Abstract
With spring wheat variety liaochun 10 as materials,the pot experiment was conducted to study the effects of nitrogen nutrition on flag leaves senescence at the tilling stage under different soil water content.The results showed that with the increase of water stress,superoxide dismutase(SOD) activity reduced,O2·KG-1*2-producing rate,exosmic conductance ratio and malondiadehyde(MDA) content increased,while peroxidase(POD) activity decreased firstly and rose consequently,so leads to flag leaf senescence.Under the conditions of relative soil water content less than 45 percent,SOD activity in flag leaves decreased significantly,but POD activity was doubled comparing with the treatment of normal soil water content.This indicated the elimination system of the active oxygen was destroyed.The increase of N fertilizer made O2·KG-1*2-producing rate,exosmic conductance ratio and MDA content increased,resulting in the leaf senescence process enhanced.The efficiencies of N fertilizer were contrary when the relative soil water content was between 45 and 75 percent.The increase of the N fertilizer and SRWC increased the efficiency of N fertilizer.The above ground part grew thriftily and their transpiration rate were higher under the conditions of excess N fertilizer and relative soil water content beyond 75 percent.The shortage of water supply made SOD,POD activity reduced and O2·KG-1*2-producing rate,exosmic conductance ratio and MDA content increased.
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Claims 7
Claim · model-written summary
Under relative soil water content below 45 percent, SOD activity in flag leaves decreased significantly compared with normal soil water content
- Taxon
- Spring Wheat
Triticum aestivumt0 - Material
- Liaochun 10t0
- Organ / stage
- flag leavese1
- Treatment
- relative soil water content less than 45 percente1
- Outcome
- SOD activitye1
- Direction
- decreasede1
- Comparator
- normal soil water contente1
- Setting
- pot experimente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the pot experiment was conducted”
e1“Under the conditions of relative soil water content less than 45 percent,SOD activity in flag leaves decreased significantly,but POD activity was doubled comparing with the treatment of normal soil water content”
t0“Flag Leaves Senescence of Spring Wheat Liaochun 10”
Claim · model-written summary
Under relative soil water content below 45 percent, POD activity in flag leaves doubled compared with normal soil water content
- Taxon
- Spring WheatTriticum aestivumt0
- Material
- Liaochun 10t0
- Organ / stage
- flag leavese1
- Treatment
- relative soil water content less than 45 percente1
- Outcome
- POD activitye1
- Direction
- doublede1
- Comparator
- normal soil water contente1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Under the conditions of relative soil water content less than 45 percent,SOD activity in flag leaves decreased significantly,but POD activity was doubled comparing with the treatment of normal soil water content”
t0“Flag Leaves Senescence of Spring Wheat Liaochun 10”
Claim · model-written summary
Increasing water stress increased O2 producing rate, exosmic conductance ratio and MDA content in wheat leaves
- Taxon
- Spring WheatTriticum aestivumt0
- Material
- Liaochun 10t0
- Treatment
- water stresse2
- Outcome
- O2·KG-1*2-producing rate,exosmic conductance ratio and malondiadehyde(MDA) contente2
- Direction
- increasede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“with the increase of water stress,superoxide dismutase(SOD) activity reduced,O2·KG-1*2-producing rate,exosmic conductance ratio and malondiadehyde(MDA) content increased,while peroxidase(POD) activity decreased firstly and rose consequently”
t0“Flag Leaves Senescence of Spring Wheat Liaochun 10”
Claim · model-written summary
Increasing water stress first decreased and then increased POD activity
- Taxon
- Spring WheatTriticum aestivumt0
- Material
- Liaochun 10t0
- Treatment
- water stresse2
- Outcome
- peroxidase(POD) activitye2
- Direction
- decreased firstly and rose consequentlye2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“with the increase of water stress,superoxide dismutase(SOD) activity reduced,O2·KG-1*2-producing rate,exosmic conductance ratio and malondiadehyde(MDA) content increased,while peroxidase(POD) activity decreased firstly and rose consequently”
t0“Flag Leaves Senescence of Spring Wheat Liaochun 10”
Claim · model-written summary
Increasing N fertilizer enhanced leaf senescence
- Taxon
- Spring WheatTriticum aestivumt0
- Material
- Liaochun 10t0
- Treatment
- increase of N fertilizere3
- Outcome
- leaf senescence processe3
- Direction
- enhancede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“The increase of N fertilizer made O2·KG-1*2-producing rate,exosmic conductance ratio and MDA content increased,resulting in the leaf senescence process enhanced”
t0“Flag Leaves Senescence of Spring Wheat Liaochun 10”
Claim · model-written summary
Increasing N fertilizer and relative soil water content increased the efficiency of N fertilizer
- Taxon
- Spring WheatTriticum aestivumt0
- Material
- Liaochun 10t0
- Treatment
- The increase of the N fertilizer and SRWCe4
- Outcome
- efficiency of N fertilizere4
- Direction
- increasede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“The increase of the N fertilizer and SRWC increased the efficiency of N fertilizer”
t0“Flag Leaves Senescence of Spring Wheat Liaochun 10”
Claim · model-written summary
Under excess N fertilizer and relative soil water content above 75 percent, transpiration rate of wheat was higher and the above-ground part grew thriftily
- Taxon
- Spring WheatTriticum aestivumt0
- Material
- Liaochun 10t0
- Organ / stage
- above ground parte5
- Treatment
- excess N fertilizer and relative soil water content beyond 75 percente5
- Outcome
- transpiration ratee5
- Direction
- highere5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“The above ground part grew thriftily and their transpiration rate were higher under the conditions of excess N fertilizer and relative soil water content beyond 75 percent”
t0“Flag Leaves Senescence of Spring Wheat Liaochun 10”
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