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ABSTRACT: Transcriptome sequencing of leaf color transition in tea

PROVIDER: PRJNA644340 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR12153421_1.fastq.gz	Fastqsanger.gz
	SRR12153421_2.fastq.gz	Fastqsanger.gz
	SRR12153422_1.fastq.gz	Fastqsanger.gz
	SRR12153422_2.fastq.gz	Fastqsanger.gz
	SRR12153423_1.fastq.gz	Fastqsanger.gz

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Shading Effects on Leaf Color Conversion and Biosynthesis of Three Major Secondary Metabolites in the Albino Tea Cultivar ‘Yujinxiang’

Project description:An increasing amount of evidence attest that the tea made by albino tea cultivars processes characteristic aroma and taste, which has been considered as a new potential product in the market. Therefore, flavor formation mechanism of albino tea cultivars have drawn exceeding attention from researchers. In this study, transcriptome, metabolomics, and whole-genome bisulfite sequencing (WGBS) were employed to investigate shading effects on leaf color conversion and biosynthesis of three major secondary metabolites in the Albino tea cultivar ‘Yujinxiang’. The increase of leaf chlorophyll level is the major cause of shaded leaf greening from young pale or yellow leaf. Transcriptome analysis showed differentially expressed genes (DEGs) mainly participated in biosynthesis of amino acids, phenylalanine metabolism, phenylalanine, tyrosine and tryptophan biosynthesis, sulfur metabolism, purine metabolism, and pentose and glucuronate interconversions in shading period compared with control group. The result of metabolomics indicated the total catechins level of shading group was significantly decreased than the control; however, the abundance of caffeine was markedly increased, and theanine level was nearly not influenced. Whole-genome DNA methylation analysis revealed that the global genomic DNA methylation patterns of shading period were remarkably altered compared with the control. Furthermore, differentially methylated regions (DMRs) and the DMR-related DEGs between shading and non-shading analysis indicated the DMR-related DEGs were the critical participants in biosynthesis of three major secondary metabolites. To sum up, these findings suggested that the altered levels of DNA methylation may be the main cause for biosynthesis changes of three major secondary metabolites in ‘Yujinxiang’.

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