Abstract
Cotton stalks were inoculated with some rhizospheric soil and decomposed under the temperature of 35 ℃.After decomposing 60 hours,the decomposing products were extracted by mixture of acetone and ethyl acetate in 5 days.The extract was concentrated and then subjected to bio-assay and chemical constituents analysis by GC-MS technique.The results indicated that cotton stalk decomposing products showed allelopathy on seed germination and seedling growth.It was observed that under concentration of 0.5 g·L-1,1.0 g·L-1,1.5 g·L-1 extract,the seed germination was constrained under higher concentration but promoted under lower concentration.The cotton stalk decomposing products showed significant inhibition on seedling growth(P 0.01)even under the concentration of 0.5 g·L-1.And weakened root vigor,reduced chlorophyll contents and declined fresh weight and plant height were found when the extract added into hydroponic culture.A lethal effect on tested cotton seedling was observed when the concentration of extract in nutrition solution reached to 1.5 g·L-1.Activities of SOD and POD were induced at lower concentration but inhibited by higher concentrations of the extract.Higher contents of MDA were also found in higher concentration extract treatments.Total of 24 main constituents were detected in cotton stalk decomposing products by GC-MS analysis,the predominant constituents including 4-hydroxy-4-methyl-2-pentanone(27.31%),dibutyl phthalate(7.87%),hexadecanoic acid(6.69%),butanedioic acid,methyl-,bis(1-methylpropyl)ester(6.40%),9,12-octadecadienoic acid(Z,Z)-(5.43%),etc.Several of them have been identified as allelochemicals which were frequently reported.
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Claims 16
Claim · model-written summary
High extract concentration constrained cotton seed germination.
- Taxon
- cotton
Gossypium hirsutumt0 - Treatment
- higher concentratione0
- Outcome
- seed germinatione0
- Direction
- constrainede0
- Comparator
- lower concentratione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the seed germination was constrained under higher concentration but promoted under lower concentration.”
t0“Cotton”
Claim · model-written summary
Low extract concentration promoted cotton seed germination.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- lower concentratione0
- Outcome
- seed germinatione0
- Direction
- promotede0
- Comparator
- higher concentratione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the seed germination was constrained under higher concentration but promoted under lower concentration.”
t0“Cotton”
Claim · model-written summary
Extract significantly inhibited seedling growth even at 0.5 g·L-1.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- cotton stalk decomposing productse0
- Outcome
- seedling growthe0
- Direction
- inhibitione0
- Value
- 0.5 g·L-1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The cotton stalk decomposing products showed significant inhibition on seedling growth(P 0.01)even under the concentration of 0.5 g·L-1.”
Claim · model-written summary
Extract in hydroponic culture weakened cotton root vigor.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- extract added into hydroponic culturee0
- Outcome
- root vigore0
- Direction
- weakenede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“weakened root vigor,reduced chlorophyll contents and declined fresh weight and plant height were found when the extract added into hydroponic culture.”
t0“Cotton”
Claim · model-written summary
Extract in hydroponic culture reduced cotton chlorophyll content.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- extract added into hydroponic culturee0
- Outcome
- chlorophyll contentse0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“weakened root vigor,reduced chlorophyll contents and declined fresh weight and plant height were found when the extract added into hydroponic culture.”
t0“Cotton”
Claim · model-written summary
Extract in hydroponic culture decreased cotton fresh weight and height.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- extract added into hydroponic culturee0
- Outcome
- fresh weight and plant heighte0
- Direction
- declinede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“weakened root vigor,reduced chlorophyll contents and declined fresh weight and plant height were found when the extract added into hydroponic culture.”
t0“Cotton”
Claim · model-written summary
Extract at 1.5 g·L-1 in nutrient solution was lethal to tested cotton seedlings.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- extract in nutrition solutione0
- Outcome
- lethal effect on tested cotton seedlinge0
- Value
- 1.5 g·L-1e0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A lethal effect on tested cotton seedling was observed when the concentration of extract in nutrition solution reached to 1.5 g·L-1.”
Claim · model-written summary
Low extract concentration induced SOD and POD activity.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- lower concentratione0
- Outcome
- Activities of SOD and PODe0
- Direction
- inducede0
- Comparator
- higher concentrations of the extracte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Activities of SOD and POD were induced at lower concentration but inhibited by higher concentrations of the extract.”
t0“Cotton”
Claim · model-written summary
High extract concentration inhibited SOD and POD activity.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- higher concentrations of the extracte0
- Outcome
- Activities of SOD and PODe0
- Direction
- inhibitede0
- Comparator
- lower concentratione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Activities of SOD and POD were induced at lower concentration but inhibited by higher concentrations of the extract.”
t0“Cotton”
Claim · model-written summary
High extract concentration increased MDA content.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- higher concentration extract treatmentse0
- Outcome
- contents of MDAe0
- Direction
- Highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Higher contents of MDA were also found in higher concentration extract treatments.”
t0“Cotton”
Claim · model-written summary
GC-MS detected 24 main constituents in cotton stalk decomposition products.
- Taxon
- cottonGossypium hirsutume0
- Outcome
- main constituentse0
- Value
- 24e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Total of 24 main constituents were detected in cotton stalk decomposing products by GC-MS analysis”
Claim · model-written summary
4-hydroxy-4-methyl-2-pentanone was a predominant constituent at 27.31%.
- Taxon
- cottonGossypium hirsutumt0
- Outcome
- 4-hydroxy-4-methyl-2-pentanonee0
- Value
- 27.31%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“4-hydroxy-4-methyl-2-pentanone(27.31%)”
t0“Cotton”
Claim · model-written summary
Dibutyl phthalate was a predominant constituent at 7.87%.
- Taxon
- cottonGossypium hirsutumt0
- Outcome
- dibutyl phthalatee0
- Value
- 7.87%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“dibutyl phthalate(7.87%)”
t0“Cotton”
Claim · model-written summary
Hexadecanoic acid was a predominant constituent at 6.69%.
- Taxon
- cottonGossypium hirsutumt0
- Outcome
- hexadecanoic acide0
- Value
- 6.69%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“hexadecanoic acid(6.69%)”
t0“Cotton”
Claim · model-written summary
Butanedioic acid,methyl-,bis(1-methylpropyl)ester was a predominant constituent at 6.40%.
- Taxon
- cottonGossypium hirsutumt0
- Outcome
- butanedioic acid,methyl-,bis(1-methylpropyl)estere0
- Value
- 6.40%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“butanedioic acid,methyl-,bis(1-methylpropyl)ester(6.40%)”
t0“Cotton”
Claim · model-written summary
9,12-octadecadienoic acid(Z,Z)- was a predominant constituent at 5.43%.
- Taxon
- cottonGossypium hirsutumt0
- Outcome
- 9,12-octadecadienoic acid(Z,Z)-e0
- Value
- 5.43%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“9,12-octadecadienoic acid(Z,Z)-(5.43%)”
t0“Cotton”
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