Abstract
ABSTRACT Influences of nickel (Ni) concentrations in the nutrient solution on yield, quality, and nitrogen (N) metabolism of cucumber plants (Cucumis sativus cv ‘RS189’ and ‘Vikima’) were evaluated when plants were grown either with urea or nitrate as the sole N source. The cucumber plants were treated with two N sources, urea and nitrate as sodium nitrate (NaNO3) at 200 mg L−1, and three concentrations of Ni as nickel sulfate (NiSO4·6H2O; 0, 0.5, and 1 mg L−1). Treatments were arranged in a randomized block design with six replicates. The highest concentration of Ni in the leaves (1.2 mg kg−1 Dwt) was observed in the urea-fed plants at 1 mg L−1 Ni concentration. Additions of Ni up to 0.5 mg L−1 had no effect on the fruit Ni concentration in the both urea and nitrate-fed plants. Yield significantly (p < 0.05) increased with the Ni supplements from 0 to 0.5 mg L−1 (10 and 15% in ‘RS189’ and ‘Vikima’, respectively), but decreased when 1 mg L−1 Ni applied to the solutions in urea-fed plants. Nitrate-fed plants had a higher percentage of total soluble solids compare to those urea-fed plants. Nitrate concentrations of the fruits in urea-fed plants in both cultivars were reduced by approximately 50% compared to those nitrate-fed plants. The reduction of nitrate concentration in the fruits became more pronounced as the Ni concentration increased in the solution. The rate of photosynthesis (Pn) increased with the increase of the Ni concentration in the solution with urea-fed plants. Both N concentration and nitrate reductase (NR) activity of young leaves were higher in urea-fed plants at 0.5 mg l−1 Ni concentration. Ni supplements enhanced the growth and yield of urea-fed plants by increasing Pn, N concentration and NR activity. It can be concluded that Ni supplements (0.5 mg l−1) improve yield, quality, and NR activity in urea-fed cucumber plants.
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Claims 14
Claim · model-written summary
Leaf nickel concentration was highest at 1.2 mg kg−1 dry weight in urea-fed plants receiving 1 mg L−1 Ni.
- Taxon
- Cucumber
Cucumis sativust0 - Organ / stage
- leavese0
- Treatment
- 1 mg L−1 Nie0
- Outcome
- concentration of Ni in the leavese0
- Direction
- higheste0
- Value
- 1.2 mg kg−1 Dwte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest concentration of Ni in the leaves (1.2 mg kg−1 Dwt) was observed in the urea-fed plants at 1 mg L−1 Ni concentration.”
t0“Cucumber”
Claim · model-written summary
Adding Ni up to 0.5 mg L−1 did not change fruit Ni concentration in urea-fed cucumber.
- Taxon
- CucumberCucumis sativust0
- Treatment
- Ni up to 0.5 mg L−1e0
- Outcome
- fruit Ni concentratione0
- Direction
- no effecte0
- Qualifier
- ureae0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Additions of Ni up to 0.5 mg L−1 had no effect on the fruit Ni concentration in the both urea and nitrate-fed plants.”
t0“Cucumber”
Claim · model-written summary
Adding Ni up to 0.5 mg L−1 did not change fruit Ni concentration in nitrate-fed cucumber.
- Taxon
- CucumberCucumis sativust0
- Treatment
- Ni up to 0.5 mg L−1e0
- Outcome
- fruit Ni concentratione0
- Direction
- no effecte0
- Qualifier
- nitrate-fede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Additions of Ni up to 0.5 mg L−1 had no effect on the fruit Ni concentration in the both urea and nitrate-fed plants.”
t0“Cucumber”
Claim · model-written summary
Increasing Ni from 0 to 0.5 mg L−1 significantly raised yield by 10% in RS189.
- Taxon
- CucumberCucumis sativust0
- Material
- ‘RS189’e0
- Treatment
- Ni supplements from 0 to 0.5 mg L−1e0
- Outcome
- Yielde0
- Direction
- increasede0
- Value
- 10e0
- Comparator
- 0e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Yield significantly (p < 0.05) increased with the Ni supplements from 0 to 0.5 mg L−1 (10 and 15% in ‘RS189’ and ‘Vikima’, respectively)”
t0“Cucumber”
Claim · model-written summary
Increasing Ni from 0 to 0.5 mg L−1 significantly raised yield by 15% in Vikima.
- Taxon
- CucumberCucumis sativust0
- Material
- ‘Vikima’e0
- Treatment
- Ni supplements from 0 to 0.5 mg L−1e0
- Outcome
- Yielde0
- Direction
- increasede0
- Value
- 15%e0
- Comparator
- 0e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Yield significantly (p < 0.05) increased with the Ni supplements from 0 to 0.5 mg L−1 (10 and 15% in ‘RS189’ and ‘Vikima’, respectively)”
t0“Cucumber”
Claim · model-written summary
Yield decreased at 1 mg L−1 Ni in urea-fed cucumber.
- Taxon
- CucumberCucumis sativust0
- Treatment
- 1 mg L−1 Nie0
- Outcome
- Yielde1
- Direction
- decreasede0
- Qualifier
- urea-fed plantse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“but decreased when 1 mg L−1 Ni applied to the solutions in urea-fed plants”
t0“Cucumber”
e1“Yield significantly (p < 0.05) increased with the Ni supplements from 0 to 0.5 mg L−1”
Claim · model-written summary
Nitrate-fed cucumber had higher total soluble solids than urea-fed plants.
- Taxon
- CucumberCucumis sativust0
- Treatment
- Nitrate-fede0
- Outcome
- percentage of total soluble solidse0
- Direction
- highere0
- Comparator
- urea-fed plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrate-fed plants had a higher percentage of total soluble solids compare to those urea-fed plants.”
t0“Cucumber”
Claim · model-written summary
Fruit nitrate concentrations in urea-fed cucumber were about 50% below nitrate-fed plants in both cultivars.
- Taxon
- CucumberCucumis sativust0
- Organ / stage
- fruitse0
- Treatment
- urea-fede0
- Outcome
- Nitrate concentrations of the fruitse0
- Direction
- reducede0
- Value
- approximately 50%e0
- Comparator
- nitrate-fed plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrate concentrations of the fruits in urea-fed plants in both cultivars were reduced by approximately 50% compared to those nitrate-fed plants.”
t0“Cucumber”
Claim · model-written summary
Increasing solution Ni made the reduction in cucumber fruit nitrate concentration more pronounced.
- Taxon
- CucumberCucumis sativust0
- Treatment
- Ni concentratione0
- Outcome
- reduction of nitrate concentration in the fruitse0
- Direction
- more pronouncede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The reduction of nitrate concentration in the fruits became more pronounced as the Ni concentration increased in the solution.”
t0“Cucumber”
Claim · model-written summary
Photosynthesis rate increased with Ni concentration in urea-fed cucumber.
- Taxon
- CucumberCucumis sativust0
- Treatment
- Ni concentratione0
- Outcome
- rate of photosynthesis (Pn)e0
- Direction
- increasede0
- Qualifier
- urea-fed plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The rate of photosynthesis (Pn) increased with the increase of the Ni concentration in the solution with urea-fed plants.”
t0“Cucumber”
Claim · model-written summary
Young-leaf N concentration was higher in urea-fed cucumber at 0.5 mg l−1 Ni.
- Taxon
- CucumberCucumis sativust0
- Organ / stage
- young leavese0
- Treatment
- 0.5 mg l−1 Nie0
- Outcome
- N concentratione0
- Direction
- highere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both N concentration and nitrate reductase (NR) activity of young leaves were higher in urea-fed plants at 0.5 mg l−1 Ni concentration.”
t0“Cucumber”
Claim · model-written summary
Young-leaf nitrate reductase activity was higher in urea-fed cucumber at 0.5 mg l−1 Ni.
- Taxon
- CucumberCucumis sativust0
- Organ / stage
- young leavese0
- Treatment
- 0.5 mg l−1 Nie0
- Gene
- nitrate reductase (NR)e0
- Outcome
- nitrate reductase (NR) activitye0
- Direction
- highere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both N concentration and nitrate reductase (NR) activity of young leaves were higher in urea-fed plants at 0.5 mg l−1 Ni concentration.”
t0“Cucumber”
Claim · model-written summary
The authors attributed enhanced growth and yield under Ni supplementation in urea-fed cucumber to higher photosynthesis, nitrogen concentration and nitrate reductase activity.
- Taxon
- CucumberCucumis sativust0
- Treatment
- Ni supplementse0
- Outcome
- growth and yielde0
- Qualifier
- by increasing Pn, N concentration and NR activitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ni supplements enhanced the growth and yield of urea-fed plants by increasing Pn, N concentration and NR activity.”
t0“Cucumber”
Claim · model-written summary
The authors concluded that 0.5 mg l−1 Ni supplements improve yield, quality and nitrate reductase activity in urea-fed cucumber.
- Taxon
- cucumberCucumis sativuse0
- Treatment
- Ni supplements (0.5 mg l−1)e0
- Outcome
- improve yield, quality, and NR activitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“It can be concluded that Ni supplements (0.5 mg l−1) improve yield, quality, and NR activity in urea-fed cucumber plants.”
The same questions in other papers
nickel atom · yield · Cucumis sativus (cucumber)Results differ
2 papers in the same direction as this paper · 1 in the opposite direction
- no effect
- positive
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nickel atom · nutrient: content · Cucumis sativus (cucumber)Positive and negative results
2 papers in the same direction as this paper · 1 in the opposite direction
- positive
- negative
- no effect
nitrogen · quality: sugar starch · Cucumis sativus (cucumber)Positive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- negative
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nitrogen · nutrient: content · Cucumis sativus (cucumber)Positive and negative results
9 papers in the same direction as this paper · 7 in the opposite direction
- negative
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- negative
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.