Dynamics Analysis of the Polyphenols Accumulation in Different Parts of Lactuca indica L.
To analyze the distribution characteristics and accumulation dynamics of polyphenols in Lactuca indica L.cv.Mengzao at different growth stage in this study,ultrasonic extraction and liquid chromatography-mass spectrometry(UPLC-MS)were used to extract the total flavonoids and total phe-nols from different parts(stems,leaves,flowers and seeds)of Lactuca indica L.cv.Mengzao,and their main components were quantitatively analyzed.The results showed that the contents of total flavonoids and total phenols in different parts of Lactuca indica L.cv.Mengzao in the vegetative growth stage were as fol-lows:leaf>stem,and leaf>flower>stem in reproductive growth stage.The contents of total flavonoids and total phenols were mainly accumulated in leaves and flowers,and reached the highest at flowering stage,which was the optimal harvest stage.There were some differences in the types and contents of poly-phenols in different parts of Lactuca indica L.cv.Mengzao.Chicory acid and rutin were the main active components of Lactuca indica L.cv.Mengzao.This study provided a theoretical basis for the development and utilization of Lactuca indica L.cv.Mengzao as a feed additive.
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