Abstract
Previous researchers found that formation and function of nitrogen-fixing nodules on legume roots were severely inhibited by addition of exogenous ethylene. Nodule formation by Rhizobium meliloti on Medicago sativa was stimulated twofold when the ethylene biosynthesis inhibitor aminoethoxyvinylglycine (AVG) was added with the inoculum. Stimulation of nodule formation by AVG showed a similar concentration dependence as inhibition of ethylene biosynthesis, suggesting that the primary action of AVG is the inhibition of ethylene biosynthesis. When AVG was added 2 to 3 days after inoculation, the number of nodules formed was still increased. On a per plant basis, however, the average nitrogen fixation was unchanged by AVG treatment and was independent of nodule number.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. 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 6
Claim · model-written summary
Adding the ethylene biosynthesis inhibitor AVG with the inoculum stimulated nodule formation by Rhizobium meliloti on Medicago sativa twofold.
- Taxon
- Medicago sativa
Medicago sativae0 - Treatment
- aminoethoxyvinylglycine (AVG)e0
- Interactor
- Rhizobium meliloti
Sinorhizobium melilotie0symbiont - Outcome
- Nodule formatione0
- Direction
- stimulatede0
- Value
- twofolde0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nodule formation by Rhizobium meliloti on Medicago sativa was stimulated twofold when the ethylene biosynthesis inhibitor aminoethoxyvinylglycine (AVG) was added with the inoculum”
Claim · model-written summary
The stimulation of nodule formation by AVG showed a similar concentration dependence to the inhibition of ethylene biosynthesis.
- Taxon
- Medicago sativaMedicago sativae7
- Treatment
- AVGe1
- Outcome
- nodule formatione1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Stimulation of nodule formation by AVG showed a similar concentration dependence as inhibition of ethylene biosynthesis”
e7“Medicago sativa”
Claim · model-written summary
The authors suggest that the primary action of AVG is inhibition of ethylene biosynthesis.
- Taxon
- Medicago sativaMedicago sativae7
- Treatment
- AVGe2
- Outcome
- primary action of AVGe2
- Qualifier
- inhibition of ethylene biosynthesise2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“suggesting that the primary action of AVG is the inhibition of ethylene biosynthesis”
e7“Medicago sativa”
Claim · model-written summary
AVG added 2 to 3 days after inoculation still increased the number of nodules formed.
- Taxon
- Medicago sativaMedicago sativae7
- Treatment
- AVG was added 2 to 3 days after inoculatione3
- Outcome
- number of nodules formede3
- Direction
- increasede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“When AVG was added 2 to 3 days after inoculation, the number of nodules formed was still increased”
e7“Medicago sativa”
Claim · model-written summary
Per plant, the average nitrogen fixation was unchanged by AVG treatment.
- Taxon
- Medicago sativaMedicago sativae7
- Treatment
- AVG treatmente4
- Outcome
- average nitrogen fixatione4
- Direction
- unchangede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“On a per plant basis, however, the average nitrogen fixation was unchanged by AVG treatment”
e7“Medicago sativa”
Claim · model-written summary
Nitrogen fixation per plant was independent of nodule number.
- Taxon
- Medicago sativaMedicago sativae7
- Organ / stage
- nodulee5
- Direction
- independente5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“On a per plant basis, however, the average nitrogen fixation was unchanged by AVG treatment”
e5“was independent of nodule number”
e7“Medicago sativa”
The same questions in other papers
inoculation · symbiosis · Medicago sativa (alfalfa)Positive and negative results
48 papers in the same direction as this paper · 7 in the opposite direction · 1 reporting no difference from an alternative
- positive
- negative
- negative
53 papers more in this group
See all 57 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.