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Effects of Harvesting Date and Climate on the Flavonoid and Carotenoid Contents of Marigold (Calendula officinalis L.)
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1997
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Plant AnalysisCarotenoidEngineeringBotanyItalian TypeAgricultural EconomicsMarigold PetalsCarotenoid ContentsPhotodiode Array DetectorPhytochemistryPhytochemicalPlant PhysiologyHorticultural Science
The flavonoid and carotenoid contents and agronomic parameters of an Italian type of marigold (Calendula officinalis L.) were evaluated over a 2-year trial performing two annual cuts during the flowering period. The flavonoids and carotenoids of the marigold petals were characterized by HPLC with a photodiode array detector. The number of flower heads per plant and the yield of heads and petals were always higher in the second cut, but the pigment content greatly differed in the 2 years. Glycosides of quercetin and isorhamnetin were the predominant components of the flavonoids, while β-carotene and lutein were the most abundant carotenoids. © 1997 John Wiley & Sons, Ltd.