Abstract
The potential of seven rhizobacterial strains to prevent attacks of rice cv. Basmati-370 seedlings by the rice root-knot nematode, Meloidogyne graminicola, was evaluated in screenhouse tests. In in planta tests, all the rhizobacteria were found to possess significant activity against M. graminicola. Seed inoculation with Gluconacetobacter diazotrophicus Co99-70 was the most effective in preventing J2 penetration, by up to 92%. Bacillus sp. RKB-91, G. diazotrophicus Co99-70 and Pseudomonas sp. RKP-33 were highly effective in reducing galling severity (by more than 80%) and in lowering nematode multiplication. These bacteria also promoted root and shoot growth of seedlings. In an in vitro test, exposure to culture supernatant of G. diazotrophicus Co99-70, Pseudomonas sp. RKP-33, and Bacillus sp. RKB-91 significantly delayed and decreased egg hatching and irreversibly inactivated motility of infective juveniles of the nematode by 64%, 89% and 77%, respectively, within 24 h of exposure.
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Claims 7
Claim · model-written summary
All seven rhizobacteria had significant activity against the nematode in planta.
- Taxon
- rice
Oryza sativat0 - Treatment
- all the rhizobacteriae0
- Interactor
- M. graminicolaMeloidogyne graminicolae0pathogen
- Outcome
- activity against M. graminicolae0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In in planta tests, all the rhizobacteria were found to possess significant activity against M. graminicola.”
t0“rice seedlings”
Claim · model-written summary
Seed inoculation with G. diazotrophicus Co99-70 reduced J2 penetration by up to 92%.
- Taxon
- riceOryza sativat0
- Treatment
- Seed inoculation with Gluconacetobacter diazotrophicus Co99-70e0
- Interactor
- Gluconacetobacter diazotrophicus Co99-70Gluconacetobacter diazotrophicuse0biocontrol_agent
- Outcome
- J2 penetratione0
- Direction
- preventinge0
- Value
- up to 92%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seed inoculation with Gluconacetobacter diazotrophicus Co99-70 was the most effective in preventing J2 penetration, by up to 92%.”
t0“rice seedlings”
Claim · model-written summary
Three bacterial strains reduced galling by more than 80%.
- Taxon
- riceOryza sativat0
- Treatment
- Bacillus sp. RKB-91, G. diazotrophicus Co99-70 and Pseudomonas sp. RKP-33e0
- Outcome
- galling severitye0
- Direction
- reducinge0
- Value
- more than 80%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Bacillus sp. RKB-91, G. diazotrophicus Co99-70 and Pseudomonas sp. RKP-33 were highly effective in reducing galling severity (by more than 80%) and in lowering nematode multiplication.”
t0“rice seedlings”
Claim · model-written summary
The three strains lowered nematode multiplication.
- Taxon
- riceOryza sativat0
- Treatment
- Bacillus sp. RKB-91, G. diazotrophicus Co99-70 and Pseudomonas sp. RKP-33e0
- Outcome
- nematode multiplicatione0
- Direction
- loweringe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Bacillus sp. RKB-91, G. diazotrophicus Co99-70 and Pseudomonas sp. RKP-33 were highly effective in reducing galling severity (by more than 80%) and in lowering nematode multiplication.”
t0“rice seedlings”
Claim · model-written summary
These bacteria promoted seedling root and shoot growth.
- Taxon
- riceOryza sativat0
- Treatment
- These bacteriae0
- Outcome
- root and shoot growthe0
- Direction
- promotede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“These bacteria also promoted root and shoot growth of seedlings.”
t0“rice seedlings”
Claim · model-written summary
Culture supernatants of the three bacteria delayed and decreased nematode egg hatching.
- Taxon
- riceOryza sativat0
- Outcome
- egg hatchinge0
- Direction
- delayed and decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“exposure to culture supernatant of G. diazotrophicus Co99-70, Pseudomonas sp. RKP-33, and Bacillus sp. RKB-91 significantly delayed and decreased egg hatching”
t0“rice seedlings”
e2“the nematode”
Claim · model-written summary
The three supernatants inactivated juvenile motility by 64%, 89% and 77%, respectively.
- Taxon
- riceOryza sativat0
- Outcome
- motility of infective juveniles of the nematodee0
- Direction
- inactivatede0
- Value
- 64%, 89% and 77%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“irreversibly inactivated motility of infective juveniles of the nematode by 64%, 89% and 77%, respectively, within 24 h of exposure.”
t0“rice seedlings”
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See all 399 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.