脱落酸对甘草化学成分含量和颜色的影响

Effects of abscisic acid on chemical components content and color of Glycyrrhiza uralensis

该试验拟以栽培甘草为材料,不同浓度ABA叶面喷施,5个时间点取样,研究ABA对甘草化学成分含量和颜色的影响。结果发现,ABA施加后甘草45 d内甘草酸、甘草苷的含量均有一定程度的提高,以甘草苷含量变化更为显著。其中高浓度ABA(3.96 mg·L-1)施加使得甘草酸的质量分数30 d内从(1.099±0.108)%上升至(1.665±0.319)%,上升幅度为52%;甘草苷的质量分数30 d内从(0.353±0.090)%上升至(1.738±0.428)%,上升幅度为392%,二者均在45 d时有明显的下降趋势。高浓度ABA(3.96 mg·L-1)施加后45 d内甘草粉末的颜色指标a*,b*较对照组有显著的升高,即甘草粉末色泽加深,偏红黄两色。由此得出结论为高浓度ABA(3.96 mg·L-1)叶面施加不仅能够提高以颜色为指标传统认知上的质量,又能提高以甘草酸、甘草苷含量为指标现代认知上的质量。

An experiment was conducted using cultivated Glycyrrhiza uralensis in age of one year to study the effects of abscisic acid （ABA） on chemical components content and color of G. uralensis. By using different concentrations of ABA spraying on leaves, the change of the chemical component content was analyzed within 45 d after ABA stimulation, and the effects on quality were studied com- bined with colorimetric analysis data. It turned out that in some sense the content of glycyrrhizic acid and liquiritin had increased within 45 d, especially for liquiritin. After high concentrations of ABA （3.96 mg ·L^-1 ） stimulating, the content of glycyrrhizic acid rose 52% while liquiritin up 392% within 30 d. Then they both showed a decline in the content of glycyrrhizic acid and liquiritin on 45 d. Color index values of a ^＋ and b^＋ were all significantly higher than that of the control group within 45 d, which meant the color of pow- ders turned toward red and yellow. The conclusion was that ABA （3.96 mg ·L^-1 ） stimulating could not only improve the quality in the traditional sense through the color of G. uralensis, but also in the modern sense by improving the content of glycyrrhizic acid and liquiritin.