Abstract
In recent years, interest in using encapsulated plant growth-promoting rhizobacteria (PGPR) as a biocontrol agent against root-knot nematodes has increased. Root-knot nematodes are soil-borne parasites that mostly cause annual commercial losses globally by infecting tomato plants (Solanum lycopersicum). In this work, tomato plants (cv. GS) were grown in a greenhouse to test the effectiveness of encapsulated Bacillus megaterium with or without humic acid or in liquid form at different inoculum levels against Meloidogyne javanica and their impact on different growth parameters. A scanning electron microscope (SEM) was used to visualize the microencapsulation of B. megaterium as well as viability and protease production In vitro. In a greenhouse experiment, humic acid-encapsulated B. megaterium resulted in a significant decrease in nematode parameters compared to the control group. When compared to other inoculants, the use of 10 capsules/plant decreased nematode infestation and enhanced plant growth parameters, antioxidant enzymes, and photosynthetic pigments. These results are reflected in increased dehydrogenase activity, total bacterial count, and acidic and alkaline phosphatase in soil 30 and 60 days after transplanting. Therefore, to increase the development dynamics of tomato plants and reduce nematode infestation, we advise using B. megaterium capsules supplemented with humic acid.
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 6
Claim · model-written summary
Humic acid encapsulated B. megaterium significantly decreased tomato nematode parameters versus control.
- Taxon
- Tomato
Solanum lycopersicumt0 - Treatment
- humic acid-encapsulated B. megateriume0
- Interactor
- Meloidogyne javanicaMeloidogyne javanicat0pathogen
- Second interactor
- B. megaterium
Priestia megateriume0biocontrol_agent - Outcome
- nematode parameterse0
- Direction
- decreasee0
- Comparator
- control groupe0
- Setting
- greenhousee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In a greenhouse experiment, humic acid-encapsulated B. megaterium resulted in a significant decrease in nematode parameters compared to the control group”
t0“Tomato Growth and Suppresses the Root-Knot Nematode Meloidogyne javanica Under Greenhouse Conditions”
Claim · model-written summary
Ten capsules per plant decreased tomato nematode infestation relative to other inoculants.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- 10 capsules/plante0
- Interactor
- Meloidogyne javanicaMeloidogyne javanicat0pathogen
- Outcome
- nematode infestatione0
- Direction
- decreasede0
- Comparator
- other inoculantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When compared to other inoculants, the use of 10 capsules/plant decreased nematode infestation”
t0“Tomato Growth and Suppresses the Root-Knot Nematode Meloidogyne javanica Under Greenhouse Conditions”
Claim · model-written summary
Ten capsules per plant enhanced tomato growth parameters versus other inoculants.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- 10 capsules/plante0
- Interactor
- Bacillus megateriumPriestia megateriumt0biocontrol_agent
- Outcome
- plant growth parameterse0
- Direction
- enhancede0
- Comparator
- other inoculantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When compared to other inoculants, the use of 10 capsules/plant decreased nematode infestation and enhanced plant growth parameters, antioxidant enzymes, and photosynthetic pigments”
t0“Bacillus megaterium in Humic Acid-Supplied Alginate Beads Enhances Tomato Growth”
Claim · model-written summary
Ten capsules per plant enhanced tomato antioxidant enzymes and photosynthetic pigments.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- 10 capsules/plante0
- Interactor
- Bacillus megateriumPriestia megateriumt0biocontrol_agent
- Outcome
- antioxidant enzymes, and photosynthetic pigmentse0
- Direction
- enhancede0
- Comparator
- other inoculantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When compared to other inoculants, the use of 10 capsules/plant decreased nematode infestation and enhanced plant growth parameters, antioxidant enzymes, and photosynthetic pigments”
t0“Bacillus megaterium in Humic Acid-Supplied Alginate Beads Enhances Tomato Growth”
Claim · model-written summary
The treatments increased soil dehydrogenase activity, bacterial count, and acid and alkaline phosphatase at 30 and 60 days.
- Taxon
- TomatoSolanum lycopersicumt0
- Outcome
- dehydrogenase activity, total bacterial count, and acidic and alkaline phosphatase in soile0
- Direction
- increasede0
- Qualifier
- 30 and 60 days after transplantinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“These results are reflected in increased dehydrogenase activity, total bacterial count, and acidic and alkaline phosphatase in soil 30 and 60 days after transplanting”
t0“Tomato Growth and Suppresses the Root-Knot Nematode Meloidogyne javanica Under Greenhouse Conditions”
Claim · model-written summary
The authors advise humic acid supplemented B. megaterium capsules to improve tomato development and reduce nematode infestation.
- Taxon
- tomato plantsSolanum lycopersicume0
- Interactor
- B. megateriumPriestia megateriume0biocontrol_agent
- Outcome
- using B. megaterium capsules supplemented with humic acide0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Therefore, to increase the development dynamics of tomato plants and reduce nematode infestation, we advise using B. megaterium capsules supplemented with humic acid”
The same questions in other papers
Priestia megaterium · Meloidogyne javanica · Solanum lycopersicum (tomato)Results agree
1 paper in the same direction as this paper
- positive
other · Meloidogyne javanica · Solanum lycopersicum (tomato)Positive and negative results
5 papers in the same direction as this paper · 1 in the opposite direction
- negative
- positive
- 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.