Abstract
Soil salinity is an enormous problem affecting global agricultural productivity. Deep-sea actinobacteria are interesting due to their salt tolerance mechanisms. In the present study, we aim to determine the ability of deep-sea Dermacoccus (D. barathri MT2.1T and D. profundi MT2.2T) to promote tomato seedlings under 150 mM NaCl compared with the terrestrial strain D. nishinomiyaensis DSM20448T. All strains exhibit in vitro plant growth-promoting traits of indole-3-acetic acid production, phosphate solubilization, and siderophore production. Tomato seedlings inoculated with D. barathri MT2.1T showed higher growth parameters (shoot and root length, dry weight, and chlorophyll content) than non-inoculated tomato and the terrestrial strain under 150 mM NaCl. In addition, hydrogen peroxide (H2O2) in leaves of tomatoes inoculated with deep-sea Dermacoccus was lower than the control seedlings. This observation suggested that deep-sea Dermacoccus mitigated salt stress by reducing oxidative stress caused by hydrogen peroxide. D. barathri MT2.1T showed no harmful effects on Caenorhabditis elegans, Daphnia magna, Eisenia foetida, and Escherichia coli MC4100 in biosafety tests. This evidence suggests that D. barathri MT2.1T would be safe for use in the environment. Our results highlight the potential of deep-sea Dermacoccus as a plant growth promoter for tomatoes under salinity stress.
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Claims 5
Claim · model-written summary
All tested Dermacoccus strains showed in vitro plant growth-promoting traits: indole-3-acetic acid production, phosphate solubilization and siderophore production.
- Outcome
- indole-3-acetic acid production, phosphate solubilization, and siderophore productione0
- Qualifier
- in vitroe0
Not reportedTaxon
Verbatim
e0“All strains exhibit in vitro plant growth-promoting traits of indole-3-acetic acid production, phosphate solubilization, and siderophore production”
Claim · model-written summary
Tomato seedlings inoculated with D. barathri MT2.1T had higher shoot and root length and dry weight than non-inoculated tomato and the terrestrial strain under 150 mM NaCl.
- Taxon
- Tomato
Solanum lycopersicume0 - Treatment
- inoculated with D. barathri MT2.1Te0
- Interactor
- D. barathri MT2.1TDermacoccus barathrie0symbiont
- Outcome
- shoot and root length, dry weighte0
- Direction
- highere0
- Qualifier
- under 150 mM NaCle0
- Comparator
- non-inoculated tomato and the terrestrial straine0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Tomato seedlings inoculated with D. barathri MT2.1T showed higher growth parameters (shoot and root length, dry weight, and chlorophyll content) than non-inoculated tomato and the terrestrial strain under 150 mM NaCl”
Claim · model-written summary
Tomato seedlings inoculated with D. barathri MT2.1T had higher chlorophyll content than non-inoculated tomato and the terrestrial strain under 150 mM NaCl.
- Taxon
- TomatoSolanum lycopersicume0
- Treatment
- inoculated with D. barathri MT2.1Te0
- Interactor
- D. barathri MT2.1TDermacoccus barathrie0symbiont
- Outcome
- chlorophyll contente0
- Direction
- highere0
- Qualifier
- under 150 mM NaCle0
- Comparator
- non-inoculated tomato and the terrestrial straine0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Tomato seedlings inoculated with D. barathri MT2.1T showed higher growth parameters (shoot and root length, dry weight, and chlorophyll content) than non-inoculated tomato and the terrestrial strain under 150 mM NaCl”
Claim · model-written summary
Leaf hydrogen peroxide was lower in tomatoes inoculated with deep-sea Dermacoccus than in control seedlings.
- Taxon
- tomatoesSolanum lycopersicume0
- Organ / stage
- leavese0
- Treatment
- inoculated with deep-sea Dermacoccuse0
- Interactor
- deep-sea Dermacoccuse0symbiont
- Outcome
- hydrogen peroxide (H2O2)e0
- Direction
- lowere0
- Comparator
- control seedlingse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“hydrogen peroxide (H2O2) in leaves of tomatoes inoculated with deep-sea Dermacoccus was lower than the control seedlings”
Claim · model-written summary
D. barathri MT2.1T showed no harmful effects on Caenorhabditis elegans, Daphnia magna, Eisenia foetida or Escherichia coli MC4100 in biosafety tests.
- Taxon
- Caenorhabditis elegans, Daphnia magna, Eisenia foetida, and Escherichia coli MC4100
.jpg?width=60)
Escherichia coli
Caenorhabditis elegans
Eisenia fetida
Daphnia magnae0 - Treatment
- D. barathri MT2.1Te0
- Outcome
- no harmful effectse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“D. barathri MT2.1T showed no harmful effects on Caenorhabditis elegans, Daphnia magna, Eisenia foetida, and Escherichia coli MC4100 in biosafety tests”
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