Abstract
ABSTRACT In 2016, several reports emerged of fresh-market staked tomato plants with severe symptoms of pith necrosis and premature death in commercial cultivation areas in the states of Paraná and Minas Gerais, Brazil, which are similar to those caused by Pseudomonas corrugata. Four bacterial strains were isolated from infected tissue samples and characterized as Gram-negative, aerobic, and fluorescent on King’s B Medium. LOPAT tests were performed and the isolate UFU H120 was classified into group Vb (+ + − + −) and the isolates UFU H3, UFU H6, and UFU H21 into group Va (− + − + −). The pathogenicity of the isolates was confirmed by artificial inoculation on tomato plants of Santa Cruz type, cv. Kada Gigante, and Koch’s postulates were accomplished successfully. The isolates sequences of their 16S rRNA gene region were compared with those deposited in GenBank, the isolate UFU H120 aligning with Pseudomonas fluorescens (99,45% similarity) and the isolates UFU H3, UFU H6, and UFU H21 with Pseudomonas putida (99.2, 99.53 and 99.64% similarity, respectively). Notably, P. fluorescens and P. putida are most known as saprophytic bacteria normally present in the soil, although both of these species have already been reported to infect tomato plants in Italy. However, so far, there have not been any reports of such bacteria being phytopathogenic on tomato or any crop in Brazil. Thus, to our knowledge, this is the first report of pith necrosis of such occurrence in Brazil.
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Claims 10
Claim · model-written summary
Tomato plants in Paraná and Minas Gerais had severe pith necrosis and premature death.
- Taxon
- tomato
Solanum lycopersicume0 - Outcome
- severe symptoms of pith necrosis and premature deathe0
- Setting
- Paraná and Minas Gerais, Brazile0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“fresh-market staked tomato plants with severe symptoms of pith necrosis and premature death in commercial cultivation areas in the states of Paraná and Minas Gerais, Brazil”
t0“Pseudomonas fluorescens and P. putida”
Claim · model-written summary
Four bacteria isolated from infected tomato tissue were Gram-negative, aerobic, and fluorescent on King’s B Medium.
- Taxon
- tomatoSolanum lycopersicumt0
- Interactor
- bacterial strainse0pathogen
- Outcome
- Gram-negative, aerobic, and fluorescent on King’s B Mediume0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Four bacterial strains were isolated from infected tissue samples and characterized as Gram-negative, aerobic, and fluorescent on King’s B Medium.”
t0“tomato pith necrosis”
Claim · model-written summary
Isolate UFU H120 was classified in LOPAT group Vb.
- Taxon
- tomatoSolanum lycopersicumt0
- Interactor
- isolate UFU H120e0pathogen
- Outcome
- group Vb (+ + − + −)e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the isolate UFU H120 was classified into group Vb (+ + − + −)”
t0“tomato pith necrosis”
Claim · model-written summary
UFU H3, UFU H6, and UFU H21 were classified in LOPAT group Va.
- Taxon
- tomatoSolanum lycopersicumt0
- Interactor
- UFU H3, UFU H6, and UFU H21e0pathogen
- Outcome
- group Va (− + − + −)e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the isolates UFU H3, UFU H6, and UFU H21 into group Va (− + − + −)”
t0“tomato pith necrosis”
Claim · model-written summary
Artificial inoculation confirmed that the isolates were pathogenic on Kada Gigante tomato.
- Taxon
- tomatoSolanum lycopersicume0
- Material
- Kada Gigantee0
- Treatment
- artificial inoculatione0
- Interactor
- isolatese0pathogen
- Outcome
- pathogenicity of the isolates was confirmede0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The pathogenicity of the isolates was confirmed by artificial inoculation on tomato plants of Santa Cruz type, cv. Kada Gigante, and Koch’s postulates were accomplished successfully.”
t0“Pseudomonas fluorescens and P. putida”
Claim · model-written summary
UFU H120 16S rRNA aligned with Pseudomonas fluorescens at 99,45% similarity.
- Taxon
- tomatoSolanum lycopersicumt0
- Interactor
- Pseudomonas fluorescens
.JPG?width=60)
Pseudomonas fluorescense0pathogen - Outcome
- similaritye0
- Value
- 99,45%e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.JPG?width=500)
Verbatim
e0“the isolate UFU H120 aligning with Pseudomonas fluorescens (99,45% similarity)”
t0“tomato”
Claim · model-written summary
UFU H3 16S rRNA aligned with Pseudomonas putida at 99.2% similarity.
- Taxon
- tomatoSolanum lycopersicumt0
- Interactor
- Pseudomonas putida
Pseudomonas putidae0pathogen - Outcome
- similaritye0
- Value
- 99.2e0
- Qualifier
- UFU H3e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the isolates UFU H3, UFU H6, and UFU H21 with Pseudomonas putida (99.2, 99.53 and 99.64% similarity, respectively)”
t0“tomato”
Claim · model-written summary
UFU H6 16S rRNA aligned with Pseudomonas putida at 99.53% similarity.
- Taxon
- tomatoSolanum lycopersicumt0
- Interactor
- Pseudomonas putidaPseudomonas putidae0pathogen
- Outcome
- similaritye0
- Value
- 99.53e0
- Qualifier
- UFU H6e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the isolates UFU H3, UFU H6, and UFU H21 with Pseudomonas putida (99.2, 99.53 and 99.64% similarity, respectively)”
t0“tomato”
Claim · model-written summary
UFU H21 16S rRNA aligned with Pseudomonas putida at 99.64% similarity.
- Taxon
- tomatoSolanum lycopersicumt0
- Interactor
- Pseudomonas putidaPseudomonas putidae0pathogen
- Outcome
- similaritye0
- Value
- 99.64%e0
- Qualifier
- UFU H21e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the isolates UFU H3, UFU H6, and UFU H21 with Pseudomonas putida (99.2, 99.53 and 99.64% similarity, respectively)”
t0“tomato”
Claim · model-written summary
The authors report tomato pith necrosis associated with P. fluorescens and P. putida in Brazil for the first time.
- Taxon
- tomatoSolanum lycopersicumt0
- Interactor
- Pseudomonas fluorescensPseudomonas fluorescenst0pathogen
- Outcome
- pith necrosist0
- Qualifier
- first reporte0
- Setting
- Brazilt0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“this is the first report of pith necrosis of such occurrence in Brazil.”
t0“Occurrence of Pseudomonas fluorescens and P. putida associated to tomato pith necrosis in Brazil”
The same questions in other papers
inoculation · disease · Solanum lycopersicum (tomato)Positive and negative results
129 papers in the same direction as this paper · 136 in the opposite direction
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