Abstract
Bacterial wilt is a serious problem affecting many important food crops. Recent studies have indicated that treatment with biotic or abiotic stress factors may increase the resistance of plants to bacterial infection. This study investigated the effects of magnesium oxide nanoparticles (MgO NP ) on disease resistance in tomato plants against Ralstonia solanacearum , as well as its antibacterial activity. The roots of tomato seedlings were inoculated with R. solanacearum and then immediately treated with MgO NP ; the treated plants showed very little inhibition of bacterial wilt. In contrast, when roots were drenched with a MgO NP suspension prior to inoculation with the pathogen, the incidence of disease was significantly reduced. Rapid generation of reactive oxygen species such as O 2 −˙ radicals was observed in tomato roots treated with MgO NP . Further O 2 −˙ was rapidly generated when tomato plant extracts or polyphenols were added to the MgO NP suspension, suggesting that the generation of O 2 −˙ in tomato roots might be due to a reaction between MgO NP and polyphenols present in the roots. Salicylic acid‐inducible PR 1 , jasmonic acid‐inducible LoxA , ethylene‐inducible Osm , and systemic resistance‐related GluA were up‐regulated in both the roots and hypocotyls of tomato plants after treatment of the plant roots with MgO NP . Histochemical analyses showed that β ‐1,3‐glucanase and tyloses accumulated in the xylem and apoplast of pith tissues of the hypocotyls after MgO NP treatment. These results indicate that MgO NP induces systemic resistance in tomato plants against R. solanacearum .
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Claims 7
Claim · model-written summary
MgO nanoparticles applied immediately after inoculation provided very little inhibition of bacterial wilt.
Not reportedTaxonTreatmentComparator
Verbatim
e0“the treated plants showed very little inhibition of bacterial wilt.”
Claim · model-written summary
Pre-inoculation root drenching with MgO nanoparticles significantly reduced disease incidence.
Not reportedTaxonComparator
Verbatim
e0“when roots were drenched with a MgO NP suspension prior to inoculation with the pathogen, the incidence of disease was significantly reduced.”
Claim · model-written summary
MgO nanoparticle treatment rapidly generated reactive oxygen species in tomato roots.
- Taxon
- tomato
Solanum lycopersicume0 - Organ / stage
- rootse0
- Treatment
- MgO NPe0
- Outcome
- reactive oxygen speciese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Rapid generation of reactive oxygen species such as O 2 −˙ radicals was observed in tomato roots treated with MgO NP .”
Claim · model-written summary
Tomato extracts or polyphenols added to MgO nanoparticles rapidly generated further superoxide.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- tomato plant extracts or polyphenolse0
- Outcome
- O 2 −˙e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Further O 2 −˙ was rapidly generated when tomato plant extracts or polyphenols were added to the MgO NP suspension”
Claim · model-written summary
MgO nanoparticle treatment upregulated PR1, LoxA, Osm and GluA in tomato roots and hypocotyls.
- Taxon
- tomatoSolanum lycopersicume0
- Organ / stage
- roots and hypocotylse0
- Gene
- PR 1e0
- Outcome
- up‐regulatede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Salicylic acid‐inducible PR 1 , jasmonic acid‐inducible LoxA , ethylene‐inducible Osm , and systemic resistance‐related GluA were up‐regulated in both the roots and hypocotyls of tomato plants after treatment of the plant roots with MgO NP .”
Claim · model-written summary
Beta-1,3-glucanase and tyloses accumulated in hypocotyl xylem and apoplast after MgO nanoparticle treatment.
Not reportedTaxon
Verbatim
e0“Histochemical analyses showed that β ‐1,3‐glucanase and tyloses accumulated in the xylem and apoplast of pith tissues of the hypocotyls after MgO NP treatment.”
Claim · model-written summary
MgO nanoparticles induce systemic resistance in tomato against R. solanacearum.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- MgO NPe0
- Interactor
- R. solanacearum
Ralstonia solanacearume0 - Outcome
- systemic resistancee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“These results indicate that MgO NP induces systemic resistance in tomato plants against R. solanacearum .”
The same questions in other papers
nanoparticle · disease · Solanum lycopersicum (tomato)Positive and negative results
27 papers in the same direction as this paper · 1 in the opposite direction · 1 reporting no difference from an alternative
- no effect
- no effect
- positive
26 papers more in this group
See all 30 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.