Abstract
Pectobacterium carotovorum ( Pcc ) is the causative organism of bacterial soft rot disease, one of the most hazardous diseases affecting Colocasia esculenta (L.) Schott. Currently, chemical fungicides are still useful in controlling soft rot disease, but their constant usage not only makes bacteria more resistant but also poses risks to the ecosystem. Plant growth-promoting rhizobacteria (PGPRs), however, provide an alternative for disease control and sustainable development. In this investigation, we obtained an isolate of Bacillus velezensis (TX2) from the soil of the taro rhizosphere. In C. esculenta , TX2 root-irrigation was then shown to stimulate auxin production and plant growth. More interestingly, it was discovered that taro developed resistance to Pcc following this TX2 root-irrigation treatment. Through whole genome sequencing, we found 13 homologous genes related to biosynthesis of plant growth-promoting and resistant secondary metabolite. Furthermore, TX2 application was confirmed to enhance the expression of resistant marker genes PDF1.2, PR1 and PR2 by transcriptomic analysis as well as qRT-PCR verification. The concentrations of JA, JA-Ile, and SA were also raised significantly in taro plants with the application of TX2. Collectively, our results showed that TX2 enhances taro plant resistance to soft rot by strengthening the SA and JA pathways and may serve as a promising biocontrol agent.
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Claims 5
Claim · model-written summary
Root-irrigation with TX2 stimulated auxin production and plant growth in taro.
- Taxon
- C. esculenta
_Colocasia_esculenta_-_Les_Martels%2C_Giroussens_Tarn.jpg?width=60)
Colocasia esculentae0 - Treatment
- TX2 root-irrigatione0
- Interactor
- TX2e0symbiont
- Outcome
- auxin production and plant growthe0
- Direction
- stimulatee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Colocasia_esculenta_-_Les_Martels%2C_Giroussens_Tarn.jpg?width=500)
Verbatim
e0“In C. esculenta , TX2 root-irrigation was then shown to stimulate auxin production and plant growth”
Claim · model-written summary
Taro developed resistance to Pectobacterium carotovorum following TX2 root-irrigation.
- Taxon
- taroColocasia esculentae2
- Treatment
- TX2 root-irrigatione2
- Interactor
- Pectobacterium carotovorum
Pectobacterium carotovorume1pathogen - Second interactor
- TX2e2biocontrol_agent
- Outcome
- resistance to Pcce2
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Pectobacterium carotovorum ( Pcc ) is the causative organism of bacterial soft rot disease”
e2“it was discovered that taro developed resistance to Pcc following this TX2 root-irrigation treatment”
Claim · model-written summary
TX2 application enhanced the expression of resistance marker genes PDF1.2, PR1 and PR2 in taro.
- Taxon
- C. esculentaColocasia esculentae0
- Treatment
- TX2 applicatione3
- Interactor
- TX2e3symbiont
- Gene
- PDF1.2, PR1 and PR2e3
- Outcome
- expression of resistant marker genese3
- Direction
- enhancee3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In C. esculenta , TX2 root-irrigation was then shown to stimulate auxin production and plant growth”
e3“TX2 application was confirmed to enhance the expression of resistant marker genes PDF1.2, PR1 and PR2 by transcriptomic analysis as well as qRT-PCR verification”
Claim · model-written summary
Application of TX2 significantly raised the concentrations of JA, JA-Ile and SA in taro.
- Taxon
- taroColocasia esculentae4
- Treatment
- application of TX2e4
- Interactor
- TX2e4symbiont
- Outcome
- concentrations of JA, JA-Ile, and SAe4
- Direction
- raisede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“The concentrations of JA, JA-Ile, and SA were also raised significantly in taro plants with the application of TX2”
Claim · model-written summary
Whole genome sequencing of TX2 found 13 homologous genes related to biosynthesis of plant growth-promoting and resistant secondary metabolites.
- Taxon
- C. esculentaColocasia esculentae0
- Outcome
- homologous genes related to biosynthesis of plant growth-promoting and resistant secondary metabolitee5
- Value
- 13e5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In C. esculenta , TX2 root-irrigation was then shown to stimulate auxin production and plant growth”
e5“Through whole genome sequencing, we found 13 homologous genes related to biosynthesis of plant growth-promoting and resistant secondary metabolite”