杜仲雄花中次生代谢物合成积累的动态变化

对杜仲(Eucommia ulmoides Oliv.)雄株不同花期雄花中次生代谢产物含量进行分析测定,并对杜仲雄花次生代谢的生理基础及不同花期次生代谢产物含量差异进行了探讨.研究结果表明,雄花在不同花期次生代谢产物含量均有差异.总黄酮含量在花蕾期最高(4.010%),始花期最低(2.422%),从盛花期到末花期逐渐上升;桃叶珊瑚苷和绿原酸含量均在花蕾期最高(分别为2.351%和1.075%),盛花期最低(分别为1.463%和0.503%),至末花期含量上升;京尼平苷酸含量在始花期最低(0.217%),从盛花期开始逐渐升高,至末花期高达1.403%;次生代谢产物总量也以花蕾期为最高(7.420%).杜仲雄花的花蕾期和盛花期是兼顾质量和产量的最佳采摘期.

Dynamic changes of secondary metabolites in Eucommia ulmoides male flower

The contents of secondary metabolites in male flower of Eucommia ulmoides Oliv.at different blossoming stages were determined and analyzed.The physiological basis and content difference of the second metabolite in male flower were discussed.The results showed that differences existed in the contents of all second metabolites measured in male flower at different blossoming stages.The content of flavonoids was the highestat the bud stage(4.010%) and the lowestat the initial blossoming stage(2.422%),wtih a tendency of gradual increment from the fully blossoming stage to the final one;the contents of aucubin and chlorogenic acid were the highest at the bud stage(2.351% and 1.075% respectively),and the lowest at the fully blossoming stage(1.463% and 0.503% respectively),and increased at the final one;the content of geniposidic acid was the lowest at the initial blossoming stage(0.217%),and gradually increased from the fully blossoming stage and reached to 1.403% at the final one;the content of total second metabolites at the bud stage was the highest(7.420%).The results indicated that considering both quality and quantity of male flower,the feasible picking periods were at the bud stage or the fully blossoming stage.