Abstract
Infections of agricultural crops caused by pathogen ic fungi are among the most widespread and harmful, as they not only reduce the quantity of the harvest but also significantly deteriorate its quality. This study aims to develop unique seed-coating formulations incorporating biopolymers (polyhydroxyalkanoate and pullulan) and beneficial microorganisms for plant protection against phytopathogens. A microbial association of biocompatible endophytic bacteria has been created, including Pseudomonas flavescens D5, Bacillus aerophilus A2, Serratia proteamaculans B5, and Pseudomonas putida D7. These strains exhibited agronomically valuable properties: synthesis of the phytohormone IAA (from 45.2 to 69.2 µg mL−1), antagonistic activity against Fusarium oxysporum and Fusarium solani (growth inhibition zones from 1.8 to 3.0 cm), halotolerance (5–15% NaCl), and PHA production (2.77–4.54 g L−1). A pullulan synthesized by Aureobasidium pullulans C7 showed a low viscosity rate (from 395 Pa·s to 598 Pa·s) depending on the concentration of polysaccharide solutions. Therefore, at 8.0%, w/v concentration, viscosity virtually remained unchanged with increasing shear rate, indicating that it exhibits Newtonian flow behavior. The effectiveness of various antifungal seed coating formulations has been demonstrated to enhance the tolerance of barley plants to phytopathogens.
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Claims 7
Claim · model-written summary
The endophytic bacteria synthesized IAA at 45.2 to 69.2 µg mL−1.
- Taxon
- barley
.jpg?width=60)
Hordeum vulgaret0 - Interactor
- endophytic bacteriae0symbiont
- Outcome
- synthesis of the phytohormone IAAe1
- Value
- 45.2 to 69.2 µg mL−1e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
t0“Tolerance of Barley to Phytopathogens”
e0“A microbial association of biocompatible endophytic bacteria has been created, including Pseudomonas flavescens D5, Bacillus aerophilus A2, Serratia proteamaculans B5, and Pseudomonas putida D7”
e1“synthesis of the phytohormone IAA (from 45.2 to 69.2 µg mL−1)”
Claim · model-written summary
The endophytic bacteria inhibited Fusarium oxysporum and Fusarium solani growth with inhibition zones of 1.8 to 3.0 cm.
- Taxon
- barleyHordeum vulgaret0
- Interactor
- Fusarium oxysporum and Fusarium solani
_(Fusarium_oxysporum_f.sp._batatas)_1234227-PPT-Clemson_University.jpg?width=60)
Fusarium oxysporum_Sacc._5393379.jpg?width=60)
Fusarium solanie2pathogen - Second interactor
- endophytic bacteriae0biocontrol_agent
- Outcome
- growth inhibition zonese2
- Value
- 1.8 to 3.0 cme2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_(Fusarium_oxysporum_f.sp._batatas)_1234227-PPT-Clemson_University.jpg?width=500)
_Sacc._5393379.jpg?width=500)
Verbatim
t0“Tolerance of Barley to Phytopathogens”
e0“A microbial association of biocompatible endophytic bacteria has been created, including Pseudomonas flavescens D5, Bacillus aerophilus A2, Serratia proteamaculans B5, and Pseudomonas putida D7”
e2“antagonistic activity against Fusarium oxysporum and Fusarium solani (growth inhibition zones from 1.8 to 3.0 cm)”
Claim · model-written summary
The endophytic bacteria showed halotolerance of 5–15% NaCl.
- Taxon
- barleyHordeum vulgaret0
- Interactor
- endophytic bacteriae0symbiont
- Outcome
- halotolerancee3
- Value
- 5–15% NaCle3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tolerance of Barley to Phytopathogens”
e0“A microbial association of biocompatible endophytic bacteria has been created, including Pseudomonas flavescens D5, Bacillus aerophilus A2, Serratia proteamaculans B5, and Pseudomonas putida D7”
e3“halotolerance (5–15% NaCl)”
Claim · model-written summary
The endophytic bacteria produced PHA at 2.77–4.54 g L−1.
- Taxon
- barleyHordeum vulgaret0
- Interactor
- endophytic bacteriae0symbiont
- Outcome
- PHA productione4
- Value
- 2.77–4.54 g L−1e4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tolerance of Barley to Phytopathogens”
e0“A microbial association of biocompatible endophytic bacteria has been created, including Pseudomonas flavescens D5, Bacillus aerophilus A2, Serratia proteamaculans B5, and Pseudomonas putida D7”
e4“PHA production (2.77–4.54 g L−1)”
Claim · model-written summary
The pullulan synthesized by Aureobasidium pullulans C7 showed a low viscosity rate of 395 to 598 Pa·s, depending on polysaccharide concentration.
- Material
- pullulane5
- Outcome
- viscosity ratee5
- Value
- from 395 Pa·s to 598 Pa·se5
- Qualifier
- depending on the concentration of polysaccharide solutionse5
Not reportedTaxon
Verbatim
e5“A pullulan synthesized by Aureobasidium pullulans C7 showed a low viscosity rate (from 395 Pa·s to 598 Pa·s) depending on the concentration of polysaccharide solutions”
Claim · model-written summary
At 8.0% w/v the pullulan viscosity remained virtually unchanged with increasing shear rate, indicating Newtonian flow.
- Outcome
- viscosity virtually remained unchanged with increasing shear ratee6
- Qualifier
- at 8.0%, w/v concentratione6
Not reportedTaxon
Verbatim
e6“at 8.0%, w/v concentration, viscosity virtually remained unchanged with increasing shear rate, indicating that it exhibits Newtonian flow behavior”
Claim · model-written summary
Antifungal seed coating formulations enhanced the tolerance of barley plants to phytopathogens.
- Taxon
- barleyHordeum vulgaret0
- Treatment
- antifungal seed coating formulationse7
- Interactor
- phytopathogense7pathogen
- Outcome
- tolerance of barley plants to phytopathogense7
- Direction
- enhancee7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tolerance of Barley to Phytopathogens”
e7“The effectiveness of various antifungal seed coating formulations has been demonstrated to enhance the tolerance of barley plants to phytopathogens”
The same questions in other papers
antifungal agent · disease · Hordeum vulgare (barley)Results agree
1 paper in the same direction as this paper
- positive
seed treatment · disease · Hordeum vulgare (barley)Positive and negative results
13 papers in the same direction as this paper · 2 in the opposite direction
- negative
- no effect
- positive
12 papers more in this group
See all 16 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.