Abstract
An approximate doubling in plant growth, total plant nitrogen, nodulation, and overall dinitrogen fixation of alfalfa are the consequences of the action of a toxin delivered by a Pseudomonas infesting the alfalfa rhizosphere. The toxin, tabtoxinine-beta-lactam, inactivates selectively one form of glutamine synthetase in the nodules. Thus, normal glutamine synthetase-catalyzed ammonia assimilation is significantly impaired; yet these plants assimilated about twice the normal amount of nitrogen. How plants regulate dinitrogen fixing symbiotic associations is an important and unresolved question; the current results imply that the glutamine synthetase-catalyzed step in ammonia assimilation, a plant function, strongly influences overall dinitrogen fixation in legumes.
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Claims 5
Claim · model-written summary
A toxin delivered by a Pseudomonas in the alfalfa rhizosphere approximately doubled plant growth, total plant nitrogen and nodulation of alfalfa.
- Taxon
- alfalfa
Medicago sativae1 - Treatment
- a toxin delivered by a Pseudomonas infesting the alfalfa rhizospheree1
- Interactor
- Pseudomonas
Pseudomonase1pathogen - Outcome
- plant growth, total plant nitrogen, nodulatione1
- Direction
- increaseinferrede1
- Value
- approximate doublinge1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“An approximate doubling in plant growth, total plant nitrogen, nodulation, and overall dinitrogen fixation of alfalfa are the consequences of the action of a toxin delivered by a Pseudomonas infesting the alfalfa rhizosphere”
Claim · model-written summary
A toxin delivered by a Pseudomonas in the alfalfa rhizosphere approximately doubled overall dinitrogen fixation of alfalfa.
- Taxon
- alfalfaMedicago sativae1
- Treatment
- a toxin delivered by a Pseudomonas infesting the alfalfa rhizospheree1
- Interactor
- PseudomonasPseudomonase1pathogen
- Outcome
- overall dinitrogen fixatione1
- Direction
- increaseinferrede1
- Value
- approximate doublinge1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“An approximate doubling in plant growth, total plant nitrogen, nodulation, and overall dinitrogen fixation of alfalfa are the consequences of the action of a toxin delivered by a Pseudomonas infesting the alfalfa rhizosphere”
Claim · model-written summary
The toxin tabtoxinine-beta-lactam selectively inactivates one form of glutamine synthetase in the nodules of alfalfa.
- Taxon
- alfalfaMedicago sativae1
- Organ / stage
- nodulese2
- Gene
- glutamine synthetasee2
- Compound
- tabtoxinine-beta-lactame2
- Outcome
- one form of glutamine synthetasee2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“An approximate doubling in plant growth, total plant nitrogen, nodulation, and overall dinitrogen fixation of alfalfa are the consequences of the action of a toxin delivered by a Pseudomonas infesting the alfalfa rhizosphere”
e2“The toxin, tabtoxinine-beta-lactam, inactivates selectively one form of glutamine synthetase in the nodules”
Claim · model-written summary
The toxin decreased normal glutamine synthetase-catalyzed ammonia assimilation in alfalfa significantly.
- Taxon
- alfalfaMedicago sativae1
- Treatment
- toxine1
- Outcome
- glutamine synthetase-catalyzed ammonia assimilatione3
- Direction
- decreaseinferrede3
- Comparator
- normale3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“An approximate doubling in plant growth, total plant nitrogen, nodulation, and overall dinitrogen fixation of alfalfa are the consequences of the action of a toxin delivered by a Pseudomonas infesting the alfalfa rhizosphere”
e3“Thus, normal glutamine synthetase-catalyzed ammonia assimilation is significantly impaired”
Claim · model-written summary
The glutamine synthetase-catalyzed step in ammonia assimilation is suggested to strongly influence overall dinitrogen fixation in alfalfa and legumes.
- Taxon
- alfalfaMedicago sativae1
- Gene
- glutamine synthetasee4
- Outcome
- overall dinitrogen fixatione4
- Qualifier
- the current results implye4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“An approximate doubling in plant growth, total plant nitrogen, nodulation, and overall dinitrogen fixation of alfalfa are the consequences of the action of a toxin delivered by a Pseudomonas infesting the alfalfa rhizosphere”
e4“the current results imply that the glutamine synthetase-catalyzed step in ammonia assimilation, a plant function, strongly influences overall dinitrogen fixation in legumes”
The same questions in other papers
Pseudomonas · molecular: metabolites · Medicago sativa (alfalfa)Results agree
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- positive
- positive
Pseudomonas · symbiosis · Medicago sativa (alfalfa)Results agree
3 papers in the same direction as this paper
- positive
- positive
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infection · symbiosis · Medicago sativa (alfalfa)Positive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- negative
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infection · molecular: metabolites · Medicago sativa (alfalfa)Positive and negative results
2 papers in the same direction as this paper · 3 in the opposite direction
- negative
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2 papers more in this group
See all 6 papers →pathogen product · symbiosis · Medicago sativa (alfalfa)Results agree
1 paper in the same direction as this paper
- positive
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.