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ABSTRACT: Transcriptome analysis of the herbal plant Cnidium officinale grown under heat stress conditions using a temperature gradient tunnel

PROVIDER: PRJNA1122954 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR29367541_1.fastq.gz	Fastqsanger.gz
	SRR29367541_2.fastq.gz	Fastqsanger.gz
	SRR29367542_1.fastq.gz	Fastqsanger.gz
	SRR29367542_2.fastq.gz	Fastqsanger.gz
	SRR29367543_1.fastq.gz	Fastqsanger.gz

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Project description:The post-translational protein modiﬁcation known as SUMOylation has conserved roles in the heat stress responses of various species. The functional connection between the global regulation of gene expression and chromatin-associated SUMOylation in plant cells isunknown. Here, we uncovereda genome-wide relationship between chromatin-associated SUMOylation and transcriptional switches in Arabidopsis thaliana grown at room temperature, exposed to heat stress, and exposed to heat stress followed by recovery. The small ubiquitin-like modiﬁer (SUMO)-associated chromatin sites, characterized by whole-genome ChIP-seq, were generally associated with active chromatin markers. In response to heat stress, chromatin-associated SUMO signals increased at promoter-transcriptional start site regions and decreased in gene bodies. RNAseqanalysissupportedthe role ofchromatin-associatedSUMOylationin transcriptionalactivation duringrapid responses to high temperature. Changes inSUMO signals on chromatinwere associated with the upregulation ofheat-responsivegenesandthedownregulationofgrowth-relatedgenes.DisruptionoftheSUMOligasegene SIZ1 abolished SUMO signals on chromatin and attenuated rapid transcriptional responses to heat stress. The SUMO signal peaks were enriched in DNA elements recognized by distinct groups of transcription factors under different temperature conditions. These observations provide evidence that chromatin-associated SUMOylation regulates the transcriptional switch between development and heat stress response in plant cells.

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Alterations in the transcriptome and translatome profiles of Arabidopsis pollen germinated under heat stress

Project description:Plant reproduction is one key biological process very sensitive to heat stress and, as a consequence, enhanced global warming imposes serious threats to sustain food safety worldwide. In this work we have focused on the molecular impact that high temperature conditions impose on gene expression of Arabidopsis pollen germinated in vitro. We have used a high-resolution ribosome profiling technology to provide, for the first time, a comprehensive study of how both the transcriptome and the translatome of germinated pollen respond to the increase in temperature. Although heat shock responses operate properly under high temperature conditions, we have uncovered important alterations under elevated temperature regimes down-regulating essential processes linked to cation/proton exchange and to carbohydrate/cation symport transport. These alterations provide molecular explanations to the dramatic alterations of pollen tube growth under heat stress. Overall a high correlation between transcriptional and translational responses to high temperature was found, but specific regulations at the translational level are also present in pollen subjected to temperature challenging conditions.

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