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Optimization of the Duration and Intensity of UV-A Radiation to Obtain the Highest Free Phenol Content and Antioxidant Activity in Sprouted Sorghum (Sorghum bicolor L. Moench)

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Abstract

Technologies such as UV-A radiation applied to sprouted sorghum can stimulate the synthesis or release of phenolic compounds. Since the optimal conditions for stimulating the formation of these compounds in sorghum sprouts are unknown, we used the response surface methodology to identify the optimal conditions of irradiation duration and intensity to obtain the highest free phenol content and antioxidant activity in sprouted sorghum. The results showed that, compared with nonirradiated sorghum sprouts, sprouts irradiated under the optimal duration of 11.7 h and the optimal intensity of 5.4 µW/cm2 had a significantly higher phenol content (26.3%) and antioxidant activity as measured by DPPH (28.3%) and TEAC (21.1%) assays. Our findings suggest that UV-A radiation can help develop sorghum sprouts with high biological potential that can be used to produce healthy foods for human consumption.

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Acknowledgements

A. A. Ruiz Hernández received a scholarship from CONACyT (National Research and Technology Council), Mexico.

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Authors and Affiliations

  1. Departamento de Investigación y Posgrado en Alimentos, Universidad de Sonora, Blvd. Luis Encinas y Rosales, Colonia Centro, Hermosillo, Sonora, 83000, México

    Alan A. Ruiz Hernández, Ofelia Rouzaud Sández & Maribel Robles Sánchez

  2. Instituto de Ciencia y Tecnología de Alimentos y Nutrición, Calle José Antonio Novais, 10, Madrid, 28040, España

    Juana Frías

  3. Centro de Investigación en Alimentación y Desarrollo, A.C., Carretera Gustavo Enrique Astiazarán Rosas, No. 46, Colonia La Victoria, Hermosillo, Sonora, 83304, México

    Fernando Ayala Zavala & Humberto Astiazarán García

Authors
  1. Alan A. Ruiz Hernández
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  2. Ofelia Rouzaud Sández
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  3. Juana Frías
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  4. Fernando Ayala Zavala
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  5. Humberto Astiazarán García
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  6. Maribel Robles Sánchez
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Correspondence to Maribel Robles Sánchez.

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Ruiz Hernández, A.A., Rouzaud Sández, O., Frías, J. et al. Optimization of the Duration and Intensity of UV-A Radiation to Obtain the Highest Free Phenol Content and Antioxidant Activity in Sprouted Sorghum (Sorghum bicolor L. Moench). Plant Foods Hum Nutr 77, 317–318 (2022). https://doi.org/10.1007/s11130-021-00938-z

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  • DOI: https://doi.org/10.1007/s11130-021-00938-z

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