Abstract
Aqueous extracts of quackgrass [ Agropyron repens (L.) Beauv. # AGRRE] shoots and rhizomes inhibited seed germination and root growth of alfalfa ( Medicago sativa L. ‘Vernal’), soybean ( Glycine max (L.) Merr. ‘Corsoy 79’], navybean ( Phaseolus vulgaris L. ‘Seafarer’), and curly cress ( Lepidium sativum L.) at concentrations of less than 2.5 mg dried extract/ml. Extracts of quackgrass shoots were generally more inhibitory than extracts of rhizomes. Root and shoot dry weights of snapbeans ( Phaseolus vulgaris L. ‘Bush Blue Lake’) grown under sterile conditions were reduced by aqueous extracts of shoots. Root systems were stunted and necrotic and lacked root hairs. The growth of Rhizobium species was not influenced by the presence of 40 or 80 mg/ml concentrations of extracts of shoots or rhizomes. Quackgrass may inhibit indirectly the legume- Rhizobium symbiosis by inhibiting root hair formation rather than directly inhibiting Rhizobium growth. The presence of soil microorganisms was not necessary for the development of quackgrass toxicity in soil or agar. Soil microorganisms reduced toxicity of quackgrass residues in soil.
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Claims 11
Claim · model-written summary
Quackgrass extracts inhibited germination and root growth of alfalfa.
- Taxon
- alfalfa
Medicago sativae0 - Material
- Vernale0
- Treatment
- Aqueous extracts of quackgrasse0
- Interactor
- quackgrasse0weed
- Outcome
- seed germination and root growthe0
- Direction
- inhibitede0
- Qualifier
- less than 2.5 mg dried extract/mle0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Aqueous extracts of quackgrass [ Agropyron repens (L.) Beauv. # AGRRE] shoots and rhizomes inhibited seed germination and root growth of alfalfa ( Medicago sativa L. ‘Vernal’), soybean ( Glycine max (L.) Merr. ‘Corsoy 79’], navybean ( Phaseolus vulgaris L. ‘Seafarer’), and curly cress ( Lepidium sativum L.) at concentrations of less than 2.5 mg dried extract/ml”
Claim · model-written summary
Quackgrass extracts inhibited germination and root growth of soybean.
- Taxon
- soybean
Glycine maxe0 - Material
- Corsoy 79e0
- Treatment
- Aqueous extracts of quackgrasse0
- Interactor
- quackgrasse0weed
- Outcome
- seed germination and root growthe0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Aqueous extracts of quackgrass [ Agropyron repens (L.) Beauv. # AGRRE] shoots and rhizomes inhibited seed germination and root growth of alfalfa ( Medicago sativa L. ‘Vernal’), soybean ( Glycine max (L.) Merr. ‘Corsoy 79’], navybean ( Phaseolus vulgaris L. ‘Seafarer’), and curly cress ( Lepidium sativum L.) at concentrations of less than 2.5 mg dried extract/ml”
Claim · model-written summary
Quackgrass extracts inhibited germination and root growth of navybean.
- Taxon
- navybeane0
- Material
- Seafarere0
- Treatment
- Aqueous extracts of quackgrasse0
- Interactor
- quackgrasse0weed
- Outcome
- seed germination and root growthe0
- Direction
- inhibitede0
Not reportedComparator
Verbatim
e0“Aqueous extracts of quackgrass [ Agropyron repens (L.) Beauv. # AGRRE] shoots and rhizomes inhibited seed germination and root growth of alfalfa ( Medicago sativa L. ‘Vernal’), soybean ( Glycine max (L.) Merr. ‘Corsoy 79’], navybean ( Phaseolus vulgaris L. ‘Seafarer’), and curly cress ( Lepidium sativum L.) at concentrations of less than 2.5 mg dried extract/ml”
Claim · model-written summary
Quackgrass extracts inhibited germination and root growth of curly cress.
- Taxon
- curly cresse0
- Treatment
- Aqueous extracts of quackgrasse0
- Interactor
- quackgrasse0weed
- Outcome
- seed germination and root growthe0
- Direction
- inhibitede0
Not reportedComparator
Verbatim
e0“Aqueous extracts of quackgrass [ Agropyron repens (L.) Beauv. # AGRRE] shoots and rhizomes inhibited seed germination and root growth of alfalfa ( Medicago sativa L. ‘Vernal’), soybean ( Glycine max (L.) Merr. ‘Corsoy 79’], navybean ( Phaseolus vulgaris L. ‘Seafarer’), and curly cress ( Lepidium sativum L.) at concentrations of less than 2.5 mg dried extract/ml”
Claim · model-written summary
Shoot extracts were generally more inhibitory than rhizome extracts.
Verbatim
t0“Legume Seedling Growth”
e0“Extracts of quackgrass shoots were generally more inhibitory than extracts of rhizomes”
Claim · model-written summary
Shoot extracts reduced snapbean root and shoot dry weights.
- Taxon
- snapbeanse0
- Material
- Bush Blue Lakee0
- Treatment
- aqueous extracts of shootse0
- Outcome
- Root and shoot dry weightse0
- Direction
- reducede0
- Setting
- sterile conditionse0
Not reportedComparator
Verbatim
e0“Root and shoot dry weights of snapbeans ( Phaseolus vulgaris L. ‘Bush Blue Lake’) grown under sterile conditions were reduced by aqueous extracts of shoots”
Claim · model-written summary
Treated snapbean root systems were stunted, necrotic and lacked root hairs.
Verbatim
t0“Legume Seedling Growth”
e0“Root systems were stunted and necrotic and lacked root hairs”
Claim · model-written summary
Extracts at 40 or 80 mg/ml did not influence Rhizobium growth.
- Treatment
- extracts of shoots or rhizomese0
- Outcome
- growth of Rhizobium speciese0
- Direction
- not influencede0
RhizobiumNot reportedTaxonComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The growth of Rhizobium species was not influenced by the presence of 40 or 80 mg/ml concentrations of extracts of shoots or rhizomes”
Claim · model-written summary
Quackgrass may inhibit legume–Rhizobium symbiosis indirectly through loss of root hairs.
- Taxon
- legumee0
- Second interactor
- Quackgrasse0weed
- Outcome
- legume- Rhizobium symbiosise0
- Qualifier
- inhibiting root hair formatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Quackgrass may inhibit indirectly the legume- Rhizobium symbiosis by inhibiting root hair formation rather than directly inhibiting Rhizobium growth”
Claim · model-written summary
Soil microorganisms were unnecessary for quackgrass toxicity to develop.
Verbatim
e0“The presence of soil microorganisms was not necessary for the development of quackgrass toxicity in soil or agar”
Claim · model-written summary
Soil microorganisms reduced toxicity of quackgrass residues.
- Taxon
- quackgrasse0
- Treatment
- Soil microorganismse0
- Outcome
- toxicity of quackgrass residuese0
- Direction
- reducede0
Not reportedComparator
Verbatim
e0“Soil microorganisms reduced toxicity of quackgrass residues in soil”
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See all 115 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.