Abstract
Abstract Soybean plants [Glycine max (L.) Merr.] were grown in pots and inoculated with Rhizobium japonicum and/or Glomus mosseae (Nicol. & Gerd.) Gerd. & Trappe, either at planting or 20 days later. Nitrogen was supplied in the nutrient solution to plants without nitrogen‐fixing bacteria, and P was added to those without the mycorrhizal fungus. At harvest, 50 days after planting, all plants had leaves of similar dry mass. Each root symbiont grew best in the absence of the other. Growth of Glomus reflected the duration of its growing time and the presence and duration of competition from Rhizobium. Nodule weight in the tripartite associations, on the other hand, was inhibited only by the earlier introduction of Glomus. Dipartite associations and the plants inoculated with both root symbionts at planting had the highest concentration of leaf N, and the lowest was in those inoculated with both organisms at d 20. Leaf P was highest in plants inoculated only with Rhizobium, and lowest in those tripartite associations involving any inoculation at day 20. The low values were presumably a result of the short duration of endophyte‐mediated P uptake before the plants were harvested. Although there was almost no difference in leaf sugar concentrations, starch concentrations reflected the duration of Glomus growth, and were greatest in those plants that had supported it for the least time. Uninoculated plants contained the least starch, but produced a greater fresh mass of leaf tissue than any of the tripartite symbionts. Key words: MycorrhizaNitrogen fixationPlant symbiosisSoybean
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Claims 12
Claim · model-written summary
All soybean treatments had similar leaf dry mass at harvest.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At harvest, 50 days after planting, all plants had leaves of similar dry mass.”
t0“glycine”
Claim · model-written summary
Each soybean root symbiont grew best without the other.
- Taxon
- Soybean
Glycine maxe2 - Interactor
- Rhizobium japonicume1symbiont
- Second interactor
- Glomus mosseae
Funneliformis mosseaee1symbiont - Outcome
- root symbiont grew beste0
- Direction
- beste0
- Comparator
- absence of the othere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Each root symbiont grew best in the absence of the other.”
e1“Rhizobium japonicum and/or Glomus mosseae”
e2“Soybean plants”
Claim · model-written summary
Glomus growth reflected its duration and competition from Rhizobium.
- Taxon
- SoybeanGlycine maxe1
- Outcome
- Growth of Glomuse0
- Qualifier
- duration of its growing time and the presence and duration of competition from Rhizobiume0
Glomus
RhizobiumNot reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Growth of Glomus reflected the duration of its growing time and the presence and duration of competition from Rhizobium.”
e1“Soybean plants”
Claim · model-written summary
Earlier introduction of Glomus inhibited nodule weight in tripartite soybean associations.
- Taxon
- SoybeanGlycine maxe1
- Treatment
- earlier introduction of Glomuse0
- Outcome
- Nodule weighte0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nodule weight in the tripartite associations, on the other hand, was inhibited only by the earlier introduction of Glomus.”
e1“Soybean plants”
Claim · model-written summary
Dipartite associations and soybean inoculated with both symbionts at planting had the highest leaf N concentration.
- Taxon
- SoybeanGlycine maxe1
- Treatment
- both root symbionts at plantinge0
- Outcome
- concentration of leaf Ne0
- Direction
- higheste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Dipartite associations and the plants inoculated with both root symbionts at planting had the highest concentration of leaf N”
e1“Soybean plants”
Claim · model-written summary
Soybean inoculated with both organisms at day 20 had the lowest leaf N concentration.
- Taxon
- SoybeanGlycine maxe2
- Treatment
- inoculated with both organisms at d 20e0
- Outcome
- concentration of leaf Ne1
- Direction
- loweste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the lowest was in those inoculated with both organisms at d 20.”
e1“concentration of leaf N”
e2“Soybean plants”
Claim · model-written summary
Leaf P was highest in soybean inoculated only with Rhizobium.
- Taxon
- SoybeanGlycine maxe1
- Treatment
- inoculated only with Rhizobiume0
- Outcome
- Leaf Pe0
- Direction
- higheste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leaf P was highest in plants inoculated only with Rhizobium”
e1“Soybean plants”
Claim · model-written summary
Leaf P was lowest in tripartite soybean associations with inoculation at day 20.
- Taxon
- SoybeanGlycine maxe2
- Treatment
- any inoculation at day 20e0
- Outcome
- Leaf Pe1
- Direction
- loweste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“lowest in those tripartite associations involving any inoculation at day 20.”
e1“Leaf P”
e2“Soybean plants”
Claim · model-written summary
Leaf sugar concentrations differed little across soybean treatments.
- Taxon
- SoybeanGlycine maxe1
- Outcome
- leaf sugar concentrationse0
- Direction
- almost no differencee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there was almost no difference in leaf sugar concentrations”
e1“Soybean plants”
Claim · model-written summary
Soybean leaf starch concentrations were greatest after the shortest Glomus growth.
- Taxon
- SoybeanGlycine maxe1
- Outcome
- starch concentrationse0
- Direction
- greateste0
- Qualifier
- least timee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“starch concentrations reflected the duration of Glomus growth, and were greatest in those plants that had supported it for the least time.”
e1“Soybean plants”
Claim · model-written summary
Uninoculated soybean plants contained the least starch.
- Taxon
- SoybeanGlycine maxe1
- Treatment
- Uninoculatede0
- Outcome
- starche0
- Direction
- leaste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Uninoculated plants contained the least starch”
e1“Soybean plants”
Claim · model-written summary
Uninoculated soybean plants produced more fresh leaf mass than tripartite symbionts.
- Taxon
- SoybeanGlycine maxe2
- Treatment
- Uninoculatede1
- Outcome
- fresh mass of leaf tissuee0
- Direction
- greatere0
- Comparator
- tripartite symbiontse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“produced a greater fresh mass of leaf tissue than any of the tripartite symbionts.”
e1“Uninoculated plants”
e2“Soybean plants”
The same questions in other papers
Glomus · symbiosis · Glycine max (soybean)Positive and negative results
3 in the opposite direction
- positive
- positive
- 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.