Abstract
The formation of ice on and inside plant tissues represents a major challenge to survival. The resulting phase transition and spatial redistribution of liquid water from inside the cell to extracellular ice results in physical changes to cells and enormous physical stresses and strains. The ability of higher plants to acclimate and tolerate freezing stress is a complex quantitative trait and the product of the activities of not one, but a sizable suite of genes. Many of the known cold-regulated genes are under the control of a primary master regulator, CBF/DREB1, but it is not likely to be the sole master regulator. In considering the origin of freezing tolerance in higher plants, it has been suggested that freezing tolerance likely arose by adopting drought tolerance mechanisms. This may explain why many genes responsive to cold stress are also responsive to drought and (or) other osmotic stresses.Key words: abiotic, dehydration, gene expression, physiology, signal transduction, transcriptome.
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Claims 5
Claim · model-written summary
Ice formation and redistribution of water to extracellular ice physically stress plant cells.
Verbatim
e0“The formation of ice on and inside plant tissues represents a major challenge to survival. The resulting phase transition and spatial redistribution of liquid water from inside the cell to extracellular ice results in physical changes to cells and enormous physical stresses and strains”
Claim · model-written summary
Freezing tolerance in higher plants is a complex quantitative trait involving many genes.
- Taxon
- higher plantsEmbryophytae0
- Gene
- genese0
- Outcome
- tolerate freezing stresse0
- Qualifier
- complex quantitative traite0
Verbatim
e0“The ability of higher plants to acclimate and tolerate freezing stress is a complex quantitative trait and the product of the activities of not one, but a sizable suite of genes”
Claim · model-written summary
CBF/DREB1 controls many known cold-regulated genes but is unlikely to be the sole master regulator.
- Taxon
- plantsViridiplantaet0
- Gene
- CBF/DREB1e0
- Outcome
- cold-regulated genese0
- Qualifier
- not likely to be the sole master regulatore0
Verbatim
e0“Many of the known cold-regulated genes are under the control of a primary master regulator, CBF/DREB1, but it is not likely to be the sole master regulator”
t0“plants”
Claim · model-written summary
Freezing tolerance in higher plants has been suggested to originate through adoption of drought tolerance mechanisms.
- Taxon
- higher plantsEmbryophytae0
- Outcome
- freezing tolerancee0
- Qualifier
- adopting drought tolerance mechanismse0
Verbatim
e0“freezing tolerance in higher plants, it has been suggested that freezing tolerance likely arose by adopting drought tolerance mechanisms”
Claim · model-written summary
Many cold responsive plant genes are also responsive to drought or other osmotic stresses.
- Taxon
- plantsViridiplantaet0
- Gene
- genese0
- Outcome
- responsive to drought and (or) other osmotic stressese0
Verbatim
e0“many genes responsive to cold stress are also responsive to drought and (or) other osmotic stresses”
t0“plants”