Abstract
This study evaluated the allelopathic effect of the Hesperozygis ringens essential oil using dicotyledonous and monocotyledonous seeds which are classified as weeds [Bidens pilosa and Lolium multiflorum], bioindicators [Lactuca sativa and Avena strigosa] and crops [Glycine max and Oryza sativa]. The essential oil from the leaves was extracted and analyzed by gas chromatography coupled to mass spectrometry and gas chromatography with flame ionization detector. The extractive was diluted in ethanol, Tween 20 and water, and then tested at concentrations of 0.25, 0.50, 1.00, 2.50, and 5.00% (v/v). Water and the highest concentration of the solvents were used as control groups. The analyzed variables were germination, emergence velocity index, roots and shoot lengths and total seedlings length. Pulegone was the major essential oil compound representing 82.02% of the composition. Considering dicot seeds, the highest concentration of the extractive completely inhibited the germination of Bidens pilosa without affecting the germination of Lactuca sativa and Glycine max. On monocots, the highest essential oil concentration affected the germination of Lolium multiflorum and Avena strigosa without affecting the Oryza sativa one. The results indicate that the extractive has the potential to control weeds because they were more affected than the crops.
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Claims 8
Claim · model-written summary
Pulegone accounted for 82.02% of the essential oil composition.
- Taxon
- Hesperozygis ringensHesperozygis ringenst0
- Outcome
- Pulegonee0
- Value
- 82.02%e0
Verbatim
e0“Pulegone was the major essential oil compound representing 82.02% of the composition”
t0“Hesperozygis ringens”
Claim · model-written summary
The highest essential oil concentration completely inhibited Bidens pilosa germination.
- Taxon
- Bidens pilosa
Bidens pilosae0 - Treatment
- highest concentration of the extractivee0
- Outcome
- germination of Bidens pilosae0
- Direction
- completely inhibitede0
- Qualifier
- 5.00% (v/v)e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the highest concentration of the extractive completely inhibited the germination of Bidens pilosa”
e1“5.00% (v/v)”
t0“Hesperozygis ringens”
Claim · model-written summary
The highest oil concentration did not affect Lactuca sativa germination.
- Taxon
- Lactuca sativa
Lactuca sativae0 - Outcome
- germination of Lactuca sativae0
- Direction
- without affectinge0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“without affecting the germination of Lactuca sativa and Glycine max”
Claim · model-written summary
The highest oil concentration did not affect Glycine max germination.
- Taxon
- Glycine max
Glycine maxe0 - Outcome
- germination of Lactuca sativa and Glycine maxe0
- Direction
- without affectinge0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“without affecting the germination of Lactuca sativa and Glycine max”
Claim · model-written summary
The highest oil concentration affected Lolium multiflorum germination.
- Taxon
- Lolium multiflorum
Lolium multiflorume0 - Treatment
- highest essential oil concentratione0
- Outcome
- germination of Lolium multiflorume0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the highest essential oil concentration affected the germination of Lolium multiflorum and Avena strigosa”
Claim · model-written summary
The highest oil concentration affected Avena strigosa germination.
- Taxon
- Avena strigosa
Avena strigosae0 - Treatment
- highest essential oil concentratione0
- Outcome
- germination of Lolium multiflorum and Avena strigosae0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the highest essential oil concentration affected the germination of Lolium multiflorum and Avena strigosa”
Claim · model-written summary
The highest oil concentration did not affect Oryza sativa germination.
- Taxon
- Oryza sativa
Oryza sativae0 - Treatment
- highest essential oil concentratione1
- Outcome
- Oryza sativa onee0
- Direction
- without affectinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“without affecting the Oryza sativa one”
e1“the highest essential oil concentration affected the germination”
Claim · model-written summary
The authors consider the oil a potential weed control agent because weeds were more affected than crops.
- Taxon
- Hesperozygis ringensHesperozygis ringenst0
- Outcome
- potential to control weedse0
Verbatim
e0“the extractive has the potential to control weeds because they were more affected than the crops”
t0“Hesperozygis ringens”
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See all 37 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.