Abstract

Co-inoculation of plant growth promoting rhizobacteria (PGPR) with Bradyrhizobium has been shown to increase legume nodulation and nitrogen fixation at optimal soil temperatures. Nine rhizobacteria co-inoculated with Bradyrhizobium japonicum 532C were tested for their ability to reduce the negative effects of low root zone temperature (RZT) on soybean [ Glycine max (L.) Merr.] nodulation and nitrogen fixation. Three RZTs were tested: 25 (optimal), 17.5 (somewhat inhibitory), and 15°C (very inhibitory). At each temperature some PGPR strains increased the number of nodules formed and the amount of fixed nitrogen when co-inoculated with B. japonicum, but the stimulatory strains varied with temperatures. The strains that were most stimulatory varied among temperatures and were as follows: 15°C, Serratia proteamaculans 1-102; 17.5° C, S. proteamaculans 1-102 and Aeromonas hydrophila P73; 25°C, Serratia liquefaciens 2-68.

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Claims 6

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Some coinoculated PGPR strains increased nodule number at each temperature.

Taxon
SoybeanGlycine maxt0
Treatment
co-inoculated with B. japonicume0
Interactor
B. japonicumBradyrhizobium japonicume0symbiont
Outcome
number of nodules formede0
Direction
increasede0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Glycine max
Glycine max · TaxonPublic domain · Wikimedia Commons ↗
Bradyrhizobium japonicum
Bradyrhizobium japonicum · InteractorLouisa Howard - Dartmouth Electron Microscope Facility · Public domain · Wikimedia Commons ↗

Verbatim

e0

“At each temperature some PGPR strains increased the number of nodules formed and the amount of fixed nitrogen when co-inoculated with B. japonicum, but the stimulatory strains varied with temperatures.”

✓ located verbatim in the source · abstract, characters 508–709 · show in text ↑
t0

“Plant Growth Promoting Rhizobacteria and Soybean [Glycine max(L.) Merr.] Nodulation and Nitrogen Fixation at Suboptimal Root Zone Temperatures”

✓ located verbatim in the source · title, characters 0–142 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Some coinoculated PGPR strains increased fixed nitrogen at each temperature.

Taxon
SoybeanGlycine maxt0
Treatment
co-inoculated with B. japonicume0
Interactor
B. japonicumBradyrhizobium japonicume0symbiont
Outcome
amount of fixed nitrogene0
Direction
increasede0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Glycine max
Glycine max · TaxonPublic domain · Wikimedia Commons ↗
Bradyrhizobium japonicum
Bradyrhizobium japonicum · InteractorLouisa Howard - Dartmouth Electron Microscope Facility · Public domain · Wikimedia Commons ↗

Verbatim

e0

“At each temperature some PGPR strains increased the number of nodules formed and the amount of fixed nitrogen when co-inoculated with B. japonicum, but the stimulatory strains varied with temperatures.”

✓ located verbatim in the source · abstract, characters 508–709 · show in text ↑
t0

“Plant Growth Promoting Rhizobacteria and Soybean [Glycine max(L.) Merr.] Nodulation and Nitrogen Fixation at Suboptimal Root Zone Temperatures”

✓ located verbatim in the source · title, characters 0–142 · show in text ↑
Observationobservedoriginal resultpositivemeasured

Claim · model-written summary

Serratia proteamaculans 1-102 was most stimulatory at 15°C.

Taxon
SoybeanGlycine maxt0
Interactor
Serratia proteamaculans 1-102Serratia proteamaculanse0symbiont
Outcome
most stimulatorye0
Direction
most stimulatorye0
Setting
15°Ce0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Glycine max
Glycine max · TaxonPublic domain · Wikimedia Commons ↗

Verbatim

e0

“The strains that were most stimulatory varied among temperatures and were as follows: 15°C, Serratia proteamaculans 1-102; 17.5° C, S. proteamaculans 1-102 and Aeromonas hydrophila P73; 25°C, Serratia liquefaciens 2-68.”

✓ located verbatim in the source · abstract, characters 710–929 · show in text ↑
t0

“Plant Growth Promoting Rhizobacteria and Soybean [Glycine max(L.) Merr.] Nodulation and Nitrogen Fixation at Suboptimal Root Zone Temperatures”

✓ located verbatim in the source · title, characters 0–142 · show in text ↑
Observationobservedoriginal resultpositivemeasured

Claim · model-written summary

S. proteamaculans 1-102 was most stimulatory at 17.5° C.

Taxon
SoybeanGlycine maxt0
Interactor
S. proteamaculans 1-102Serratia proteamaculanse0symbiont
Outcome
most stimulatorye0
Direction
most stimulatorye0
Setting
17.5° Ce0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Glycine max
Glycine max · TaxonPublic domain · Wikimedia Commons ↗

Verbatim

e0

“The strains that were most stimulatory varied among temperatures and were as follows: 15°C, Serratia proteamaculans 1-102; 17.5° C, S. proteamaculans 1-102 and Aeromonas hydrophila P73; 25°C, Serratia liquefaciens 2-68.”

✓ located verbatim in the source · abstract, characters 710–929 · show in text ↑
t0

“Plant Growth Promoting Rhizobacteria and Soybean [Glycine max(L.) Merr.] Nodulation and Nitrogen Fixation at Suboptimal Root Zone Temperatures”

✓ located verbatim in the source · title, characters 0–142 · show in text ↑
Observationobservedoriginal resultpositivemeasured

Claim · model-written summary

Aeromonas hydrophila P73 was most stimulatory at 17.5° C.

Taxon
SoybeanGlycine maxt0
Interactor
Aeromonas hydrophila P73Aeromonas hydrophilae0symbiont
Outcome
most stimulatorye0
Direction
most stimulatorye0
Setting
17.5° Ce0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Glycine max
Glycine max · TaxonPublic domain · Wikimedia Commons ↗
Aeromonas hydrophila
Aeromonas hydrophila · InteractorCDC/ Dr. W.A. Clark · Public domain · Wikimedia Commons ↗

Verbatim

e0

“The strains that were most stimulatory varied among temperatures and were as follows: 15°C, Serratia proteamaculans 1-102; 17.5° C, S. proteamaculans 1-102 and Aeromonas hydrophila P73; 25°C, Serratia liquefaciens 2-68.”

✓ located verbatim in the source · abstract, characters 710–929 · show in text ↑
t0

“Plant Growth Promoting Rhizobacteria and Soybean [Glycine max(L.) Merr.] Nodulation and Nitrogen Fixation at Suboptimal Root Zone Temperatures”

✓ located verbatim in the source · title, characters 0–142 · show in text ↑
Observationobservedoriginal resultpositivemeasured

Claim · model-written summary

Serratia liquefaciens 2-68 was most stimulatory at 25°C.

Taxon
SoybeanGlycine maxt0
Interactor
Serratia liquefaciens 2-68Serratia liquefaciense0symbiont
Outcome
most stimulatorye0
Direction
most stimulatorye0
Setting
25°Ce0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Glycine max
Glycine max · TaxonPublic domain · Wikimedia Commons ↗

Verbatim

e0

“The strains that were most stimulatory varied among temperatures and were as follows: 15°C, Serratia proteamaculans 1-102; 17.5° C, S. proteamaculans 1-102 and Aeromonas hydrophila P73; 25°C, Serratia liquefaciens 2-68.”

✓ located verbatim in the source · abstract, characters 710–929 · show in text ↑
t0

“Plant Growth Promoting Rhizobacteria and Soybean [Glycine max(L.) Merr.] Nodulation and Nitrogen Fixation at Suboptimal Root Zone Temperatures”

✓ located verbatim in the source · title, characters 0–142 · show in text ↑

Bradyrhizobium japonicum · symbiosis · Glycine max (soybean)Positive and negative results

50 papers: 46 positive, 4 negative or no effect

45 papers in the same direction as this paper · 3 in the opposite direction · 1 reporting no difference from an alternative

  1. positive
  2. positive
  3. positive

46 papers more in this group

See all 50 papers →

inoculation · symbiosis · Glycine max (soybean)Positive and negative results

310 papers: 265 positive, 45 negative or no effect

264 papers in the same direction as this paper · 43 in the opposite direction · 2 reporting no difference from an alternative

  1. positive
  2. positive
  3. positive

306 papers more in this group

See all 310 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.