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ABSTRACT: Transcriptome C of cotton under high temperature stress

PROVIDER: PRJNA706603 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR13857252_1.fastq.gz	Fastqsanger.gz
	SRR13857253_1.fastq.gz	Fastqsanger.gz
	SRR13857254_1.fastq.gz	Fastqsanger.gz
	SRR13857255_1.fastq.gz	Fastqsanger.gz
	SRR13857256_1.fastq.gz	Fastqsanger.gz

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Project description:Purpose: Identification and characterization of thermotolerance candidate genes during early seedling stage by comparative transcriptome analysis. We performed transcriptome sequencing (mRNA-seq) of cotton leaves under high temprature stress using Illumina sequencing technology. And quantitative reverse transcription polymerase chain reaction (qRTâPCR) methods and to evaluate protocols for optimal high-throughput data analysis Methods: A comparative transcriptomics approach was used to monitor gene differential expression at two time points (4 and 8 h) in leaves of the two cotton genotypes under high temprature conditions. Results: During a 8-h salt exposure,among 9,777 differentially expressed unigenes (DEUs) were identified during at least one time point, 7,296 DEUs representing different classes of protein kinases, transcription factors, and heat shock proteins as well as downstream thermotolerance-related genes are reported. Gene ontology enrichment and biochemical pathway analyses showed these DEUs were mainly related to carbohydrate metabolism, secondary metabolites, and plant hormone signalling. Conclusions: Our findings offer high efficiency technique for early charactering thermotolerance in cotton and provide the information for the candidate genes to improve thermotolerance of cotton cultivars. Leaf mRNA profiles of 20-day-old seedlings of two cotton genotypes, one heat tolerant and the other heat sensitive during a 8-h high-temperature exposure were generated by deep sequencing, using Illumina HiSeq 2000 system.

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Project description:Purpose:Identification of genes and miRNAs responsible for salt tolerance in upland cotton (Gossypium hirsutum L.) would help reveal the molecular mechanisms of salt tolerance. We performed physiological experiments and transcriptome sequencing (mRNA-seq and small RNA-seq) of cotton leaves under salt stress using Illumina sequencing technology. And quantitative reverse transcription polymerase chain reaction (qRT–PCR) methods and to evaluate protocols for optimal high-throughput data analysis Methods:We investigated two distinct salt stress phases—dehydration (4 h) and ionic stress (osmotic restoration; 24 h)—that were identified by physiological changes of 14-day-old seedlings of two cotton genotypes, one salt tolerant and the other salt sensitive, during a 72-h NaCl exposure. A comparative transcriptomics approach was used to monitor gene and miRNA differential expression at two time points (4 and 24 h) in leaves of the two cotton genotypes under salinity conditions. Results:During a 24-h salt exposure, 819 transcription factor unigenes were differentially expressed in both genotypes, with 129 unigenes specifically expressed in the salt-tolerant genotype. Under salt stress, 108 conserved miRNAs from known families were differentially expressed at two time points in the salt-tolerant genotype. Conclusions:Our comprehensive transcriptome analysis has provided new insights into salt-stress response of upland cotton. The results should contribute to the development of genetically modified cotton with salt tolerance.

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