Abstract
The root of Bupleurum marginatum var. stenophyllum (H. Wolff) Shan & Yin Li (Apiaceae), a new substitution for the popular Chinese medicinal material, Bupleuri Radix (Chai hu), is not easily distinguishable via traditional methods. The complete chloroplast genome sequence of B. marginatum var. stenophyllum was characterized using next-generation sequencing and the de novo assembly method. The complete genome was 155,576 bp in length and contained two inverted repeat (IR) regions of 26,311 bp, a large single-copy (LSC) region of 85,351 bp, and a small single-copy (SSC) region of 17,603 bp. It encoded 113 unique genes consisting of 79 protein-coding genes (PCGs), 30 transfer RNA genes, and four ribosomal RNA genes. Importantly, three genes (petB, petD and rps16) with small exon, and one trans-splicing gene (rps12) were correctly annotated. The overall GC content of the B. marginatum var. stenophyllum chloroplast genome is 37.7%. The phylogenetic analyses indicated that B. marginatum var. stenophyllum was closely related to B. marginatum. Moreover, many genetic information sites were available for distinguishing B. marginatum var. stenophyllum from the official ‘Chai hu’ plant sources, B. scorzonerifolium Willd. and B. chinense DC.
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