Abstract
ABSTRACT: Herbicide application is an effective weed control method for mitigating crop yield loss; however, herbicide overuse can cause toxicity in non-target plants. The present study evaluated the effects of glufosinate at recommended dose for agricultural application (0.45 kg ha-1) and at overuse dose (0.90 kg ha-1) glufosinate application on photosynthetic performance and nitrogen assimilation of the rapeseed varieties D148 and Zhongshuang 11 (ZS11). Both glufosinate concentrations significantly decreased the content of chlorophyll and nitrogenous compounds, except free proline, and the activity of glutamine synthetase and glutamate synthase, and increased the activity of glutamic acid dehydrogenase in both varieties. When the concentration of glyphosate was 0.45kg ha-1, the nitrogen assimilation of the two varieties decreased, which indicated that the recommended dosage inhibited the nitrogen assimilation of the two varieties; however, the increase of net photosynthetic rate of D148 and the decrease of that of ZS11 mean that D148 is more tolerant to the recommended dose of glyphosate than ZS11. The 0.90 kg ha-1 dosage was toxic to both rapeseed varieties. Overall, our results indicated that herbicide overuse inhibited the photosynthetic rate and nitrogen assimilation in rapeseed seedlings, and it is essential to apply a suitable glufosinate dose based on the variety grown to minimize adverse effects on crops and environment.
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Claims 10
Claim · model-written summary
Both glufosinate concentrations decreased chlorophyll and nitrogenous compound content in both rapeseed varieties.
- Taxon
- rapeseedt0
- Treatment
- glufosinate concentrationse0
- Outcome
- content of chlorophyll and nitrogenous compoundse0
- Direction
- decreasede0
- Qualifier
- except free prolinee0
Not reportedComparator
Verbatim
e0“Both glufosinate concentrations significantly decreased the content of chlorophyll and nitrogenous compounds, except free proline”
e1“in both varieties”
t0“rapeseed seedlings”
Claim · model-written summary
Both glufosinate concentrations decreased glutamine synthetase and glutamate synthase activity in both varieties.
- Taxon
- rapeseedt0
- Treatment
- glufosinate concentrationse0
- Gene
- glutamine synthetase and glutamate synthasee0
- Outcome
- activity of glutamine synthetase and glutamate synthasee0
- Direction
- decreasede0
Not reportedComparator
Verbatim
e0“Both glufosinate concentrations significantly decreased the content of chlorophyll and nitrogenous compounds, except free proline, and the activity of glutamine synthetase and glutamate synthase”
t0“rapeseed seedlings”
Claim · model-written summary
Both glufosinate concentrations increased glutamic acid dehydrogenase activity in both varieties.
- Taxon
- rapeseedt0
- Treatment
- glufosinate concentrationse0
- Gene
- glutamic acid dehydrogenasee0
- Outcome
- activity of glutamic acid dehydrogenasee0
- Direction
- increasede0
Not reportedComparator
Verbatim
e0“Both glufosinate concentrations significantly decreased the content of chlorophyll and nitrogenous compounds, except free proline, and the activity of glutamine synthetase and glutamate synthase, and increased the activity of glutamic acid dehydrogenase in both varieties”
t0“rapeseed seedlings”
Claim · model-written summary
At 0.45kg ha-1 glyphosate, nitrogen assimilation decreased in both varieties.
- Taxon
- rapeseedt0
- Treatment
- glyphosate was 0.45kg ha-1e0
- Outcome
- nitrogen assimilatione0
- Direction
- decreasede0
Not reportedComparator
Verbatim
e0“When the concentration of glyphosate was 0.45kg ha-1, the nitrogen assimilation of the two varieties decreased”
t0“rapeseed seedlings”
Claim · model-written summary
At the recommended dose, net photosynthetic rate increased in D148.
- Taxon
- rapeseedt0
- Material
- D148e0
- Treatment
- recommended dose of glyphosatee1
- Outcome
- net photosynthetic ratee0
- Direction
- increasee0
Not reportedComparator
Verbatim
e0“the increase of net photosynthetic rate of D148”
e1“recommended dose of glyphosate”
t0“rapeseed seedlings”
Claim · model-written summary
At the recommended dose, net photosynthetic rate decreased in ZS11.
- Taxon
- rapeseedt0
- Material
- ZS11e0
- Treatment
- recommended dose of glyphosatee1
- Outcome
- net photosynthetic ratee2
- Direction
- decreasee0
Not reportedComparator
Verbatim
e0“the decrease of that of ZS11”
e1“recommended dose of glyphosate”
e2“net photosynthetic rate”
t0“rapeseed seedlings”
Claim · model-written summary
D148 was more tolerant of the recommended glyphosate dose than ZS11.
Verbatim
e0“D148 is more tolerant to the recommended dose of glyphosate than ZS11”
t0“rapeseed seedlings”
Claim · model-written summary
The 0.90 kg ha-1 dosage was toxic to both rapeseed varieties.
Not reportedDirection
Verbatim
e0“The 0.90 kg ha-1 dosage was toxic to both rapeseed varieties”
Claim · model-written summary
Herbicide overuse inhibited photosynthetic rate and nitrogen assimilation in rapeseed seedlings.
- Taxon
- rapeseede0
- Treatment
- herbicide overusee0
- Outcome
- photosynthetic rate and nitrogen assimilatione0
- Direction
- inhibitede0
Not reportedComparator
Verbatim
e0“herbicide overuse inhibited the photosynthetic rate and nitrogen assimilation in rapeseed seedlings”
Claim · model-written summary
The authors recommend a suitable glufosinate dose based on variety to minimize adverse effects.
Verbatim
e0“it is essential to apply a suitable glufosinate dose based on the variety grown to minimize adverse effects on crops and environment”
t0“rapeseed seedlings”
The same questions in other papers
glufosinate · molecular: metabolites · Brassica napus (oilseed rape)Results agree
1 paper in the same direction as this paper
- negative
glyphosate · physiology: photosynthesis · Brassica napus (oilseed rape)Results agree
1 paper in the same direction as this paper
- positive
herbicide · physiology: photosynthesis · Brassica napus (oilseed rape)Results agree
1 paper in the same direction as this paper
- negative
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.