兴安落叶松树干中紫杉叶素的分布

Distribution of Taxifolin in Larix gmelinii Tree Trunk

摘要: 本文采用超声辅助提取的方法从兴安落叶松(Larix gmelinii)原料中提取紫杉叶素，考察了兴安落叶松树木的不同部位中紫杉叶素的含量差异。进而得出紫杉叶素在兴安落叶松中的分布情况。结果表明：横向紫杉叶素的含量心材的外侧靠近边材的部位最多，每克心材外侧的木粉中紫杉叶素的含量可达30 mg左右，心材的中部和内部其次，边材的含量较少，而树皮中紫杉叶素的含量最少，每克树皮木粉中的含量不到5 mg；纵向紫杉叶素的含量随高度的增加先减少后增多再减少，0米和6米处出现两个峰值。

Abstract: This article applies ultrasonic-assisted extraction method to extract taxifolin from Larix gmelinii, investigates the content of taxifolin in different parts of Larix gmelinii, and thus concludes the dis-tribution of taxifolin in Larix gmelinii. Result shows that: the highest content of transverse taxifolin was obtained in the outside part of heartwood which was close to the sapwood, and the content of taxifolin could reach 30 mg per gram powder, followed by the middle part and internal part of heartwood. In addition, less content of taxifolin was achieved in the sapwood, and the least content of taxifolin was found in the bark of Larix gmelinii, with less than 5 mg of taxifolin per gram bark powder. The content of longitudinal taxifolin firstly decreased, then increased and finally decreased with the increase in the height of Larix gmelinii, and two peak values were obtained in 0 m and 6 m, respectively.