Abstract
The excessive use of nickel (Ni) in manufacturing and various industries has made Ni a serious pollutant in the past few decades. As a micronutrient, Ni is crucial for plant growth at low concentrations, but at higher concentrations, it can hamper growth. We evaluated the effects of Ni concentrations on nitrate (NO3−) and ammonium (NH4+) concentrations, and nitrogen metabolism enzyme activity in rice seedlings grown in hydroponic systems, using different Ni concentrations. A Ni concentration of 200 μM significantly decreased the NO3− concentration in rice leaves, as well as the activities of nitrate reductase (NR), nitrite reductase (NiR), glutamine synthetase (GS), and glutamate synthetase (GOGAT), respectively, when compared to the control. By contrast, the NH4+ concentration and glutamate dehydrogenase (GDH) activity both increased markedly by 48% and 46%, respectively, compared with the control. Furthermore, the activity of most active aminotransferases, including glutamic pyruvic transaminase (GPT) and glutamic oxaloacetic transaminase (GOT), was inhibited by 48% and 36%, respectively, in comparison with the control. The results indicate that Ni toxicity causes the enzymes involved in N assimilation to desynchronize, ultimately negatively impacting the overall plant growth.
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Claims 8
Claim · model-written summary
At 200 μM nickel, leaf nitrate concentration decreased relative to control.
- Taxon
- rice
Oryza sativae0 - Organ / stage
- leavese0
- Treatment
- Ni concentration of 200 μMe0
- Outcome
- NO3− concentratione0
- Direction
- decreasede0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A Ni concentration of 200 μM significantly decreased the NO3− concentration in rice leaves, as well as the activities of nitrate reductase (NR), nitrite reductase (NiR), glutamine synthetase (GS), and glutamate synthetase (GOGAT), respectively, when compared to the control”
Claim · model-written summary
At 200 μM nickel, activities of NR, NiR and GS decreased relative to control.
- Taxon
- riceOryza sativae0
- Treatment
- Ni concentration of 200 μMe0
- Outcome
- activities of nitrate reductase (NR), nitrite reductase (NiR), glutamine synthetase (GS)e0
- Direction
- decreasede0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A Ni concentration of 200 μM significantly decreased the NO3− concentration in rice leaves, as well as the activities of nitrate reductase (NR), nitrite reductase (NiR), glutamine synthetase (GS), and glutamate synthetase (GOGAT), respectively, when compared to the control”
Claim · model-written summary
At 200 μM nickel, GOGAT activity decreased relative to control.
- Taxon
- riceOryza sativae0
- Treatment
- Ni concentration of 200 μMe0
- Outcome
- glutamate synthetase (GOGAT)e0
- Direction
- decreasede0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A Ni concentration of 200 μM significantly decreased the NO3− concentration in rice leaves, as well as the activities of nitrate reductase (NR), nitrite reductase (NiR), glutamine synthetase (GS), and glutamate synthetase (GOGAT), respectively, when compared to the control”
Claim · model-written summary
Nickel increased ammonium concentration by 48%.
- Taxon
- RiceOryza sativat0
- Treatment
- Nickelt0
- Outcome
- NH4+ concentratione0
- Direction
- increasede0
- Value
- 48%e0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the NH4+ concentration and glutamate dehydrogenase (GDH) activity both increased markedly by 48% and 46%, respectively, compared with the control”
t0“Nickel Toxicity Interferes with NO3−/NH4+ Uptake and Nitrogen Metabolic Enzyme Activity in Rice”
Claim · model-written summary
Nickel increased GDH activity by 46%.
- Taxon
- RiceOryza sativat0
- Treatment
- Nickelt0
- Outcome
- glutamate dehydrogenase (GDH) activitye0
- Direction
- increasede0
- Value
- 46%e0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the NH4+ concentration and glutamate dehydrogenase (GDH) activity both increased markedly by 48% and 46%, respectively, compared with the control”
t0“Nickel Toxicity Interferes with NO3−/NH4+ Uptake and Nitrogen Metabolic Enzyme Activity in Rice”
Claim · model-written summary
Nickel inhibited GPT activity by 48%.
- Taxon
- RiceOryza sativat0
- Treatment
- Nickelt0
- Outcome
- glutamic pyruvic transaminase (GPT)e0
- Direction
- inhibitede0
- Value
- 48%e0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“glutamic pyruvic transaminase (GPT) and glutamic oxaloacetic transaminase (GOT), was inhibited by 48% and 36%, respectively, in comparison with the control”
t0“Nickel Toxicity Interferes with NO3−/NH4+ Uptake and Nitrogen Metabolic Enzyme Activity in Rice”
Claim · model-written summary
Nickel inhibited GOT activity by 36%.
- Taxon
- RiceOryza sativat0
- Treatment
- Nickelt0
- Outcome
- glutamic oxaloacetic transaminase (GOT)e0
- Direction
- inhibitede0
- Value
- 36%e0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“glutamic pyruvic transaminase (GPT) and glutamic oxaloacetic transaminase (GOT), was inhibited by 48% and 36%, respectively, in comparison with the control”
t0“Nickel Toxicity Interferes with NO3−/NH4+ Uptake and Nitrogen Metabolic Enzyme Activity in Rice”
Claim · model-written summary
Authors conclude nickel toxicity desynchronizes nitrogen-assimilation enzymes and harms growth.
- Taxon
- RiceOryza sativat0
- Treatment
- Ni toxicitye0
- Outcome
- plant growthe0
- Direction
- negatively impactinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ni toxicity causes the enzymes involved in N assimilation to desynchronize, ultimately negatively impacting the overall plant growth”
t0“Rice”
The same questions in other papers
nickel atom · molecular: metabolites · Oryza sativa (rice)Positive and negative results
3 papers in the same direction as this paper · 3 in the opposite direction
- positive
- positive
- positive
3 papers more in this group
See all 7 papers →nickel atom · physiology: enzyme activity · Oryza sativa (rice)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.