JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2021, Vol. 45 ›› Issue (4): 83-89.doi: 10.12302/j.issn.1000-2006.202006060

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Contents of the total saponins and total flavonoids in different organs of Sapindus mukorossi

XU Yuanyuan1(), ZHOU Siwei1, CHEN Zhong1, ZHAO Guochun1, LIU Jiming1, WANG Lixian1, WANG Xi1, JIA Liming1,*(), ZHANG Duanguang2   

  1. 1. Key Laboratory of Silviculture and Conservation of the Ministry of Education, National Energy R&D Center for Non-food Biomass, College of forestry, Beijing Forestry University, Beijing 100083, China
    2. Yuanhua Forestry Biotechnology Co., Ltd., Jianning 354500, China
  • Received:2020-06-30 Accepted:2020-08-08 Online:2021-07-30 Published:2021-07-30
  • Contact: JIA Liming E-mail:yuanyuanxu_2016@163.com;jlm@bjfu.edu.cn

Abstract:

【Objective】Our aim was to study the contents of total saponins and total flavonoids in different organs, and their accumulation characteristics, in the leaves of soapberry (Sapindus mukorossi). We also aimed to analyze the correlations between them. This was done to provide a reference for the comprehensive and efficient utilization of S. mukorossi.【Method】The contents of total saponins and flavonoids in the flowers, fruits, branches, roots and leaves at eight growth stages of S. mukorossi were determined by spectrophotometry. 【Result】The total saponin and total flavonoid contents varied among the different organs. The levels of the total saponins in different organs (0.98%-13.26%) were significantly higher than those of the total flavonoids (0.31%-1.74%). The total saponin content in the pericarp was the highest (13.26%), followed by that in the flowers (5.68%-6.21%) and leaves (4.11%, the average of eight growth stages). The order of total flavonoid content in each organ was as follows: leaf (1.74%, the average of eight growth stages), flower bud (0.88%), flower (0.74%), root (0.53%), branch (0.44%) and pericarp (0.31%). The accumulation rules of the total saponins and total flavonoids in the leaves were different at different stages of the annual growth cycle. Overall, the total saponin content increased gradually and the total flavonoid content fluctuated. Furthermore, there was a negative correlation between the total saponin and total flavonoid content. 【Conclusion】The distribution of the total saponins and total flavonoids in different organs, and their accumulation characteristics in leaves, are different. Moreover, here may be an indirect competitive relationship between the accumulation of saponins and flavonoids. In addition to the pericarp, flowers and leaves are the main organs for the accumulation of saponins and flavonoids, which have a certain application value that can be reasonably collected and utilized.

Key words: soapberry (Sapindus mukorossi), organ, saponins, flavonoids

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