Abstract
Abstract Aims Studies dealing with plants’ mineral nutrient status under elevated atmospheric CO 2 concentration (eCO 2 ) are usually conducted in closed hydroponic systems, in which nutrient solutions are entirely renewed every several days. Here, we investigated the contribution of the fluctuation of concentrations of N ([N]), P ([P]), and K ([K]) in nutrient solutions in this short period on their concentrations in cucumber plants exposed to different [CO 2 ] and N levels. Methods Cucumber ( Cucumis sativus L.) plants were hydroponically grown under two [CO 2 ] and three N levels. [N], [P], and [K] in nutrient solutions and cucumber plants were analyzed. Results The transpiration rate (Tr) was significantly inhibited by eCO 2 , whereas Tr per plant was increased due to the larger leaf area. Elevated [CO 2 ] significantly decreased [N] in low N nutrient solutions, which imposed an additional decrease in [N] in plants. [P] in nutrient solutions fluctuated slightly, so the change of [P] in plants might be attributed to the dilution effect and the demand change under eCO 2 . [K] in moderate and high N nutrient solutions were significantly decreased, which exacerbated the [K] decrease in plants under eCO 2 . Conclusions The short-term fluctuation of [N] and [K] in nutrient solutions is caused by the asynchronous uptakes of N, K, and water under eCO 2 , which has an appreciable influence on [N] and [K] in plants besides the dilution effect. This defect of the closed hydroponic system may let us exaggerate the negative impact of eCO 2 itself on [N] and [K] in plants.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 11
Claim · model-written summary
Elevated CO2 significantly inhibited cucumber transpiration rate.
- Taxon
- Cucumber
Cucumis sativuse1 - Treatment
- eCO 2e0
- Outcome
- transpiration rate (Tr)e0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The transpiration rate (Tr) was significantly inhibited by eCO 2”
e1“Cucumber ( Cucumis sativus L.) plants”
Claim · model-written summary
Transpiration per cucumber plant increased because of larger leaf area.
- Taxon
- CucumberCucumis sativuse1
- Organ / stage
- leafe0
- Outcome
- Tr per plante0
- Direction
- increasede0
- Qualifier
- larger leaf areae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Tr per plant was increased due to the larger leaf area”
e1“Cucumber ( Cucumis sativus L.) plants”
Claim · model-written summary
Elevated CO2 significantly lowered N concentration in low N nutrient solutions.
- Taxon
- CucumberCucumis sativuse1
- Treatment
- Elevated [CO 2 ]e0
- Outcome
- [N] in low N nutrient solutionse0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Elevated [CO 2 ] significantly decreased [N] in low N nutrient solutions”
e1“Cucumber ( Cucumis sativus L.) plants”
Claim · model-written summary
Reduced nutrient solution N imposed an additional decrease in cucumber N concentration.
- Taxon
- CucumberCucumis sativuse2
- Outcome
- [N] in plantse0
- Direction
- decreasee0
- Qualifier
- [N] in low N nutrient solutionse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“which imposed an additional decrease in [N] in plants”
e1“Elevated [CO 2 ] significantly decreased [N] in low N nutrient solutions”
e2“Cucumber ( Cucumis sativus L.) plants”
Claim · model-written summary
P concentration in nutrient solutions fluctuated slightly.
- Taxon
- CucumberCucumis sativuse1
- Outcome
- [P] in nutrient solutionse0
- Direction
- fluctuated slightlye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“[P] in nutrient solutions fluctuated slightly”
e1“Cucumber ( Cucumis sativus L.) plants”
Claim · model-written summary
Authors attributed plant P changes under elevated CO2 to dilution and changing demand.
- Taxon
- CucumberCucumis sativuse1
- Treatment
- eCO 2e0
- Outcome
- change of [P] in plantse0
- Qualifier
- dilution effect and the demand changee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the change of [P] in plants might be attributed to the dilution effect and the demand change under eCO 2”
e1“Cucumber ( Cucumis sativus L.) plants”
Claim · model-written summary
K concentration significantly decreased in moderate N nutrient solutions.
- Taxon
- CucumberCucumis sativuse1
- Treatment
- moderatee0
- Outcome
- [K] in moderate and high N nutrient solutionse0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“[K] in moderate and high N nutrient solutions were significantly decreased”
e1“Cucumber ( Cucumis sativus L.) plants”
Claim · model-written summary
K concentration significantly decreased in high N nutrient solutions.
- Taxon
- CucumberCucumis sativuse1
- Treatment
- high Ne0
- Outcome
- [K] in moderate and high N nutrient solutionse0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“[K] in moderate and high N nutrient solutions were significantly decreased”
e1“Cucumber ( Cucumis sativus L.) plants”
Claim · model-written summary
Lower nutrient solution K exacerbated decreased cucumber K under elevated CO2.
- Taxon
- CucumberCucumis sativuse2
- Treatment
- eCO 2e0
- Outcome
- [K] decrease in plantse0
- Qualifier
- [K] in moderate and high N nutrient solutionse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“which exacerbated the [K] decrease in plants under eCO 2”
e1“[K] in moderate and high N nutrient solutions were significantly decreased”
e2“Cucumber ( Cucumis sativus L.) plants”
Claim · model-written summary
Asynchronous nitrogen, potassium and water uptake caused short term nutrient solution N and K fluctuations.
- Taxon
- CucumberCucumis sativuse1
- Treatment
- eCO 2e0
- Outcome
- short-term fluctuation of [N] and [K] in nutrient solutionse0
- Qualifier
- asynchronous uptakes of N, K, and watere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The short-term fluctuation of [N] and [K] in nutrient solutions is caused by the asynchronous uptakes of N, K, and water under eCO 2”
e1“Cucumber ( Cucumis sativus L.) plants”
Claim · model-written summary
Authors concluded that closed hydroponic systems may exaggerate the negative effect of elevated CO2 on cucumber N and K.
- Taxon
- CucumberCucumis sativuse1
- Outcome
- negative impact of eCO 2 itself on [N] and [K] in plantse0
- Qualifier
- may let us exaggeratee0
Not reportedComparatorValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This defect of the closed hydroponic system may let us exaggerate the negative impact of eCO 2 itself on [N] and [K] in plants”
e1“Cucumber ( Cucumis sativus L.) plants”
The same questions in other papers
co2 · nutrient: content · Cucumis sativus (cucumber)Positive and negative results
3 papers in the same direction as this paper · 4 in the opposite direction
- no effect
- positive
- positive
4 papers more in this group
See all 8 papers →nitrogen · nutrient: content · Cucumis sativus (cucumber)Positive and negative results
6 papers in the same direction as this paper · 10 in the opposite direction
- positive
- positive
- positive
13 papers more in this group
See all 17 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.