Paper · 2004 · Soils and fertilizers

Chemotaxis of pseudomonas fluorescens RB-42 RB-89 towards roots exudates and colonization of tabacco roots

Gu Jingang; Caas Beijing

10
claims
18
verbatim quotes
0
citations
1
research areas
—
Not open access

Abstract

Tabocco PGPR strains Pseudomonas fluorescens RB-89 and RB-42 had high dgree chemotaxis towards roots exudates.The Che are 1.79 and 1.93 of P. fluorescens RB-89 and RB-42 at five hundreds times dilution of the condense of tobacco roots exudates . The two strains had higher chemotaxis towards amino acid than organic acid and the carbohydrates. The chemotaxis of P. fluorescens RB-89 and RB-42 showed great difference among amino acids, the strains had a high chemotaxis toward Tyr Pro Gly Phe but showed no chemotaxis toward His and Thr. The strains showed almost no different chemotaxis to organic acid but showed higher chemotaxis to lactic acid than ohters. The strains showed no chemotaxis toward the carbohydrates. The colonization on tabacco roots of P. fluorescens RB-89 and RB-42 were deeply influenced by soil sterilization and chemotaxic materials and the colonization density were improved greatly with soil sterilization and chemotaxic materials.

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Claims 10

Observationobservedoriginal resultpositivemeasured

Claim · model-written summary

RB-89 had a chemotaxis value of 1.79 toward diluted tobacco root exudates.

Interactor
P. fluorescens RB-89Pseudomonas fluorescense0symbiont
Outcome
Chee0
Value
1.79e0
Qualifier
five hundreds times dilutione0

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

Nicotiana tabacum
Nicotiana tabacum · TaxonJom / Joachim Müllerchen · CC BY 2.5 · Wikimedia Commons ↗
Pseudomonas fluorescens
Pseudomonas fluorescens · InteractorNinjatacoshell · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“The Che are 1.79 and 1.93 of P. fluorescens RB-89 and RB-42 at five hundreds times dilution of the condense of tobacco roots exudates”

✓ located verbatim in the source · abstract, characters 110–243 · show in text ↑
Observationobservedoriginal resultpositivemeasured

Claim · model-written summary

RB-42 had a chemotaxis value of 1.93 toward diluted tobacco root exudates.

Interactor
RB-42e0symbiont
Outcome
Chee0
Value
1.93e0
Qualifier
five hundreds times dilutione0

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

Nicotiana tabacum
Nicotiana tabacum · TaxonJom / Joachim Müllerchen · CC BY 2.5 · Wikimedia Commons ↗

Verbatim

e0

“The Che are 1.79 and 1.93 of P. fluorescens RB-89 and RB-42 at five hundreds times dilution of the condense of tobacco roots exudates”

✓ located verbatim in the source · abstract, characters 110–243 · show in text ↑
Observationobservedoriginal resultpositivemeasured

Claim · model-written summary

The strains showed greater chemotaxis toward amino acids than toward organic acids or carbohydrates.

Interactor
two strainse0symbiont
Outcome
chemotaxise0
Direction
highere0
Comparator
organic acid and the carbohydratese0

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

Nicotiana tabacum
Nicotiana tabacum · TaxonJom / Joachim Müllerchen · CC BY 2.5 · Wikimedia Commons ↗

Verbatim

e0

“The two strains had higher chemotaxis towards amino acid than organic acid and the carbohydrates”

✓ located verbatim in the source · abstract, characters 246–342 · show in text ↑
e1

“The Che are 1.79 and 1.93 of P. fluorescens RB-89 and RB-42 at five hundreds times dilution of the condense of tobacco roots exudates”

✓ located verbatim in the source · abstract, characters 110–243 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

Both strains showed high chemotaxis toward Tyr, Pro, Gly and Phe.

Interactor
strainse0symbiont
Outcome
chemotaxis toward Tyr Pro Gly Phee0
Direction
highe0

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

Nicotiana tabacum
Nicotiana tabacum · TaxonJom / Joachim Müllerchen · CC BY 2.5 · Wikimedia Commons ↗

Verbatim

e0

“the strains had a high chemotaxis toward Tyr Pro Gly Phe”

✓ located verbatim in the source · abstract, characters 436–492 · show in text ↑
e1

“The Che are 1.79 and 1.93 of P. fluorescens RB-89 and RB-42 at five hundreds times dilution of the condense of tobacco roots exudates”

✓ located verbatim in the source · abstract, characters 110–243 · show in text ↑
Observationobservedoriginal resultno effectmeasured

Claim · model-written summary

The strains showed no chemotaxis toward His and Thr.

Outcome
chemotaxis toward His and Thre0
Direction
no chemotaxise0
Interactor role
symbionte0

Not reportedInteractor

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

Nicotiana tabacum
Nicotiana tabacum · TaxonJom / Joachim Müllerchen · CC BY 2.5 · Wikimedia Commons ↗

Verbatim

e0

“showed no chemotaxis toward His and Thr”

✓ located verbatim in the source · abstract, characters 497–536 · show in text ↑
e1

“The Che are 1.79 and 1.93 of P. fluorescens RB-89 and RB-42 at five hundreds times dilution of the condense of tobacco roots exudates”

✓ located verbatim in the source · abstract, characters 110–243 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

The strains showed similar chemotaxis across organic acids.

Interactor
strainse0symbiont
Outcome
chemotaxis to organic acide0
Direction
almost no differente0

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

Nicotiana tabacum
Nicotiana tabacum · TaxonJom / Joachim Müllerchen · CC BY 2.5 · Wikimedia Commons ↗

Verbatim

e0

“The strains showed almost no different chemotaxis to organic acid”

✓ located verbatim in the source · abstract, characters 538–603 · show in text ↑
e1

“The Che are 1.79 and 1.93 of P. fluorescens RB-89 and RB-42 at five hundreds times dilution of the condense of tobacco roots exudates”

✓ located verbatim in the source · abstract, characters 110–243 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

Chemotaxis to lactic acid was higher than to other organic acids.

Outcome
chemotaxis to lactic acide0
Direction
highere0
Comparator
ohterse0

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

Nicotiana tabacum
Nicotiana tabacum · TaxonJom / Joachim Müllerchen · CC BY 2.5 · Wikimedia Commons ↗

Verbatim

e0

“showed higher chemotaxis to lactic acid than ohters”

✓ located verbatim in the source · abstract, characters 608–659 · show in text ↑
e1

“The Che are 1.79 and 1.93 of P. fluorescens RB-89 and RB-42 at five hundreds times dilution of the condense of tobacco roots exudates”

✓ located verbatim in the source · abstract, characters 110–243 · show in text ↑
Observationobservedoriginal resultno effectmeasured

Claim · model-written summary

The strains showed no chemotaxis toward carbohydrates.

Interactor
strainse0symbiont
Outcome
chemotaxis toward the carbohydratese0
Direction
no chemotaxise0

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

Nicotiana tabacum
Nicotiana tabacum · TaxonJom / Joachim Müllerchen · CC BY 2.5 · Wikimedia Commons ↗

Verbatim

e0

“The strains showed no chemotaxis toward the carbohydrates”

✓ located verbatim in the source · abstract, characters 661–718 · show in text ↑
e1

“The Che are 1.79 and 1.93 of P. fluorescens RB-89 and RB-42 at five hundreds times dilution of the condense of tobacco roots exudates”

✓ located verbatim in the source · abstract, characters 110–243 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Soil sterilization increased colonization density on tobacco roots.

Treatment
soil sterilizatione0
Outcome
colonization densitye0
Direction
improved greatlye0

Not reportedComparator

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

Nicotiana tabacum
Nicotiana tabacum · TaxonJom / Joachim Müllerchen · CC BY 2.5 · Wikimedia Commons ↗

Verbatim

e0

“the colonization density were improved greatly with soil sterilization and chemotaxic materials”

✓ located verbatim in the source · abstract, characters 862–957 · show in text ↑
e1

“The Che are 1.79 and 1.93 of P. fluorescens RB-89 and RB-42 at five hundreds times dilution of the condense of tobacco roots exudates”

✓ located verbatim in the source · abstract, characters 110–243 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Chemotaxic materials increased colonization density on tobacco roots.

Treatment
chemotaxic materialse0
Outcome
colonization densitye0
Direction
improved greatlye0

Not reportedComparator

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

Nicotiana tabacum
Nicotiana tabacum · TaxonJom / Joachim Müllerchen · CC BY 2.5 · Wikimedia Commons ↗

Verbatim

e0

“the colonization density were improved greatly with soil sterilization and chemotaxic materials”

✓ located verbatim in the source · abstract, characters 862–957 · show in text ↑
e1

“The Che are 1.79 and 1.93 of P. fluorescens RB-89 and RB-42 at five hundreds times dilution of the condense of tobacco roots exudates”

✓ located verbatim in the source · abstract, characters 110–243 · show in text ↑

soil · disease · Nicotiana tabacum (tobacco)Positive and negative results

2 papers: 1 positive, 1 negative or no effect

1 in the opposite direction

  1. no effect
See all 2 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.