PJB-2019-878
EARLY BOLTING OF ANGELICA SINENSIS: EVIDENCE FROM METABOLITES
Lucun Yang
Abstract
Angelica sinensis, commonly known as female ginseng, is a highly valued medicinal herb that is widely cultivated in China. Although A. sinensis is in great demand due to its multiple medicinal and dietary applications, its early bolting rate (almost 40%) severely affects the crop quality. Several studies have investigated the morphological structure, endogenous hormones, physiological activity, physiological characteristics, biochemical characteristics, and gene expression of early bolting A. sinensis, but few studies have focused on the metabolites involved in the early bolting process. Here, we compared the metabolomes of early bolting and normal A. sinensis using a widely targeted metabolomics approach. In total, 456 metabolites were identified, 90 of which showed differential expression (34 upregulated and 56 downregulated in early bolting A. sinensis compared with normal A. sinensis). A metabolic pathway analysis of these differential metabolites revealed a significant enrichment of the “pyrimidine metabolism”, “purine metabolism” and “histidine metabolism” pathways in early bolting A. sinensis. A hierarchical cluster analysis of the differential metabolites revealed a clear grouping pattern in which the relative contents of five hydroxycinnamoyl derivatives, two coumarins, one amino acids, one amino acid derivatives, and three nucleotide derivatives differed significantly between the early bolting A. sinensis and normal A. sinensis groups. Therefore, compared with normal A. sinensis, early bolting A. sinensis mainly participate in the biosynthesis of fundamental plant life activities substance and lignin, leading to the increase of lignin. Our findings provide a novel insight into early bolting A. sinensis that it mainly carries out metabolism of essential substances for life activities and lignin.
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