Abstract
Greenhouse and laboratory studies were conducted to determine the allelopathic potential of two sweet potato [ Ipomoea batatas L. (Lam.)] cultivars, ‘Regal’ and ‘SC 1149-19’. Yellow nutsedge ( Cyperus esculentus L. # CYPES) and alfalfa ( Medicago sativa L.) plants grown in soil from sweet potato field plots accumulated less dry matter than plants grown in soil from adjacent weedy plots. Growth of yellow nutsedge and alfalfa plants was also reduced when grown in a potting medium containing decomposing sweet potato plants in comparison to plants grown in potting medium alone. When the sweet potato potting medium mixture was incubated at 25 C and tested weekly using an alfalfa growth bioassay, inhibition was high initially but decreased over time and was not observed after a 12-week incubation. Aqueous methanol (50%)-soluble extracts of sweet potato periderm were inhibitory to yellow nutsedge root growth in vermiculite and alfalfa seed germination on filter paper. Regal extracts were inhibitory to yellow nutsedge root growth at a concentration of 2.5 mg periderm extracted/ml, but SC 1149-19 extract was inhibitory only at a concentration eight times higher. Similar differences between cultivars were observed with the alfalfa germination bioassay. Preliminary separation of the Regal periderm extract by paper chromatography indicated the presence of phenolic compounds with a wide range of polarities. Several of these UV-visible compounds were inhibitory to alfalfa germination.
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Claims 12
Claim · model-written summary
Yellow nutsedge accumulated less dry matter in soil from sweet potato field plots than in soil from adjacent weedy plots.
- Taxon
- sweet potato
_Flower.jpg?width=60)
Ipomoea batatase1 - Treatment
- soil from sweet potato field plotse1
- Interactor
- Yellow nutsedgee1weed
- Outcome
- dry mattere1
- Direction
- lesse1
- Comparator
- soil from adjacent weedy plotse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Flower.jpg?width=500)
Verbatim
e1“Yellow nutsedge ( Cyperus esculentus L. # CYPES) and alfalfa ( Medicago sativa L.) plants grown in soil from sweet potato field plots accumulated less dry matter than plants grown in soil from adjacent weedy plots”
Claim · model-written summary
Alfalfa accumulated less dry matter in soil from sweet potato field plots than in soil from adjacent weedy plots.
- Taxon
- alfalfa
Medicago sativae1 - Treatment
- soil from sweet potato field plotse1
- Outcome
- dry mattere1
- Direction
- lesse1
- Comparator
- soil from adjacent weedy plotse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Yellow nutsedge ( Cyperus esculentus L. # CYPES) and alfalfa ( Medicago sativa L.) plants grown in soil from sweet potato field plots accumulated less dry matter than plants grown in soil from adjacent weedy plots”
Claim · model-written summary
Yellow nutsedge growth was reduced in a potting medium containing decomposing sweet potato plants compared with potting medium alone.
- Taxon
- sweet potatoIpomoea batatase1
- Treatment
- potting medium containing decomposing sweet potato plantse1
- Interactor
- yellow nutsedgee1weed
- Outcome
- Growthe1
- Direction
- reducede1
- Comparator
- potting medium alonee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Growth of yellow nutsedge and alfalfa plants was also reduced when grown in a potting medium containing decomposing sweet potato plants in comparison to plants grown in potting medium alone”
Claim · model-written summary
Alfalfa growth was reduced in a potting medium containing decomposing sweet potato plants compared with potting medium alone.
- Taxon
- alfalfaMedicago sativae1
- Treatment
- potting medium containing decomposing sweet potato plantse1
- Outcome
- Growthe1
- Direction
- reducede1
- Comparator
- potting medium alonee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Growth of yellow nutsedge and alfalfa plants was also reduced when grown in a potting medium containing decomposing sweet potato plants in comparison to plants grown in potting medium alone”
Claim · model-written summary
Inhibition of alfalfa growth in the sweet potato potting medium mixture was high initially, decreased over time and was not observed after a 12-week incubation.
- Taxon
- alfalfaMedicago sativae1
- Treatment
- sweet potato potting medium mixturee1
- Outcome
- inhibitione1
- Direction
- decreased over timee1
- Qualifier
- was not observed after a 12-week incubatione1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“When the sweet potato potting medium mixture was incubated at 25 C and tested weekly using an alfalfa growth bioassay, inhibition was high initially but decreased over time and was not observed after a 12-week incubation”
Claim · model-written summary
Aqueous methanol-soluble extracts of sweet potato periderm were inhibitory to yellow nutsedge root growth in vermiculite.
- Taxon
- sweet potatoIpomoea batatase1
- Treatment
- Aqueous methanol (50%)-soluble extractse1
- Interactor
- yellow nutsedgee1weed
- Outcome
- root growthe1
- Direction
- inhibitorye1
- Setting
- vermiculitee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Aqueous methanol (50%)-soluble extracts of sweet potato periderm were inhibitory to yellow nutsedge root growth in vermiculite and alfalfa seed germination on filter paper”
Claim · model-written summary
Aqueous methanol-soluble extracts of sweet potato periderm were inhibitory to alfalfa seed germination on filter paper.
- Taxon
- alfalfaMedicago sativae1
- Treatment
- Aqueous methanol (50%)-soluble extractse1
- Outcome
- seed germinatione1
- Direction
- inhibitorye1
- Setting
- filter papere1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Aqueous methanol (50%)-soluble extracts of sweet potato periderm were inhibitory to yellow nutsedge root growth in vermiculite and alfalfa seed germination on filter paper”
Claim · model-written summary
Regal periderm extract at 2.5 mg periderm extracted/ml was inhibitory to yellow nutsedge root growth.
- Taxon
- sweet potatoIpomoea batatase1
- Material
- Regale2
- Treatment
- Regal extractse2
- Interactor
- yellow nutsedgee2weed
- Outcome
- root growthe2
- Direction
- inhibitorye2
- Value
- 2.5 mg periderm extracted/mle2
- Comparator
- SC 1149-19 extracte2
- Setting
- Greenhousee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Greenhouse and laboratory studies were conducted to determine the allelopathic potential of two sweet potato [ Ipomoea batatas L. (Lam.)] cultivars”
e2“Regal extracts were inhibitory to yellow nutsedge root growth at a concentration of 2.5 mg periderm extracted/ml, but SC 1149-19 extract was inhibitory only at a concentration eight times higher”
Claim · model-written summary
SC 1149-19 periderm extract was inhibitory to yellow nutsedge root growth only at a concentration eight times higher than Regal.
- Taxon
- sweet potatoIpomoea batatase1
- Material
- SC 1149-19e2
- Treatment
- SC 1149-19 extracte2
- Interactor
- yellow nutsedgee2weed
- Outcome
- root growthe2
- Direction
- inhibitorye2
- Value
- eight times highere2
- Qualifier
- only at a concentratione2
- Comparator
- Regal extractse2
- Setting
- Greenhousee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Greenhouse and laboratory studies were conducted to determine the allelopathic potential of two sweet potato [ Ipomoea batatas L. (Lam.)] cultivars”
e2“Regal extracts were inhibitory to yellow nutsedge root growth at a concentration of 2.5 mg periderm extracted/ml, but SC 1149-19 extract was inhibitory only at a concentration eight times higher”
Claim · model-written summary
Similar differences between sweet potato cultivars were observed in the alfalfa germination bioassay.
- Taxon
- sweet potatoIpomoea batatase1
- Material
- cultivarse7
- Outcome
- alfalfa germination bioassaye7
- Qualifier
- Similar differences between cultivarse7
- Setting
- Greenhousee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Greenhouse and laboratory studies were conducted to determine the allelopathic potential of two sweet potato [ Ipomoea batatas L. (Lam.)] cultivars”
e7“Similar differences between cultivars were observed with the alfalfa germination bioassay”
Claim · model-written summary
Regal periderm extract indicated the presence of phenolic compounds with a wide range of polarities.
- Taxon
- sweet potatoIpomoea batatase1
- Material
- Regale2
- Organ / stage
- periderme2
- Outcome
- presence of phenolic compoundse2
- Qualifier
- with a wide range of polaritiese2
- Setting
- Greenhousee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Greenhouse and laboratory studies were conducted to determine the allelopathic potential of two sweet potato [ Ipomoea batatas L. (Lam.)] cultivars”
e2“Preliminary separation of the Regal periderm extract by paper chromatography indicated the presence of phenolic compounds with a wide range of polarities”
Claim · model-written summary
Several UV-visible compounds of the sweet potato periderm extract were inhibitory to alfalfa germination.
- Taxon
- sweet potatoIpomoea batatase1
- Treatment
- UV-visible compoundse2
- Outcome
- alfalfa germinatione2
- Direction
- inhibitorye2
- Setting
- Greenhousee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Greenhouse and laboratory studies were conducted to determine the allelopathic potential of two sweet potato [ Ipomoea batatas L. (Lam.)] cultivars”
e2“Several of these UV-visible compounds were inhibitory to alfalfa germination”
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See all 32 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.