Changes in Phenolic Compounds in Garlic (<Emphasis Type="Italic">Allium sativum</Emphasis> L.) Owing to the Cultivar and Location of Growth |
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Authors: | Victor Manuel Beato Francisco Orgaz Francisco Mansilla Alfredo Montaño |
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Institution: | 1.Instituto de la Grasa, Consejo Superior de Investigaciones Científicas (CSIC),Seville,Spain;2.Instituto de Agricultura Sostenible,Consejo Superior de Investigaciones Científicas (CSIC),Córdoba,Spain;3.Instituto de Investigación y Formación Agraria, Pesquera,Alimentaria y de la Producción Ecológica (IFAPA),Córdoba,Spain |
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Abstract: | The contents of total phenolic compounds, flavonoids, and phenolic acids were determined in selected garlic cultivars grown
at four locations. The total phenolic content varied from 3.4 mg gallic acid equivalents (GAE)/g of dry matter (dm) to 10.8 mg
GAE/g of dm with a mean value of 6.5 mg GAE/g of dm. The myricetin, quercetin, kaempferol, and apigenin flavonoids were not
detected in any of the samples. Caffeic acid and ferulic acid were the major phenolic acids found with mean values of 2.9 mg/kg
of dm and 2.6 mg/kg of dm, respectively. The mean contents of vanillic, p-hydroxybenzoic, and p-coumaric acids were comparable (0.4–0.8 mg/kg of dm), and the level of sinapic acid was negligible (< 0.1 mg/kg of dm). There
was a significant effect of location but an insignificant effect of genotype on contents of caffeic, vanillic, p-hydroxybenzoic, and p-coumaric acids. However, genotype but not location affected the contents of total phenolics and ferulic acid. On average,
the white garlic cultivars and Chinese garlic cultivars contained higher contents of total phenolics and ferulic acid than
the purple garlic cultivars. However, the differences in the total phenolic content between the purple and white garlic cultivars
were not significant. |
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