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Genome wide identification of circRNAs, miRNAs and their targets in tomatoes at heat, drought and their combination

ABSTRACT: Genome wide identification of circRNAs, miRNAs and their targets in tomatoes at heat, drought and their combination

PROVIDER: PRJNA495618 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR7994050.fastq.gz	Fastqsanger.gz
	SRR7994060.fastq.gz	Fastqsanger.gz
	SRR7994070.fastq.gz	Fastqsanger.gz
	SRR7994080_1.fastq.gz	Fastqsanger.gz
	SRR7994080_2.fastq.gz	Fastqsanger.gz

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Genome wide identification of circRNAs, miRNAs and their targets in tomatoes at heat, drought and their combination

Project description:Purpose: Circular RNAs (circRNAs) and microRNAs (miRNAs) play important roles in abiotic stress responses in plants. The aims of this study are to genome-widely identify the circRNAs, miRNAs and their targets in tomatoes at single heat, drought and their combination by high-throughput sequencing. Results: Following high-throughput sequencing, 765 miRNAs were identified in total with 335 conserved and 430 novel miRNAs in the 12 small-RNA libraries. Of these miRNAs, 32, 74 and 61 miRNAs were responsive to drought, heat and their combination, respectively. Following degradome sequencing, 50 sequences were identified as targets of 34 miRNAs in tomatoes at combined stress. Moreover, 467 circRNAs were identified in the 12 samples.

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Project description:MicroRNAs (miRNAs) are part of gene regulatory networks that direct all most all biological processes in plants including their growth and development, as well as adaptation to biotic and abiotic stresses. Sorghum is largely grown for its grain production, but recently it also emerged a major feedstock for biofuel production. Interestingly, Sorghum is relatively drought tolerant crop and largely grown in semi-arid tropical and sub-tropical regions where the drought or high temperature or their combination co-occur in the field. Although miRNA profiles have been reported in Sorghum leaves exposed to drought, but thus far miRNAs in heat- or drought and heat-exposed conditions have not been reported. In this study, we report miRNA profiles in Sorghum leaves exposed to drought or heat or their combination. The bioinformatic analysis of small RNA libraries revealed the expression of approximately 30 conserved miRNA families represented by 81 individual miRNAs as well as 11 novel miRNA families in Sorghum leaves. Of these, 26 miRNAs were found to be differentially regulated in response to one or more of the stress treatments. Overall, the number of miRNAs regulated by heat was more than the drought. Furthermore, miRNA profiles revealed more similarities between heat and the combination of drought and heat stresses. We also have analyzed degradome profiles in control and drought-exposed plants to identify potential targets for the miRNAs. This study provides a frame work for better understanding of miRNA-guided gene regulations that vary between individual drought or heat or combination of drought and heat treatments.

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