Abstract
The present study was conducted to analyze allelochemicals by HPLC method in Barnyardgrass root exudates. The pure seeds of barnyardgrass were collected and grown in hydroponics system to study their root exudates effects on germination and seedling growth parameters of four rice cultivars (Neda, Nemat, Dullar and IR60). Experiment was evaluated in a factorial arrangement with two factors in a completely randomized design with four replications. Barnyardgrass root exudates obtained from hydroponics was qualified and quantified with HPLC method. Among of detected phenolic acids, the highest content was related to p-hydroxybenzoic acid (4.3 mg/l) and the lowest amount was belong to cinnamic acid (0.91 mg/l). Root exudates had the highest inhibitory activity on root length of Dullar cultivar (by 45.85% inhibition) and the lowest amount was belong to IR60 cultivar (by 31.13% inhibition). the highest inhibition of protein content (by 16.61%) was related to 100% concentration of root exudates on Dullar cltivar and the lowest inhibitions (by 9.63, 9.74 and 9.81%, respectively) were belong to Nemat, IR60 and Neda cultivars in 50% concentration of root exudates. Furthermore root exudates of Dashtisard had a least inhibitory effect on all studied traits. It seems that, if a blend of compounds is responsible for the observed growth inhibition of rice, phenolic acids such as p-hydroxybenzoicacid could play the key roles, because of this compound detected in higher range than the other allelocemicals.
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Claims 10
Claim · model-written summary
p-hydroxybenzoic acid was the most abundant detected phenolic acid in barnyardgrass exudates at 4.3 mg/l.
- Taxon
- Barnyardgrass
Echinochloa crus-gallit0 - Organ / stage
- root exudatest1
- Outcome
- highest content was related to p-hydroxybenzoic acide0
- Direction
- higheste0
- Value
- 4.3 mg/le0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Among of detected phenolic acids, the highest content was related to p-hydroxybenzoic acid (4.3 mg/l)”
t0“Barnyardgrass”
t1“root exudates of Barnyardgrass”
Claim · model-written summary
Cinnamic acid had the lowest detected content in barnyardgrass exudates at 0.91 mg/l.
- Taxon
- BarnyardgrassEchinochloa crus-gallit0
- Organ / stage
- root exudatest0
- Outcome
- lowest amount was belong to cinnamic acide0
- Direction
- loweste0
- Value
- 0.91 mg/le0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the lowest amount was belong to cinnamic acid (0.91 mg/l)”
t0“root exudates of Barnyardgrass”
Claim · model-written summary
Barnyardgrass exudates inhibited Dullar rice root length by 45.85%, the highest cultivar inhibition.
- Taxon
- rice
Oryza sativat1 - Material
- Dullare0
- Treatment
- Root exudatese0
- Interactor
- BarnyardgrassEchinochloa crus-gallit0weed
- Outcome
- root lengthe0
- Direction
- inhibitorye0
- Value
- 45.85%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Root exudates had the highest inhibitory activity on root length of Dullar cultivar (by 45.85% inhibition)”
t0“Barnyardgrass”
t1“rice”
Claim · model-written summary
Barnyardgrass exudates inhibited IR60 rice root length by 31.13%, the lowest cultivar inhibition.
- Taxon
- riceOryza sativat1
- Material
- IR60e0
- Treatment
- root exudatest0
- Interactor
- BarnyardgrassEchinochloa crus-gallit0weed
- Outcome
- root lengthe1
- Direction
- loweste0
- Value
- 31.13%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the lowest amount was belong to IR60 cultivar (by 31.13% inhibition)”
e1“Root exudates had the highest inhibitory activity on root length of Dullar cultivar (by 45.85% inhibition)”
t0“root exudates of Barnyardgrass”
t1“rice”
Claim · model-written summary
Full-strength exudates inhibited Dullar protein content by 16.61%.
- Taxon
- riceOryza sativat0
- Material
- Dullare0
- Treatment
- 100% concentration of root exudatese0
- Interactor
- BarnyardgrassEchinochloa crus-gallit1weed
- Outcome
- protein contente0
- Direction
- inhibitione0
- Value
- 16.61%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the highest inhibition of protein content (by 16.61%) was related to 100% concentration of root exudates on Dullar cltivar”
t0“rice”
t1“Barnyardgrass”
Claim · model-written summary
Half-strength exudates inhibited Nemat protein content by 9.63%.
- Taxon
- riceOryza sativat0
- Material
- Nemate0
- Treatment
- 50% concentration of root exudatese0
- Interactor
- BarnyardgrassEchinochloa crus-gallit1weed
- Outcome
- inhibitionse0
- Direction
- inhibitionse0
- Value
- 9.63e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the lowest inhibitions (by 9.63, 9.74 and 9.81%, respectively) were belong to Nemat, IR60 and Neda cultivars in 50% concentration of root exudates”
t0“rice”
t1“Barnyardgrass”
Claim · model-written summary
Half-strength exudates inhibited IR60 protein content by 9.74%.
- Taxon
- riceOryza sativat0
- Material
- IR60e0
- Treatment
- 50% concentration of root exudatese0
- Interactor
- BarnyardgrassEchinochloa crus-gallit1weed
- Outcome
- protein contente1
- Direction
- inhibitionse0
- Value
- 9.74e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the lowest inhibitions (by 9.63, 9.74 and 9.81%, respectively) were belong to Nemat, IR60 and Neda cultivars in 50% concentration of root exudates”
e1“protein content”
t0“rice”
t1“Barnyardgrass”
Claim · model-written summary
Half-strength exudates inhibited Neda protein content by 9.81%.
- Taxon
- riceOryza sativat0
- Material
- Nedae0
- Treatment
- 50% concentration of root exudatese0
- Interactor
- BarnyardgrassEchinochloa crus-gallit1weed
- Outcome
- protein contente1
- Direction
- inhibitionse0
- Value
- 9.81%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the lowest inhibitions (by 9.63, 9.74 and 9.81%, respectively) were belong to Nemat, IR60 and Neda cultivars in 50% concentration of root exudates”
e1“protein content”
t0“rice”
t1“Barnyardgrass”
Claim · model-written summary
Dashtisard exudates had the least inhibitory effect across studied rice traits.
- Taxon
- riceOryza sativat0
- Material
- Dashtisarde0
- Treatment
- root exudates of Dashtisarde0
- Outcome
- all studied traitse0
- Direction
- least inhibitorye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“root exudates of Dashtisard had a least inhibitory effect on all studied traits”
t0“rice”
Claim · model-written summary
Authors suggest phenolic acids such as p-hydroxybenzoicacid may contribute to rice growth inhibition.
- Taxon
- riceOryza sativae1
- Compound
- p-hydroxybenzoicacide0
- Outcome
- growth inhibitione1
- Qualifier
- could play the key rolese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“phenolic acids such as p-hydroxybenzoicacid could play the key roles, because of this compound detected in higher range than the other allelocemicals”
e1“observed growth inhibition of rice”
The same questions in other papers
allelopathy · Echinochloa crus-galli · Oryza sativa (rice)Positive and negative results
6 in the opposite direction
- positive
- positive
- positive
3 papers more in this group
See all 7 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.