C.A. Meyer is a perennial herb that is used worldwide for a number of medical purposes. Long non-coding RNAs (lncRNAs) play a crucial role in diverse biological processes but still remain poorly understood in ginseng, which has limited the application of molecular breeding in this plant. In this study, we identified 17,478 lncRNAs and 3106 novel mRNAs from ginseng by high-throughput illumine sequencing. 50 and 257 differentially expressed genes (DEGs) and DE lncRNAs (DELs) were detected under drought + ABA vs. drought conditions, respectively. The DEGs and DELs target genes main enrichment is focused on the "biosynthesis of secondary metabolites", "starch and sucrose metabolism", and "carbon metabolism" pathways under drought + ABA vs. drought conditions according to KEGG pathway enrichment analysis, suggesting that these secondary metabolites biosynthesis pathways might be crucial for ABA-mediated drought stress response in ginseng. Together, we identified drought stress response lncRNAs in ginseng for the first time and found that the target genes of these lncRNAs mainly regulate the biosynthesis of secondary metabolites pathway to response to drought stress. These findings also open up a new visual for molecular breeding in ginseng.
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