Abstract
Out of 39 isolates of rhizobacteria, recovered from economic plants grown in 8 locations in Egypt, 6 isolates were able to produce Hydrogen Cyanide (HCN). 16S rRNA sequence analysis identified these isolates as: Pseudomonas japonica strain NBRC 103040, Bacillus megaterium strain CtST3.5, Pseudomonas sp. strain Gamma-81, P. tolaasii strain ATCC 33618, P. chlororaphis strain Lzh-T5, and P. mosselii strain CV25. These HCN producers were able to inhibit growth of Agrobacterium tumefaciens and affect viability of Meloidogyne incognita juveniles in vitro. The isolates of P. japonica and Pseudomonas sp. Gamma-81 prevented the gall formation on tomato plants by A. tumefaciens, regardless of the presence of M. incognita. The isolates of B. megaterium, P. chlororaphis, P. tolaasii, and P. mosselii decreased the weight and number of galls produced by A. tumefaciens in the presence or absence of M. incognita. The 6 HCN producers decreased the population of M. incognita and the number of nematode galls than the positive control, when used against M. incognita. A similar effect was achieved against mixed infections with M. incognita and A. tumefaciens. The HCN-producing rhizobacteria, in the presence of A. tumefaciens and/or M. incognita, caused obvious increment in all growth parameters of tomato than the negative control and healthy plants. The only exception was found in case of Pseudomonas sp. Gamma-81 against M. incognita and against mixed infection, where growth parameters of tomato were decreased. Although the isolates were naturally isolated from the rhizosphere of economic plants, it must be cautiously considered since the isolate identified as P. japonica has been reported as a human pathogen. Also, P. tolaasii was reported causing a bacterial blotch on cultivated mushrooms under certain environmental conditions. Further investigations are needed.
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Claims 15
Claim · model-written summary
Six of 39 rhizobacterial isolates produced HCN.
Verbatim
e0“Out of 39 isolates of rhizobacteria, recovered from economic plants grown in 8 locations in Egypt, 6 isolates were able to produce Hydrogen Cyanide (HCN)”
Claim · model-written summary
Sequence analysis identified the six HCN-producing isolates as the six listed bacterial taxa.
Verbatim
e0“16S rRNA sequence analysis identified these isolates as: Pseudomonas japonica strain NBRC 103040, Bacillus megaterium strain CtST3.5, Pseudomonas sp. strain Gamma-81, P. tolaasii strain ATCC 33618, P. chlororaphis strain Lzh-T5, and P. mosselii strain CV25”
e1“Out of 39 isolates of rhizobacteria, recovered from economic plants grown in 8 locations in Egypt, 6 isolates were able to produce Hydrogen Cyanide (HCN)”
Claim · model-written summary
HCN-producing isolates inhibited A. tumefaciens growth in vitro.
- Taxon
- economic plantse1
- Interactor
- Agrobacterium tumefaciens
Agrobacterium tumefaciense0pathogen - Outcome
- growth of Agrobacterium tumefaciense0
- Direction
- inhibite0
- Setting
- in vitroe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“These HCN producers were able to inhibit growth of Agrobacterium tumefaciens and affect viability of Meloidogyne incognita juveniles in vitro”
e1“recovered from economic plants grown in 8 locations in Egypt”
Claim · model-written summary
HCN-producing isolates affected M. incognita juvenile viability in vitro.
- Taxon
- economic plantse1
- Interactor
- Meloidogyne incognita
_penetrates_a_tomato_root_-_USDA-ARS.jpg?width=60)
Meloidogyne incognitae0pest - Outcome
- viability of Meloidogyne incognita juvenilese0
- Setting
- in vitroe0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_penetrates_a_tomato_root_-_USDA-ARS.jpg?width=500)
Verbatim
e0“These HCN producers were able to inhibit growth of Agrobacterium tumefaciens and affect viability of Meloidogyne incognita juveniles in vitro”
e1“recovered from economic plants grown in 8 locations in Egypt”
Claim · model-written summary
P. japonica prevented A. tumefaciens gall formation on tomato with or without nematodes.
- Taxon
- tomato plants
Solanum lycopersicume0 - Treatment
- P. japonicae0
- Interactor
- A. tumefaciensAgrobacterium tumefaciense0pathogen
- Second interactor
- P. japonicaPseudomonas japonicae0biocontrol_agent
- Outcome
- gall formation on tomato plants by A. tumefaciense0
- Direction
- preventede0
- Qualifier
- regardless of the presence of M. incognitae0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The isolates of P. japonica and Pseudomonas sp. Gamma-81 prevented the gall formation on tomato plants by A. tumefaciens, regardless of the presence of M. incognita”
Claim · model-written summary
Pseudomonas sp. Gamma-81 prevented A. tumefaciens gall formation on tomato with or without nematodes.
- Taxon
- tomato plantsSolanum lycopersicume0
- Treatment
- Pseudomonas sp. Gamma-81e0
- Interactor
- A. tumefaciensAgrobacterium tumefaciense0pathogen
- Second interactor
- Pseudomonas sp. Gamma-81e0biocontrol_agent
- Outcome
- gall formation on tomato plants by A. tumefaciense0
- Direction
- preventede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The isolates of P. japonica and Pseudomonas sp. Gamma-81 prevented the gall formation on tomato plants by A. tumefaciens, regardless of the presence of M. incognita”
Claim · model-written summary
B. megaterium decreased A. tumefaciens gall weight and number.
- Taxon
- tomato plantsSolanum lycopersicumt0
- Treatment
- B. megateriume0
- Interactor
- A. tumefaciensAgrobacterium tumefaciense0pathogen
- Second interactor
- B. megaterium
Priestia megateriume0biocontrol_agent - Outcome
- weight and number of galls produced by A. tumefaciense0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The isolates of B. megaterium, P. chlororaphis, P. tolaasii, and P. mosselii decreased the weight and number of galls produced by A. tumefaciens in the presence or absence of M. incognita”
t0“gall formation on tomato plants by A. tumefaciens”
Claim · model-written summary
P. chlororaphis decreased A. tumefaciens gall weight and number.
- Taxon
- tomato plantsSolanum lycopersicumt0
- Treatment
- P. chlororaphise0
- Interactor
- A. tumefaciensAgrobacterium tumefaciense0pathogen
- Second interactor
- P. chlororaphisPseudomonas chlororaphise0biocontrol_agent
- Outcome
- weight and number of galls produced by A. tumefaciense0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The isolates of B. megaterium, P. chlororaphis, P. tolaasii, and P. mosselii decreased the weight and number of galls produced by A. tumefaciens in the presence or absence of M. incognita”
t0“gall formation on tomato plants by A. tumefaciens”
Claim · model-written summary
P. tolaasii decreased A. tumefaciens gall weight and number.
- Taxon
- tomato plantsSolanum lycopersicumt0
- Treatment
- P. tolaasiie0
- Interactor
- A. tumefaciensAgrobacterium tumefaciense0pathogen
- Second interactor
- P. tolaasiiPseudomonas tolaasiie0biocontrol_agent
- Outcome
- weight and number of galls produced by A. tumefaciense0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The isolates of B. megaterium, P. chlororaphis, P. tolaasii, and P. mosselii decreased the weight and number of galls produced by A. tumefaciens in the presence or absence of M. incognita”
t0“gall formation on tomato plants by A. tumefaciens”
Claim · model-written summary
P. mosselii decreased A. tumefaciens gall weight and number.
- Taxon
- tomato plantsSolanum lycopersicumt0
- Treatment
- P. mosseliie0
- Interactor
- A. tumefaciensAgrobacterium tumefaciense0pathogen
- Second interactor
- P. mosseliiPseudomonas mosseliie0biocontrol_agent
- Outcome
- weight and number of galls produced by A. tumefaciense0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The isolates of B. megaterium, P. chlororaphis, P. tolaasii, and P. mosselii decreased the weight and number of galls produced by A. tumefaciens in the presence or absence of M. incognita”
t0“gall formation on tomato plants by A. tumefaciens”
Claim · model-written summary
The six HCN producers reduced M. incognita populations versus positive control.
- Taxon
- tomato plantsSolanum lycopersicumt0
- Treatment
- 6 HCN producerse0
- Interactor
- M. incognitaMeloidogyne incognitae0pest
- Outcome
- population of M. incognitae0
- Direction
- decreasede0
- Comparator
- positive controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The 6 HCN producers decreased the population of M. incognita and the number of nematode galls than the positive control, when used against M. incognita”
t0“gall formation on tomato plants by A. tumefaciens”
Claim · model-written summary
The six HCN producers reduced nematode gall numbers versus positive control.
- Taxon
- tomato plantsSolanum lycopersicumt0
- Treatment
- 6 HCN producerse0
- Interactor
- M. incognitaMeloidogyne incognitae0pest
- Outcome
- number of nematode gallse0
- Direction
- decreasede0
- Comparator
- positive controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The 6 HCN producers decreased the population of M. incognita and the number of nematode galls than the positive control, when used against M. incognita”
t0“gall formation on tomato plants by A. tumefaciens”
Claim · model-written summary
Similar suppression occurred in mixed nematode and bacterial infections.
- Taxon
- tomato plantsSolanum lycopersicumt0
- Interactor
- M. incognitaMeloidogyne incognitae0pest
- Second interactor
- A. tumefaciensAgrobacterium tumefaciense0pathogen
- Outcome
- mixed infections with M. incognita and A. tumefaciense0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A similar effect was achieved against mixed infections with M. incognita and A. tumefaciens”
t0“gall formation on tomato plants by A. tumefaciens”
Claim · model-written summary
HCN-producing rhizobacteria increased tomato growth parameters under infection.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- HCN-producing rhizobacteriae0
- Interactor
- A. tumefaciensAgrobacterium tumefaciense0pathogen
- Second interactor
- M. incognitaMeloidogyne incognitae0pest
- Outcome
- all growth parameters of tomatoe0
- Direction
- incremente0
- Comparator
- negative control and healthy plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The HCN-producing rhizobacteria, in the presence of A. tumefaciens and/or M. incognita, caused obvious increment in all growth parameters of tomato than the negative control and healthy plants”
Claim · model-written summary
Gamma-81 lowered tomato growth under nematode or mixed infection.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- Pseudomonas sp. Gamma-81e0
- Interactor
- M. incognitaMeloidogyne incognitae0pest
- Second interactor
- Pseudomonas sp. Gamma-81e0biocontrol_agent
- Outcome
- growth parameters of tomatoe0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pseudomonas sp. Gamma-81 against M. incognita and against mixed infection, where growth parameters of tomato were decreased”
The same questions in other papers
Pseudomonas · Meloidogyne incognita · Solanum lycopersicum (tomato)Positive and negative results
2 in the opposite direction
- positive
- positive
radiation · Meloidogyne incognita · Solanum lycopersicum (tomato)Positive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- positive
- negative
inoculation · Agrobacterium tumefaciens · Solanum lycopersicum (tomato)Positive and negative results
1 paper in the same direction as this paper · 3 in the opposite direction
- negative
- negative
- no effect
1 paper more in this group
See all 5 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.