Arabidopsis and the heat stress transcription factor world: how many heat stress transcription factors do we need?
Lutz Nover,Kapil Bharti,Pascal Döring,Shravan Kumar Mishra,Arnab Ganguli,Klaus-Dieter Scharf +5 more
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TLDR
Sequencing of the Arabidopsis genome revealed a unique complexity of the plant heat stress transcription factor (Hsf) family, and a new class of Hsfs (AtHsfC1) closely related to Hsf1 from rice and to HsFS identified from frequently found expressed sequence tags of tomato, potato, barley, and soybean.Abstract:
Sequencing of the Arabidopsis genome revealed a unique complexity of the plant heat stress transcription factor (Hsf) family. By structural characteristics and phylogenetic comparison, the 21 representatives are assigned to 3 classes and 14 groups. Particularly striking is the finding of a new class of Hsfs (AtHsfC1) closely related to Hsf1 from rice and to Hsfs identified from frequently found expressed sequence tags of tomato, potato, barley, and soybean. Evidently, this new type of Hsf is well expressed in different plant tissues. Besides the DNA binding and oligomerization domains (HR-A/B region), we identified other functional modules of Arabidopsis Hsfs by sequence comparison with the well-characterized tomato Hsfs. These are putative motifs for nuclear import and export and transcriptional activation (AHA motifs). There is intriguing flexibility of size and sequence in certain parts of the otherwise strongly conserved N-terminal half of these Hsfs. We have speculated about possible exon-intron borders in this region in the ancient precursor gene of plant Hsfs, similar to the exon-intron structure of the present mammalian Hsf-encoding genes.read 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.
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The effect of drought and heat stress on reproductive processes in cereals.
TL;DR: The results achieved so far indicate that various plant organs, in a definite hierarchy and in interaction with each other, are involved in determining crop yield under stress.
Journal ArticleDOI
When Defense Pathways Collide. The Response of Arabidopsis to a Combination of Drought and Heat Stress
Ludmila Rizhsky,Hongjian Liang,Joel L. Shuman,Vladimir Shulaev,Sholpan Davletova,Ron Mittler +5 more
TL;DR: In this paper, the response of Arabidopsis plants to a combination of drought and heat stress was found to be distinct from that of plants subjected to either drought or heat stress, and the authors highlighted the plasticity of the plant genome and demonstrate its ability to respond to complex environmental conditions that occur in the field.
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Physiological, biochemical, and molecular mechanisms of heat stress tolerance in plants
TL;DR: The recent findings on responses, adaptation, and tolerance to HT at the cellular, organellar, and whole plant levels are reviewed and various approaches being taken to enhance thermotolerance in plants are described.
Journal ArticleDOI
Plant tolerance to high temperature in a changing environment: scientific fundamentals and production of heat stress-tolerant crops
Craita E. Bita,Tom Gerats +1 more
TL;DR: There is a differential effect of climate change both in terms of geographic location and the crops that will likely show the most extreme reductions in yield as a result of expected extreme fluctuations in temperature and global warming in general.
References
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Yeast heat shock factor is an essential DNA-binding protein that exhibits temperature-dependent phosphorylation
Peter K. Sorger,Hugh R.B. Pelham +1 more
TL;DR: It is proposed that the expression of heat shock genes in yeast is modulated by phosphorylation of DNA-bound HSF, and that this leads to a more efficient interaction of the factor with other components of the transcriptional machinery.