µg/g, α-T: 10.23 µg/g, γ-T: 30.72 µg/g and α/γ-T: 0.33). Nutritional traits varied significantly with alterations in sowing and harvest time. Accumulation of BC, BCX and proA was highest at 20-DAP, whereas kernel brix, α-T, γ-T and α/γ-T recorded peak at 24-DAP. The study identified 24-DAP as the optimum harvest time to harness better nutrition from biofortified sweet corn varieties. The concentrations of these nutritional phytochemicals also increased with later dates of sowing. This is the first report of dynamic accumulation of proA and vitamin-E in developing kernels of biofortified sweet corn.