Abstract
We studied the effect of cooling rate on responses of cucumber plants (Cucumis sativus L.) to a daily short-term (2 hour) temperature reduction (DROP) at the end of the night (dark DROP) or at the beginning of the day (light DROP). The temperature was lowered from 20° to 9 °C gradually (at a rate of 0.4 °C/min) or sharply (11 °C/min) by transferring plants from one climate chamber to another. This work has shown that under short-term exposure to low non-injurious temperatures a fast versus slow cooling have somewhat different effects on plants. DROP with rapid cooling had a more pronounced negative impact on the state of the photosynthetic apparatus of the plants and biomass accumulation compared to DROP with slow temperature decrease. The differences were more pronounced when plants were treated by light DROP, which indicates that the time of day, or rather the presence or absence of light at a time when the plants are exposed to low temperature plays a significant role. At the same time, a plant height, leaf emergence rate and leaf chilling tolerance changed under the influence of DROP regardless of the cooling rate. All these factors should be considered in laboratory experiments, when low temperature effects on plants are studied at rapid cooling, when temperature changes are achieved by transferring plants from one growth chamber to another.
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Claims 6
Claim · model-written summary
Rapid cooling had a more negative impact on cucumber photosynthetic apparatus than slow cooling.
- Taxon
- cucumber
Cucumis sativust0 - Treatment
- DROP with rapid coolinge0
- Outcome
- state of the photosynthetic apparatuse0
- Direction
- more pronounced negative impacte0
- Comparator
- DROP with slow temperature decreasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“DROP with rapid cooling had a more pronounced negative impact on the state of the photosynthetic apparatus of the plants and biomass accumulation compared to DROP with slow temperature decrease”
t0“CUCUMBER”
Claim · model-written summary
Rapid cooling more negatively affected cucumber biomass accumulation than slow cooling.
- Taxon
- cucumberCucumis sativust0
- Treatment
- DROP with rapid coolinge0
- Outcome
- biomass accumulatione0
- Direction
- more pronounced negative impacte0
- Comparator
- DROP with slow temperature decreasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“DROP with rapid cooling had a more pronounced negative impact on the state of the photosynthetic apparatus of the plants and biomass accumulation compared to DROP with slow temperature decrease”
t0“CUCUMBER”
Claim · model-written summary
Cooling-rate differences were more pronounced under light DROP.
- Taxon
- cucumberCucumis sativust0
- Treatment
- light DROPe0
- Outcome
- differencese0
- Direction
- more pronouncede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The differences were more pronounced when plants were treated by light DROP”
t0“CUCUMBER”
Claim · model-written summary
DROP changed cucumber height regardless of cooling rate.
- Taxon
- cucumberCucumis sativust0
- Treatment
- DROPe0
- Outcome
- plant heighte0
- Direction
- changede0
- Qualifier
- regardless of the cooling ratee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a plant height, leaf emergence rate and leaf chilling tolerance changed under the influence of DROP regardless of the cooling rate”
t0“CUCUMBER”
Claim · model-written summary
DROP changed cucumber leaf emergence rate regardless of cooling rate.
- Taxon
- cucumberCucumis sativust0
- Treatment
- DROPe0
- Outcome
- leaf emergence ratee0
- Direction
- changede0
- Qualifier
- regardless of the cooling ratee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a plant height, leaf emergence rate and leaf chilling tolerance changed under the influence of DROP regardless of the cooling rate”
t0“CUCUMBER”
Claim · model-written summary
DROP changed cucumber leaf chilling tolerance regardless of cooling rate.
- Taxon
- cucumberCucumis sativust0
- Treatment
- DROPe0
- Outcome
- leaf chilling tolerancee0
- Direction
- changede0
- Qualifier
- regardless of the cooling ratee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a plant height, leaf emergence rate and leaf chilling tolerance changed under the influence of DROP regardless of the cooling rate”
t0“CUCUMBER”
The same questions in other papers
processing · growth · Cucumis sativus (cucumber)Positive and negative results
7 papers in the same direction as this paper · 20 in the opposite direction
- positive
- positive
- positive
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See all 28 papers →processing · physiology: photosynthesis · Cucumis sativus (cucumber)Results agree
1 paper in the same direction as this paper
- negative
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.