Heat shock response and transposon control in plant shoot stem cells
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA929030 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR23261100.fastq.gz | Fastqsanger.gz | |||
| SRR23261200.fastq.gz | Fastqsanger.gz | |||
| SRR23261101.fastq.gz | Fastqsanger.gz | |||
| SRR23261201.fastq.gz | Fastqsanger.gz | |||
| SRR23261102.fastq.gz | Fastqsanger.gz |
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Project description:Post-embryonic plant development must be coordinated in response to and with environmental feedback. Development of above-ground organs is orchestrated from stem cells in the center of the shoot apical meristem (SAM). Heat can pose significant abiotic stress to plants and induce a rapid heat shock response, developmental alterations, chromatin decondensation, and activation of transposable elements (TEs). However, most plant heat-stress studies are conducted with seedlings, and we know very little about cell-type-specific responses. Here we use fluorescent-activated nuclear sorting to isolate and characterize stem cells of wild type and mutants defective in TE defense and chromatin compaction after heat shock and after a long recovery. Our results indicate that stem cells can suppress heat shock response pathways to maintain developmental programs. Furthermore, mutants defective in DNA methylation fail to recover efficiently from heat stress and persistently activate heat shock factors and heat-inducible TEs. Heat stress also induces DNA methylation epimutations, especially in the CHG context, and we find hundreds of DNA methylation changes three weeks after stress. Our results underline the importance of disentangling cell type-specific environmental responses for understanding plant development.
2023-09-30 | GSE223914 | GEO
Project description:Post-embryonic plant development must be coordinated in response to and with environmental feedback. Development of above-ground organs is orchestrated from stem cells in the center of the shoot apical meristem (SAM). Heat can pose significant abiotic stress to plants and induce a rapid heat shock response, developmental alterations, chromatin decondensation, and activation of transposable elements (TEs). However, most plant heat-stress studies are conducted with seedlings, and we know very little about cell-type-specific responses. Here we use fluorescent-activated nuclear sorting to isolate and characterize stem cells of wild type and mutants defective in TE defense and chromatin compaction after heat shock and after a long recovery. Our results indicate that stem cells can suppress heat shock response pathways to maintain developmental programs. Furthermore, mutants defective in DNA methylation fail to recover efficiently from heat stress and persistently activate heat shock factors and heat-inducible TEs. Heat stress also induces DNA methylation epimutations, especially in the CHG context, and we find hundreds of DNA methylation changes three weeks after stress. Our results underline the importance of disentangling cell type-specific environmental responses for understanding plant development.
2023-09-30 | GSE223850 | GEO
Project description:Heat shock response and transposon control in plant shoot stem cells [Bisulfite-seq]
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Project description:Heat shock response and transposon control in plant shoot stem cells [RNA-seq]
| PRJNA929034 | ENA
Project description:This SuperSeries is composed of the SubSeries listed below.
2023-09-30 | GSE223915 | GEO
Project description:Ambient temperature is one of the most important environment factors that direct all organisms for morphogenesis, metabolisms and growth. Plants have evolved efficient mechanisms adapting temperature fluctuation such as heat stress response (HSR). Although transcriptional regulatory network of plant HSR has been established, little is known on the genome-wide transcriptional changes within first several minutes upon heat shock (HS). To precisely measure the very first wave of transcriptional response to HS, we investigated the nascent RNA and mature mRNA from plant leaf tissue exposure to 5-min HS treatment using global run-on sequencing (GRO-seq) and RNA sequencing (RNA-seq) methods. We found that only a small group of genes were both up- or down-regulated at nascent RNA and mRNA levels. Primed plants that already exposed to a mild heat stress induced a more drastic transcriptomic alteration than naïve plants which had not experienced a heat stress. Group A1 HEAT SHOCK TRANSCRIPTION FACTORs (HsfA1s) are the major transcription factors in charge of the very early transcriptional HSR. Within 5-minute HS, we also observed that: 1) Engaged RNA polymerase II (Pol II) was accumulated downstream of transcription start sites; 2) 5' pause-release is a rate limiting step for induction of some heat shock protein genes; 3) A good number of genes switched transcription modes; 4) Pervasive read-through was induced at terminators. Plants' HSR is transcriptionally very quick. GRO-seq is sensitive and robust to detect quick response to HS. Heat stress memory takes place at multiple steps of transcription cycles such as Pol II recruitment, 5' pausing, elongation and termination.
2020-07-11 | GSE128698 | GEO
Project description:Whole-genome analysis of heat shock factor binding sites in Drosophila melanogaster. Heat shock factor IP DNA or Mock IP DNA from heat shocked Kc 167 cells compared to whole cell extract on Agilent 2x244k tiling arrays.
2011-01-05 | GSE19744 | GEO
Project description:Heat shock response (HSR) is a cellular defense mechanism against various stresses. Both heat shock and proteasome inhibitor MG132 cause the induction of heat shock proteins, a distinct feature of HSR. To better understand the molecular basis of HSR, we subjected the mouse fibrosarcoma cell line, RIF-1, and its thermotolerant variant, TR-RIF-1 cells, to heat shock and MG132. We compared mRNA expressions using microarray analysis during recovery after heat shock and MG132 treatment. This study led us to group the 3,245 up-regulated genes by heat shock and MG132 into three families: genes regulated 1) by both heat shock and MG132 (e.g. chaperones); 2) by heat shock (e.g. DNA-binding proteins including histones); and 3) by MG132 (e.g. innate immunity and defense-related molecules).
2011-11-09 | GSE24197 | GEO
Project description:Dnmt2 genes are highly conserved tRNA methyltransferases with biological roles in cellular stress responses. Dnmt2 has recently been implicated in transposon silencing in Drosophila but the exact molecular mechanisms are unclear. Adult Dnmt2 mutants were heat shocked and RNA sequencing was performed on visible high-molecular weight RNAs to determine the identity of up-regulated transposons. Dnmt2 mutants accumulated almost all families of transposons after heat shock, indicating a general mis-regulation of transposon silencing in Dnmt2 mutants during the stress response.
2014-12-01 | GSE40432 | GEO
Project description:Recombinant Escherichia coli cultures are used to manufacture numerous therapeutic proteins and industrial enzymes, where many of these processes use elevated temperatures to induce recombinant protein production. The heat-shock response in wild-type E. coli has been well studied. In this study, the transcriptome profiles of recombinant E. coli subjected to a heat-shock and to a dual heat-shock recombinant protein induction were examined. Most classical heat-shock protein genes were identified as regulated in both conditions. The major transcriptome differences between the recombinant and reported wild-type cultures were heavily populated by hypothetical and putative genes, which indicates recombinant cultures utilize many unique genes to respond to a heat-shock. Comparison of the dual stressed culture data with literature recombinant protein induced culture data revealed numerous differences. The dual stressed response encompassed three major response patterns: induced-like, in-between, and greater than either individual stress response. Also, there were no genes that only responded to the dual stress. The most interesting difference between the dual stressed and induced cultures was the amino acid-tRNA gene levels. The amino acid-tRNA genes were elevated for the dual cultures compared to the induced cultures. Since tRNAs facilitate protein synthesis via translation, this observed increase in amino acid-tRNA transcriptome levels, in concert with elevated heat-shock chaperones, might account for improved productivities often observed for thermo-inducible systems. Most importantly, the response of the recombinant cultures to a heat-shock was more profound than wild-type cultures, and further, the response to recombinant protein induction was not a simple additive response of the individual stresses. The objective of the present work is to gain a better understanding of the heat-shock response in recombinant cultures and how this response might impact recombinant protein production. To accomplish this objective, the transcriptome response of recombinant cultures subjected to a heat-shock and a dual heat-shock recombinant protein induction were analyzed. The transcriptome levels were determined using Affymetrix E. coli Antisense DNA microarrays, such that the entire genome was evaluated. These two transcriptome responses were also compared to recombinant cultures at normal growth temperature that were not over-expressing the recombinant protein and a set of literature recombinant culture data that were chemically induced to over-express the recombinant protein. Additionally, the heat-shock response of the recombinant cultures was compared to the literature report of the heat-shock response in wild-type cultures. The results of the global transcriptome analysis demonstrated that recombinant cultures respond differently to a heat-shock stress than wild-type cultures, where the transcriptome response of the recombinant cultures is further modified by production of a recombinant protein.
2009-08-07 | GSE17507 | GEO