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• W4313279008 abstract "Abstract The yellow colour of ornamental varieties of tree peony originated from Paeonia delavayi . However, but P. delavayi and Paeonia suffruticosa belong to different subgroups, so hybridization is difficult and results in a long breeding cycle. However, no comprehensive transcriptomic profiling has focused on the colour formation mechanisms of yellow tree peony petals. Analysing the colour formation mechanism of yellow petals in P. delavayi is very important for directional molecular breeding. In this study, the transcriptional map of yellow pigment development in petals was used to analyse the mechanism of petal colour formation. We analysed the genes related to the metabolism of flavonoids and carotenoids and the transcription factors (TFs) involved in P. delavayi var. lutea (pure yellow individual) yellow pigment development using transcriptome sequence profiling. Transcriptome sequence profiles revealed three and four differentially expressed transcripts (DETs) involved in flavonoid biosynthesis and carotenoid biosynthesis, respectively. An analysis of DETs in the flavonoid pathway showed that chalcone synthase ( CHS ) and chalcone 2´-glucosyltransferases (THC 2’GT ) act in synergy to synthesize isosalipurposide (ISP). CHS and flavonol synthase ( FLS ) synergistically synthesize quercetin and kaempferol. DEG analysis of the carotenoid pathway revealed that phytoene synthase ( PSY ), carotenoid isomerase ( CRTISO ) and β-carotene hydroxylases ( CHYB ) play a key role in regulating lutein formation, and carotenoid cleavage dioxygenase ( CCD ) plays an important role in the degradation of carotenoids. These two pathways may be regulated by TF families such as bHLH , ARF , and MYB . The results of the transient overexpression of genes showed that CHS and CHI are regulated by PdMYB2 . In this study, the molecular mechanism of ISP synthesis was analysed in depth, and the complete metabolic pathway of carotenoids in Paeonia L. was reported for the first time. By studying the formation mechanism of yellow pigment in P. delavayi petals, a breeding strategy for improving flavonol and carotenoid contents and reducing anthocyanin synthesis by genetic engineering was suggested." @default.
• W4313279008 created "2023-01-06" @default.
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• W4313279008 date "2022-12-29" @default.
• W4313279008 modified "2023-10-17" @default.
• W4313279008 title "Transcriptome profiling reveals the roles of pigment formation mechanisms in yellow Paeonia delavayi flowers" @default.
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• W4313279008 doi "https://doi.org/10.1007/s00438-022-01973-4" @default.
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• W4313279008 hasPublicationYear "2022" @default.
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