Abstract
Pot experiment was conducted to study effects of shading and waterlogging on antioxidants(content of GSH,activity of SOD,POD and CAT) and malondialdehyde(MDA) content of flue-cured tobacco at different growth stages.Results showed that:(1) Plant height increased after shading and waterlogging at early stage of root elongation and vigorous growth stage.Stem girth and maximum leaf area decreased and increased respectively after shading and waterlogging at every growth stage.Maximum leaf length/width ratio significantly increased in root elongation.(2) Content of GSH under three shading and waterlogging treatments were all lower than control groups.Peroxidase(POD) under shading and waterlogging at three growth stages kept higher activity than control group.Catalase(CAT) activity under shading and waterlogging at root elongation stage obviously increased.Superoxide dismutase(SOD) activity showed great change among all treatments.(3) After shading and waterlogging at three growth stages,MDA content were either highly significant or significant than control group,and MDA content of three shading and waterlogging treatments were all lower than control group at the end of growth stage.(4) Correlation analysis showed that MDA content of control group had a highly significant negative correlation with POD activity.MDA content under shading and waterlogging at root elongation stage had a highly significant negative correlation with CAT activity.After shading and waterlogging at vigorous growth stage,MDA content had significant or highly significant negative correlations with activity of POD,CAT and SOD.After shading and waterlogging at ripe stages,MDA content had highly significantly negative correlations with GSH content and activity of POD and CAT.
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Claims 14
Claim · model-written summary
Plant height increased after shading and waterlogging at root elongation and vigorous growth.
- Taxon
- flue-cured tobaccot0
- Organ / stage
- early stage of root elongation and vigorous growth stagee0
- Treatment
- shading and waterlogginge0
- Outcome
- Plant heighte0
- Direction
- increasede0
Not reportedComparator
Verbatim
e0“Plant height increased after shading and waterlogging at early stage of root elongation and vigorous growth stage.”
t0“flue-cured tobacco”
Claim · model-written summary
Stem girth decreased after shading at every growth stage.
- Taxon
- flue-cured tobaccot0
- Treatment
- shadinge0
- Outcome
- Stem girthe0
- Direction
- decreasede0
- Qualifier
- at every growth stagee0
Not reportedComparator
Verbatim
e0“Stem girth and maximum leaf area decreased and increased respectively after shading and waterlogging at every growth stage.”
t0“flue-cured tobacco”
Claim · model-written summary
Maximum leaf area increased after waterlogging at every growth stage.
- Taxon
- flue-cured tobaccot0
- Treatment
- waterlogginge0
- Outcome
- maximum leaf areae0
- Direction
- increasede0
- Qualifier
- at every growth stagee0
Not reportedComparator
Verbatim
e0“Stem girth and maximum leaf area decreased and increased respectively after shading and waterlogging at every growth stage.”
t0“flue-cured tobacco”
Claim · model-written summary
Maximum leaf length-to-width ratio significantly increased in root elongation.
Verbatim
e0“Maximum leaf length/width ratio significantly increased in root elongation.”
t0“flue-cured tobacco”
Claim · model-written summary
GSH content was lower under all three shading and waterlogging treatments than controls.
Verbatim
e0“Content of GSH under three shading and waterlogging treatments were all lower than control groups.”
t0“flue-cured tobacco”
Claim · model-written summary
POD activity was higher after shading and waterlogging at all three stages than controls.
Verbatim
e0“Peroxidase(POD) under shading and waterlogging at three growth stages kept higher activity than control group.”
t0“flue-cured tobacco”
Claim · model-written summary
CAT activity increased under shading and waterlogging at root elongation.
- Taxon
- flue-cured tobaccot0
- Organ / stage
- root elongation stagee0
- Treatment
- shading and waterlogginge0
- Outcome
- Catalase(CAT) activitye0
- Direction
- increasede0
Not reportedComparator
Verbatim
e0“Catalase(CAT) activity under shading and waterlogging at root elongation stage obviously increased.”
t0“flue-cured tobacco”
Claim · model-written summary
SOD activity varied greatly among treatments.
Not reportedDirection
Verbatim
e0“Superoxide dismutase(SOD) activity showed great change among all treatments.”
t0“flue-cured tobacco”
Claim · model-written summary
MDA content differed significantly after shading and waterlogging at three stages.
- Taxon
- flue-cured tobaccot0
- Treatment
- shading and waterlogginge0
- Outcome
- MDA contente0
- Qualifier
- at three growth stagese0
- Comparator
- control groupe0
Not reportedDirection
Verbatim
e0“After shading and waterlogging at three growth stages,MDA content were either highly significant or significant than control group”
t0“flue-cured tobacco”
Claim · model-written summary
MDA content under all three treatments was lower than controls at the end of growth.
Verbatim
e0“MDA content of three shading and waterlogging treatments were all lower than control group at the end of growth stage.”
t0“flue-cured tobacco”
Claim · model-written summary
Control MDA content was negatively correlated with POD activity.
Verbatim
e0“MDA content of control group had a highly significant negative correlation with POD activity.”
t0“flue-cured tobacco”
Claim · model-written summary
At root elongation under treatment, MDA content was negatively correlated with CAT activity.
Verbatim
e0“MDA content under shading and waterlogging at root elongation stage had a highly significant negative correlation with CAT activity.”
t0“flue-cured tobacco”
Claim · model-written summary
At vigorous growth under treatment, MDA content was negatively correlated with POD, CAT and SOD activity.
Verbatim
e0“After shading and waterlogging at vigorous growth stage,MDA content had significant or highly significant negative correlations with activity of POD,CAT and SOD.”
t0“flue-cured tobacco”
Claim · model-written summary
At ripeness under treatment, MDA content was negatively correlated with GSH content, POD and CAT activity.
Verbatim
e0“After shading and waterlogging at ripe stages,MDA content had highly significantly negative correlations with GSH content and activity of POD and CAT.”
t0“flue-cured tobacco”
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