Arabidopsis thaliana
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA188454 | ENA |
REPOSITORIES: ENA
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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.
2020-12-15 | GSE145795 | GEO
Project description:Environmental stress is detrimental to plants viability and requires an adequate reprogramming of cellular activities to maximize plant survival. We present a global analysis of the adaptive stress response of Arabidopsis thaliana to prolonged heat stress. We combine deep sequencing of RNA and ribosome protected fragments to provide genome wide map of adaptation to heat stress on at transcriptional and translational level. Our analysis shows that the genes with the highest upregulation upon heat stress are known heat-responsive gene, chaperons and other genes involved in protein folding control. Majority of these genes exhibits increase on both transcriptional and translational level. No translational inhibition or ribosome stalling was observed, which can be observed in the early thermal stress response, indicating that plants alter their cellular composition in order to adapt to the prolonged exposure to increased temperatures.
2016-10-13 | GSE69802 | GEO
Project description:Adequate reprogramming of global translation under stress is of critical importance to cell survival in eukaryotes. The phosphorylation of eukaryotic initiation factor-2α is a major pathway for stress-induced translational arrest in animals. Here we report that eIF2α phosphorylation is not induced by heat in Arabidopsis. Instead, we identify an uncharacterized protein, FUST1, that can directly sense heat and initiate translational shutdown in Arabidopsis. FUST1 exhibits heat-dependent condensation both in vivo and in vitro, which is mainly driven by its prion-like domain (PrLD). Molecular dynamic simulation reveals that PrLD undergoes conformational rearrangements and engages more inter-amino acid interactions as temperature increases. Mutations that block this conformational change also diminish FUST1 condensation in vitro and in vivo and impair heat tolerance. FUST1 condensates preferentially partition mRNAs of greater length via electrostatic interactions, recruit translation repressors and RNA decapping and deadenylation factors. Importantly, disruption of FUST1 condensation dramatically compromises translational arrest under heat. As a result, FUST1 condensation precedes and is necessary for the assembly of heat stress granules. These findings thus uncover FUST1 as a molecular switch for translation under heat stress and shed light on engineering of heat-adaptable crops.
2023-10-10 | GSE244763 | GEO
Project description:We analysed the translatome and transcriptome of Arabidopsis thaliana Col-0 WT at five distinct physiological states during seed germination. The aim was to obtain a global overview of genes under translational control during seed-seedling transition.
2016-11-18 | GSE65780 | GEO
Project description:We examined the possible effects of hypertonic stress on Arabidopsis translatome using polysome profiling. We found that the translatome is partly and rapidly reprogrammed in response to hypertonic stress, and such translatome reprogramming is DCP5-dependent.
2022-01-20 | GSE193804 | GEO
Project description:Loss of the nuclear-encoded brain-specific arginine UCU tRNA, n-Tr20, gene increases seizure threshold in mice, and alters inhibitory neurotransmission in the hippocampus. We investigated the molecular impact of loss of n-Tr20 expression on the trancriptome and translatome in the forebrain and hippocampus of multiple n-Tr20 mutant and control strains. Loss of n-Tr20 altered translation initiation by activating the integrated stress response and suppressing mTOR signaling, the latter of which contributes to the enhanced GABAergic transmission.
2020-06-04 | GSE151742 | GEO
Project description:Background: Heat stress triggers an evolutionarily conserved set of responses in cells. The transcriptome responds to hyperthermia by altering expression of genes to adapt the cell or organism to survive the heat challenge. RNA-seq technology allows rapid identification of environmentally responsive genes on a large scale. In this study, we have used RNA -seq to identify heat stress responsive genes in the chicken male white-leghorn hepat ocellular (LMH) cell line. Result: The transcripts of 812 genes were responsive to heat stress (p <0.01) with 235 genes up- regulated and 577 down-regulated following 2.5 hours of heat stress. Among the up- regulated were genes whose products function as chaperones, along with genes aff ecting collagen synthesis and deposition, transcription factors, chromatin remodelers and genes modulating the WNT and TGF-beta pathways. Predominant among the down-regulated genes were ones that affect DNA replication and repair along with chromosom al segregation. Many of the genes identified in this study have not been previously implicated in the heat stress response. Conclusion: These data extend our understanding of the transcriptome response to heat stress. Many of the identified biological processes and pathways likely function in adapting cells and organisms to hyperthermic stress. This study may provide important guides to future efforts attempting to improve species abilities to withstand heat stress through genome wide association studies and breeding. In addition, the genes down regulated by heat stress may provide important targets for improving hyperthemic treatment in cancer patients. Cells were grown at either control ( 37oC) or heat stress (43oC) temperatures for 2.5 hours.
2015-02-24 | E-GEOD-55321 | biostudies-arrayexpress
Project description:We analyzed the dynamics of changes in the level of DNA methylation in Arabidopsis thaliana under the influence of heat stress. For this purpose whole-genome sequencing of sodium bisulfite treated DNA was performed. The analysis was carried out at seven time points taking into account control conditions, heat stress and return to control conditions after stopping stress treatment. The analysis showed that under the influence of heat stress there is a global decrease in the level of DNA methylation in Arabidopsis thaliana in all three sequence contexts (CpG, CHG, CHH).
2019-11-06 | GSE139941 | GEO
Project description:To understand plant adaptation to heat stress, gene expression profiles of Arabidopsis leaves under heat stress, during recovery and control condition were obtained using microarray. Microarray data listed responsible candidate genes for glycerolipid metabolism.
2015-05-27 | GSE63128 | GEO
Project description:To understand affected genes by overexpression of origouridylate binding protein 1b (UBP1b) under heat stress conditions, transcriptional profiling of UBP1box and control plants were analyzed under normal and heat stress (40°C) conditions using Arabidopsis custom microarrays.
2016-08-21 | GSE78713 | GEO