Abstract
Bacterial fruit blotch (BFB), caused by the seed-transmitted pathogen Acidovorax citrulli , poses a serious threat to cucurbitaceous crops worldwide. In this study, two biocontrol bacteria strains, Bacillus amyloliquefaciens (Ba- 2) and Pseudomonas fluorescens (2P24), with significant antagonistic activity against A. citrulli were and applied by seed priming to control BFB seed transmission. Artificially infested watermelon and melon seeds were treated with the biocontrol strains by liquid or solid matrix seed priming. The seed bio-priming effects were evaluated under greenhouse conditions. Germination percentages were improved by seed priming treatments for melon, and seedling uniformity was higher for seeds primed with Ba-2 than for seeds from the other treatments for watermelon. Seedling disease incidence of untreated seeds were 6.5% for watermelon and 16.0% for melon, and water-priming resulted in similar disease progress curves as the untreated control. Seed priming with Ba-2 and 2P24 significantly reduced seedling BFB incidence for both watermelon and melon. Evaluation with naturally infested watermelon seeds primed with biocontrol strains indicated that 2P24 seed priming was more effective than Ba-2 ( P < 0.05) and 2P24 solid matrix priming, reducing the seedling disease incidence to 1.3%. Seed bio-priming has potential as an effective and eco-friendly approach for suppressing bacterial fruit blotch seed-to-seedling transmission.
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Claims 10
Claim · model-written summary
The two biocontrol strains had significant antagonistic activity against Acidovorax citrulli.
- Taxon
- cucurbitaceous cropse1
- Interactor
- A. citrulliParacidovorax citrullie0pathogen
- Second interactor
- Bacillus amyloliquefaciens
.jpg?width=60)
Bacillus amyloliquefaciense0biocontrol_agent - Outcome
- antagonistic activitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Bacillus amyloliquefaciens (Ba- 2) and Pseudomonas fluorescens (2P24), with significant antagonistic activity against A. citrulli”
e1“cucurbitaceous crops”
Claim · model-written summary
Seed priming improved melon germination percentage.
- Taxon
- melon
.jpg?width=60)
Cucumis meloe0 - Treatment
- seed priming treatmentse0
- Outcome
- Germination percentagese0
- Direction
- improvede0
- Comparator
- untreated seedse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Germination percentages were improved by seed priming treatments for melon”
e1“untreated seeds”
Claim · model-written summary
Ba-2 priming gave watermelon seedlings greater uniformity than other treatments.
- Taxon
- watermelon
Citrullus lanatuse0 - Treatment
- seeds primed with Ba-2e0
- Interactor
- Ba-2e0biocontrol_agent
- Outcome
- seedling uniformitye0
- Direction
- highere0
- Comparator
- seeds from the other treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“seedling uniformity was higher for seeds primed with Ba-2 than for seeds from the other treatments for watermelon”
Claim · model-written summary
Untreated watermelon seeds had 6.5% seedling disease incidence.
- Taxon
- watermelonCitrullus lanatuse0
- Interactor
- Acidovorax citrulliParacidovorax citrullie1pathogen
- Outcome
- Seedling disease incidencee0
- Value
- 6.5%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seedling disease incidence of untreated seeds were 6.5% for watermelon”
e1“Bacterial fruit blotch (BFB), caused by the seed-transmitted pathogen Acidovorax citrulli”
Claim · model-written summary
Untreated melon seeds had 16.0% seedling disease incidence.
- Taxon
- melonCucumis meloe0
- Interactor
- Acidovorax citrulliParacidovorax citrullie2pathogen
- Outcome
- Seedling disease incidencee1
- Value
- 16.0%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“16.0% for melon”
e1“Seedling disease incidence of untreated seeds”
e2“Acidovorax citrulli”
Claim · model-written summary
Water priming produced disease progress curves similar to untreated controls.
- Taxon
- watermelon and melonCitrullus lanatusCucumis meloe1
- Treatment
- water-priminge0
- Outcome
- disease progress curvese0
- Direction
- similare0
- Comparator
- untreated controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“water-priming resulted in similar disease progress curves as the untreated control”
e1“watermelon and melon seeds”
Claim · model-written summary
Ba-2 priming significantly reduced watermelon seedling BFB incidence.
- Taxon
- watermelonCitrullus lanatuse0
- Treatment
- Seed priming with Ba-2e0
- Interactor
- Ba-2e0biocontrol_agent
- Outcome
- seedling BFB incidencee0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seed priming with Ba-2 and 2P24 significantly reduced seedling BFB incidence for both watermelon and melon”
Claim · model-written summary
2P24 priming significantly reduced melon seedling BFB incidence.
- Taxon
- melonCucumis meloe0
- Treatment
- 2P24e0
- Interactor
- 2P24e0biocontrol_agent
- Outcome
- seedling BFB incidencee0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seed priming with Ba-2 and 2P24 significantly reduced seedling BFB incidence for both watermelon and melon”
Claim · model-written summary
2P24 priming outperformed Ba-2 on naturally infested watermelon seeds.
- Taxon
- watermelonCitrullus lanatuse0
- Treatment
- 2P24 seed priminge0
- Outcome
- more effectivee0
- Direction
- more effectivee0
- Comparator
- Ba-2e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“naturally infested watermelon seeds primed with biocontrol strains indicated that 2P24 seed priming was more effective than Ba-2 ( P < 0.05)”
Claim · model-written summary
2P24 priming reduced watermelon seedling disease incidence to 1.3%.
- Taxon
- watermelonCitrullus lanatuse1
- Treatment
- 2P24 solid matrix priminge0
- Outcome
- seedling disease incidencee0
- Direction
- reducinge0
- Value
- 1.3%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“2P24 solid matrix priming, reducing the seedling disease incidence to 1.3%”
e1“naturally infested watermelon seeds”
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See all 8 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.