Abstract
Allelopathic activity of dominant upland weed species was determined using aqueous and methanol extracts and dried residues of the weeds. Germination and seedling growth of radish (Raphanus sativus L.) and sesame (Sesamum indicum L.) were greatly inhibited by 2% (w/v) aqueous extracts of Artemisia asiatica Nakai and Portulaca oleracea L., respectively. Great phytotoxicity on both indicator plants occurred by 2% (w/v) aqueous extracts of Capsel/a bursa-pastoris (L.) Medik. A complete inhibition in germination and seedling growth of radish was caused by 2% (w/v) methanol extract of A. asiatica. There was about 90% inhibition in germination and seedling growth of sesame due to 2% (w/v) methanol extracts of A. asiatica, P. oleracea and Trifolium repens L. Phytotoxic effects varied with extract solution, weed species and indicator plants employed, indicating that the weed species contained different contents and kinds of allelopathic chemicals. Water potential and pH adjusted to those of the extracts did not affect germination and seedling growth of the indicator plants. Phytotoxicity increased with increasing concentration of the extracts obtained from four suspected alleopathic weeds. Soil-incorporated plant residues of A. asiatica and P. oleracea caused greater phytotoxicity on radish than those of C. bursa-pastoris and T. repens.
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Claims 9
Claim · model-written summary
Artemisia asiatica aqueous extract greatly inhibited radish germination and seedling growth.
- Taxon
- radish (Raphanus sativus L.)
Raphanus sativuse0 - Treatment
- 2% (w/v) aqueous extracts of Artemisia asiatica Nakaie0
- Interactor
- Artemisia asiatica Nakai
Artemisia dubia var. asiaticae0weed - Outcome
- Germination and seedling growth of radishe0
- Direction
- greatly inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Germination and seedling growth of radish (Raphanus sativus L.) and sesame (Sesamum indicum L.) were greatly inhibited by 2% (w/v) aqueous extracts of Artemisia asiatica Nakai and Portulaca oleracea L., respectively.”
Claim · model-written summary
Portulaca oleracea aqueous extract greatly inhibited sesame germination and seedling growth.
- Taxon
- sesame (Sesamum indicum L.)
Sesamum indicume0 - Treatment
- 2% (w/v) aqueous extracts of Artemisia asiatica Nakai and Portulaca oleracea L.e0
- Interactor
- Portulaca oleracea L.
Portulaca oleraceae0weed - Outcome
- Germination and seedling growth of radish (Raphanus sativus L.) and sesame (Sesamum indicum L.)e0
- Direction
- greatly inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Germination and seedling growth of radish (Raphanus sativus L.) and sesame (Sesamum indicum L.) were greatly inhibited by 2% (w/v) aqueous extracts of Artemisia asiatica Nakai and Portulaca oleracea L., respectively.”
Claim · model-written summary
Capsel/a bursa-pastoris aqueous extract was strongly phytotoxic to both indicator plants.
- Taxon
- radish (Raphanus sativus L.) and sesame (Sesamum indicum L.)Raphanus sativusSesamum indicumt0
- Treatment
- 2% (w/v) aqueous extracts of Capsel/a bursa-pastoris (L.) Medik.e0
- Interactor
- Capsel/a bursa-pastoris (L.) Medik.e0weed
- Outcome
- Great phytotoxicity on both indicator plantse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Great phytotoxicity on both indicator plants occurred by 2% (w/v) aqueous extracts of Capsel/a bursa-pastoris (L.) Medik.”
t0“radish (Raphanus sativus L.) and sesame (Sesamum indicum L.) were”
Claim · model-written summary
Artemisia asiatica methanol extract completely inhibited radish germination and seedling growth.
- Taxon
- radishRaphanus sativuse0
- Treatment
- 2% (w/v) methanol extract of A. asiaticae0
- Interactor
- A. asiaticaArtemisia dubia var. asiaticae0weed
- Outcome
- germination and seedling growth of radishe0
- Direction
- complete inhibitione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A complete inhibition in germination and seedling growth of radish was caused by 2% (w/v) methanol extract of A. asiatica.”
Claim · model-written summary
Methanol extracts of A. asiatica, P. oleracea and Trifolium repens inhibited sesame germination and growth by about 90%.
- Taxon
- sesameSesamum indicume0
- Treatment
- 2% (w/v) methanol extracts of A. asiatica, P. oleracea and Trifolium repens L.e0
- Interactor
- A. asiaticaArtemisia dubia var. asiaticae0weed
- Second interactor
- P. oleraceaPortulaca oleraceae0weed
- Outcome
- germination and seedling growth of sesamee0
- Direction
- inhibitione0
- Value
- about 90%e0
- Qualifier
- Trifolium repens L.e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was about 90% inhibition in germination and seedling growth of sesame due to 2% (w/v) methanol extracts of A. asiatica, P. oleracea and Trifolium repens L.”
Claim · model-written summary
Phytotoxic effects varied with extract solution, weed species and indicator plant.
- Taxon
- radish (Raphanus sativus L.) and sesame (Sesamum indicum L.)Raphanus sativusSesamum indicumt0
- Outcome
- Phytotoxic effectse0
- Qualifier
- extract solution, weed species and indicator plants employede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Phytotoxic effects varied with extract solution, weed species and indicator plants employed”
t0“radish (Raphanus sativus L.) and sesame (Sesamum indicum L.) were”
Claim · model-written summary
Adjusted water potential and pH did not affect indicator plant germination or seedling growth.
- Taxon
- radish (Raphanus sativus L.) and sesame (Sesamum indicum L.)Raphanus sativusSesamum indicumt0
- Treatment
- Water potential and pH adjusted to those of the extractse0
- Outcome
- germination and seedling growth of the indicator plantse0
- Direction
- did not affecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Water potential and pH adjusted to those of the extracts did not affect germination and seedling growth of the indicator plants.”
t0“radish (Raphanus sativus L.) and sesame (Sesamum indicum L.) were”
Claim · model-written summary
Phytotoxicity increased as extract concentration increased.
- Taxon
- radish (Raphanus sativus L.) and sesame (Sesamum indicum L.)Raphanus sativusSesamum indicumt0
- Treatment
- increasing concentration of the extractse0
- Outcome
- Phytotoxicitye0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Phytotoxicity increased with increasing concentration of the extracts obtained from four suspected alleopathic weeds.”
t0“radish (Raphanus sativus L.) and sesame (Sesamum indicum L.) were”
Claim · model-written summary
Soil incorporated residues of A. asiatica and P. oleracea were more phytotoxic to radish than residues of the other two weeds.
- Taxon
- radishRaphanus sativuse0
- Treatment
- Soil-incorporated plant residues of A. asiatica and P. oleraceae0
- Interactor
- A. asiaticaArtemisia dubia var. asiaticae0weed
- Second interactor
- P. oleraceaPortulaca oleraceae0weed
- Outcome
- phytotoxicity on radishe0
- Direction
- greatere0
- Comparator
- those of C. bursa-pastoris and T. repense0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soil-incorporated plant residues of A. asiatica and P. oleracea caused greater phytotoxicity on radish than those of C. bursa-pastoris and T. repens.”
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See all 6 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.