五种化感物质对人参幼根皂苷含量的影响

采用比色法测定了人参根系分泌物中苯甲酸、邻苯二甲酸二异丁酯、丁二酸二异丁酯、棕榈酸和2，2-二(4-羟基苯基)丙烷在1mg·L-1、0.1mg·L-1和0.01mg·L-1浓度下对人参幼根总皂苷含量的影响。试验结果表明，酚酸类化感物质能够降低人参皂苷含量，且随浓度增加，人参皂苷含量明显减少。研究结果说明酚酸类化感物质不仅对人参种子萌发、幼苗生长具有自毒作用，而且对人参有效成分的含量有显著影响。

Effects of Five Allelochemicals on Ginsenosides in Ginseng Seedling Roots

The effects of diisobutyl succinate, 1,2-benzenedicarboxylic acid bis (2-methylpropyl) ester, palmitic acid, and 2,2-bis(4-Hydroxyphenyl) propane on ginsenosides in ginseng seedling roots at 1 mg·L-1, 0.1 mg·L-1 and 0.01 mg·L-1 were assessed using the colorimetric method. Results showed that allelochemicals could affect the concentration of ginsenosides in ginseng seedling roots. Phenolic acid chemicals could noticeably reduce the content of ginsenosides, when its concentration reached a given level. It is concluded that allelochemicals in the root exudates not only affect the seed germination, seedling growth, and the physiological and biochemical indicators, but also have a bearing on the concentration of ginsengsides.