Abstract
Abstract Seedlings of six cultivars of tomato ( Lycopersicon esculentum Mill.) showed differences in chilling sensitivity depending on the time during the diurnal light/dark cycle when they were placed at low temperature. In all cultivars, sensitivity was highest when the chilling exposure started at the end of a dark period, although the magnitude of the diurnal variation differed among the cultivars. When roots were removed prior to or just after chilling, injury also appeared earlier in seedlings whose chilling was started at the end of a dark period. Seedlings chilled starting at different times during the diurnal cycle had similar stomatal conductance values during chilling. It appears that diurnal changes in chilling sensitivity are not due to altered root function during or following chilling exposure, nor to variations in desiccation during the chilling period resulting from diurnal differences in stomatal conductance.
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Claims 6
Claim · model-written summary
Six tomato cultivars differed in chilling sensitivity by the time exposure began.
- Taxon
- tomato
Solanum lycopersicume0 - Material
- six cultivarse0
- Treatment
- low temperaturee0
- Outcome
- chilling sensitivitye0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seedlings of six cultivars of tomato ( Lycopersicon esculentum Mill.) showed differences in chilling sensitivity depending on the time during the diurnal light/dark cycle when they were placed at low temperature”
Claim · model-written summary
Sensitivity was highest when chilling began at the end of darkness in all cultivars.
- Taxon
- cultivarse0
- Treatment
- chilling exposure started at the end of a dark periode0
- Outcome
- sensitivitye0
- Direction
- higheste0
Not reportedComparator
Verbatim
e0“In all cultivars, sensitivity was highest when the chilling exposure started at the end of a dark period”
Claim · model-written summary
The magnitude of diurnal sensitivity variation differed among cultivars.
- Taxon
- TomatoSolanum lycopersicumt0
- Material
- cultivarse0
- Outcome
- magnitude of the diurnal variatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the magnitude of the diurnal variation differed among the cultivars”
t0“Seedlings of Tomato”
Claim · model-written summary
With roots removed before or after chilling, injury appeared earlier when chilling began at the end of darkness.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- chilling was started at the end of a dark periode0
- Outcome
- injurye0
- Direction
- earliere0
- Qualifier
- roots were removed prior to or just after chillinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When roots were removed prior to or just after chilling, injury also appeared earlier in seedlings whose chilling was started at the end of a dark period”
t0“Seedlings of Tomato”
Claim · model-written summary
Seedlings chilled at different diurnal times had similar stomatal conductance during chilling.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- chilled starting at different times during the diurnal cyclee0
- Outcome
- stomatal conductance valuese0
- Direction
- similare0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seedlings chilled starting at different times during the diurnal cycle had similar stomatal conductance values during chilling”
t0“Seedlings of Tomato”
Claim · model-written summary
Authors infer that diurnal chilling sensitivity changes are not explained by altered root function or conductance-related desiccation.
- Taxon
- TomatoSolanum lycopersicumt0
- Outcome
- diurnal changes in chilling sensitivitye0
- Qualifier
- not due to altered root function during or following chilling exposure, nor to variations in desiccation during the chilling period resulting from diurnal differences in stomatal conductancee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“diurnal changes in chilling sensitivity are not due to altered root function during or following chilling exposure, nor to variations in desiccation during the chilling period resulting from diurnal differences in stomatal conductance”
t0“Seedlings of Tomato”
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