Abstract
Cotton ( Gossypium hirsutum L.) yield is severely limited by waterlogging in some global production areas. The objective was to study physiological and biochemical mechanisms of cotton root recovery after waterlogging during different reproductive stages. Cotton plants (cultivar Simian 3) were subjected to waterlogging for 10 d and then permitted to recover for 20 d. Waterlogging significantly reduced root dry matter, root vigor, and net photosynthetic rate ( P n ). After the termination of waterlogging, root growth showed a significant recovery. Root dry matter of waterlogged plants increased quickly, but remained 20 to 30% lower than controls. Total N content in waterlogged cotton roots was the same as controls at 20 d after waterlogging during the squaring stage, but was significantly lower during the flowering and boll‐forming stage. The activities of superoxide dismutase, catalase, and peroxidase in waterlogged plants increased for 10 d after waterlogging, then declined slowly. The malondialdehyde content in waterlogged roots continued to increase for 5 d after waterlogging, then declined to a significantly lower level than the control. Root vigor recovered rapidly after waterlogging, and was much higher than the control during the squaring stage, but significantly lower during flowering and boll‐forming stage. P n of waterlogged cotton was suppressed after a 10‐d recovery period, and remained lower than well‐watered controls. These results suggest (i) roots of waterlogged cotton recovered more quickly than shoots, (ii) cotton roots recover better from oxidant damage due to waterlogging during the squaring stage than during the flowering and boll‐forming stage.
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Claims 12
Claim · model-written summary
Waterlogging significantly reduced root dry matter, root vigor and net photosynthetic rate.
- Taxon
- Cotton
Gossypium hirsutumt0 - Treatment
- Waterlogginge0
- Outcome
- root dry matter, root vigor, and net photosynthetic rate ( P n )e0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Waterlogging significantly reduced root dry matter, root vigor, and net photosynthetic rate ( P n ).”
t0“Cotton”
Claim · model-written summary
Root growth recovered significantly after waterlogging ended.
- Taxon
- CottonGossypium hirsutumt0
- Treatment
- waterlogginge0
- Outcome
- root growthe0
- Direction
- recoverye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“After the termination of waterlogging, root growth showed a significant recovery.”
t0“Cotton”
Claim · model-written summary
Root dry matter increased quickly but remained 20 to 30% lower than controls.
- Taxon
- CottonGossypium hirsutumt0
- Treatment
- waterloggede0
- Outcome
- Root dry mattere0
- Direction
- lowere0
- Value
- 20 to 30%e0
- Comparator
- controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Root dry matter of waterlogged plants increased quickly, but remained 20 to 30% lower than controls.”
t0“Cotton”
Claim · model-written summary
Root total N content matched controls after 20 days when waterlogging occurred at squaring.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- waterlogginge0
- Outcome
- Total N contente0
- Direction
- the samee0
- Qualifier
- during the squaring stagee0
- Comparator
- controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Total N content in waterlogged cotton roots was the same as controls at 20 d after waterlogging during the squaring stage”
Claim · model-written summary
Root total N content was significantly lower during flowering and boll forming.
- Taxon
- CottonGossypium hirsutumt0
- Treatment
- waterlogginge0
- Outcome
- Total N contente0
- Direction
- lowere0
- Qualifier
- flowering and boll‐forming stagee0
- Comparator
- controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Total N content in waterlogged cotton roots was the same as controls at 20 d after waterlogging during the squaring stage, but was significantly lower during the flowering and boll‐forming stage.”
t0“Cotton”
Claim · model-written summary
Superoxide dismutase, catalase and peroxidase activities increased for 10 days after waterlogging then declined.
- Taxon
- CottonGossypium hirsutumt0
- Outcome
- activities of superoxide dismutase, catalase, and peroxidasee0
- Direction
- increasede0
- Qualifier
- then declined slowlye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The activities of superoxide dismutase, catalase, and peroxidase in waterlogged plants increased for 10 d after waterlogging, then declined slowly.”
t0“Cotton”
Claim · model-written summary
Malondialdehyde content increased for five days after waterlogging then fell below control.
- Taxon
- CottonGossypium hirsutumt0
- Outcome
- malondialdehyde contente0
- Direction
- increasee0
- Qualifier
- then declined to a significantly lower level than the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The malondialdehyde content in waterlogged roots continued to increase for 5 d after waterlogging, then declined to a significantly lower level than the control.”
t0“Cotton”
Claim · model-written summary
Root vigor recovered rapidly and exceeded control at squaring.
- Taxon
- CottonGossypium hirsutumt0
- Treatment
- waterlogginge0
- Outcome
- Root vigore0
- Direction
- highere0
- Qualifier
- during the squaring stagee0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Root vigor recovered rapidly after waterlogging, and was much higher than the control during the squaring stage”
t0“Cotton”
Claim · model-written summary
Root vigor was significantly lower than control during flowering and boll forming.
- Taxon
- CottonGossypium hirsutumt0
- Treatment
- waterlogginge0
- Outcome
- Root vigore0
- Direction
- lowere0
- Qualifier
- flowering and boll‐forming stagee0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Root vigor recovered rapidly after waterlogging, and was much higher than the control during the squaring stage, but significantly lower during flowering and boll‐forming stage.”
t0“Cotton”
Claim · model-written summary
Net photosynthetic rate remained lower than well watered controls after recovery.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- waterloggede0
- Outcome
- P ne0
- Direction
- lowere0
- Comparator
- well‐watered controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“P n of waterlogged cotton was suppressed after a 10‐d recovery period, and remained lower than well‐watered controls.”
Claim · model-written summary
Authors infer cotton roots recover more quickly than shoots.
- Taxon
- cottonGossypium hirsutume0
- Outcome
- roots of waterlogged cotton recoverede0
- Direction
- more quicklye0
- Comparator
- shootse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“roots of waterlogged cotton recovered more quickly than shoots”
Claim · model-written summary
Authors infer roots recover better from oxidant damage at squaring than later reproductive stages.
- Taxon
- cottonGossypium hirsutume0
- Outcome
- recover better from oxidant damagee0
- Direction
- bettere0
- Qualifier
- during the squaring stagee0
- Comparator
- flowering and boll‐forming stagee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cotton roots recover better from oxidant damage due to waterlogging during the squaring stage than during the flowering and boll‐forming stage”
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See all 6 papers →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.