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Progress of Studies on Growth Characteristic of Hawthorn Fruit

Qi Xiujuan,Li Zuoxuan(Horticulture College,Shenyang Agriculture University,Liaoning Shenyang 110161,China)  
Hawthorn has apomixes characteristic with a high rate of non-seed fruit.Its growth curve presents one pair of"S".With the development of fruit,the content of soluble sugar and organic acid increased gradually,the content of tannin decreased gradually,the content of Vc increased firstly then decreased.The flavonol and chlorogenic acid are main components in hawthorn,the content of flavonol showed three times of peaks at all growth period while the contents of chlorogenic acid decrease firstly then increased slightly at end of growth.Ca contents showed a steady decrease at all growth period,however the contents of Cu,Fe,Mn,Mg decreased firstly,then kept constant,finally decreased again,the contents of Zn,K showed a trend of decrease-increase-decrease.
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