硫磺熏蒸对亳菊化学成分的影响

Study on effects of sulfur fumigation on chemical constituents of Chrysanthemum morifolium cv. Boju

该实验采用HPLC-ESI-MSn对硫磺熏蒸与晒干的亳菊进行定性比较,共指认了32个化合物。同时,采用HPLC技术对绿原酸、木犀草苷、异绿原酸A、木犀草素、芹菜素、香叶木素及金合欢素7个化合物进行定量比较,研究结果发现硫熏前后亳菊在化学组成上无较大差别,但是在含量上存在显著差异,硫熏后,黄酮苷类及奎宁酸类成分的含量降低,而黄酮苷元的含量升高;进一步对硫熏与晒干亳菊进行主成分分析(PCA)及偏小二乘聚类判别模式分析(PLS-DA),PCA分析结果显示,6批亳菊样品聚成2组,分别为晒干组和硫熏组;通过PLS-DA分析提取出对硫熏前后亳菊分组贡献率大于1(VIP>1)的3个成分,分别为芹菜素、木犀草素和异绿原酸A。该实验结果表明硫熏对亳菊化学成分具有显著影响。

A comprehensively comparison of the chemical profiles between sun-drying BJ （NBJ） and sulfur-fumigated BJ （SBJ） was conducted by HPLC analysis and the discrepant peaks were identified or tentatively assigned by HPLC-ESI-MSn. A total of 32 chemical components were used for qualitative comparison. Meanwhile, a quantitative comparison of BJwere conducted by HPLC analysis and de- termining seven compounds from 3 NBJ and 3 SBJ samples dramatic chemical changes were found. After sulfur fumigation, the contents of flavonoids glycosides and phenolic acids were remarkably reduced, but the contents of flavonoids aglycones were significantly in- creased. Multivariate statistics, including principle component analysis （PCA） and partial least squares discriminate analysis （PLS- DA） were used to investigate the potential damaging effect of sulfr-fumigating process. The PCA score plots showed six samples were clearly classified into the sun-drying and sulfur-fumigating groups. And according to VIP 〉 1, the most important chemical markers were apigenin, luteolin and 3,5-dicaffeoylquninic acid which could be used to distinguish NBJ and SBJ samples. Combining the results of qualitative and quantitative analysis, it showed that the sulfur fumigation has a significant effect on BJ.