Abstract
Two allelopathic rice accessions, PI312777 and Allelopathy 1, could significantly suppress the growth of associated weeds in the field. Moreover, their weed-suppressing effects were correlated with the cultivated patterns. The weed-suppressing effects of the throwing and transplanting were more effective than that of the direct seeding in the field. Furthermore, the amounts of allelochemicals (resorcinol, flavone and hydroxamic acid) produced and released from the two allelopathic rice accessions were much higher than that from the non-allelopathic rice variety Huajingxian 1, and reached the maximum values at the 6th leaf stage. Obviously, the differences of weed-suppressing effects of rice accessions resulted from their different amounts of allelochemicals produced and released in the field. Further research confirmed that allelochemicals of PI312777 plants were synthesized by their above-ground parts, and then secreted through their root tissues. Root tissues of PI312777 plants never produce the allelochemicals. Root exudates from PI312777 significantly inhibited the growth of barnyard grass surrounding rice plants under water culture. However, the culture solution treated with activated carbon, which could absorb allelochemicals from root exudates, the growth of barnyard grass had no longer to be significantly inhibited. Actually, weed-suppressing effects of rice accessions depended on allelopathy, cultivated patterns and other factors in rice fields, while allelopathy was one of the important factors. Interestingly, the amount of allelochemicals produced and released from allelopathic rice plants could be induced by associated barnyard grass. It suggested that there was a possible chemical recognition between rice and barnyard grass.
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Claims 12
Claim · model-written summary
Allelopathic rice accessions significantly suppressed the growth of associated weeds in the field
- Taxon
- rice
Oryza sativae1 - Material
- PI312777 and Allelopathy 1e1
- Treatment
- allelopathic rice accessionse1
- Interactor
- weedse1weed
- Outcome
- growth of associated weedse1
- Direction
- suppresse1
- Setting
- in the fielde1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Two allelopathic rice accessions, PI312777 and Allelopathy 1, could significantly suppress the growth of associated weeds in the field”
Claim · model-written summary
Weed-suppressing effects of rice accessions were correlated with cultivation pattern
- Taxon
- riceOryza sativae1
- Treatment
- cultivated patternse2
- Outcome
- weed-suppressing effectse2
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Two allelopathic rice accessions, PI312777 and Allelopathy 1, could significantly suppress the growth of associated weeds in the field”
e2“their weed-suppressing effects were correlated with the cultivated patterns”
Claim · model-written summary
Throwing and transplanting gave stronger weed suppression than direct seeding in rice in the field
- Taxon
- riceOryza sativae1
- Treatment
- throwing and transplantinge2
- Outcome
- weed-suppressing effectse2
- Direction
- more effectivee2
- Comparator
- direct seedinge2
- Setting
- in the fielde2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Two allelopathic rice accessions, PI312777 and Allelopathy 1, could significantly suppress the growth of associated weeds in the field”
e2“The weed-suppressing effects of the throwing and transplanting were more effective than that of the direct seeding in the field”
Claim · model-written summary
Allelochemical amounts (resorcinol, flavone and hydroxamic acid) were much higher in the allelopathic rice accessions than in Huajingxian 1
- Taxon
- riceOryza sativae1
- Treatment
- allelopathic rice accessionse3
- Compound
- resorcinol, flavone and hydroxamic acide3
- Outcome
- amounts of allelochemicalse3
- Direction
- much highere3
- Comparator
- non-allelopathic rice variety Huajingxian 1e3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Two allelopathic rice accessions, PI312777 and Allelopathy 1, could significantly suppress the growth of associated weeds in the field”
e3“the amounts of allelochemicals (resorcinol, flavone and hydroxamic acid) produced and released from the two allelopathic rice accessions were much higher than that from the non-allelopathic rice variety Huajingxian 1”
Claim · model-written summary
Allelochemical amounts in rice accessions reached their maximum at the 6th leaf stage
- Taxon
- riceOryza sativae1
- Organ / stage
- 6th leaf stagee4
- Outcome
- amounts of allelochemicalse3
- Direction
- maximume4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Two allelopathic rice accessions, PI312777 and Allelopathy 1, could significantly suppress the growth of associated weeds in the field”
e3“the amounts of allelochemicals (resorcinol, flavone and hydroxamic acid) produced and released from the two allelopathic rice accessions were much higher than that from the non-allelopathic rice variety Huajingxian 1”
e4“reached the maximum values at the 6th leaf stage”
Claim · model-written summary
Differences in weed suppression among rice accessions resulted from their different allelochemical amounts in the field
- Taxon
- riceOryza sativae5
- Outcome
- weed-suppressing effectse5
- Qualifier
- different amounts of allelochemicals produced and released in the fielde5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Two allelopathic rice accessions, PI312777 and Allelopathy 1, could significantly suppress the growth of associated weeds in the field”
e5“the differences of weed-suppressing effects of rice accessions resulted from their different amounts of allelochemicals produced and released in the field”
Claim · model-written summary
Allelochemicals of PI312777 are synthesized in above-ground parts and secreted through root tissues
- Taxon
- riceOryza sativae1
- Material
- PI312777e6
- Organ / stage
- above-ground partse6
- Outcome
- allelochemicals of PI312777 plants were synthesizede6
- Qualifier
- secreted through their root tissuese6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Two allelopathic rice accessions, PI312777 and Allelopathy 1, could significantly suppress the growth of associated weeds in the field”
e6“Further research confirmed that allelochemicals of PI312777 plants were synthesized by their above-ground parts, and then secreted through their root tissues”
Claim · model-written summary
Root tissues of PI312777 do not produce allelochemicals
- Taxon
- riceOryza sativae1
- Material
- PI312777e7
- Organ / stage
- Root tissuese7
- Outcome
- produce the allelochemicalse7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Two allelopathic rice accessions, PI312777 and Allelopathy 1, could significantly suppress the growth of associated weeds in the field”
e7“Root tissues of PI312777 plants never produce the allelochemicals”
Claim · model-written summary
Root exudates from PI312777 significantly inhibited barnyard grass growth in water culture
- Taxon
- riceOryza sativae1
- Treatment
- Root exudates from PI312777e2
- Interactor
- barnyard grass
Echinochloa crus-gallie2weed - Outcome
- growth of barnyard grasse2
- Direction
- inhibitede2
- Setting
- under water culturee2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Two allelopathic rice accessions, PI312777 and Allelopathy 1, could significantly suppress the growth of associated weeds in the field”
e2“Root exudates from PI312777 significantly inhibited the growth of barnyard grass surrounding rice plants under water culture”
Claim · model-written summary
Barnyard grass growth was no longer significantly inhibited when root exudate allelochemicals were absorbed by activated carbon
- Taxon
- riceOryza sativae1
- Treatment
- activated carbone2
- Interactor
- barnyard grassEchinochloa crus-gallie2weed
- Outcome
- growth of barnyard grasse2
- Direction
- no longer to be significantly inhibitede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Two allelopathic rice accessions, PI312777 and Allelopathy 1, could significantly suppress the growth of associated weeds in the field”
e2“the culture solution treated with activated carbon, which could absorb allelochemicals from root exudates, the growth of barnyard grass had no longer to be significantly inhibited”
Claim · model-written summary
Allelochemical production from rice was induced by associated barnyard grass
- Taxon
- riceOryza sativae1
- Treatment
- associated barnyard grasse2
- Interactor
- barnyard grassEchinochloa crus-gallie2weed
- Outcome
- amount of allelochemicalse2
- Direction
- inducede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Two allelopathic rice accessions, PI312777 and Allelopathy 1, could significantly suppress the growth of associated weeds in the field”
e2“the amount of allelochemicals produced and released from allelopathic rice plants could be induced by associated barnyard grass”
Claim · model-written summary
A possible chemical recognition operates between rice and barnyard grass
- Taxon
- riceOryza sativae1
- Interactor
- barnyard grassEchinochloa crus-gallie2weed
- Outcome
- chemical recognitione2
- Qualifier
- possible chemical recognitione2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Two allelopathic rice accessions, PI312777 and Allelopathy 1, could significantly suppress the growth of associated weeds in the field”
e2“there was a possible chemical recognition between rice and barnyard grass”
The same questions in other papers
allelopathy · Echinochloa crus-galli · Oryza sativa (rice)Positive and negative results
5 papers in the same direction as this paper · 1 in the opposite direction
- negative
- positive
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3 papers more in this group
See all 7 papers →transplanting · weed · Oryza sativa (rice)Positive and negative results
128 papers in the same direction as this paper · 16 in the opposite direction · 1 reporting no difference from an alternative
- negative
- negative
- negative
142 papers more in this group
See all 146 papers →allelopathy · weed · Oryza sativa (rice)Results agree
1 paper in the same direction as this paper
- positive
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.