Abstract
The bacterium Stenotrophomonas rhizophila is known to be beneficial for plants and has been frequently isolated from the rhizosphere of crops. In the present work, we isolated from the phyllosphere of an ornamental plant an epiphytic strain of S. rhizophila that we named Ep2.2 and investigated its possible application in crop protection. Compared to S. maltophilia LMG 958, a well-known plant beneficial species which behaves as opportunistic human pathogen, S. rhizophila Ep2.2 showed distinctive features, such as different motility, a generally reduced capacity to use carbon sources, a greater sensitivity to fusidic acid and potassium tellurite, and the inability to grow at the human body temperature. S. rhizophila Ep2.2 was able to inhibit in vitro growth of the plant pathogenic fungi Alternaria alternata and Botrytis cinerea through the emission of volatile compounds. Simultaneous PTR-MS and GC-MS analyses revealed the emission, by S. rhizophila Ep2.2, of volatile organic compounds (VOCs) with well-documented antifungal activity, such as furans, sulphur-containing compounds and terpenes. When sprayed on tomato leaves and plants, S. rhizophila Ep2.2 was able to restrict B. cinerea infection and to prime the expression of Pti5 , GluA and PR1 plant defense genes.
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Claims 6
Claim · model-written summary
Ep2.2 differed from S. maltophilia in motility, carbon use, chemical sensitivity and temperature growth.
Verbatim
e0“Compared to S. maltophilia LMG 958, a well-known plant beneficial species which behaves as opportunistic human pathogen, S. rhizophila Ep2.2 showed distinctive features, such as different motility, a generally reduced capacity to use carbon sources, a greater sensitivity to fusidic acid and potassium tellurite, and the inability to grow at the human body temperature.”
t0“the phyllosphere of an ornamental plant”
Claim · model-written summary
Ep2.2 inhibited in vitro Alternaria alternata growth through volatiles.
- Taxon
- ornamental plantt0
- Interactor
- Alternaria alternata
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Alternaria alternatae0pathogen - Second interactor
- S. rhizophila Ep2.2Stenotrophomonas rhizophilae0biocontrol_agent
- Outcome
- growth of the plant pathogenic fungi Alternaria alternatae0
- Direction
- inhibite0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“S. rhizophila Ep2.2 was able to inhibit in vitro growth of the plant pathogenic fungi Alternaria alternata and Botrytis cinerea through the emission of volatile compounds.”
t0“the phyllosphere of an ornamental plant”
Claim · model-written summary
Ep2.2 inhibited in vitro Botrytis cinerea growth through volatiles.
- Taxon
- ornamental plantt0
- Interactor
- Botrytis cinerea
Botrytis cinereae0pathogen - Second interactor
- S. rhizophila Ep2.2Stenotrophomonas rhizophilae0biocontrol_agent
- Outcome
- growth of the plant pathogenic fungi Alternaria alternata and Botrytis cinereae0
- Direction
- inhibite0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“S. rhizophila Ep2.2 was able to inhibit in vitro growth of the plant pathogenic fungi Alternaria alternata and Botrytis cinerea through the emission of volatile compounds.”
t0“the phyllosphere of an ornamental plant”
Claim · model-written summary
Ep2.2 emitted volatile compounds with documented antifungal activity.
- Taxon
- ornamental plantt0
- Interactor
- S. rhizophila Ep2.2Stenotrophomonas rhizophilae0biocontrol_agent
- Outcome
- volatile organic compounds (VOCs) with well-documented antifungal activitye0
Verbatim
e0“S. rhizophila Ep2.2, of volatile organic compounds (VOCs) with well-documented antifungal activity, such as furans, sulphur-containing compounds and terpenes.”
t0“the phyllosphere of an ornamental plant”
Claim · model-written summary
Sprayed Ep2.2 restricted B. cinerea infection of tomato.
- Taxon
- tomato
Solanum lycopersicume0 - Treatment
- sprayed on tomato leaves and plants, S. rhizophila Ep2.2e0
- Interactor
- B. cinereaBotrytis cinereae0pathogen
- Second interactor
- S. rhizophila Ep2.2Stenotrophomonas rhizophilae0biocontrol_agent
- Outcome
- B. cinerea infectione0
- Direction
- restricte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When sprayed on tomato leaves and plants, S. rhizophila Ep2.2 was able to restrict B. cinerea infection”
Claim · model-written summary
Sprayed Ep2.2 primed tomato Pti5, GluA and PR1 defence gene expression.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- sprayed on tomato leaves and plants, S. rhizophila Ep2.2e0
- Interactor
- S. rhizophila Ep2.2Stenotrophomonas rhizophilae0biocontrol_agent
- Gene
- Pti5 , GluA and PR1e0
- Outcome
- expression of Pti5 , GluA and PR1 plant defense genese0
- Direction
- primee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When sprayed on tomato leaves and plants, S. rhizophila Ep2.2 was able to restrict B. cinerea infection and to prime the expression of Pti5 , GluA and PR1 plant defense genes.”
The same questions in other papers
application · molecular: expression · Solanum lycopersicum (tomato)Positive and negative results
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- negative
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See all 15 papers →application · Botrytis cinerea · Solanum lycopersicum (tomato)Positive and negative results
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- no effect
- negative
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See all 23 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.