Abstract
Diurnal variation in the chilling sensitivity of `Rutgers' tomato ( Lycopersicon esculentum Mill.) seedlings was examined. Chilling sensitivity was highest in seedlings chilled at the end of the dark period, and these seedlings became more resistant to chilling injury on exposure to the light. The development of chilling tolerance in tomato seedlings was a response to light and not under the control of a circadian rhythm. The recovery of leaf gas exchange following chilling was faster in seedlings chilled at the end of the light period. Diurnal variation in chilling sensitivity was associated with changes in catalase and superoxide dismutase activities. An increase in catalase and superoxide dismutase activities was observed at the end of the light period. Catalase activity was significantly higher in all stages of chilling following the light period compared to those chilled after the end of the dark period. Forty-eight hours of 14 °C acclimation or pretreatment with hydrogen peroxide conferred increased chilling tolerance to tomato seedlings. Hydrogen peroxide-treated seedlings showed little evidence of a diurnal variation in chilling sensitivity. These results support a role for light and oxidative stress in conferring increased chilling tolerance to tomato seedlings.
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Claims 11
Claim · model-written summary
Chilling sensitivity of tomato seedlings was highest when chilled at the end of the dark period.
- Taxon
- tomato
Solanum lycopersicumt0 - Treatment
- chilled at the end of the dark periode0
- Outcome
- Chilling sensitivitye0
- Direction
- higheste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato Seedlings”
e0“Chilling sensitivity was highest in seedlings chilled at the end of the dark period”
Claim · model-written summary
Seedlings became more resistant to chilling injury on exposure to light.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- exposure to the lighte1
- Outcome
- chilling injurye1
- Direction
- more resistante1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato Seedlings”
e1“these seedlings became more resistant to chilling injury on exposure to the light”
Claim · model-written summary
Development of chilling tolerance in tomato seedlings is a response to light and not under circadian control.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- lighte2
- Outcome
- development of chilling tolerancee2
- Qualifier
- not under the control of a circadian rhythme2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato Seedlings”
e2“The development of chilling tolerance in tomato seedlings was a response to light and not under the control of a circadian rhythm”
Claim · model-written summary
Recovery of leaf gas exchange following chilling was faster in seedlings chilled at the end of the light period.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- chilled at the end of the light periode3
- Outcome
- recovery of leaf gas exchange following chillinge3
- Direction
- fastere3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato Seedlings”
e3“The recovery of leaf gas exchange following chilling was faster in seedlings chilled at the end of the light period”
Claim · model-written summary
Diurnal variation in chilling sensitivity was associated with changes in catalase and superoxide dismutase activities.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- Diurnal variation in chilling sensitivitye4
- Outcome
- catalase and superoxide dismutase activitiese4
- Direction
- changese4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato Seedlings”
e4“Diurnal variation in chilling sensitivity was associated with changes in catalase and superoxide dismutase activities”
Claim · model-written summary
Catalase and superoxide dismutase activities increased at the end of the light period.
- Taxon
- tomatoSolanum lycopersicumt0
- Outcome
- catalase and superoxide dismutase activitiese5
- Direction
- increasee5
- Qualifier
- at the end of the light periode5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato Seedlings”
e5“An increase in catalase and superoxide dismutase activities was observed at the end of the light period”
Claim · model-written summary
Catalase activity was significantly higher in chilling following the light period than in chilling after the end of the dark period.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- chilling following the light periode6
- Gene
- catalasee6
- Outcome
- Catalase activitye6
- Direction
- highere6
- Comparator
- chilled after the end of the dark periode6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato Seedlings”
e6“Catalase activity was significantly higher in all stages of chilling following the light period compared to those chilled after the end of the dark period”
Claim · model-written summary
Forty-eight hours of 14 °C acclimation conferred increased chilling tolerance to tomato seedlings.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- Forty-eight hours of 14 °C acclimatione7
- Outcome
- chilling tolerancee7
- Direction
- increasede7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato Seedlings”
e7“Forty-eight hours of 14 °C acclimation or pretreatment with hydrogen peroxide conferred increased chilling tolerance to tomato seedlings”
Claim · model-written summary
Pretreatment with hydrogen peroxide conferred increased chilling tolerance to tomato seedlings.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- pretreatment with hydrogen peroxidee7
- Outcome
- chilling tolerancee7
- Direction
- increasede7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato Seedlings”
e7“Forty-eight hours of 14 °C acclimation or pretreatment with hydrogen peroxide conferred increased chilling tolerance to tomato seedlings”
Claim · model-written summary
Hydrogen peroxide-treated seedlings showed little diurnal variation in chilling sensitivity.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- Hydrogen peroxide-treatede7
- Outcome
- diurnal variation in chilling sensitivitye7
- Direction
- little evidence ofe7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato Seedlings”
e7“Hydrogen peroxide-treated seedlings showed little evidence of a diurnal variation in chilling sensitivity”
Claim · model-written summary
Light and oxidative stress are supported as a role in conferring increased chilling tolerance to tomato seedlings.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- light and oxidative stresse7
- Outcome
- increased chilling tolerancee7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato Seedlings”
e7“These results support a role for light and oxidative stress in conferring increased chilling tolerance to tomato seedlings”
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See all 20 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.