Paper · 2024 · Journal of Scientific Research and Reports

Effect of Bio-Agents on Enzymatic Activity and Nematode Management in Tomato Plants Infected with Meloidogyne javanica

Raju Dhayal; B.S. Chandrawat; Kavita Choudhary; et al.

6
claims
10
verbatim quotes
0
citations
3
research areas
✓
Open access

Abstract

The tomato (Solanum esculentum Mill.) is one of the most widely cultivated vegetable crops worldwide. It serves as a favorable host for plant-parasitic nematodes, particularly the root-knot nematode (Meloidogyne javanica). Investigations were carried out to determine the effectiveness of bio-agents against root-knot nematodes in pot conditions. The bio-agents included Metarhizium anisopliae, Bacillus subtilis, Verticillium lecanii, Trichoderma harzianum and, Trichoderma asperellum) against root-knot nematode in pot condition. Effect of bio-agents was also estimated for accumulation of PPO and PAL and Root-knot nematode-infected tomato roots containing phenol. The results of the experiment showed that all the bio-agents significantly increased the levels of PPO, PAL, and phenol in tomato roots, improved plant growth parameters, and reduced nematode reproduction compared to the untreated control. The best treatment with the highest PPO, PAL, and phenol activity among the investigated bio-agents was determined to be Trichoderma harzianum at 3 gm/kg soil, followed by Bacillus subtilis and Metarhizium anisopliae. It improves the plant growth parameter and lowers the number of nematodes in the pot.

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Claims 6

Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

All bio-agents significantly increased PPO, PAL and phenol levels in tomato roots compared with the untreated control.

Organ / stage
rootse0
Treatment
bio-agentse0
Outcome
levels of PPO, PAL, and phenole0
Direction
increasede0
Comparator
untreated controle0

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

“all the bio-agents significantly increased the levels of PPO, PAL, and phenol in tomato roots, improved plant growth parameters, and reduced nematode reproduction compared to the untreated control”

✓ located verbatim in the source · abstract, characters 710–906 · show in text ↑
Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

All bio-agents significantly improved plant growth parameters of tomato compared with the untreated control.

Treatment
bio-agentse0
Outcome
plant growth parameterse0
Direction
improvede0
Comparator
untreated controle0

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

“all the bio-agents significantly increased the levels of PPO, PAL, and phenol in tomato roots, improved plant growth parameters, and reduced nematode reproduction compared to the untreated control”

✓ located verbatim in the source · abstract, characters 710–906 · show in text ↑
Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

All bio-agents significantly reduced Meloidogyne javanica reproduction on tomato compared with the untreated control.

Treatment
bio-agentse0
Interactor
Meloidogyne javanicaMeloidogyne javanicae1pest
Outcome
nematode reproductione0
Direction
reducede0
Comparator
untreated controle0

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

“all the bio-agents significantly increased the levels of PPO, PAL, and phenol in tomato roots, improved plant growth parameters, and reduced nematode reproduction compared to the untreated control”

✓ located verbatim in the source · abstract, characters 710–906 · show in text ↑
e1

“Meloidogyne javanica”

✓ located verbatim in the source · abstract, characters 200–220 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Trichoderma harzianum at 3 gm/kg soil gave the highest PPO, PAL and phenol activity among the bio-agents, followed by Bacillus subtilis and Metarhizium anisopliae.

Taxon
Tomato PlantsSolanum lycopersicumt0
Treatment
Trichoderma harzianum at 3 gm/kg soile0
Interactor
Trichoderma harzianumTrichoderma harzianume0biocontrol_agent
Outcome
highest PPO, PAL, and phenol activitye0
Direction
higheste0
Comparator
Bacillus subtilis and Metarhizium anisopliaee0

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 harzianum
Trichoderma harzianum · InteractorUS Department of Agriculture, Agricultural Research Service, Systematic Botany and Mycology Laboratory, [1] · Public domain · Wikimedia Commons ↗

Verbatim

e0

“The best treatment with the highest PPO, PAL, and phenol activity among the investigated bio-agents was determined to be Trichoderma harzianum at 3 gm/kg soil, followed by Bacillus subtilis and Metarhizium anisopliae”

✓ located verbatim in the source · abstract, characters 908–1124 · show in text ↑
t0

“Tomato Plants”

✓ located verbatim in the source · title, characters 70–83 · show in text ↑
Observationobservedoriginal resultpositivemeasured

Claim · model-written summary

The best treatment, Trichoderma harzianum, improved the plant growth parameter in the pots.

Taxon
Tomato PlantsSolanum lycopersicumt0
Outcome
plant growth parametere0
Direction
improvese0

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

“It improves the plant growth parameter and lowers the number of nematodes in the pot”

✓ located verbatim in the source · abstract, characters 1126–1210 · show in text ↑
t0

“Tomato Plants”

✓ located verbatim in the source · title, characters 70–83 · show in text ↑
Observationobservedoriginal resultpositivemeasured

Claim · model-written summary

The best treatment, Trichoderma harzianum, lowered the number of nematodes in the pots.

Taxon
Tomato PlantsSolanum lycopersicumt0
Outcome
number of nematodese0
Direction
lowerse0

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

“It improves the plant growth parameter and lowers the number of nematodes in the pot”

✓ located verbatim in the source · abstract, characters 1126–1210 · show in text ↑
t0

“Tomato Plants”

✓ located verbatim in the source · title, characters 70–83 · show in text ↑

Trichoderma harzianum · physiology: antioxidant enzymes · Solanum lycopersicum (tomato)Results agree

19 papers: 19 positive, 0 negative or no effect

18 papers in the same direction as this paper

  1. positive
  2. positive
  3. positive

15 papers more in this group

See all 19 papers →

biocontrol · Meloidogyne javanica · Solanum lycopersicum (tomato)Positive and negative results

8 papers: 6 positive, 2 negative or no effect

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

  1. negative
  2. negative
  3. positive

4 papers more in this group

See all 8 papers →

biocontrol · growth · Solanum lycopersicum (tomato)Positive and negative results

29 papers: 28 positive, 1 negative or no effect

27 papers in the same direction as this paper · 1 reporting no difference from an alternative

  1. no effect
  2. positive
  3. positive

25 papers more in this group

See all 29 papers →

biocontrol · physiology: antioxidant enzymes · Solanum lycopersicum (tomato)Results agree

7 papers: 7 positive, 0 negative or no effect

6 papers in the same direction as this paper

  1. positive
  2. positive
  3. positive

3 papers more in this group

See all 7 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.