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Increased Antioxidant Activity and Changes in Phenolic Profile of Kalanchoe pinnata (Lamarck) Persoon (Crassulaceae) Specimens Grown Under Supplemental Blue Light

Authors

  • Luana B. S. Nascimento,

    1. Centro de Ciências da Saúde, Instituto de Biologia, Departamento de Botânica, Universidade Federal do Rio de Janeiro, Cidade Universitária, Rio de Janeiro, Brazil
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  • Marcos V. Leal-Costa,

    1. Centro de Ciências da Saúde, Instituto de Biologia, Departamento de Botânica, Universidade Federal do Rio de Janeiro, Cidade Universitária, Rio de Janeiro, Brazil
    2. Programa de Pós-graduação em Biotecnologia Vegetal, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
    3. Instituto Federal de Educação, Ciência e Tecnologia Fluminense, Rio de Janeiro, Brazil
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  • Marcela A. S. Coutinho,

    1. Núcleo de Pesquisas de Produtos Naturais, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
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  • Nattacha dos S. Moreira,

    1. Centro de Ciências da Saúde, Instituto de Biologia, Departamento de Botânica, Universidade Federal do Rio de Janeiro, Cidade Universitária, Rio de Janeiro, Brazil
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  • Celso L. S. Lage,

    1. Programa de Pós-graduação em Biotecnologia Vegetal, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
    2. DART/COPEPI, Praça Mauá, Centro, Instituto Nacional da Propriedade Industrial (INPI), Rio de Janeiro, Brazil
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  • Nancy dos S. Barbi,

    1. Faculdade de Farmácia, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
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  • Sônia S. Costa,

    1. Núcleo de Pesquisas de Produtos Naturais, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
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  • Eliana S. Tavares

    Corresponding author
    1. Programa de Pós-graduação em Biotecnologia Vegetal, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
    • Centro de Ciências da Saúde, Instituto de Biologia, Departamento de Botânica, Universidade Federal do Rio de Janeiro, Cidade Universitária, Rio de Janeiro, Brazil
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Corresponding author email: elianast@gmail.com (Eliana Schwartz Tavares)

Abstract

Antioxidant compounds protect plants against oxidative stress caused by environmental conditions. Different light qualities, such as UV-A radiation and blue light, have shown positive effects on the production of phenols in plants. Kalanchoe pinnata (Lamarck) Persoon (Crassulaceae) is used for treating wounds and inflammations. Some of these beneficial effects are attributed to the antioxidant activity of plant components. We investigated the effects of blue light and UV-A radiation supplementation on the total phenol content, antioxidant activity and chromatographic profile of aqueous extracts from leaves of K. pinnata. Monoclonal plants were grown under white light, white plus blue light and white plus UV-A radiation. Supplemental blue light improved the antioxidant activity and changed the phenolic profile of the extracts. Analysis by HPLC of supplemental blue-light plant extracts revealed a higher proportion of the major flavonoid quercetin 3-O-α-l-arabinopyranosyl (1→2) α-l-rhamnopyranoside, as well as the presence of a wide variety of other phenolic substances. These findings may explain the higher antioxidant activity observed for this extract. Blue light is proposed as a supplemental light source in the cultivation of K. pinnata, to improve its antioxidant activity.

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