Tissue Specific Expression Analysis of 19 Glycosyltransferase Genes Including <i>DN</i>19630 in <i>Bidens pilosa</i> var. Radiata

目的：通过分析白花鬼针草不同组织中候选糖基转移酶基因的表达规律，初步筛选可能参与聚多炔糖苷生物合成途径的糖基转移酶，为白花鬼针草的糖基转移酶基因的研究提供数据支持。方法：本研究利用白花鬼针草转录组数据库中的DN19630等19个候选糖基转移酶基因的DNA序列，设计特异性引物。通过qRT-PCR技术检测候选糖基转移酶基因在白花鬼针草叶、茎、果、花、根中相对表达量。结果：通过对DN19630等19个候选糖基转移酶基因PCR产物扩增情况、扩增曲线图、熔解曲线图及相对表达量进行综合分析，发现DN19630、DN18211、DN12914、DN6852、DN5000g2、DN38310、DN14409g1、DN5293、DN34556、DN14409g2、DN15831这11个候选糖基转移酶基因在叶中表达量相对较高，在根中表达量最低；而DN3608在茎中表达量最高，根中表达量较低；DN21732、DN14031在花中表达量较高，在根中表达量最低。结论：DN19630等14个糖基转移酶可能参与聚多炔糖苷类化合物的生物合成。Objective: By analyzing the expression patterns of candidate glycosyltransferase genes in different tissues of Bidens pilosa var. radiata, we initially screened the glycosyltransferases that may be involved in the biosynthetic pathway of polyacetylene glycosides, providing data support for the study of glycosyltransferase genes in B. pilosa var. radiata. Methods: This study used the DNA sequences of 19 candidate glycosyltransferase genes such as DN19630 from the transcriptome database of B. pilosa var. radiata to design specific primers. The relative expression levels of the selected glycosyltransferase genes in the leaves, stems, fruits, flowers, and roots of B. pilosa var. radiata were determined through qRT-PCR technology. Results: Through comprehensive analysis of the PCR product amplification status, amplification curves, melting curves, and relative expression levels of 19 candidate glycosyltransferase genes including DN19630, it was found that the expression levels of 11 candidate glycosyltransferase genes, namely DN19630, DN18211, DN12914, DN6852, DN5000g2, DN38310, DN14409g1, DN5293, DN34556, DN14409g2, and DN15831, were relatively high in leaves and lowest in roots. In contrast, DN3608 exhibited the highest expression level in stems and a lower expression level in roots. Additionally, DN21732 and DN14031 showed higher expression levels in flowers and the lowest expression levels in roots. Conclusion: A total of 14 glycosyltransferases, including DN19630, are potentially involved in the biosynthesis of polyene glycosides.