Paper · 2005 · PubMed

[The effect of tryptophan of plant root metabolites on the phyto stimulating activity of rhizobacteria ].

L V Kravchenko; T S Azarova; N M Makarova; et al.

7
claims
8
verbatim quotes
25
citations
2
research areas
—
Not open access

Abstract

Aseptic tomato and radish roots were found to exude 2.8-5.3 and 290-390 ng tryptophan per seedling per day. The inoculation of radish plants with rhizosphere pseudomonads increased the root biomass by 1.4 times. The inoculation of tomato plants with the same pseudomonads was ineffective. The beneficial effect of bacterial inoculation on the radish plants can be explained by the fact that the introduced rhizobacteria produce the plant growth-stimulating hormone indole-3-acetic acid. In pot experiments, the addition of this phytohormone to the soil increased the mass of radish roots by 36%. The phytohormonal action of the rhizosphere microflora was found to be efficient provided that the concentration of tryptophan in the rhizosphere is sufficiently high.

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 7

Observationobservedoriginal resultmeasured

Claim · model-written summary

Aseptic tomato roots exuded 2.8-5.3 ng tryptophan per seedling per day.

Organ / stage
rootse0
Outcome
exudee0
Value
2.8-5.3e0
Qualifier
tryptophan per seedling per daye0

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

Solanum lycopersicum
Solanum lycopersicum · TaxonKod B · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“Aseptic tomato and radish roots were found to exude 2.8-5.3 and 290-390 ng tryptophan per seedling per day”

✓ located verbatim in the source · abstract, characters 0–106 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

Aseptic radish roots exuded 290-390 ng tryptophan per seedling per day.

Organ / stage
rootse0
Outcome
exudee0
Value
290-390 nge0
Qualifier
tryptophan per seedling per daye0

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

Raphanus sativus
Raphanus sativus · TaxonSelf, en:User:Jengod · Public domain · Wikimedia Commons ↗

Verbatim

e0

“Aseptic tomato and radish roots were found to exude 2.8-5.3 and 290-390 ng tryptophan per seedling per day”

✓ located verbatim in the source · abstract, characters 0–106 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Inoculation of radish with rhizosphere pseudomonads increased root biomass by 1.4 times.

Treatment
inoculation of radish plants with rhizosphere pseudomonadse1
Interactor
rhizosphere pseudomonadse1symbiont
Outcome
root biomasse1
Direction
increasede1
Value
1.4 timese1

Not reportedComparator

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

Raphanus sativus
Raphanus sativus · TaxonSelf, en:User:Jengod · Public domain · Wikimedia Commons ↗

Verbatim

e1

“The inoculation of radish plants with rhizosphere pseudomonads increased the root biomass by 1.4 times”

✓ located verbatim in the source · abstract, characters 108–210 · show in text ↑
Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

Inoculation of tomato with the same pseudomonads was ineffective.

Treatment
inoculation of tomato plants with the same pseudomonadse2
Interactor
pseudomonadse2symbiont
Outcome
ineffectivee2

Not reportedComparatorDirection

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

Solanum lycopersicum
Solanum lycopersicum · TaxonKod B · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e2

“The inoculation of tomato plants with the same pseudomonads was ineffective”

✓ located verbatim in the source · abstract, characters 212–287 · show in text ↑
Mechanismauthor interpretationoriginal resultpositivebasis n/a

Claim · model-written summary

The beneficial effect of bacterial inoculation on radish is explained by rhizobacteria producing indole-3-acetic acid.

Interactor
rhizobacteriaHyphomicrobialese3symbiont
Compound
indole-3-acetic acide3
Outcome
beneficial effect of bacterial inoculatione3

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

Raphanus sativus
Raphanus sativus · TaxonSelf, en:User:Jengod · Public domain · Wikimedia Commons ↗

Verbatim

e3

“The beneficial effect of bacterial inoculation on the radish plants can be explained by the fact that the introduced rhizobacteria produce the plant growth-stimulating hormone indole-3-acetic acid”

✓ located verbatim in the source · abstract, characters 289–485 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Adding this phytohormone to the soil in pot experiments increased radish root mass by 36%.

Treatment
addition of this phytohormone to the soile4
Outcome
mass of radish rootse4
Direction
increasede4
Value
36%e4
Setting
pot experimentse4

Not reportedComparator

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

Raphanus sativus
Raphanus sativus · TaxonSelf, en:User:Jengod · Public domain · Wikimedia Commons ↗

Verbatim

e4

“In pot experiments, the addition of this phytohormone to the soil increased the mass of radish roots by 36%”

✓ located verbatim in the source · abstract, characters 487–594 · show in text ↑
Associationobservedoriginal resultpositivemeasured

Claim · model-written summary

Phytohormonal action of rhizosphere microflora was efficient when rhizosphere tryptophan concentration was sufficiently high.

Taxon
plantt0
Interactor
rhizosphere microflorae5symbiont
Compound
tryptophane5
Outcome
phytohormonal actione5
Qualifier
provided that the concentration of tryptophan in the rhizosphere is sufficiently highe5

Not reportedDirection

Verbatim

t0

“plant root metabolites”

✓ located verbatim in the source · title, characters 29–51 · show in text ↑
e5

“The phytohormonal action of the rhizosphere microflora was found to be efficient provided that the concentration of tryptophan in the rhizosphere is sufficiently high”

✓ located verbatim in the source · abstract, characters 596–762 · show in text ↑

inoculation · growth · Raphanus sativus (radish)Positive and negative results

25 papers: 22 positive, 3 negative or no effect

21 papers in the same direction as this paper · 3 in the opposite direction

  1. negative
  2. negative
  3. negative

21 papers more in this group

See all 25 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.