Abstract
The impact of root leachates of Lantana camara L., a tropical weed, against Meloidogyne javanica, the root-knot nematode, was tested under laboratory and pot conditions. Concentrated and diluted root leachate caused substantial mortality of M. javanica juveniles. Significant suppression of the nematode was achieved when soil was treated with a full-strength concentration of the leachate. Whilst this high concentration retarded plant height and shoot fresh weight, more diluted concentrations actually enhanced plant growth. To establish whether this inhibition of plant growth from the leachate was the result of depleted nitrogen levels in the soil due to the leachate, soil treated with such leachates was given urea as an additional nitrogen source. Urea not only enhanced nematode suppression activity of the root leachates but also increased seedling emergence and growth of mungbean. Application of the L. camara root leachates in combination with Pseudomonas aeruginosa, a plant growth-promoting rhizobacterium, significantly reduced nematode population densities in roots and subsequent root-knot infection, and enhanced plant growth. While a high concentration of root leachate slightly reduced P. aeruginosa colonization in the rhizosphere and inner root tissues, the nematicidal efficacy of the bacterium was unaffected. The root leachate of L. camara was found to contain phenolic compounds, including p-hydroxybenzoic acid, vanillic acid, caffeic acid, ferulic acid and a quercetin glycoside, 7-glucoside. It also contained weak enzymic hydrogen cyanide.
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Claims 14
Claim · model-written summary
Concentrated and diluted Lantana camara root leachate increased mortality of Meloidogyne javanica juveniles.
- Taxon
- Lantana camara
_mit_Insekt.jpg?width=60)
Lantana camarat0 - Treatment
- Concentrated and diluted root leachatee1
- Interactor
- M. javanicaMeloidogyne javanicae1pathogen
- Outcome
- mortality of M. javanica juvenilese1
- Direction
- higherinferrede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_mit_Insekt.jpg?width=500)
Verbatim
t0“Nematicidal and allelopathic responses of Lantana camara root extract”
e1“Concentrated and diluted root leachate caused substantial mortality of M. javanica juveniles”
Claim · model-written summary
Full-strength root leachate applied to soil significantly suppressed the nematode.
- Taxon
- Lantana camaraLantana camarat0
- Treatment
- full-strength concentration of the leachatee2
- Outcome
- suppression of the nematodee2
- Direction
- decreaseinferrede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Nematicidal and allelopathic responses of Lantana camara root extract”
e2“Significant suppression of the nematode was achieved when soil was treated with a full-strength concentration of the leachate”
Claim · model-written summary
The high root leachate concentration reduced plant height and shoot fresh weight.
- Taxon
- Lantana camaraLantana camarat0
- Treatment
- high concentratione3
- Outcome
- plant height and shoot fresh weighte3
- Direction
- retardede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Nematicidal and allelopathic responses of Lantana camara root extract”
e3“Whilst this high concentration retarded plant height and shoot fresh weight”
Claim · model-written summary
More diluted root leachate concentrations enhanced plant growth.
- Taxon
- Lantana camaraLantana camarat0
- Treatment
- more diluted concentrationse4
- Outcome
- plant growthe4
- Direction
- enhancede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Nematicidal and allelopathic responses of Lantana camara root extract”
e4“more diluted concentrations actually enhanced plant growth”
Claim · model-written summary
Urea enhanced the nematode suppression activity of Lantana camara root leachates.
- Taxon
- Lantana camaraLantana camarat0
- Treatment
- Ureae5
- Outcome
- nematode suppression activity of the root leachatese5
- Direction
- enhancede5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Nematicidal and allelopathic responses of Lantana camara root extract”
e5“Urea not only enhanced nematode suppression activity of the root leachates but also increased seedling emergence and growth of mungbean”
Claim · model-written summary
Urea increased seedling emergence and growth of mungbean.
- Taxon
- mungbean
.jpg?width=60)
Vigna radiatae5 - Treatment
- Ureae5
- Outcome
- seedling emergence and growth of mungbeane5
- Direction
- increasede5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
t0“Nematicidal and allelopathic responses of Lantana camara root extract”
e5“Urea not only enhanced nematode suppression activity of the root leachates but also increased seedling emergence and growth of mungbean”
Claim · model-written summary
Combined root leachate and Pseudomonas aeruginosa significantly reduced nematode population densities in roots.
- Taxon
- Lantana camaraLantana camarat0
- Treatment
- root leachates in combination with Pseudomonas aeruginosae6
- Second interactor
- Pseudomonas aeruginosa
Pseudomonas aeruginosae6biocontrol_agent - Outcome
- nematode population densities in rootse6
- Direction
- reducede6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Nematicidal and allelopathic responses of Lantana camara root extract”
e6“Application of the L. camara root leachates in combination with Pseudomonas aeruginosa, a plant growth-promoting rhizobacterium, significantly reduced nematode population densities in roots and subsequent root-knot infection, and enhanced plant growth”
Claim · model-written summary
Combined root leachate and Pseudomonas aeruginosa significantly reduced root-knot infection.
- Taxon
- Lantana camaraLantana camarat0
- Treatment
- root leachates in combination with Pseudomonas aeruginosae6
- Second interactor
- Pseudomonas aeruginosaPseudomonas aeruginosae6biocontrol_agent
- Outcome
- root-knot infectione6
- Direction
- reducede6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Nematicidal and allelopathic responses of Lantana camara root extract”
e6“Application of the L. camara root leachates in combination with Pseudomonas aeruginosa, a plant growth-promoting rhizobacterium, significantly reduced nematode population densities in roots and subsequent root-knot infection, and enhanced plant growth”
Claim · model-written summary
Combined root leachate and Pseudomonas aeruginosa enhanced plant growth.
- Taxon
- Lantana camaraLantana camarat0
- Treatment
- root leachates in combination with Pseudomonas aeruginosae6
- Interactor
- Pseudomonas aeruginosaPseudomonas aeruginosae6symbiont
- Outcome
- plant growthe6
- Direction
- enhancede6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Nematicidal and allelopathic responses of Lantana camara root extract”
e6“Application of the L. camara root leachates in combination with Pseudomonas aeruginosa, a plant growth-promoting rhizobacterium, significantly reduced nematode population densities in roots and subsequent root-knot infection, and enhanced plant growth”
Claim · model-written summary
High root leachate concentration slightly reduced Pseudomonas aeruginosa colonization.
- Taxon
- Lantana camaraLantana camarat0
- Organ / stage
- rhizosphere and inner root tissuese7
- Treatment
- high concentration of root leachatee7
- Interactor
- P. aeruginosaPseudomonas aeruginosae7symbiont
- Outcome
- P. aeruginosa colonizatione7
- Direction
- reducede7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Nematicidal and allelopathic responses of Lantana camara root extract”
e7“While a high concentration of root leachate slightly reduced P. aeruginosa colonization in the rhizosphere and inner root tissues”
Claim · model-written summary
High root leachate concentration did not change the nematicidal efficacy of Pseudomonas aeruginosa.
- Taxon
- Lantana camaraLantana camarat0
- Treatment
- high concentration of root leachatee7
- Interactor
- P. aeruginosaPseudomonas aeruginosae7symbiont
- Outcome
- nematicidal efficacy of the bacteriume2
- Direction
- unaffectede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Nematicidal and allelopathic responses of Lantana camara root extract”
e7“While a high concentration of root leachate slightly reduced P. aeruginosa colonization in the rhizosphere and inner root tissues”
e2“the nematicidal efficacy of the bacterium was unaffected”
Claim · model-written summary
Lantana camara root leachate contained phenolic compounds, including p-hydroxybenzoic acid, vanillic acid and caffeic acid.
- Taxon
- Lantana camaraLantana camarat0
- Outcome
- phenolic compounds, including p-hydroxybenzoic acid, vanillic acid, caffeic acide1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Nematicidal and allelopathic responses of Lantana camara root extract”
e1“The root leachate of L. camara was found to contain phenolic compounds, including p-hydroxybenzoic acid, vanillic acid, caffeic acid, ferulic acid and a quercetin glycoside, 7-glucoside”
Claim · model-written summary
Lantana camara root leachate contained ferulic acid and a quercetin glycoside, 7-glucoside.
- Taxon
- Lantana camaraLantana camarat0
- Outcome
- ferulic acid and a quercetin glycoside, 7-glucosidee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Nematicidal and allelopathic responses of Lantana camara root extract”
e1“The root leachate of L. camara was found to contain phenolic compounds, including p-hydroxybenzoic acid, vanillic acid, caffeic acid, ferulic acid and a quercetin glycoside, 7-glucoside”
Claim · model-written summary
Lantana camara root leachate contained weak enzymic hydrogen cyanide.
- Taxon
- Lantana camaraLantana camarat0
- Outcome
- weak enzymic hydrogen cyanidee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Nematicidal and allelopathic responses of Lantana camara root extract”
e1“It also contained weak enzymic hydrogen cyanide”
The same questions in other papers
nitrogen · growth · Vigna radiata (mung bean)Positive and negative results
38 papers in the same direction as this paper · 1 in the opposite direction
- no effect
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