Abstract
BackgroundThe common bean plants "Phaseolus vulgaris L." is frequently attacked by the two spotted spider mite (TSSM) Tetranychus urticae, causing a substantial decrease in bean plant growth and yield as well as leaflet structure. Therefore, for commercial bean cultivation in the field controlling TSSM infection is necessary. ResultsFoliar application of salicylic acid (SA) or methyl jasmonate (MeJA) on common bean plants before or after two spotted spider mite infestation proved to be effective in reducing infestations. In most concentrations these elicitors significantly improved common bean plant growth i.e. had a positive effect on plant height, number of branches, shoot dry weight and leaf area per plant and bean yield. SA at 100 mg/l had the strongest positive effect. Moreover, application of elicitors significantly altered leaflet anatomical characters i.e. increased thickness of leaflet blade, thickness of palisade and spongy parenchyma as well as thickness of midrib region of the leaflet and changed the dimension of vascular bundles. Alternatively, TSSM infestation had the opposite effect on these leaflet anatomical characters.ConclusionWe conclude that SA or MeJA could be used for controlling TSSM infestation, to improve plant growth and to improve bean yield in the field.
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Claims 8
Claim · model-written summary
Salicylic acid reduced spider mite infestation on common bean.
- Taxon
- common bean
Phaseolus vulgarise0 - Treatment
- salicylic acid (SA)e0
- Interactor
- Tetranychus urticae
.jpg?width=60)
Tetranychus urticaee1pest - Outcome
- spider mite infestatione0
- Direction
- reducinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Foliar application of salicylic acid (SA) or methyl jasmonate (MeJA) on common bean plants before or after two spotted spider mite infestation proved to be effective in reducing infestations”
e1“Tetranychus urticae”
Claim · model-written summary
Methyl jasmonate reduced spider mite infestation on common bean.
- Taxon
- common beanPhaseolus vulgarise0
- Treatment
- methyl jasmonate (MeJA)e0
- Interactor
- Tetranychus urticaeTetranychus urticaee1pest
- Outcome
- spider mite infestatione0
- Direction
- reducinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Foliar application of salicylic acid (SA) or methyl jasmonate (MeJA) on common bean plants before or after two spotted spider mite infestation proved to be effective in reducing infestations”
e1“Tetranychus urticae”
Claim · model-written summary
Defense elicitors significantly improved bean height, branch number and shoot dry weight.
- Taxon
- common beanPhaseolus vulgarise0
- Treatment
- elicitorse0
- Outcome
- plant height, number of branches, shoot dry weighte0
- Direction
- improvede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“elicitors significantly improved common bean plant growth i.e. had a positive effect on plant height, number of branches, shoot dry weight and leaf area per plant and bean yield”
Claim · model-written summary
Defense elicitors significantly improved bean leaf area and yield.
- Taxon
- common beanPhaseolus vulgarise0
- Treatment
- elicitorse0
- Outcome
- leaf area per plant and bean yielde0
- Direction
- improvede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“elicitors significantly improved common bean plant growth i.e. had a positive effect on plant height, number of branches, shoot dry weight and leaf area per plant and bean yield”
Claim · model-written summary
Salicylic acid at 100 mg/l had the strongest positive effect.
- Taxon
- common beanPhaseolus vulgarise1
- Treatment
- SA at 100 mg/le0
- Outcome
- strongest positive effecte0
- Direction
- strongest positive effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“SA at 100 mg/l had the strongest positive effect”
e1“on common bean plants before or after”
Claim · model-written summary
Elicitors increased leaflet blade, palisade parenchyma and spongy parenchyma thickness.
- Taxon
- common beanPhaseolus vulgarise1
- Treatment
- elicitorse0
- Outcome
- thickness of leaflet blade, thickness of palisade and spongy parenchymae0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“application of elicitors significantly altered leaflet anatomical characters i.e. increased thickness of leaflet blade, thickness of palisade and spongy parenchyma”
e1“on common bean plants before or after”
Claim · model-written summary
Spider mite infestation had effects opposite to elicitors on leaflet anatomical characters.
- Taxon
- common beanPhaseolus vulgarise1
- Treatment
- TSSM infestatione0
- Interactor
- Tetranychus urticaeTetranychus urticaee2pest
- Outcome
- leaflet anatomical characterse0
- Direction
- opposite effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“TSSM infestation had the opposite effect on these leaflet anatomical characters”
e1“on common bean plants before or after”
e2“Tetranychus urticae”
Claim · model-written summary
The authors recommend salicylic acid or methyl jasmonate for controlling mites and improving bean growth and yield in the field.
- Taxon
- common beanPhaseolus vulgarise1
- Outcome
- controlling TSSM infestation, to improve plant growth and to improve bean yield in the fielde0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“SA or MeJA could be used for controlling TSSM infestation, to improve plant growth and to improve bean yield in the field”
e1“on common bean plants before or after”
The same questions in other papers
resistance inducer · yield · Phaseolus vulgaris (common bean)Positive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- no effect
- positive
infection · Tetranychus urticae · Phaseolus vulgaris (common bean)Positive and negative results
2 in the opposite direction
- positive
- positive
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.