Abstract
Potato is a species commonly cultivated in temperate areas where the growing season may be interrupted by frosts, resulting in loss of yield. Cultivated potato, Solanum tuberosum , is freezing sensitive, but it has several freezing‐tolerant wild potato relatives, one of which is S. commersonii . Our study was aimed to resolve the relationship between enhanced freezing tolerance, acclimation capacity and capacity to tolerate active oxygen species. To be able to characterize freezing tolerant ideotypes, a potato population (S1), which segregates in freezing tolerance, acclimation capacity and capacity to tolerate superoxide radicals, was produced by selfing a somatic hybrid between a freezing‐tolerant Solanum commersonii (LT 50 =‐4.6°C) and ‐sensitive S. tuberosum (LT 50 =‐3.0°C). The distribution of non‐acclimated freezing tolerance (NA‐freezing tolerance) of the S1 population varied between the parental lines and we were able to identify genotypes, having significantly high or low NA‐freezing tolerance. When a population of 25 genotypes was tested both for NA‐freezing and paraquat (PQ) tolerance, no correlation was found between these two traits (R = 0.02). However, the most NA‐freezing tolerant genotypes were also among the most PQ tolerant plants. Simultaneously, one of the NA‐freezing sensitive genotypes (2022) (LT 50 =‐3.0°C) was observed to be PQ tolerant. These conflicting results may reflect a significant, but not obligatory, role of superoxide scavenging mechanisms in the NA‐freezing tolerance of S. commersonii . The freezing tolerance after cold acclimation (CA‐freezing tolerance) and the acclimation capacity (AC) was measured after acclimation for 7 days at 4/2°C. Lack of correlation between NA‐freezing tolerance and AC (R =‐0.05) in the S1 population points to independent genetic control of NA‐freezing tolerance and AC in Solanum sp. Increased freezing tolerance after cold acclimation was clearly related to PQ tolerance of all S1 genotypes, especially those having good acclimation capacity. The rapid loss of improved PQ tolerance under deacclimation conditions confirmed the close relationship between the process of cold acclimation and enhanced PQ tolerance. Here, we report an increased PQ tolerance in cold‐acclimated plants compared to non‐acclimated controls. However, we concluded that high PQ tolerance is not a good indicator of actual freezing tolerance and should not be used as a selectable marker for the identification of a freezing‐tolerant genotype.
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Claims 11
Claim · model-written summary
The S1 potato population segregated for freezing and paraquat tolerance.
- Taxon
- potato
Solanum tuberosume0 - Material
- S1e0
- Outcome
- freezing tolerance, acclimation capacity and capacity to tolerate superoxide radicalse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a potato population (S1), which segregates in freezing tolerance, acclimation capacity and capacity to tolerate superoxide radicals”
Claim · model-written summary
Non-acclimated freezing tolerance varied between the parental potato lines.
- Taxon
- potatoSolanum tuberosumt0
- Material
- S1 populatione0
- Outcome
- non‐acclimated freezing tolerancee0
- Direction
- variede0
- Comparator
- parental linese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The distribution of non‐acclimated freezing tolerance (NA‐freezing tolerance) of the S1 population varied between the parental lines”
t0“potato”
Claim · model-written summary
Potato genotypes with significantly high or low non-acclimated freezing tolerance were identified.
- Taxon
- potatoSolanum tuberosumt0
- Material
- genotypese0
- Outcome
- NA‐freezing tolerancee0
- Direction
- high or lowe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“we were able to identify genotypes, having significantly high or low NA‐freezing tolerance.”
t0“potato”
Claim · model-written summary
Non-acclimated freezing tolerance and paraquat tolerance were uncorrelated across 25 potato genotypes.
- Taxon
- potatoSolanum tuberosumt0
- Material
- 25 genotypese0
- Outcome
- NA‐freezing and paraquat (PQ) tolerancee0
- Direction
- no correlatione0
- Value
- R = 0.02e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When a population of 25 genotypes was tested both for NA‐freezing and paraquat (PQ) tolerance, no correlation was found between these two traits (R = 0.02).”
t0“potato”
Claim · model-written summary
The most non-acclimated freezing-tolerant potato genotypes were also among the most paraquat-tolerant.
- Taxon
- potatoSolanum tuberosumt0
- Material
- genotypese0
- Outcome
- PQ tolerante0
- Direction
- moste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the most NA‐freezing tolerant genotypes were also among the most PQ tolerant plants.”
t0“potato”
Claim · model-written summary
One non-acclimated freezing-sensitive genotype was paraquat tolerant.
- Taxon
- potatoSolanum tuberosumt0
- Material
- 2022e0
- Outcome
- PQ tolerante0
- Value
- LT 50 =‐3.0°Ce0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“one of the NA‐freezing sensitive genotypes (2022) (LT 50 =‐3.0°C) was observed to be PQ tolerant.”
t0“potato”
Claim · model-written summary
Non-acclimated freezing tolerance and acclimation capacity were uncorrelated in the potato S1 population.
- Taxon
- potatoSolanum tuberosumt0
- Material
- S1 populatione0
- Outcome
- NA‐freezing tolerance and ACe0
- Direction
- Lack of correlatione0
- Value
- R =‐0.05e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Lack of correlation between NA‐freezing tolerance and AC (R =‐0.05) in the S1 population”
t0“potato”
Claim · model-written summary
Increased freezing tolerance after cold acclimation was related to paraquat tolerance, especially in genotypes with good acclimation capacity.
- Taxon
- potatoSolanum tuberosumt0
- Material
- S1 genotypese0
- Outcome
- freezing tolerancee0
- Direction
- Increasede0
- Qualifier
- especially those having good acclimation capacitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increased freezing tolerance after cold acclimation was clearly related to PQ tolerance of all S1 genotypes, especially those having good acclimation capacity.”
t0“potato”
Claim · model-written summary
Improved paraquat tolerance rapidly declined during deacclimation.
- Taxon
- potatoSolanum tuberosumt0
- Outcome
- PQ tolerancee0
- Direction
- rapid losse0
- Qualifier
- deacclimation conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The rapid loss of improved PQ tolerance under deacclimation conditions”
t0“potato”
Claim · model-written summary
Cold-acclimated potato plants had greater paraquat tolerance than non-acclimated controls.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- cold‐acclimatede0
- Outcome
- PQ tolerancee0
- Direction
- increasede0
- Comparator
- non‐acclimated controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“we report an increased PQ tolerance in cold‐acclimated plants compared to non‐acclimated controls.”
t0“potato”
Claim · model-written summary
The authors advise against paraquat tolerance as a selection marker for freezing-tolerant potato.
- Taxon
- potatoSolanum tuberosumt0
- Outcome
- should not be used as a selectable markere0
- Qualifier
- freezing‐tolerant genotypee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“high PQ tolerance is not a good indicator of actual freezing tolerance and should not be used as a selectable marker for the identification of a freezing‐tolerant genotype.”
t0“potato”
The same questions in other papers
cold · disease · Solanum tuberosum (potato)Positive and negative results
3 papers in the same direction as this paper · 1 in the opposite direction
- negative
- positive
- positive
1 paper more in this group
See all 5 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.