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Transcriptomic analyses of cacao cell suspensions in light and dark provide target genes for controlled flavonoid production

ABSTRACT: Transcriptomic analyses of cacao cell suspensions in light and dark provide target genes for controlled flavonoid production

PROVIDER: PRJNA471714 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR7172360.fastq.gz	Fastqsanger.gz
	SRR7172370.fastq.gz	Fastqsanger.gz
	SRR7172380.fastq.gz	Fastqsanger.gz
	SRR7172390.fastq.gz	Fastqsanger.gz
	SRR7172361.fastq.gz	Fastqsanger.gz

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Transcriptomic analyses of cacao cell suspensions in light and dark provide target genes for controlled flavonoid production

Project description:We performed RNA-Seq technology for quantification of differential expression of cacao cell suspensions under light/dark conditions. By obtaining over 15 millions of reads per sample, we cuantified the differential gene expression in structural, regulatory and light signaling genes associated with flavonoid biosynthesis. Our results indicated that light treatments can effectively regulate flavonoid profiles, shifting catechin - epicatechin ratios, in particular as a response to switching from white to blue light. The results demonstrated that HY5, MYB12, ANR and LAR were differentially regulated under light/dark conditions and could be targeted by overexpression aiming to improve catechin synthesis in cell cultures. Additionally, co-expression analyses of late flavonoid biosynthetic genes ANS, ANR and LAR showed a larger number of shared partners in the dark compared to selective partners in white-blue treatment. In conclusion, our RNA-Seq analysis of cacao cells cultured under different light conditions provides a platform to dissect key aspects into the genetic regulatory network of flavonoids. These light-responsive candidate genes can be used further to modulate the flavonoid production in in vitro systems with value-added characteristics.

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Transcriptomic analyses of cacao cell suspensions in light and dark provide target genes for controlled flavonoid production.

Project description:Catechins, including catechin (C) and epicatechin (E), are the main type of flavonoids in cacao seeds. They play important roles in plant defense and have been associated with human health benefits. Although flavonoid biosynthesis has been extensively studied using in vitro and in vivo models, the regulatory mechanisms controlling their accumulation under light/dark conditions remain poorly understood. To identify differences in flavonoid biosynthesis (particularly catechins) under different light treatments, we used cacao cell suspensions exposed to white-blue light and darkness during 14 days. RNA-Seq was applied to evaluate differential gene expression. Our results indicate that light can effectively regulate flavonoid profiles, inducing a faster accumulation of phenolic compounds and shifting E/C ratios, in particular as a response to switching from white to blue light. The results demonstrated that HY5, MYB12, ANR and LAR were differentially regulated under light/dark conditions and could be targeted by overexpression aiming to improve catechin synthesis in cell cultures. In conclusion, our RNA-Seq analysis of cacao cells cultured under different light conditions provides a platform to dissect key aspects into the genetic regulatory network of flavonoids. These light-responsive candidate genes can be used further to modulate the flavonoid production in in vitro systems with value-added characteristics.

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