Paper · 2020 · Egyptian Journal of Biological Pest Control

Efficacy of indigenous plant growth-promoting rhizobacteria and Trichoderma strains in eliciting resistance against bacterial wilt in a tomato

Narasimhamurthy Konappa; Soumya Krishnamurthy; Udayashankar C. Arakere; et al.

9
claims
18
verbatim quotes
61
citations
2
research areas
✓
Open access · cc-by

Abstract

Abstract Bacterial wilt of tomato caused by Ralstonia solanacearum is a serious threat to tomato production worldwide. For eco-friendly management of bacterial wilt of tomato, the rhizospheric microorganisms belonging to the genera Bacillus (6 isolates), Brevibacillus (1 isolate), Pseudomonas (3 isolates), and Trichoderma (8 isolates) were studied for their ability to induce innate immunity in tomato, individually and in combination against R. solanacearum in greenhouse and field studies. In laboratory studies, maximum germination percent of 93%, vigor index of 1609 was noted in seed bacterization with P. fluorescens Pf3, followed by 91% germination, vigor index of 1593 in treatment with T. asperellum T8 over control. Under greenhouse conditions, protection against bacterial wilt in individual treatments with PGPRs ranged from 38 to 43% and Trichoderma sp. ranged from 39 to 43% in comparison to control. In comparison to individual seed treatment, among different combinations, maximum seed germination percent of 97% was recorded with combination P. fluorescens Pf3 + T. longibrachiatum UNS11. In greenhouse studies’ combination seed treatment with P. fluorescens Pf3 + T. longibrachiatum UNS11 offered an impressive 62% protection against bacterial wilt over control. Similarly, under field conditions, seed treatment with P. fluorescens Pf3 + T. longibrachiatum UNS11 resulted in 61% protection. The innate immunity triggered by eco-friendly seed treatment was analyzed by expression to defense-related enzymes such as peroxidase, phenylalanine ammonialyase, and polyphenol oxidase in comparison to control. This study indicated that the potential benefits of using combination treatments of beneficial microorganisms in effectively inducing resistance are possible for dual benefits of enhanced plant growth, tomato yield, and pathogen suppression.

Abstract from the paper’s OpenAlex record; open copy licensed cc-by. Read at the source ↗

The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.

Claims 9

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

P. fluorescens Pf3 seed bacterization produced 93% germination.

Treatment
seed bacterization with P. fluorescens Pf3e0
Interactor
P. fluorescens Pf3Pseudomonas fluorescense0symbiont
Outcome
germination percente0
Direction
maximume0
Value
93%e0

Not reportedComparator

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

Solanum lycopersicum
Solanum lycopersicum · TaxonKod B · CC BY-SA 4.0 · Wikimedia Commons ↗
Pseudomonas fluorescens
Pseudomonas fluorescens · InteractorNinjatacoshell · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“maximum germination percent of 93%, vigor index of 1609 was noted in seed bacterization with P. fluorescens Pf3”

✓ located verbatim in the source · abstract, characters 517–628 · show in text ↑
t0

“tomato”

✓ located verbatim in the source · title, characters 136–142 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

P. fluorescens Pf3 seed bacterization produced a vigor index of 1609.

Treatment
seed bacterization with P. fluorescens Pf3e0
Interactor
P. fluorescens Pf3Pseudomonas fluorescense0symbiont
Outcome
vigor indexe0
Value
1609e0

Not reportedComparatorDirection

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

Solanum lycopersicum
Solanum lycopersicum · TaxonKod B · CC BY-SA 4.0 · Wikimedia Commons ↗
Pseudomonas fluorescens
Pseudomonas fluorescens · InteractorNinjatacoshell · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“maximum germination percent of 93%, vigor index of 1609 was noted in seed bacterization with P. fluorescens Pf3”

✓ located verbatim in the source · abstract, characters 517–628 · show in text ↑
t0

“tomato”

✓ located verbatim in the source · title, characters 136–142 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

T. asperellum T8 treatment produced 91% germination.

Treatment
treatment with T. asperellum T8e0
Interactor
T. asperellum T8Trichoderma asperellume0symbiont
Outcome
germinatione0
Value
91%e0
Comparator
controle0

Not reportedDirection

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

Solanum lycopersicum
Solanum lycopersicum · TaxonKod B · CC BY-SA 4.0 · Wikimedia Commons ↗
Trichoderma asperellum
Trichoderma asperellum · InteractorTashkoskip · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“followed by 91% germination, vigor index of 1593 in treatment with T. asperellum T8 over control”

✓ located verbatim in the source · abstract, characters 630–726 · show in text ↑
t0

“tomato”

✓ located verbatim in the source · title, characters 136–142 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

T. asperellum T8 treatment produced a vigor index of 1593.

Treatment
treatment with T. asperellum T8e0
Interactor
T. asperellum T8Trichoderma asperellume0symbiont
Outcome
vigor indexe0
Value
1593e0
Comparator
controle0

Not reportedDirection

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

Solanum lycopersicum
Solanum lycopersicum · TaxonKod B · CC BY-SA 4.0 · Wikimedia Commons ↗
Trichoderma asperellum
Trichoderma asperellum · InteractorTashkoskip · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“followed by 91% germination, vigor index of 1593 in treatment with T. asperellum T8 over control”

✓ located verbatim in the source · abstract, characters 630–726 · show in text ↑
t0

“tomato”

✓ located verbatim in the source · title, characters 136–142 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Individual PGPR treatments gave 38 to 43% protection against bacterial wilt in greenhouse conditions.

Treatment
individual treatments with PGPRse0
Interactor
bacterial wilte0pathogen
Outcome
protection against bacterial wilte0
Value
38 to 43%e0
Comparator
controle0
Setting
greenhouse conditionse0

Not reportedDirection

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

Solanum lycopersicum
Solanum lycopersicum · TaxonKod B · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“Under greenhouse conditions, protection against bacterial wilt in individual treatments with PGPRs ranged from 38 to 43% and Trichoderma sp. ranged from 39 to 43% in comparison to control.”

✓ located verbatim in the source · abstract, characters 728–916 · show in text ↑
t0

“tomato”

✓ located verbatim in the source · title, characters 136–142 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Individual Trichoderma treatments gave 39 to 43% protection against bacterial wilt in greenhouse conditions.

Treatment
Trichoderma sp.e0
Interactor
Trichoderma sp.Trichodermae0biocontrol_agent
Outcome
protection against bacterial wilte0
Value
39 to 43%e0
Comparator
controle0
Setting
greenhouse conditionse0

Not reportedDirection

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

Solanum lycopersicum
Solanum lycopersicum · TaxonKod B · CC BY-SA 4.0 · Wikimedia Commons ↗
Trichoderma
Trichoderma · Interactor · picture of the genus (one of its species)US Department of Agriculture, Agricultural Research Service, Systematic Botany and Mycology Laboratory, [1] · Public domain · Wikimedia Commons ↗

Verbatim

e0

“Under greenhouse conditions, protection against bacterial wilt in individual treatments with PGPRs ranged from 38 to 43% and Trichoderma sp. ranged from 39 to 43% in comparison to control.”

✓ located verbatim in the source · abstract, characters 728–916 · show in text ↑
t0

“tomato”

✓ located verbatim in the source · title, characters 136–142 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Combined P. fluorescens Pf3 and T. longibrachiatum UNS11 produced maximum seed germination of 97%.

Treatment
combination P. fluorescens Pf3 + T. longibrachiatum UNS11e0
Interactor
P. fluorescens Pf3Pseudomonas fluorescense0symbiont
Second interactor
T. longibrachiatum UNS11Trichoderma longibrachiatume0symbiont
Outcome
seed germination percente0
Direction
maximume0
Value
97%e0
Comparator
individual seed treatmente0

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

Solanum lycopersicum
Solanum lycopersicum · TaxonKod B · CC BY-SA 4.0 · Wikimedia Commons ↗
Pseudomonas fluorescens
Pseudomonas fluorescens · InteractorNinjatacoshell · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“In comparison to individual seed treatment, among different combinations, maximum seed germination percent of 97% was recorded with combination P. fluorescens Pf3 + T. longibrachiatum UNS11.”

✓ located verbatim in the source · abstract, characters 917–1107 · show in text ↑
t0

“tomato”

✓ located verbatim in the source · title, characters 136–142 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Combined seed treatment gave 62% protection against bacterial wilt in greenhouse studies.

Treatment
combination seed treatment with P. fluorescens Pf3 + T. longibrachiatum UNS11e0
Interactor
P. fluorescens Pf3Pseudomonas fluorescense0symbiont
Second interactor
T. longibrachiatum UNS11Trichoderma longibrachiatume0biocontrol_agent
Outcome
protection against bacterial wilte0
Value
62%e0
Comparator
controle0
Setting
greenhouse studiese0

Not reportedDirection

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

Solanum lycopersicum
Solanum lycopersicum · TaxonKod B · CC BY-SA 4.0 · Wikimedia Commons ↗
Pseudomonas fluorescens
Pseudomonas fluorescens · InteractorNinjatacoshell · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“In greenhouse studies’ combination seed treatment with P. fluorescens Pf3 + T. longibrachiatum UNS11 offered an impressive 62% protection against bacterial wilt over control.”

✓ located verbatim in the source · abstract, characters 1108–1282 · show in text ↑
t0

“tomato”

✓ located verbatim in the source · title, characters 136–142 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Combined seed treatment gave 61% protection against bacterial wilt in field conditions.

Treatment
seed treatment with P. fluorescens Pf3 + T. longibrachiatum UNS11e0
Interactor
P. fluorescens Pf3Pseudomonas fluorescense0symbiont
Second interactor
T. longibrachiatum UNS11Trichoderma longibrachiatume0biocontrol_agent
Outcome
protectione0
Value
61%e0
Setting
field conditionse0

Not reportedComparatorDirection

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

Solanum lycopersicum
Solanum lycopersicum · TaxonKod B · CC BY-SA 4.0 · Wikimedia Commons ↗
Pseudomonas fluorescens
Pseudomonas fluorescens · InteractorNinjatacoshell · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“under field conditions, seed treatment with P. fluorescens Pf3 + T. longibrachiatum UNS11 resulted in 61% protection”

✓ located verbatim in the source · abstract, characters 1294–1410 · show in text ↑
t0

“tomato”

✓ located verbatim in the source · title, characters 136–142 · show in text ↑

Trichoderma longibrachiatum · disease · Solanum lycopersicum (tomato)Positive and negative results

3 papers: 2 positive, 1 negative or no effect

1 paper in the same direction as this paper · 1 in the opposite direction

  1. negative
  2. positive
See all 3 papers →

Trichoderma longibrachiatum · growth · Solanum lycopersicum (tomato)Positive and negative results

4 papers: 3 positive, 1 negative or no effect

2 papers in the same direction as this paper · 1 in the opposite direction

  1. negative
  2. positive
  3. positive
See all 4 papers →

Pseudomonas fluorescens · disease · Solanum lycopersicum (tomato)Positive and negative results

20 papers: 19 positive, 1 negative or no effect

18 papers in the same direction as this paper · 1 in the opposite direction

  1. positive
  2. no effect
  3. positive

16 papers more in this group

See all 20 papers →

Trichoderma · disease · Solanum lycopersicum (tomato)Positive and negative results

27 papers: 25 positive, 2 negative or no effect

24 papers in the same direction as this paper · 2 in the opposite direction

  1. negative
  2. negative
  3. positive

23 papers more in this group

See all 27 papers →

Pseudomonas fluorescens · growth · Solanum lycopersicum (tomato)Positive and negative results

36 papers: 34 positive, 2 negative or no effect

33 papers in the same direction as this paper · 2 in the opposite direction

  1. positive
  2. no effect
  3. no effect

32 papers more in this group

See all 36 papers →

Pseudomonas fluorescens · control · Solanum lycopersicum (tomato)Results agree

2 papers: 2 positive, 0 negative or no effect

1 paper in the same direction as this paper

  1. positive
See all 2 papers →

Trichoderma asperellum · growth · Solanum lycopersicum (tomato)Results agree

16 papers: 16 positive, 0 negative or no effect

15 papers in the same direction as this paper

  1. positive
  2. positive
  3. positive

12 papers more in this group

See all 16 papers →

seed treatment · disease · Solanum lycopersicum (tomato)Positive and negative results

40 papers: 37 positive, 3 negative or no effect

36 papers in the same direction as this paper · 3 in the opposite direction

  1. negative
  2. no effect
  3. negative

36 papers more in this group

See all 40 papers →

8 of 9 groups shown: named compounds and organisms first, then groups whose results differ (checked claim by claim), then those with positive and negative results, then the smaller groups.

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.