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OBJECTIVE To establish a callus culture system for dedifferentiation of Mahonia fortunei (Lindl.) in order to screen the key genes involved in the biosynthesis of jatrorrhizine. METHODS The contents of benzylisoquinoline alkaloids in callus at different dedifferentiation stages were determined by HPLC. Transcriptome was used to analyze the gene expression profiles of callus at different dedifferentiation processes and identify the differentially expressed genes. By analyzing the relationship between the variation of alkaloid content and the differentially expressed genes, the key genes involved in the biosynthesis of jatrorrhizine were screened. RESULTS The contents of columbamine, palmatine, jatrorrhizine and berberine increased in varying degrees during the dedifferentiation of Mahonia fortunei (Lindl.) leaves, among which jatrorrhizine increased significantly. By comparing and analyzing the transcripts of the leaves of Mahonia fortunei (Lindl.) and samples from different dedifferentiated stages, differential expression genes between different dedifferentiated stage samples were screened. Furthermore, through KEGG enrichment analysis, cluster analysis, 25 differentially expressed genes involved in jatrorrhizine biosynthesis pathway were annotated, among which NCS, 7OMT, CNMT, BBE, CAS, STOX may be potential key genes. CONCLUSION During the dedifferentiation period, the contents of columbamine, palmatine, jatrorrhizine and berberine all increase, among which the contents of jatrorrhizine increases the most significantly. Callus culture can be used as a method to produce benzyl isoquinoline alkaloids such as jatrorrhizine.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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