Abstract
Super hybrid rice Gangyou 527 was used to investigate the effects of three irrigation regimes [submerged irrigation(W1),dry cultivation(W3) and the treatment W2 that damp irrigation before booting stage,shallow irrigation at booting stage,wetting-drying alternation irrigation from heading stage to mature stage] and different amounts of N on net photosynthetic rate(Pn),activated oxygen(O-·2)and H2O2,malondialdehyde(MDA),osmotic regulators,antioxidant enzyme activities in flag leaves and bleeding intensity during grain filling.The correlation of the different physiological index and accumulation of dry-matter and transport was also determined.The results showed that compare with other treatments,W2 and suitable N application amount(180 kg/ha) delayed the increase of reactive oxygen species and MDA,had high Pn and promoted the accumulation of soluble protein content,etc.,and enhanced the superoxide(SOD),catalase(CAT) and peroxidase(POD) activities,consequently,promoted material accumulation and promote yield.Applying N(270 kg/ha) resulted in a negative effect of waternitrogen interaction.As for the treatment of dry cultivation of rice,applying N ranged from 90 to 180 kg/ha could alleviate the negative effect of water-nitrogen interaction,which has practical implications for drought regions.In addition,there was significant correlation between the physiological index,in which significant positive correlations was observed between O-·2,H2O2 and MDA,and a significant negative correlation between them with antioxidant enzyme activities,Pn and soluble protein content.Furthermore,in the process of leave senescence,underground was closely related to aboveground,and root vigor had high significant positive correlation with antioxidant enzyme activities,Pn and soluble protein,but it had high significant negative correlation with O-· 2 ,H2O2 and MDA.
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Claims 13
Claim · model-written summary
W2 irrigation with a suitable N amount (180 kg/ha) delayed the increase of reactive oxygen species and MDA relative to other treatments.
- Taxon
- rice
Oryza sativat0 - Treatment
- W2 and suitable N application amount(180 kg/ha)e1
- Outcome
- increase of reactive oxygen species and MDAe1
- Direction
- delayede1
- Comparator
- other treatmentse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice senescence”
e1“compare with other treatments,W2 and suitable N application amount(180 kg/ha) delayed the increase of reactive oxygen species and MDA,had high Pn and promoted the accumulation of soluble protein content”
Claim · model-written summary
W2 with a suitable N amount (180 kg/ha) had high net photosynthetic rate (Pn) relative to other treatments.
- Taxon
- riceOryza sativat0
- Treatment
- W2 and suitable N application amount(180 kg/ha)e1
- Outcome
- Pne1
- Direction
- highe1
- Comparator
- other treatmentse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice senescence”
e1“compare with other treatments,W2 and suitable N application amount(180 kg/ha) delayed the increase of reactive oxygen species and MDA,had high Pn and promoted the accumulation of soluble protein content”
Claim · model-written summary
W2 with a suitable N amount (180 kg/ha) promoted the accumulation of soluble protein content relative to other treatments.
- Taxon
- riceOryza sativat0
- Treatment
- W2 and suitable N application amount(180 kg/ha)e1
- Outcome
- accumulation of soluble protein contente1
- Direction
- promotede1
- Comparator
- other treatmentse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice senescence”
e1“compare with other treatments,W2 and suitable N application amount(180 kg/ha) delayed the increase of reactive oxygen species and MDA,had high Pn and promoted the accumulation of soluble protein content”
Claim · model-written summary
W2 with a suitable N amount (180 kg/ha) enhanced superoxide, catalase and peroxidase activities relative to other treatments.
- Taxon
- riceOryza sativat0
- Treatment
- W2 and suitable N application amount(180 kg/ha)e1
- Outcome
- superoxide(SOD),catalase(CAT) and peroxidase(POD) activitiese2
- Direction
- enhancede2
- Comparator
- other treatmentse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice senescence”
e1“compare with other treatments,W2 and suitable N application amount(180 kg/ha) delayed the increase of reactive oxygen species and MDA,had high Pn and promoted the accumulation of soluble protein content”
e2“enhanced the superoxide(SOD),catalase(CAT) and peroxidase(POD) activities”
Claim · model-written summary
W2 with a suitable N amount (180 kg/ha) promoted material accumulation relative to other treatments.
- Taxon
- riceOryza sativat0
- Treatment
- W2 and suitable N application amount(180 kg/ha)e1
- Outcome
- material accumulatione3
- Direction
- promotede3
- Comparator
- other treatmentse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice senescence”
e1“compare with other treatments,W2 and suitable N application amount(180 kg/ha) delayed the increase of reactive oxygen species and MDA,had high Pn and promoted the accumulation of soluble protein content”
e3“promoted material accumulation and promote yield”
Claim · model-written summary
W2 with a suitable N amount (180 kg/ha) promoted yield relative to other treatments.
- Taxon
- riceOryza sativat0
- Treatment
- W2 and suitable N application amount(180 kg/ha)e1
- Outcome
- yielde3
- Direction
- promotee3
- Comparator
- other treatmentse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice senescence”
e1“compare with other treatments,W2 and suitable N application amount(180 kg/ha) delayed the increase of reactive oxygen species and MDA,had high Pn and promoted the accumulation of soluble protein content”
e3“promoted material accumulation and promote yield”
Claim · model-written summary
Applying N at 270 kg/ha had a negative effect on the water-nitrogen interaction in rice.
- Taxon
- riceOryza sativat0
- Treatment
- Applying N(270 kg/ha)e4
- Outcome
- negative effect of waternitrogen interactione4
- Direction
- negativee4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice senescence”
e4“Applying N(270 kg/ha) resulted in a negative effect of waternitrogen interaction”
Claim · model-written summary
In dry cultivation of rice, applying N at 90 to 180 kg/ha alleviated the negative effect of water-nitrogen interaction.
- Taxon
- riceOryza sativat0
- Treatment
- applying N ranged from 90 to 180 kg/hae5
- Outcome
- negative effect of water-nitrogen interactione5
- Direction
- alleviatee5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice senescence”
e5“As for the treatment of dry cultivation of rice,applying N ranged from 90 to 180 kg/ha could alleviate the negative effect of water-nitrogen interaction”
Claim · model-written summary
Significant positive correlations were observed between O2-, H2O2 and MDA.
- Taxon
- riceOryza sativat0
- Compound
- O-·2,H2O2 and MDAe6
- Outcome
- correlationse6
- Direction
- positivee6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice senescence”
e6“significant positive correlations was observed between O-·2,H2O2 and MDA”
Claim · model-written summary
Significant negative correlations were observed between O2-, H2O2 and MDA and antioxidant enzyme activities, Pn and soluble protein content.
- Taxon
- riceOryza sativat0
- Compound
- O-·2,H2O2 and MDAe6
- Outcome
- negative correlatione7
- Direction
- negativee7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice senescence”
e6“significant positive correlations was observed between O-·2,H2O2 and MDA”
e7“and a significant negative correlation between them with antioxidant enzyme activities,Pn and soluble protein content”
Claim · model-written summary
Root vigor had a significant positive correlation with antioxidant enzyme activities, Pn and soluble protein content.
- Taxon
- riceOryza sativat0
- Organ / stage
- roote1
- Outcome
- root vigore1
- Direction
- positivee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice senescence”
e1“root vigor had high significant positive correlation with antioxidant enzyme activities,Pn and soluble protein”
Claim · model-written summary
Root vigor had a significant negative correlation with O2-, H2O2 and MDA.
- Taxon
- riceOryza sativat0
- Organ / stage
- roote1
- Outcome
- root vigore1
- Direction
- negativee2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice senescence”
e1“root vigor had high significant positive correlation with antioxidant enzyme activities,Pn and soluble protein”
e2“but it had high significant negative correlation with O-· 2 ,H2O2 and MDA”
Claim · model-written summary
Underground parts were closely related to aboveground parts during leaf senescence.
- Taxon
- riceOryza sativat0
- Organ / stage
- undergrounde3
- Outcome
- abovegrounde3
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice senescence”
e3“in the process of leave senescence,underground was closely related to aboveground”
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