Abstract
To figure out the effects of SA on plant photosynthesis characteristics during the recovery of the day after night chilling,with the‘Jinyou no.4'cucumber seedlings as materials,we studied the effect of exogenous SA on chlorophyll content,photosynthetic rate,chlorophyll fluorescence parameters and gas exchange parameters etc during the recovery(25℃)of the day after night chilling(5℃)using sand culture.The results showed that:(1)The exogenous SA treatment significantly promoted the normal temperature(25℃)recovery after night chilling stress,significantly improved the speed and level of recovery compared with H2O treatment,which significantly increased contents of chlorophyll,net photosynthetic rate(Pn),transpiration rate(Tr),stomatal conductance(Gs),and the intercellular CO2 concentration(Ci).At recovery6 h,the photosynthetic rate of cucumber seedlings reached 82.18%of control levels.(2)The exogenous SA significantly increased Fv/Fm,ΦPSⅡand ETR,which improved the NPQvalue and enhanced light protection.(3)Exogenous SA also contributed to the recovery of the apparent quantum yield(AQY)and carboxylation efficiency(CE)in cucumber seedlings,when recovery 2d,AQYand CEof cucumber leaves return to92.59%and 90.62%of control levels.Therefore,during recovery after night chilling stress,exogenous SA treatment could promote the recovery of photosynthesis of cucumber seedlings,and enhance its ability to adapt to chilling stress.
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Claims 8
Claim · model-written summary
SA increased chlorophyll content, net photosynthetic rate and transpiration rate during recovery.
- Taxon
- cucumber
Cucumis sativust0 - Treatment
- exogenous SAe1
- Outcome
- contents of chlorophyll,net photosynthetic rate(Pn),transpiration rate(Tr)e0
- Direction
- increasede0
- Comparator
- H2O treatmente1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“which significantly increased contents of chlorophyll,net photosynthetic rate(Pn),transpiration rate(Tr)”
e1“The exogenous SA treatment significantly promoted the normal temperature(25℃)recovery after night chilling stress,significantly improved the speed and level of recovery compared with H2O treatment”
t0“Cucumber Seedling Leaves during the Recovery of the Day after Night Chilling Stress”
Claim · model-written summary
SA increased stomatal conductance and intercellular CO2 concentration.
- Taxon
- cucumberCucumis sativust0
- Treatment
- exogenous SAe1
- Outcome
- stomatal conductance(Gs),and the intercellular CO2 concentration(Ci)e0
- Direction
- increasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“stomatal conductance(Gs),and the intercellular CO2 concentration(Ci)”
e1“The exogenous SA treatment significantly promoted the normal temperature(25℃)recovery after night chilling stress,significantly improved the speed and level of recovery compared with H2O treatment,which significantly increased”
t0“Cucumber”
Claim · model-written summary
At six hours of recovery, cucumber seedling photosynthetic rate reached 82.18% of control.
- Taxon
- cucumberCucumis sativuse0
- Outcome
- photosynthetic ratee0
- Value
- 82.18%e0
- Qualifier
- recovery6 he0
- Comparator
- control levelse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At recovery6 h,the photosynthetic rate of cucumber seedlings reached 82.18%of control levels”
Claim · model-written summary
SA increased Fv/Fm, ΦPSⅡ and ETR.
- Taxon
- CucumberCucumis sativust0
- Treatment
- exogenous SAe0
- Outcome
- Fv/Fm,ΦPSⅡand ETRe0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The exogenous SA significantly increased Fv/Fm,ΦPSⅡand ETR”
t0“Cucumber”
Claim · model-written summary
SA improved NPQ and enhanced light protection.
- Taxon
- CucumberCucumis sativust0
- Treatment
- Exogenous SAe1
- Outcome
- NPQvalue and enhanced light protectione0
- Direction
- improvede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“which improved the NPQvalue and enhanced light protection”
e1“Exogenous SA”
t0“Cucumber”
Claim · model-written summary
SA contributed to recovery of apparent quantum yield and carboxylation efficiency.
- Taxon
- cucumberCucumis sativuse0
- Treatment
- Exogenous SAe0
- Outcome
- apparent quantum yield(AQY)and carboxylation efficiency(CE)e0
- Direction
- recoverye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Exogenous SA also contributed to the recovery of the apparent quantum yield(AQY)and carboxylation efficiency(CE)in cucumber seedlings”
Claim · model-written summary
After two days, apparent quantum yield reached 92.59% of control.
- Taxon
- cucumberCucumis sativuse0
- Outcome
- AQYe0
- Value
- 92.59%e0
- Qualifier
- recovery 2de0
- Comparator
- control levelse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“when recovery 2d,AQYand CEof cucumber leaves return to92.59%and 90.62%of control levels”
Claim · model-written summary
After two days, carboxylation efficiency reached 90.62% of control.
- Taxon
- cucumberCucumis sativuse0
- Outcome
- CEe0
- Value
- 90.62%e0
- Qualifier
- recovery 2de0
- Comparator
- control levelse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“when recovery 2d,AQYand CEof cucumber leaves return to92.59%and 90.62%of control levels”
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See all 13 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.