title: Transcriptomic analyses reveal biosynthetic genes related to rosmarinic acid in Dracocephalum tanguticum.
abstract: Dracocephalum tanguticum Maxim, a Lamiaceae species endemic to the Qinghai-Tibetan Plateau and adjacent regions, is an important ornamental, medicinal and aromatic herb. In this study, a comprehensive transcriptome of 18 libraries from six organs namely, roots, stems, leaves, sepals, flowers and seeds of D. tanguticum were generated. More than 100 Gb of sequence data were obtained and assembled de novo into 187,447 transcripts, including 151,463 unigenes, among which the six organs shared 17.7% (26,841). In addition, all unigenes were assigned to 362 pathways, in which 'biosynthesis of secondary metabolites' is the second enriched pathway. Furthermore, rosmarinic acid (RA) is one of the multifunctional phenolic bioactive compounds produced in some Lamiaceae species. The six organs of D. tanguticum were confirmed to produce RA. A total of 22 predicted biosynthetic genes related to RA from the transcriptome were further isolated. Two of these genes were identified as candidates by evaluating the correlation coefficient between the RA contents and the expression of the predicted biosynthetic genes in the six organs. The new sequence information will improve the knowledge of D. tanguticum, as well as provide a reference tool for future studies of biosynthetic genes related to RA in this species.
authors.affiliation: Medicinal Plants Research Centre, Tibet Agricultural and Animal Husbandry College, Nyingchi, 860000, China.|College of Agriculture, Guizhou University, Guiyang, 550025, China.
authors.forename: Huie
authors.initials: H
authors.lastname: Li
authors.affiliation: Medicinal Plants Research Centre, Tibet Agricultural and Animal Husbandry College, Nyingchi, 860000, China.
authors.forename: Yaru
authors.initials: Y
authors.lastname: Fu
authors.affiliation: Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, 110016, China.
authors.forename: Hao
authors.initials: H
authors.lastname: Sun
authors.affiliation: Medicinal Plants Research Centre, Tibet Agricultural and Animal Husbandry College, Nyingchi, 860000, China.
authors.forename: Yanfu
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: Medicinal Plants Research Centre, Tibet Agricultural and Animal Husbandry College, Nyingchi, 860000, China. lanxiaozhong@163.com.|TAAHC-SWU Medicinal Plants Joint Research and Development Centre, Tibet Agricultural and Animal Husbandry College, Nyingchi, 860000, China. lanxiaozhong@163.com.
authors.forename: Xiaozhong
authors.initials: X
authors.lastname: Lan
mesh_terms: D053898:Biosynthetic Pathways; D002934:Cinnamates / Q000378:metabolism*; D053630:Depsides / Q000378:metabolism*; D035264:Flowers / Q000235:genetics; D020869:Gene Expression Profiling / Q000379:methods*; D018506:Gene Expression Regulation, Plant; D019686:Lamiaceae / Q000235:genetics* / Q000254:growth & development; D009928:Organ Specificity; D018515:Plant Leaves / Q000235:genetics; D010940:Plant Proteins / Q000235:genetics; D018517:Plant Roots / Q000235:genetics; D018547:Plant Stems / Q000235:genetics; D017423:Sequence Analysis, RNA / Q000379:methods*; D000097123:Rosmarinic Acid
chemical_list: D002934:Cinnamates; D053630:Depsides; D010940:Plant Proteins; D000097123:Rosmarinic Acid