Abstract
Effects of O3 stress on visible injury symptom,nitrogen metabolism,and the contents of proline and glutathione of winter wheat leaves were studied by open top chambers(OTC).The results showed that O3 stress could induce significant damage to winter wheat leaves and the injury symptom was more serious under higher concentration of O3.The activities of nitrate reductase in leaves of winter wheat reduced with increasing the concentration of O3.Compared to the control treatment,at the O3concentrations of 40~120 nL.L-1,the activities of nitrate reductase decreased respectively by 45.4%~92.9%,58.0%~93.5% and 90.0%~93.2% in the jointing stage,the heading stage and the milk stage of winter wheat.O3stress also had significant effects on the contents of NH4+-N and NO3--N in winter wheat leaves,but the effects were different under different O3 concentrations or different growth stages.The contents of proline and glutathione varied under different O3 concentrations.Compared to the control treatment,proline contents in leaves of winter wheat in the heading stage increased respectively by 163.9% and 173.2% at the O3concentrations of 40 nL.L-1and 80 nL.L-1,while decreased by 42.4% at the O3concentration of 120 nL.L-1.O3 stress resulted in increase of GSH contents in leaves of winter wheat in the jointing stage,while GSH contents in leaves of winter wheat in the heading stage decreased significantly compared with the control group under elevated O3.This study suggests that plants show different adjustment and adaptation mechanism under O3stress.
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Claims 14
Claim · model-written summary
Ozone stress induced significant damage to winter wheat leaves.
- Taxon
- winter wheat
Triticum aestivume0 - Treatment
- O3 stresse0
- Outcome
- damage to winter wheat leavese0
- Direction
- increaseinferrede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“O3 stress could induce significant damage to winter wheat leaves and the injury symptom was more serious under higher concentration of O3”
Claim · model-written summary
The injury symptom in winter wheat was more serious under higher ozone concentration.
- Taxon
- winter wheatTriticum aestivume0
- Treatment
- higher concentration of O3e0
- Outcome
- injury symptome0
- Direction
- more seriouse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“O3 stress could induce significant damage to winter wheat leaves and the injury symptom was more serious under higher concentration of O3”
Claim · model-written summary
Nitrate reductase activity in winter wheat leaves decreased with increasing ozone concentration.
- Taxon
- winter wheatTriticum aestivume0
- Organ / stage
- leavese0
- Treatment
- concentration of O3e0
- Outcome
- activities of nitrate reductasee0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The activities of nitrate reductase in leaves of winter wheat reduced with increasing the concentration of O3”
Claim · model-written summary
At 40-120 nL.L-1 ozone, nitrate reductase activity in winter wheat decreased by 45.4%-92.9% at the jointing stage relative to control.
- Taxon
- winter wheatTriticum aestivume0
- Organ / stage
- jointing stagee0
- Treatment
- 40~120 nL.L-1e0
- Outcome
- activities of nitrate reductasee0
- Direction
- decreasede0
- Value
- 45.4%~92.9%e0
- Comparator
- control treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared to the control treatment,at the O3concentrations of 40~120 nL.L-1,the activities of nitrate reductase decreased respectively by 45.4%~92.9%,58.0%~93.5% and 90.0%~93.2% in the jointing stage,the heading stage and the milk stage of winter wheat”
Claim · model-written summary
At 40-120 nL.L-1 ozone, nitrate reductase activity in winter wheat decreased by 58.0%-93.5% at the heading stage relative to control.
- Taxon
- winter wheatTriticum aestivume0
- Organ / stage
- heading stagee0
- Treatment
- 40~120 nL.L-1e0
- Outcome
- activities of nitrate reductasee0
- Direction
- decreasede0
- Value
- 58.0%~93.5%e0
- Comparator
- control treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared to the control treatment,at the O3concentrations of 40~120 nL.L-1,the activities of nitrate reductase decreased respectively by 45.4%~92.9%,58.0%~93.5% and 90.0%~93.2% in the jointing stage,the heading stage and the milk stage of winter wheat”
Claim · model-written summary
At 40-120 nL.L-1 ozone, nitrate reductase activity in winter wheat decreased by 90.0%-93.2% at the milk stage relative to control.
- Taxon
- winter wheatTriticum aestivume0
- Organ / stage
- milk stagee0
- Treatment
- 40~120 nL.L-1e0
- Outcome
- activities of nitrate reductasee0
- Direction
- decreasede0
- Value
- 90.0%~93.2%e0
- Comparator
- control treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared to the control treatment,at the O3concentrations of 40~120 nL.L-1,the activities of nitrate reductase decreased respectively by 45.4%~92.9%,58.0%~93.5% and 90.0%~93.2% in the jointing stage,the heading stage and the milk stage of winter wheat”
Claim · model-written summary
Ozone stress had significant effects on NH4+-N and NO3--N contents in winter wheat leaves, which differed among ozone concentrations and growth stages.
- Taxon
- winter wheatTriticum aestivume0
- Organ / stage
- leavese0
- Treatment
- O3 stresse0
- Outcome
- contents of NH4+-N and NO3--Ne0
- Qualifier
- effects were different under different O3 concentrations or different growth stagese0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“O3stress also had significant effects on the contents of NH4+-N and NO3--N in winter wheat leaves,but the effects were different under different O3 concentrations or different growth stages”
Claim · model-written summary
Proline and glutathione contents varied under different ozone concentrations.
- Taxon
- Winter WheatTriticum aestivumt0
- Treatment
- different O3 concentrationse1
- Outcome
- contents of proline and glutathionee1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Winter Wheat Leaves”
e1“The contents of proline and glutathione varied under different O3 concentrations”
Claim · model-written summary
Proline content in winter wheat leaves at the heading stage increased by 163.9% at 40 nL.L-1 ozone relative to control.
- Taxon
- winter wheatTriticum aestivume0
- Organ / stage
- heading stagee0
- Treatment
- 40 nL.L-1e0
- Outcome
- proline contentse0
- Direction
- increasede0
- Value
- 163.9%e0
- Comparator
- control treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared to the control treatment,proline contents in leaves of winter wheat in the heading stage increased respectively by 163.9% and 173.2% at the O3concentrations of 40 nL.L-1and 80 nL.L-1,while decreased by 42.4% at the O3concentration of 120 nL.L-1”
Claim · model-written summary
Proline content in winter wheat leaves at the heading stage increased by 173.2% at 80 nL.L-1 ozone relative to control.
- Taxon
- winter wheatTriticum aestivume0
- Organ / stage
- heading stagee0
- Treatment
- 80 nL.L-1e0
- Outcome
- proline contentse0
- Direction
- increasede0
- Value
- 173.2%e0
- Comparator
- control treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared to the control treatment,proline contents in leaves of winter wheat in the heading stage increased respectively by 163.9% and 173.2% at the O3concentrations of 40 nL.L-1and 80 nL.L-1,while decreased by 42.4% at the O3concentration of 120 nL.L-1”
Claim · model-written summary
Proline content in winter wheat leaves at the heading stage decreased by 42.4% at 120 nL.L-1 ozone relative to control.
- Taxon
- winter wheatTriticum aestivume0
- Organ / stage
- heading stagee0
- Treatment
- 120 nL.L-1e0
- Outcome
- proline contentse0
- Direction
- decreasede0
- Value
- 42.4%e0
- Comparator
- control treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared to the control treatment,proline contents in leaves of winter wheat in the heading stage increased respectively by 163.9% and 173.2% at the O3concentrations of 40 nL.L-1and 80 nL.L-1,while decreased by 42.4% at the O3concentration of 120 nL.L-1”
Claim · model-written summary
Ozone stress increased glutathione contents in winter wheat leaves at the jointing stage.
- Taxon
- winter wheatTriticum aestivume0
- Organ / stage
- jointing stagee0
- Treatment
- O3 stresse0
- Outcome
- GSH contentse0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“O3 stress resulted in increase of GSH contents in leaves of winter wheat in the jointing stage,while GSH contents in leaves of winter wheat in the heading stage decreased significantly compared with the control group under elevated O3”
Claim · model-written summary
Glutathione contents in winter wheat leaves at the heading stage decreased significantly under elevated ozone compared with control.
- Taxon
- winter wheatTriticum aestivume0
- Organ / stage
- heading stagee0
- Treatment
- elevated O3e0
- Outcome
- GSH contentse0
- Direction
- decreasede0
- Comparator
- control groupe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“O3 stress resulted in increase of GSH contents in leaves of winter wheat in the jointing stage,while GSH contents in leaves of winter wheat in the heading stage decreased significantly compared with the control group under elevated O3”
Claim · model-written summary
Winter wheat shows different adjustment and adaptation mechanisms under ozone stress.
- Taxon
- Winter WheatTriticum aestivumt0
- Outcome
- adjustment and adaptation mechanisme1
- Qualifier
- under O3stresse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Winter Wheat Leaves”
e1“This study suggests that plants show different adjustment and adaptation mechanism under O3stress”
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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.