Abstract
Atractylodes lancea: (Thunb.) DC. is an endangered traditional Chinese medicinal herb with broad pharmacological activity, reflected by an abundance of sesquiterpenoids. However, the biosynthesis of these sesquiterpenoids is largely unknown due to a lack of genetic information. To understand sesquiterpenoid distribution in A. lancea, tissue-specific sesquiterpenoids accumulation patterns during different growth periods of plantlets were analyzed via gas chromatography (n = 3). Transcriptomic analyses were furthermore performed via RNA-Seq in an attempt to reveal the molecular mechanism regulating sesquiterpenoids formation in leaves, stems and roots. 85,170 unigenes with an average sequence length of 768 bp were acquired. Via analysis of differentially expressed genes, 857 unigenes were identified to be involved in sesquiterpenoids formation. Consequently, a putative sesquiterpenoid biosynthetic pathway was proposed, including mevalonate, 2-C-methyl-d-erythritol-4-phosphate, sesquiterpene synthase, cytochrome P450, and the peroxisome pathway. Moreover, the relationship between gene expression and sesquiterpenoid production in different growth periods of leaves, stems, and roots was analyzed based on Quantitative Real-Time PCR (n = 3) and gas chromatography data. In this study, the sesquiterpenoid distribution in different tissues of sterile tissue culture plantlets of A. lancea was systematically investigated via metabolite quantitative and transcriptomics analysis. This study provides a central theoretical basis for the manipulation of sesquiterpenoid biosynthesis in A. lancea.
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Abbreviations
- A. lancea :
-
Atractylodes lancea (Thunb.) DC.
- GC:
-
Gas chromatography
- MS:
-
Mass spectrometry
- L. canum:
-
Leucosceptrum canum
- MS:
-
Murashige and Skoog
- NR:
-
Non-redundant
- NT:
-
Nucleotide
- COG:
-
Classification of Orthologous Group
- KEGG:
-
Kyoto encyclopedia of genes and genomes
- GO:
-
Gene ontology
- FPKM:
-
Fragments per kilobase of transcript per million fragments mapped
- DEGs:
-
Differentially expressed genes
- FDR:
-
False discovery rate
- A. annua :
-
Artemisia annua
- qRT-PCR:
-
Quantitative Real-Time PCR
- MVA:
-
Mevalonate
- MEP:
-
2-C-methyl-d-erythritol-4-phosphate
- IPP:
-
Isopentenyl diphosphate
- DMAPP:
-
Dimethylallyl diphosphate
- HMGCR:
-
3-Hydroxy-3-methylglutaryl CoA synthase
- DXR:
-
1-Deoxy-d-xylulose-5-phosphate reductoisomerase
- IDI:
-
Isopentenyl diphosphate isomerase
- FDPS:
-
Farnesyl diphosphate synthase
- FS:
-
Farnesene synthase
- GAS:
-
Germacrene A synthase
- GDS:
-
Germacrene D synthase
- CPS:
-
β-Caryophyllene synthase
- ROS:
-
Reactive oxygen species
- CAT:
-
Catalase
- SOD:
-
Superoxide dismutase
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Acknowledgements
This work was financially supported by National Natural Science Foundation of China (21406119 and 31070443), Natural Science Foundation of the Higher Education Institutions of Jiangsu Province (14KJB180009), Integration of Production and Research Projects of Nanjing Science and Technology Commission (201306019), and a project funded by the Priority Academic Program Development (PAPD) of Jiangsu Higher Education Institutions.
Author contributions
Chuan-Chao Dai and Fei Chen conceived and designed the experiments. Fei Chen, Yu-Xiao Wei, Jing-Min Zhang, Xiu-Mei Sang performed the experiments. Fei Chen analyzed the data and wrote the manuscript.
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Chen, F., Wei, YX., Zhang, JM. et al. Transcriptomics analysis investigates sesquiterpenoids accumulation pattern in different tissues of Atractylodes lancea (Thunb.) DC. plantlet. Plant Cell Tiss Organ Cult 130, 73–90 (2017). https://doi.org/10.1007/s11240-017-1205-8
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DOI: https://doi.org/10.1007/s11240-017-1205-8