Abstract
Pogostemon cablin, the natural source of patchouli alcohol, is an important herb in the Lamiaceae family. Here, we present the entire chloroplast genome of P. cablin. This genome, with 38.24% GC content, is 152,460 bp in length. The genome presents a typical quadripartite structure with two inverted repeats (each 25,417 bp in length), separated by one small and one large single-copy region (17,652 and 83,974 bp in length, respectively). The chloroplast genome encodes 127 genes, of which 107 genes are single-copy, including 79 protein-coding genes, four rRNA genes, and 24 tRNA genes. The genome structure, GC content, and codon usage of this chloroplast genome are similar to those of other species in the family, except that it encodes less protein-coding genes and tRNA genes. Phylogenetic analysis reveals that P. cablin diverged from the Scutellarioideae clade about 29.45 million years ago (Mya). Furthermore, most of the simple sequence repeats (SSRs) are short polyadenine or polythymine repeats that contribute to high AT content in the chloroplast genome. Complete sequences and annotation of P. cablin chloroplast genome will facilitate phylogenic, population and genetic engineering research investigations involving this particular species.
Highlights
Lamiaceae, the mint family of flowering plants, is the largest family of the Lamiales order which is composed of more than 7000 species [1]
Gap closing procedures was performed by PCR amplification of the gap regions and followed by Sanger sequencing (Supplementary Figure S1; designed primers are shown in Supplementary Table S2)
We obtained the complete chloroplast genome of P. cablin, which is comprised of 152,460 bp, that falls within the range of the typical size of an angiosperm chloroplast genome [14]
Summary
The mint family of flowering plants, is the largest family of the Lamiales order which is composed of more than 7000 species [1] Plants from this family are valued for its flavor, fragrance, and medicinal properties. The abundant patchouli alcohol in its leaves is an important ingredient for perfumes, incense, soaps, and cosmetic products [8,9]. It exerts a wide range of medicinal effects, including inhibition of platelet aggregation, anti-inflammatory activity, as well as antidepressant, aphrodisiac, febrifuge, astringent, carminative, diuretic, sedative, and tonic properties [10,11]. Patchouli is an essential Chinese medicinal plant [12] that can be used to eliminate heat and dampness, relieve fatigue, and cure indigestion, headache, and fever which are documented in Chinese Pharmacopoeia [13]
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