Observation on Dynamic Changes of Flavonoids Contents of Citrus grandis(L.)Osbeck var.tomentosa Hort / 广州中医药大学学报

ABSTRACT

【Objective】To observe the dynamic changes of flavonoids contents of Citrus grandis(L.)Osbeck var.tomentosa Hort..【Methods】The total flavonoid content was determined by spectral photometric analysis and naringin content by HPLC,and the fingerprints of Citrus grandis(L.)Osbeck var.tomentosa Hort.were studied by HPLC.【Results】With the increase of the fruit age,total flavonoid contents in the peel and the leaves of Citrus grandis(L.)Osbeck var.tomentosa Hort.decreased obviously.Fingerprints results showed that at the early fruit age the rhoifolin content in the peel increased with the fruit age and began to decrease 62 days later,while the rhoifolin content in the leaves showed no changes.【Conclusion】In terms of active components contents and economic value,the optimal collecting time for Citrus grandis(L.)Osbeck var.tomentosa Hort.is:young fruit,34 days,and immature fruit,55 days.