Paper · 2024 · Egyptian Journal of Botany

Fungal Endophytes as Promising Antibacterial agents Against Ralstonia solanacearum, the Cause of Wilt Disease in Potato Plants

Mohamed S Attia; Essam A Soliman; Mennat-Allah El Dorry; et al.

11
claims
22
verbatim quotes
3
citations
3
research areas
✓
Open access

Abstract

All over the world, vegetable crops are suffering, including potato, which has been severely affected by bacterial wilt disease caused by Ralstonia solanacearum. Alternaria burnsii (A. burnsii), Aspergillus niger (A. niger), and Aspergillus niveus (A. niveus) are endophytic fungi that were isolated from Trifolium alexandrinum and were applied to enhance potato growth and stimulate defense mechanisms against Ralstonia solanacearum wilt (RSW) disease. The findings showed that the endophytic fungal filtrate possesses antibacterial activity against R. solanacearum in vitro, with inhibition zones for A. burnsii, A. niveus, and A. niger at concentrations of 1 mg/ml measuring 38.0 mm, 30.0 mm, and 28.0 mm in size. In pot trials, the mixture of A. burnsii, A. niveus, and A. niger was the most effective treatment. It reduced the disease index to 17.5% and provided 78.7% protection, followed by the use of A. niger and A. niveus, which reduced the disease index to 30% and 35%, respectively, and provided protection of 63.6% and 57.5%. Applying the fungal mixture to RSW-infected plants resulted in a 132.5% increase in soluble carbohydrates and a 94.3% increase in protein levels. The application of the endophytic fungi, singly or in combination, resulted in an increase in the phenolic content and the activities of antioxidant enzymes. Based on the study results, we recommend using a mixture of these tested endophytic fungi as therapeutic agents against RSW and as plant growth stimulants for commercial purposes.

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Claims 11

Observationobservedoriginal resultpositivemeasured

Claim · model-written summary

A. burnsii filtrate inhibited R. solanacearum in vitro, with an inhibition zone of 38.0 mm.

Interactor
R. solanacearumRalstonia solanacearume0pathogen
Second interactor
A. burnsiiAlternaria burnsiie0biocontrol_agent
Outcome
inhibition zonese0
Value
38.0 mme0
Setting
in vitroe0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Solanum tuberosum
Solanum tuberosum · TaxonScott Bauer, USDA ARS · Public domain · Wikimedia Commons ↗
Ralstonia solanacearum
Ralstonia solanacearum · InteractorClemson University - USDA Cooperative Extension Slide Series, Bugwood.org · Public domain · Wikimedia Commons ↗

Verbatim

e0

“The findings showed that the endophytic fungal filtrate possesses antibacterial activity against R. solanacearum in vitro, with inhibition zones for A. burnsii, A. niveus, and A. niger at concentrations of 1 mg/ml measuring 38.0 mm, 30.0 mm, and 28.0 mm in size.”

✓ located verbatim in the source · abstract, characters 454–716 · show in text ↑
t0

“Potato Plants”

✓ located verbatim in the source · title, characters 113–126 · show in text ↑
Observationobservedoriginal resultpositivemeasured

Claim · model-written summary

A. niveus filtrate inhibited R. solanacearum in vitro, with an inhibition zone of 30.0 mm.

Interactor
R. solanacearumRalstonia solanacearume0pathogen
Second interactor
A. niveusAspergillus niveuse0biocontrol_agent
Outcome
inhibition zonese0
Value
30.0 mme0
Setting
in vitroe0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Solanum tuberosum
Solanum tuberosum · TaxonScott Bauer, USDA ARS · Public domain · Wikimedia Commons ↗
Ralstonia solanacearum
Ralstonia solanacearum · InteractorClemson University - USDA Cooperative Extension Slide Series, Bugwood.org · Public domain · Wikimedia Commons ↗
Aspergillus niveus
Aspergillus niveus · Second interactorLine Ledsgaard Jensen, Mikael Rørdam Andersen, Ellen Kirstine Lyhne · Public domain · Wikimedia Commons ↗

Verbatim

e0

“The findings showed that the endophytic fungal filtrate possesses antibacterial activity against R. solanacearum in vitro, with inhibition zones for A. burnsii, A. niveus, and A. niger at concentrations of 1 mg/ml measuring 38.0 mm, 30.0 mm, and 28.0 mm in size.”

✓ located verbatim in the source · abstract, characters 454–716 · show in text ↑
t0

“Potato Plants”

✓ located verbatim in the source · title, characters 113–126 · show in text ↑
Observationobservedoriginal resultpositivemeasured

Claim · model-written summary

A. niger filtrate inhibited R. solanacearum in vitro, with an inhibition zone of 28.0 mm.

Interactor
R. solanacearumRalstonia solanacearume0pathogen
Second interactor
A. nigerAspergillus nigere0biocontrol_agent
Outcome
inhibition zonese0
Value
28.0 mme0
Setting
in vitroe0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Solanum tuberosum
Solanum tuberosum · TaxonScott Bauer, USDA ARS · Public domain · Wikimedia Commons ↗
Ralstonia solanacearum
Ralstonia solanacearum · InteractorClemson University - USDA Cooperative Extension Slide Series, Bugwood.org · Public domain · Wikimedia Commons ↗
Aspergillus niger
Aspergillus niger · Second interactorNo machine-readable author provided. Y tambe assumed (based on copyright claims). · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“The findings showed that the endophytic fungal filtrate possesses antibacterial activity against R. solanacearum in vitro, with inhibition zones for A. burnsii, A. niveus, and A. niger at concentrations of 1 mg/ml measuring 38.0 mm, 30.0 mm, and 28.0 mm in size.”

✓ located verbatim in the source · abstract, characters 454–716 · show in text ↑
t0

“Potato Plants”

✓ located verbatim in the source · title, characters 113–126 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

A. niger reduced potato disease index to 30%.

Treatment
A. nigere0
Interactor
A. nigerAspergillus nigere0biocontrol_agent
Outcome
disease indexe0
Direction
reducede0
Value
30%e0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Solanum tuberosum
Solanum tuberosum · TaxonScott Bauer, USDA ARS · Public domain · Wikimedia Commons ↗
Aspergillus niger
Aspergillus niger · InteractorNo machine-readable author provided. Y tambe assumed (based on copyright claims). · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“It reduced the disease index to 17.5% and provided 78.7% protection, followed by the use of A. niger and A. niveus, which reduced the disease index to 30% and 35%, respectively, and provided protection of 63.6% and 57.5%.”

✓ located verbatim in the source · abstract, characters 817–1038 · show in text ↑
t0

“Potato Plants”

✓ located verbatim in the source · title, characters 113–126 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

A. niger provided 63.6% potato protection.

Treatment
A. nigere0
Interactor
A. nigerAspergillus nigere0biocontrol_agent
Outcome
protectione0
Value
63.6%e0

Not reportedComparatorDirection

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Solanum tuberosum
Solanum tuberosum · TaxonScott Bauer, USDA ARS · Public domain · Wikimedia Commons ↗
Aspergillus niger
Aspergillus niger · InteractorNo machine-readable author provided. Y tambe assumed (based on copyright claims). · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“It reduced the disease index to 17.5% and provided 78.7% protection, followed by the use of A. niger and A. niveus, which reduced the disease index to 30% and 35%, respectively, and provided protection of 63.6% and 57.5%.”

✓ located verbatim in the source · abstract, characters 817–1038 · show in text ↑
t0

“Potato Plants”

✓ located verbatim in the source · title, characters 113–126 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

A. niveus reduced potato disease index to 35%.

Treatment
A. niveuse0
Interactor
A. niveusAspergillus niveuse0biocontrol_agent
Outcome
disease indexe0
Direction
reducede0
Value
35%e0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Solanum tuberosum
Solanum tuberosum · TaxonScott Bauer, USDA ARS · Public domain · Wikimedia Commons ↗
Aspergillus niveus
Aspergillus niveus · InteractorLine Ledsgaard Jensen, Mikael Rørdam Andersen, Ellen Kirstine Lyhne · Public domain · Wikimedia Commons ↗

Verbatim

e0

“It reduced the disease index to 17.5% and provided 78.7% protection, followed by the use of A. niger and A. niveus, which reduced the disease index to 30% and 35%, respectively, and provided protection of 63.6% and 57.5%.”

✓ located verbatim in the source · abstract, characters 817–1038 · show in text ↑
t0

“Potato Plants”

✓ located verbatim in the source · title, characters 113–126 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

A. niveus provided 57.5% potato protection.

Treatment
A. niveuse0
Interactor
A. niveusAspergillus niveuse0biocontrol_agent
Outcome
protectione0
Value
57.5%e0

Not reportedComparatorDirection

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Solanum tuberosum
Solanum tuberosum · TaxonScott Bauer, USDA ARS · Public domain · Wikimedia Commons ↗
Aspergillus niveus
Aspergillus niveus · InteractorLine Ledsgaard Jensen, Mikael Rørdam Andersen, Ellen Kirstine Lyhne · Public domain · Wikimedia Commons ↗

Verbatim

e0

“It reduced the disease index to 17.5% and provided 78.7% protection, followed by the use of A. niger and A. niveus, which reduced the disease index to 30% and 35%, respectively, and provided protection of 63.6% and 57.5%.”

✓ located verbatim in the source · abstract, characters 817–1038 · show in text ↑
t0

“Potato Plants”

✓ located verbatim in the source · title, characters 113–126 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Fungal mixture treatment increased potato soluble carbohydrates by 132.5% in infected plants.

Treatment
fungal mixturee0
Outcome
soluble carbohydratese0
Direction
increasee0
Value
132.5%e0
Qualifier
RSW-infected plantse0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Solanum tuberosum
Solanum tuberosum · TaxonScott Bauer, USDA ARS · Public domain · Wikimedia Commons ↗

Verbatim

e0

“Applying the fungal mixture to RSW-infected plants resulted in a 132.5% increase in soluble carbohydrates and a 94.3% increase in protein levels.”

✓ located verbatim in the source · abstract, characters 1039–1184 · show in text ↑
t0

“Potato Plants”

✓ located verbatim in the source · title, characters 113–126 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Fungal mixture treatment increased potato protein levels by 94.3% in infected plants.

Treatment
fungal mixturee0
Outcome
protein levelse0
Direction
increasee0
Value
94.3%e0
Qualifier
RSW-infected plantse0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Solanum tuberosum
Solanum tuberosum · TaxonScott Bauer, USDA ARS · Public domain · Wikimedia Commons ↗

Verbatim

e0

“Applying the fungal mixture to RSW-infected plants resulted in a 132.5% increase in soluble carbohydrates and a 94.3% increase in protein levels.”

✓ located verbatim in the source · abstract, characters 1039–1184 · show in text ↑
t0

“Potato Plants”

✓ located verbatim in the source · title, characters 113–126 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Endophytic fungi increased potato phenolic content and antioxidant enzyme activities.

Treatment
endophytic fungi, singly or in combinatione0
Outcome
phenolic content and the activities of antioxidant enzymese0
Direction
increasee0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Solanum tuberosum
Solanum tuberosum · TaxonScott Bauer, USDA ARS · Public domain · Wikimedia Commons ↗

Verbatim

e0

“The application of the endophytic fungi, singly or in combination, resulted in an increase in the phenolic content and the activities of antioxidant enzymes.”

✓ located verbatim in the source · abstract, characters 1185–1342 · show in text ↑
t0

“Potato Plants”

✓ located verbatim in the source · title, characters 113–126 · show in text ↑
Recommendationauthor interpretationoriginal resultbasis n/a

Claim · model-written summary

The authors recommend the fungal mixture for potato wilt management and growth stimulation.

Outcome
using a mixture of these tested endophytic fungi as therapeutic agents against RSW and as plant growth stimulantse0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Solanum tuberosum
Solanum tuberosum · TaxonScott Bauer, USDA ARS · Public domain · Wikimedia Commons ↗

Verbatim

e0

“Based on the study results, we recommend using a mixture of these tested endophytic fungi as therapeutic agents against RSW and as plant growth stimulants for commercial purposes.”

✓ located verbatim in the source · abstract, characters 1343–1522 · show in text ↑
t0

“Potato Plants”

✓ located verbatim in the source · title, characters 113–126 · show in text ↑