Regulation of the Heat-Shock Response
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The heat-shock response is a conserved reaction of cells and organisms to elevated temperatures (heat shock or heat stress).Abstract:
The heat-shock response is a conserved reaction of cells and organisms to elevated temperatures (heat shock or heat stress). Whereas severe heat stress leads to cellular damage and cell death, sublethal doses of heat stress induce a cellular response, the heat-shock response, which (a) protectsread more
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Plant responses to drought, salinity and extreme temperatures: towards genetic engineering for stress tolerance
TL;DR: The present review summarizes the recent advances in elucidating stress-response mechanisms and their biotechnological applications and examines the following aspects: regulatory controls, metabolite engineering, ion transport, antioxidants and detoxification, late embryogenesis abundant (LEA) and heat-shock proteins.
Journal ArticleDOI
Arabidopsis transcription factors: genome-wide comparative analysis among eukaryotes.
José Luis Riechmann,Jacqueline E. Heard,George M. Martin,T. Lynne Reuber,Cai-Zhong Jiang,James S. Keddie,Luc Adam,Omaira Pineda,Oliver J. Ratcliffe,Raymond Samaha,Robert A. Creelman,Marsha Pilgrim,Pierre Broun,James Zhang,D. Ghandehari,Bradley K. Sherman,Guo-Liang Yu +16 more
TL;DR: The completion of the Arabidopsis thaliana genome sequence allows a comparative analysis of transcriptional regulators across the three eukaryotic kingdoms and reveals the evolutionary generation of diversity in the regulation of transcription.
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Photosynthetic carbon assimilation and associated metabolism in relation to water deficits in higher plants
David W. Lawlor,Gabriel Cornic +1 more
TL;DR: The primary effect of low RWC on Apot is most probably caused by limited RuBP synthesis, as a result of decreased ATP synthesis, either through inhibition of Coupling Factor activity or amount due to increased ion concentration.
Journal ArticleDOI
Functional analysis of oxidative stress-activated mitogen-activated protein kinase cascade in plants.
TL;DR: The authors showed that H2O2 is a potent activator of mitogen-activated protein kinases (MAPKs) in Arabidopsis leaf cells using epitope tagging and a protoplast transient expression assay.
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Water stress inhibits plant photosynthesis by decreasing coupling factor and ATP
TL;DR: It is shown that ATP-synthase (coupling factor) decreases with stress and concluded that photosynthetic assimilation of CO2 by stressed leaves is not limited by CO2 diffusion but by inhibition of ribulose biphosphate synthesis, related to lower ATP content resulting from loss of ATP synthase.
References
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An Hsp70 antisense gene affects the expression of HSP70/HSC70, the regulation of HSF, and the acquisition of thermotolerance in transgenic Arabidopsis thaliana.
Jeong Hee Lee,Fritz Schöffl +1 more
TL;DR: A dual role of HSP70 in plants, a protective role in thermotolerance and a regulatory effect on HSF activity and hence the autoregulation of the heat shock response is implied.
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A new method for manipulating transgenes: engineering heat tolerance in a complex, multicellular organism.
TL;DR: It is shown that manipulating the expression of a single hsp can be sufficient to improve the stress tolerance of a complex multicellular organism, and also that the role of the 70 kD heat-shock protein, Hsp 70, in thermotolerance is investigated.
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The regulatory domain of human heat shock factor 1 is sufficient to sense heat stress.
TL;DR: The regulatory domain is able to confer heat responsiveness to an otherwise completely heterologous chimeric activator that contains a portion of the VP16 activation domain, suggesting that the regulatory domain can sense heat in the absence of other portions of HSF1.
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Promoter melting and TFIID complexes on Drosophila genes in vivo.
TL;DR: Melting at the pause site persists upon heat shock induction of the hsp70 and hsp26 genes, indicating that pausing continues after gene activation, and some T residues of the TATA box were protected from KMnO4 modification in both induced and uninduced cells.
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Synergistic effect of upstream sequences, CCAAT box elements, and HSE sequences for enhanced expression of chimaeric heat shock genes in transgenic tobacco.
Mechthild Rieping,Fritz Schöffl +1 more
TL;DR: It is suggested that AT-rich sequences have a moderate effect on thermoinducible expression levels of the soybean heat shock gene and that CCAAT box sequences act cooporatively with HSEs to increase the hs promoter activity.