Unlabelled: The dried root of is a traditional Chinese herbal medicine mainly used to treat lung diseases and plays an important role in fighting coronavirus disease 2019 pneumonia in China. This study focused on the key enzyme gene for furanocoumarin synthesis in . In the 35S: transgenic study, the -overexpressing gene was more salt-tolerant than in the blank group. Metabolomics analysis showed 30 differential metabolites in , which overexpressed the gene. Twelve coumarin compounds were significantly upregulated, and six of these coumarin compounds were not detected in the blank group. Among these differential coumarin metabolites, isopimpinellin and aesculetin have been annotated by the Kyoto Encyclopedia of Genes and Genomes and isopimpinellin was not detected in the blank group. Through structural comparison, imperatorin was formed by dehydration and condensation of zanthotoxol and a molecule of isoprenol, and the difference between them was only one isoprene. Results showed that the gene positively regulated the synthesis of coumarin metabolites in and at the same time improved the salt tolerance of .
Supplementary Information: The online version contains supplementary material available at 10.1007/s11240-022-02427-w.
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