Primary Studies On Chemical Compositions Of Overground Organ Of Tilia Amurensis

Tilia amurensis is a kind of lofty defoliate arbor which belongs to Tilia of Tiliaceae, its use is extensive and its economic value is high, it belongs to the second rank preserve. T. amurensis is also one of main plants for honey resources. In this paper, the chemical compositions in flowers, leaves, branch peel, xylem and bark were detected through systemic pre-experiments, and polysaccharides, sugar, flavone and total phenol content in flowers, leaves, branch peel, xylem and bark were determined according to the results of pre-experiments.We detected polysaccharides, glucosides, organic acid, hydroxybenzenes and coumarins in flowers, leaves, branch peel, xylem and bark through systemic pre-experiments. Flavone compounds were detected in flowers, leaves, branch peel and bark. Moreover, cardiac glycosides were also detected in flowers, leaves, branch peel and bark..The changing uptrend of polysaccharides content was coincident with sugar, and presented increasing uptrend from samlping to flowers peroid, following decreasing. The polysaccharides of leaves, branch peel, bark and xylem presented increasing uptrend fluctuatedly from May to August, following increasing obviously. The changing uptrend of sugar content in each organ was coincident basically with polysaccharides content. The changes of flavone content in flowers not very fluctuated, presented increasing uptrend completely. The flavone content in leaves presented decreasing uptrend, following increasing, the flovone content in branch peel, bark and xylem changed fluctuatedly from May to August, but presented decreasing uptrend from September. The total phenol content in flowers presented changing uptrend fluctuatedly, the total phenol content held the line from sampling to the end of sampling. The total phenol content in leaves presented "W" changing uptrend, following decreasing uptrend in the early ten days of October., following increasing, The total phenol content in branch, bark and xylem changed flucruatedly in the growing days, but presented increasing uptrend after the growing days.The polysaccharides, sugar, flavone and total phenol content in T. amurensis flowers were all higher than that in leaves, branch peel,.xylem and bark. The polysaccharides in bark was the highest(except July, August), following the branch peel, leaves and xylem was the lowest except flowers. The sugar in leaves was the highest in June, July, September, following the branch peel(except July), and the bark and xylem was the lowest, the sugar was the highest in branch peel in August, November and December, and the bark was the highest in May and Octomber. The flavone content in leaves was the highest in July, September and October, the branch peel was the highest in May, June, August, November and December, following the bark(except August), it was the lowest in leaves and xylem. The total phenol content in branch peel was the highest in the May, August, September, November and December except flowers, following the branch peel, and the bark and the xylem was the lowest, it was the highest in bark from June, July and Octomber, following the branch peel, the leaves and the xylem was the lowest.