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Tuber transcriptome profiling of eight potato cultivars with different cold-induced sweetening responses to cold storage

ABSTRACT: Tuber transcriptome profiling of eight potato cultivars with different cold-induced sweetening responses to cold storage

PROVIDER: PRJNA575227 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR10210733_1.fastq.gz	Fastqsanger.gz
	SRR10210733_2.fastq.gz	Fastqsanger.gz
	SRR10210734_1.fastq.gz	Fastqsanger.gz
	SRR10210734_2.fastq.gz	Fastqsanger.gz
	SRR10210735_1.fastq.gz	Fastqsanger.gz

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Tuber transcriptome profiling of eight potato cultivars with different cold-induced sweetening responses to cold storage

Project description:Tubers are vegetative reproduction organs formed from underground extensions of the plant stem. Potato tubers are harvested and stored for months. Storage under cold temperatures of 2 - 4 °C is advantageous for supressing sprouting and diseases. However, development of reducing sugars can occur with cold storage through a process called cold-induced sweetening (CIS). CIS is undesirable as it leads to darkened color with fry processing. The purpose of the current study was to find differences in biological responses in eight cultivars with variation in CIS resistance. Transcriptome sequencing was done on tubers before and after cold storage and three approaches were taken for gene expression analysis: 1. Gene expression correlated with end-point glucose after cold storage, 2. Gene expression correlated with increased glucose after cold storage (after-before), and 3. Differential gene expression before and after cold storage. Cultivars with high CIS resistance (low glucose after cold) were found to increase expression of an invertase inhibitor gene and genes involved in DNA replication and repair after cold storage. The cultivars with low CIS resistance (high glucose after cold) showed increased expression of genes involved in abiotic stress response, gene expression, protein turnover and the mitochondria. There was a small number of genes with similar expression patterns for all cultivars including genes involved in cell wall strengthening and phospholipases. It is proposed that the pattern of gene expression is related to chilling-induced DNA damage repair and cold acclimation and that genetic variation in these processes are related to CIS.

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Tuber-omics in potato with the T and D types of cytoplasm showed differentially expressed genes and proteins in response to cold storage

Project description:For the first time, we report differentially expressed genes (DEGs) and differentially expressed proteins (DEPs) in potato (Solanum tuberosum L.) tubers characterized by light and dark chip color after cold storage. Two potato diploid progenies derived from reciprocal crosses of parental clones possessing the T- and D-type cytoplasm were used. We recognized 48 and 15 DEGs as compared to RNA-seq data of contrasting segregants. We identified DEPs in potato tuber amyloplast and mitochondrial fractions. Seven and five DEPs were identified in the amyloplast fractions of the T – and D – type cytoplasm, respectively. Higher number of DEPs were selected from the mitochondrial fraction. The corresponding values were 97 and 105, including 39 common DEPs in the T – and D – type cytoplasm. These findings suggest that mitochondria may play a more important role than amyloplasts in response of potato tubers to cold treatment and that this influence can be different for the T – and D – type cytoplasm. However, we showed that the mt/nucDNA and pt/nucDNA ratios tend to increase for tubers characterized by dark chip color when compared with light chip color samples. Therefore, a protective effect of reducing sugars on both amyloplasts and mitochondria during low temperature treatment should be considered.

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