Abstract
Transcript accumulation and protein activation of superoxide dismutase (SOD) isoenzymes were studied during cold acclimation in potato genotypes of varying degrees of freezing tolerance. In all genotypes studied, 2 days of cold acclimation led to increased SOD activity in concert with improved freezing tolerance. In freezing-tolerant Solanum commersonii Dun. (SCMM), the increase was most probably due to enhanced CuZnSOD isoenzyme activity. Compared to freezing sensitive S. tuberosum (SPV11), only slightly higher SOD activity was detected in SCMM. In potato hybrids (S. commersonii×S. tuberosum SPV11) there was no correlation between SOD activity and freezing tolerance. Although freezing tolerance continued to improve up to 7 days during cold acclimation, elevated SOD levels were measured only in two potato hybrids. Thus, the genotype's freezing tolerance or cold acclimation capacity was not related to the level of SOD activity. Mitochondrial MnSOD transcript, accumulated in potato genotypes which were able to cold acclimate although elevated MnSOD isoenzyme activity, was not always detected. The MnSOD transcript accumulation was probably an indicator of mitochondrial activity during cold acclimation. These results suggest that although SOD activity may contribute to the freezing tolerance and acclimation capacity, traits other than SOD activity were more important for the expression of freezing tolerance in potato hybrids.
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Claims 12
Claim · model-written summary
Two days of cold acclimation increased SOD activity in all studied potato genotypes.
Not reportedComparator
Verbatim
e0“In all genotypes studied, 2 days of cold acclimation led to increased SOD activity in concert with improved freezing tolerance.”
Claim · model-written summary
Two days of cold acclimation improved freezing tolerance in all studied potato genotypes.
- Taxon
- potato
Solanum tuberosumt0 - Treatment
- 2 days of cold acclimatione0
- Outcome
- freezing tolerancee0
- Direction
- improvede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“potato”
e0“In all genotypes studied, 2 days of cold acclimation led to increased SOD activity in concert with improved freezing tolerance.”
Claim · model-written summary
Enhanced CuZnSOD isoenzyme activity probably explained the SOD increase in freezing-tolerant SCMM.
- Taxon
- potatoSolanum tuberosumt0
- Material
- Solanum commersonii Dun. (SCMM)e0
- Gene
- CuZnSOD isoenzymee0
- Outcome
- the increasee0
- Qualifier
- most probablye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“potato”
e0“In freezing-tolerant Solanum commersonii Dun. (SCMM), the increase was most probably due to enhanced CuZnSOD isoenzyme activity.”
Claim · model-written summary
SCMM had only slightly higher SOD activity than freezing-sensitive SPV11.
- Taxon
- potatoSolanum tuberosumt0
- Material
- SCMMe0
- Outcome
- SOD activitye0
- Direction
- slightly highere0
- Comparator
- S. tuberosum (SPV11)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“potato”
e0“Compared to freezing sensitive S. tuberosum (SPV11), only slightly higher SOD activity was detected in SCMM.”
Claim · model-written summary
SOD activity did not correlate with freezing tolerance in potato hybrids.
- Taxon
- potatoSolanum tuberosume0
- Material
- potato hybrids (S. commersonii×S. tuberosum SPV11)e0
- Outcome
- freezing tolerancee0
- Direction
- no correlatione0
- Qualifier
- SOD activitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In potato hybrids (S. commersonii×S. tuberosum SPV11) there was no correlation between SOD activity and freezing tolerance.”
Claim · model-written summary
Freezing tolerance continued to improve through seven days of cold acclimation.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- cold acclimatione0
- Outcome
- freezing tolerancee0
- Direction
- improvee0
- Qualifier
- up to 7 dayse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“potato”
e0“freezing tolerance continued to improve up to 7 days during cold acclimation”
Claim · model-written summary
Only two potato hybrids showed elevated SOD levels during cold acclimation.
- Taxon
- potatoSolanum tuberosume0
- Material
- potato hybridse0
- Outcome
- SOD levelse0
- Direction
- elevatede0
- Value
- twoe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“elevated SOD levels were measured only in two potato hybrids.”
Claim · model-written summary
Mitochondrial MnSOD transcript accumulated in potato genotypes able to cold acclimate.
- Taxon
- potatoSolanum tuberosume0
- Gene
- Mitochondrial MnSOD transcripte0
- Outcome
- MnSOD transcript, accumulatede0
- Qualifier
- able to cold acclimatee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Mitochondrial MnSOD transcript, accumulated in potato genotypes which were able to cold acclimate”
Claim · model-written summary
Elevated MnSOD isoenzyme activity was not always detected in genotypes with MnSOD transcript accumulation.
- Taxon
- potatoSolanum tuberosumt0
- Gene
- MnSOD isoenzymee0
- Outcome
- elevated MnSOD isoenzyme activity, was not always detectede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“potato”
e0“although elevated MnSOD isoenzyme activity, was not always detected.”
Claim · model-written summary
Authors interpret MnSOD transcript accumulation as a probable indicator of mitochondrial activity.
- Taxon
- potatoSolanum tuberosumt0
- Gene
- MnSOD transcripte0
- Outcome
- mitochondrial activitye0
- Qualifier
- probably an indicatore0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“potato”
e0“The MnSOD transcript accumulation was probably an indicator of mitochondrial activity during cold acclimation.”
Claim · model-written summary
Authors conclude SOD level was unrelated to genotype freezing tolerance or acclimation capacity.
- Taxon
- potatoSolanum tuberosumt0
- Gene
- SODe0
- Outcome
- freezing tolerance or cold acclimation capacitye0
- Direction
- not relatede0
- Qualifier
- level of SOD activitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“potato”
e0“the genotype's freezing tolerance or cold acclimation capacity was not related to the level of SOD activity.”
Claim · model-written summary
Authors suggest traits besides SOD activity were more important for potato hybrid freezing tolerance.
- Taxon
- potatoSolanum tuberosume0
- Material
- potato hybridse0
- Outcome
- expression of freezing tolerancee0
- Qualifier
- traits other than SOD activity were more importante0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“traits other than SOD activity were more important for the expression of freezing tolerance in potato hybrids.”
The same questions in other papers
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- positive
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3 papers in the same direction as this paper
- positive
- positive
- positive
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.