Abstract
Treatments as diverse as exposure to low temperature (LT), exogenous abscisic acid (ABA), or drought resulted in a 4 to 5[deg]C increase in freezing tolerance of the annual herbaceous plant Arabidopsis thaliana. To correlate the increase in freezing tolerance with the physiological changes that occur in response to these treatments, we studied the alterations in water status, endogenous ABA levels, and accumulation of rab18 (V. Lang and E.T. Palva [1992] Plant Mol Biol 20: 951-962) mRNA. Exposure to LT and exogenous ABA caused only a minor decline in total water potential ([psi]w), in contrast to a dramatic decrease in [psi]w during drought stress. Similarly, the endogenous ABA levels were only slightly and transiently increased in LT-treated plants in contrast to a massive increase in ABA levels in drought-stressed plants. The expression of the ABA-responsive rab18 gene was low during the LT treatment but could be induced to high levels by exogenous ABA and drought stress. Taken together, these results suggest that the moderate increases in freezing tolerance of A. thaliana might be achieved by different mechanisms. However, ABA-deficient and ABA-insensitive mutants of A. thaliana have impaired freezing tolerance, suggesting that ABA is, at least indirectly, required for the development of full freezing tolerance.
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Claims 12
Claim · model-written summary
Low temperature raised freezing tolerance by 4 to 5 degrees C.
- Taxon
- Arabidopsis thaliana
Arabidopsis thalianae0 - Treatment
- exposure to low temperature (LT)e0
- Outcome
- freezing tolerancee0
- Direction
- increasee0
- Value
- 4 to 5[deg]Ce0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Treatments as diverse as exposure to low temperature (LT), exogenous abscisic acid (ABA), or drought resulted in a 4 to 5[deg]C increase in freezing tolerance of the annual herbaceous plant Arabidopsis thaliana.”
Claim · model-written summary
Exogenous ABA raised freezing tolerance by 4 to 5 degrees C.
- Taxon
- Arabidopsis thalianaArabidopsis thalianae0
- Treatment
- exogenous abscisic acid (ABA)e0
- Outcome
- freezing tolerancee0
- Direction
- increasee0
- Value
- 4 to 5[deg]Ce0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Treatments as diverse as exposure to low temperature (LT), exogenous abscisic acid (ABA), or drought resulted in a 4 to 5[deg]C increase in freezing tolerance of the annual herbaceous plant Arabidopsis thaliana.”
Claim · model-written summary
Drought raised freezing tolerance by 4 to 5 degrees C.
- Taxon
- Arabidopsis thalianaArabidopsis thalianae0
- Treatment
- droughte0
- Outcome
- freezing tolerancee0
- Direction
- increasee0
- Value
- 4 to 5[deg]Ce0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Treatments as diverse as exposure to low temperature (LT), exogenous abscisic acid (ABA), or drought resulted in a 4 to 5[deg]C increase in freezing tolerance of the annual herbaceous plant Arabidopsis thaliana.”
Claim · model-written summary
Low temperature and exogenous ABA caused only minor declines in water potential.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Treatment
- LT and exogenous ABAe0
- Outcome
- total water potential ([psi]w)e0
- Direction
- declinee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Exposure to LT and exogenous ABA caused only a minor decline in total water potential ([psi]w)”
t0“Arabidopsis thaliana”
Claim · model-written summary
Drought dramatically decreased water potential.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Treatment
- drought stresse0
- Outcome
- [psi]we0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a dramatic decrease in [psi]w during drought stress.”
t0“Arabidopsis thaliana”
Claim · model-written summary
Low temperature raised endogenous ABA only slightly and transiently.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Treatment
- LT-treatede0
- Outcome
- endogenous ABA levelse0
- Direction
- increasede0
- Qualifier
- only slightly and transientlye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the endogenous ABA levels were only slightly and transiently increased in LT-treated plants”
t0“Arabidopsis thaliana”
Claim · model-written summary
Drought massively increased endogenous ABA.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Treatment
- drought-stressede0
- Outcome
- ABA levelse0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a massive increase in ABA levels in drought-stressed plants.”
t0“Arabidopsis thaliana”
Claim · model-written summary
rab18 expression was low during low-temperature treatment.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Treatment
- LT treatmente0
- Gene
- rab18 genee0
- Outcome
- expression of the ABA-responsive rab18 genee0
- Direction
- lowe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The expression of the ABA-responsive rab18 gene was low during the LT treatment”
t0“Arabidopsis thaliana”
Claim · model-written summary
Exogenous ABA induced high rab18 expression.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Treatment
- exogenous ABAe0
- Gene
- rab18e1
- Outcome
- high levelse0
- Direction
- inducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“could be induced to high levels by exogenous ABA and drought stress.”
t0“Arabidopsis thaliana”
e1“ABA-responsive rab18 gene”
Claim · model-written summary
Drought induced high rab18 expression.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Treatment
- drought stresse0
- Gene
- rab18e1
- Outcome
- high levelse0
- Direction
- inducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“could be induced to high levels by exogenous ABA and drought stress.”
t0“Arabidopsis thaliana”
e1“ABA-responsive rab18 gene”
Claim · model-written summary
ABA-deficient mutants had impaired freezing tolerance.
- Taxon
- A. thalianaArabidopsis thalianae0
- Material
- ABA-deficiente0
- Outcome
- freezing tolerancee0
- Direction
- impairede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“ABA-deficient and ABA-insensitive mutants of A. thaliana have impaired freezing tolerance”
Claim · model-written summary
ABA-insensitive mutants had impaired freezing tolerance.
- Taxon
- A. thalianaArabidopsis thalianae0
- Material
- ABA-insensitivee0
- Outcome
- freezing tolerancee0
- Direction
- impairede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“ABA-deficient and ABA-insensitive mutants of A. thaliana have impaired freezing tolerance”
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See all 7 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.