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Conventional, organic and biodynamic farming: differences in polyphenol content and antioxidant activity of Batavia lettuce

Authors

  • Daniela Heimler,

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    1. Dipartimento di Scienze delle Produzioni Vegetali, del Suolo e dell'Ambiente Agroforestale, University of Florence, 50144 Florence, Italy
    • Dipartimento di Scienze delle Produzioni Vegetali, del Suolo e dell'Ambiente Agroforestale, University of Florence, Piazzale delle Cascine 18, 50144 Florence, Italy.
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  • Pamela Vignolini,

    1. Dipartimento di Scienze Farmaceutiche, University of Florence, 50019 Sesto Fiorentino, Florence, Italy
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  • Paola Arfaioli,

    1. Dipartimento di Scienze delle Produzioni Vegetali, del Suolo e dell'Ambiente Agroforestale, University of Florence, 50144 Florence, Italy
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  • Laura Isolani,

    1. Dipartimento di Scienze delle Produzioni Vegetali, del Suolo e dell'Ambiente Agroforestale, University of Florence, 50144 Florence, Italy
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  • Annalisa Romani

    1. Dipartimento di Scienze Farmaceutiche, University of Florence, 50019 Sesto Fiorentino, Florence, Italy
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Abstract

BACKGROUND:Lactuca sativa L. ssp. acephala L., cv. Batavia red Mohican plants were cultivated under intensive conventional, organic and biodynamic farming and were analyzed for their polyphenol content and antiradical activity in order to demonstrate the influence of farming on yield, polyphenol content and antiradical activity.

RESULTS: The yield of plants from conventional farming was the highest (2.89 kg m−2), while polyphenol content, measured by spectrophotometry, of these plants was lower at P < 0.05 (1.36 mg g−1) than the content of plants from organic and biodynamic farming (1.74 and 1.85 mg g−1, respectively). The antiradical activity, measured by DPPH · assay, was positively correlated to flavonoid and hydroxycinnamic acid contents.

CONCLUSION: Flavonoid, hydroxycinnamic acid and anthocyan patterns were not affected by the type of cultivation, while quantitative differences were demonstrated and some differences were found between conventional farming and organic or biodynamic farming. The yield of conventionally grown salads was the highest. Copyright © 2011 Society of Chemical Industry

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