Abstract
Nitrate (20 mM) applied to the root medium of 28-day-old nodulated pea plants (Pisum sativum L., cv. Jupiter) immediately retarded nodule growth and inhibited root nodulation. Acetylene-reducing and H2-evolving nitrogenase activities were also significantly inhibited. The inhibitory effect of nitrate on nodule respiration was less pronounced while the respiration of roots was increased after the addition of nitrate. The levels of cytosol glutamine synthetase and nitrate reductase in nodule cytosol were permanently decreased from the 4th day after nitrate application. These results indicate that the inhibitory effect of high nitrate concentration on whole nodule metabolism is nonspecific in nature.
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Claims 7
Claim · model-written summary
Nitrate applied to the root medium retarded nodule growth in pea.
- Taxon
- Pisum sativum L.
Lathyrus oleraceuse1 - Material
- cv. Jupitere1
- Treatment
- Nitrate (20 mM) applied to the root mediume1
- Outcome
- nodule growthe1
- Direction
- retardede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Nitrate (20 mM) applied to the root medium of 28-day-old nodulated pea plants (Pisum sativum L., cv. Jupiter) immediately retarded nodule growth and inhibited root nodulation”
Claim · model-written summary
Nitrate inhibited root nodulation in pea.
- Taxon
- Pisum sativum L.Lathyrus oleraceuse1
- Material
- cv. Jupitere1
- Treatment
- Nitrate (20 mM) applied to the root mediume1
- Outcome
- root nodulatione1
- Direction
- inhibitede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Nitrate (20 mM) applied to the root medium of 28-day-old nodulated pea plants (Pisum sativum L., cv. Jupiter) immediately retarded nodule growth and inhibited root nodulation”
Claim · model-written summary
Nitrate significantly inhibited acetylene-reducing and H2-evolving nitrogenase activities in pea nodules.
- Taxon
- Pisum sativum L.Lathyrus oleraceuse1
- Treatment
- Nitrate (20 mM) applied to the root mediume1
- Outcome
- Acetylene-reducing and H2-evolving nitrogenase activitiese2
- Direction
- inhibitede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Nitrate (20 mM) applied to the root medium of 28-day-old nodulated pea plants (Pisum sativum L., cv. Jupiter) immediately retarded nodule growth and inhibited root nodulation”
e2“Acetylene-reducing and H2-evolving nitrogenase activities were also significantly inhibited”
Claim · model-written summary
The inhibitory effect of nitrate on nodule respiration was less pronounced than on nodule growth and nitrogenase.
- Taxon
- Pisum sativum L.Lathyrus oleraceuse1
- Treatment
- nitratee3
- Outcome
- nodule respiratione3
- Direction
- less pronouncede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Nitrate (20 mM) applied to the root medium of 28-day-old nodulated pea plants (Pisum sativum L., cv. Jupiter) immediately retarded nodule growth and inhibited root nodulation”
e3“The inhibitory effect of nitrate on nodule respiration was less pronounced while the respiration of roots was increased after the addition of nitrate”
Claim · model-written summary
Root respiration increased after nitrate addition in pea.
- Taxon
- Pisum sativum L.Lathyrus oleraceuse1
- Treatment
- addition of nitratee3
- Outcome
- respiration of rootse3
- Direction
- increasede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Nitrate (20 mM) applied to the root medium of 28-day-old nodulated pea plants (Pisum sativum L., cv. Jupiter) immediately retarded nodule growth and inhibited root nodulation”
e3“The inhibitory effect of nitrate on nodule respiration was less pronounced while the respiration of roots was increased after the addition of nitrate”
Claim · model-written summary
Cytosol glutamine synthetase and nitrate reductase levels in nodules were permanently decreased from the 4th day after nitrate application.
- Taxon
- Pisum sativum L.Lathyrus oleraceuse1
- Treatment
- nitratee4
- Outcome
- levels of cytosol glutamine synthetase and nitrate reductase in nodule cytosole4
- Direction
- permanently decreasede4
- Qualifier
- from the 4th day after nitrate applicatione4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Nitrate (20 mM) applied to the root medium of 28-day-old nodulated pea plants (Pisum sativum L., cv. Jupiter) immediately retarded nodule growth and inhibited root nodulation”
e4“The levels of cytosol glutamine synthetase and nitrate reductase in nodule cytosol were permanently decreased from the 4th day after nitrate application”
Claim · model-written summary
The inhibitory effect of high nitrate on whole nodule metabolism is nonspecific in nature.
- Taxon
- Pisum sativum L.Lathyrus oleraceuse1
- Treatment
- high nitrate concentratione5
- Outcome
- whole nodule metabolisme5
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Nitrate (20 mM) applied to the root medium of 28-day-old nodulated pea plants (Pisum sativum L., cv. Jupiter) immediately retarded nodule growth and inhibited root nodulation”
e5“These results indicate that the inhibitory effect of high nitrate concentration on whole nodule metabolism is nonspecific in nature”
The same questions in other papers
nitrogen · symbiosis · Lathyrus oleraceus (pea)Results differ
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- no effect
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- positive
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See all 7 papers →in vitro · physiology: enzyme activity · Lathyrus oleraceus (pea)Results agree
3 papers in the same direction as this paper
- negative
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- negative
in vitro · symbiosis · Lathyrus oleraceus (pea)Results agree
4 papers in the same direction as this paper
- negative
- negative
- negative
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See all 5 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.