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Annotation of Plant Gene Function via Combined Genomics, Metabolomics and Informatics
Published on: June 17, 2012
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Comparative transcriptomic and metabolomic analyses reveal differences in flavonoid biosynthesis between PCNA and PCA
Yiru Wang1, Yujing Suo1, Weijuan Han1
1Research Institute of Non-Timber Forestry, Chinese Academy of Forestry, Zhengzhou, China.
Frontiers in Plant Science
|March 16, 2023
Summary
Persimmon astringency is linked to flavonoid biosynthesis. PCA persimmons have higher flavonoids, driven by specific genes and transcription factors, impacting flavor. This research clarifies flavonoid pathways in persimmons.
Area of Science:
- Plant Biochemistry
- Molecular Biology
- Agricultural Science
Background:
- Persimmon (Diospyros kaki) fruit is economically and nutritionally valuable, rich in flavonoids.
- Flavonoids, essential plant secondary metabolites, are linked to persimmon astringency, particularly proanthocyanidins.
- Limited information exists on relationships between astringency types, other flavonoid subclasses, and their biosynthetic genes.
Purpose of the Study:
- To investigate variations in flavonoid biosynthesis genes and metabolites between pollination-constant non-astringent (PCNA) and pollination-constant astringent (PCA) persimmons.
- To identify key genes and regulatory factors involved in flavonoid biosynthesis pathways influencing persimmon astringency.
- To provide foundational knowledge for understanding how astringency affects flavor components in different persimmon varieties.
Main Methods:
- Correlation analysis between total flavonoids and fruit astringency type.
- KEGG pathway analysis of metabolites to identify linked pathways.
- Gene expression and metabolite variation analysis during fruit development in typical PCNA ('Jiro') and PCA ('Huojing') persimmons.
- Weighted Gene Co-expression Network Analysis (WGCNA) combined with KEGG analysis.
Main Results:
- Flavonoid concentration was significantly higher in PCA ('Huojing') than PCNA ('Jiro') persimmons, with notable differences in proanthocyanin precursors (epicatechin) and anthocyanins (cyanidin derivatives).
- Key genes (e.g., PAL, C4H, CHI, CHS, F3H, F3'5'H, FLS, DFR, ANR, ANS, UF3GT) in phenylpropanoid and flavonoid biosynthesis pathways were identified as significant factors.
- Interactions between R2R3MYB and WD40 transcription factors were associated with structural genes, suggesting a regulatory role in flavonoid biosynthesis.
Conclusions:
- Flavonoid biosynthesis pathways and their regulation are crucial in determining persimmon astringency types.
- Specific genes and transcription factor interactions significantly influence proanthocyanidin and anthocyanin content, impacting fruit flavor.
- This study enhances understanding of persimmon flavonoid metabolism and provides a basis for future research on fruit quality traits.
