Abstract
Akebia quinata is a dry vine stem of Akebia quinata (Thunb.) Decne. in the Lardizabalaceae Akebia Decne, which has antibacterial, anti-tumor, and diuretic properties. Calceolarioside B is a known effective component of Akebia quinata. Moreover, calceolarioside B is a phenylpropanoid, the current understanding of the molecular mechanisms of phenylpropanoid biosynthetic pathway is not clear. In this study, we performed RNA-Seq analysis of the flowers, leaves, roots, and stems of Akebia quinata using the BGISEQ-500 platform. The assembly of transcripts from all four types of tissues generated 123,576 unigenes, of which 90,273 were mapped to several public databases for functional annotation. We identified 182 genes encoding 13 key enzymes involved in phenylpropanoid biosynthesis through their KEGG annotation. DEGs were identified via the comparison of gene expression levels between stems and other tissues (flowers, leaves, and roots). We also verified the expression levels of some unigenes encoding key enzymes using qRT-PCR. This analysis of the phenylpropanoid biosynthesis pathway and its crucial enzymes in Akebia quinata lays a foundation for uncovering the regulatory mechanism of phenylpropanoid biosynthesis. The expression patterns of genes involved in the phenylpropanoid biosynthesis pathway were verified using qRT-PCR. We suggest that transcripts of 4CL may be key regulators in the phenylpropanoid biosynthetic pathway. Our results greatly extend the public transcriptome data set of Akebia quinata and provide valuable information for the identification of candidate genes involved in phenylpropanoid biosynthesis.
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Data availability
In this study, the RNA-Seq raw data reads have been deposited in NCBI Sequence Read Archive (SRA) database. Reviewer link: https://dataview.ncbi.nlm.nih.gov/object/PRJNA860796?reviewer=2gocus2ljundflnokhdusp9s6u.
Abbreviations
- RNA-Seq:
-
RNA sequencing
- KEGG:
-
Kyoto Encyclopedia of Genes and Genomes
- DEGs:
-
Differentially expressed genes
- qRT-PCR:
-
Quantitative real-time polymerase chain reaction
- NR:
-
NCBI non-redundant protein sequence
- NT:
-
NCBI nucleotide sequence
- KOG:
-
Clusters of euKaryotic Orthologous Groups
- PFAM:
-
Protein families database
- GO:
-
Gene ontology
- PAL:
-
Phenylalanine ammonia-lyase
- C4H:
-
Cinnamate 4-hydroxylase
- 4CL:
-
4-Coumarate–CoA ligase
- HCT:
-
Shikimate O-hydroxycinnamoyltransferase
- C3′H:
-
5-O-(4-coumaroyl)-D-quinate 3′-monooxygenase
- CCoAOMT:
-
Caffeoyl-CoA O-methyltransferase
- CCR:
-
Cinnamoyl-CoA reductase
- F5H:
-
Ferulate-5-hydroxylase
- COMT:
-
Caffeic acid 3-O-methyltransferase
- CAD:
-
Cinnamyl-alcohol dehydrogenase
- CHS:
-
Chalcone synthase
- CHI:
-
Chalcone isomerase
- F3H:
-
Naringenin 3-dioxygenase
- ORF:
-
Open reading frame
- TFs:
-
Transcription factors
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Acknowledgements
This research was supported by the Research Project on pharmacodynamic material basis of Anhui genuine main medicinal materials (RZ2100000757), the Natural Science Foundation of Education Department of Anhui Province, China (KJ2019A0479), the Demonstration Funds for the Promotion of Forestry Science and Technology from the Central Finance (Z175070050002), and the Talent Project of Anhui University of Chinese Medicine (2021RCYB011).
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Qian, C., Yang, Y., Wu, R. et al. Transcriptome analysis of Akebia quinata (Thunb.) Decne. and discovery of key enzyme genes in the phenylpropanoid biosynthesis pathway. Acta Physiol Plant 45, 117 (2023). https://doi.org/10.1007/s11738-023-03603-x
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DOI: https://doi.org/10.1007/s11738-023-03603-x