Abstract
Plant-parasitic nematodes cause serious crop losses worldwidely. This study intended to discover the antagonistic mechanism of Bacillus cereus strain S2 against Meloidogyne incognita. Treatment with B. cereus strain S2 resulted in a mortality of 77.89% to Caenorhabditis elegans (a model organism) and 90.96% to M. incognita. In pot experiment, control efficiency of B. cereus S2 culture or supernatants were 81.36% and 67.42% towards M. incognita, respectively. In field experiment, control efficiency was 58.97% towards M. incognita. Nematicidal substances were isolated from culture supernatant of B. cereus S2 by polarity gradient extraction, silica gel column chromatography and HPLC. Two nematicidal compounds were identified as C16 sphingosine and phytosphingosine by LC-MS. The median lethal concentration of sphingosine was determined as 0.64 μg/ml. Sphingosine could obviously inhibit reproduction of C. elegans, with an inhibition rate of 42.72% for 24 h. After treatment with sphingosine, ROS was induced in intestinal tract, and genital area disappeared in nematode. Furthermore, B. cereus S2 could induce systemic resistance in tomato, and enhance activity of defense-related enzymes for biocontrol of M. incognita. This study demonstrates the nematicidal activity of B. cereus and its product sphingosine, as well provides a possibility for biocontrol of M. incognita.
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Claims 5
Claim · model-written summary
B. cereus S2 culture had 81.36% control efficiency against M. incognita in pots.
- Taxon
- tomato
Solanum lycopersicumt0 - Treatment
- B. cereus S2 culturee0
- Interactor
- M. incognita
_penetrates_a_tomato_root_-_USDA-ARS.jpg?width=60)
Meloidogyne incognitae0pest - Second interactor
- B. cereus S2
Bacillus cereuse0biocontrol_agent - Outcome
- control efficiencye0
- Value
- 81.36%e0
- Setting
- pot experimente0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_penetrates_a_tomato_root_-_USDA-ARS.jpg?width=500)
Verbatim
e0“In pot experiment, control efficiency of B. cereus S2 culture or supernatants were 81.36% and 67.42% towards M. incognita, respectively.”
t0“systemic resistance in tomato”
Claim · model-written summary
B. cereus S2 supernatant had 67.42% control efficiency against M. incognita in pots.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- supernatantse0
- Interactor
- M. incognitaMeloidogyne incognitae0pest
- Second interactor
- B. cereus S2Bacillus cereuse0biocontrol_agent
- Outcome
- control efficiencye0
- Value
- 67.42%e0
- Setting
- pot experimente0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In pot experiment, control efficiency of B. cereus S2 culture or supernatants were 81.36% and 67.42% towards M. incognita, respectively.”
t0“systemic resistance in tomato”
Claim · model-written summary
Field control efficiency against M. incognita was 58.97%.
- Taxon
- tomatoSolanum lycopersicumt0
- Interactor
- M. incognitaMeloidogyne incognitae0pest
- Outcome
- control efficiencye0
- Value
- 58.97%e0
- Setting
- field experimente0
Not reportedTreatmentComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In field experiment, control efficiency was 58.97% towards M. incognita.”
t0“systemic resistance in tomato”
Claim · model-written summary
B. cereus S2 induced systemic resistance in tomato.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- B. cereus S2e0
- Interactor
- B. cereus S2Bacillus cereuse0biocontrol_agent
- Outcome
- systemic resistancee0
- Direction
- inducee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“B. cereus S2 could induce systemic resistance in tomato”
Claim · model-written summary
B. cereus S2 enhanced defense-related enzyme activity in tomato.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- B. cereus S2e0
- Interactor
- M. incognitaMeloidogyne incognitae0pest
- Second interactor
- B. cereus S2Bacillus cereuse0biocontrol_agent
- Outcome
- activity of defense-related enzymese0
- Direction
- enhancee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“B. cereus S2 could induce systemic resistance in tomato, and enhance activity of defense-related enzymes for biocontrol of M. incognita.”
The same questions in other papers
Bacillus cereus · Meloidogyne incognita · Solanum lycopersicum (tomato)Results agree
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- positive
- positive
- positive
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5 papers in the same direction as this paper
- positive
- positive
- positive
2 papers more in this group
See all 6 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.