Abstract
Pot experiments were conducted to study the effects of nitrogen on the cotton fiber strength formation under water stress and after re-watering during the flowering and boll-forming stage in Nanjing Agricultural University in 2005 and 2006.Within each water treatment,three nitrogen levels were imposed:N 0,240 and 480 kg/ha.The results showed that water stress significantly reduced soluble protein content in cotton fiber,increased the antioxidant enzyme activities of SOD,CAT and POD and MDA content at the end of soil water stress,but reduced the fiber thickening key enzyme activities of sucrose synthetase,β-1,3-glucanase,sucrose phosphate synthetase,and IAA oxidase.On the 10th day after rewatering, there was no significant difference of SOD,CAT and POD activity between water-stressed and well-watered cotton. However,MDA content declined,and the fiber thickening related key enzyme activities were still lower than wellwatered treatments.The fiber strength was also reduced.The result of 2-year experiment showed that N 240 kg/ha was the optimal nitrogen application rate for forming high-strength fibre under soil water stress and afterward re-watering because the antioxidant enzyme activities and the fiber thickening key enzyme activities were highest,and MDA content were the lowest,thus leading to the greatest fibre strength.In this experiments,deficient(N 0 kg/ha) and excessive(N 480 kg/ha) nitrogen supply are of disadvantaged to the fiber thickening key enzyme activities and cotton fibre strength.
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Claims 14
Claim · model-written summary
Water stress reduced cotton fiber soluble protein content.
- Taxon
- cotton
Gossypium hirsutume0 - Treatment
- water stresse0
- Outcome
- soluble protein contente0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“water stress significantly reduced soluble protein content in cotton fiber,increased the antioxidant enzyme activities of SOD,CAT and POD and MDA content at the end of soil water stress,but reduced the fiber thickening key enzyme activities of sucrose synthetase,β-1,3-glucanase,sucrose phosphate synthetase,and IAA oxidase.”
Claim · model-written summary
Water stress increased cotton fiber antioxidant enzyme activities of SOD,CAT and POD.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- water stresse0
- Outcome
- antioxidant enzyme activities of SOD,CAT and PODe0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“water stress significantly reduced soluble protein content in cotton fiber,increased the antioxidant enzyme activities of SOD,CAT and POD and MDA content at the end of soil water stress,but reduced the fiber thickening key enzyme activities of sucrose synthetase,β-1,3-glucanase,sucrose phosphate synthetase,and IAA oxidase.”
Claim · model-written summary
Water stress increased cotton fiber MDA content.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- water stresse0
- Outcome
- MDA contente0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“water stress significantly reduced soluble protein content in cotton fiber,increased the antioxidant enzyme activities of SOD,CAT and POD and MDA content at the end of soil water stress,but reduced the fiber thickening key enzyme activities of sucrose synthetase,β-1,3-glucanase,sucrose phosphate synthetase,and IAA oxidase.”
Claim · model-written summary
Water stress reduced cotton fiber fiber thickening key enzyme activities of sucrose synthetase,β-1,3-glucanase,sucrose phosphate synthetase,and IAA oxidase.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- water stresse0
- Outcome
- fiber thickening key enzyme activities of sucrose synthetase,β-1,3-glucanase,sucrose phosphate synthetase,and IAA oxidasee0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“water stress significantly reduced soluble protein content in cotton fiber,increased the antioxidant enzyme activities of SOD,CAT and POD and MDA content at the end of soil water stress,but reduced the fiber thickening key enzyme activities of sucrose synthetase,β-1,3-glucanase,sucrose phosphate synthetase,and IAA oxidase.”
Claim · model-written summary
At 10 days after rewatering SOD, CAT and POD activities did not differ significantly from well-watered cotton.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- water-stressede0
- Outcome
- SOD,CAT and POD activitye0
- Direction
- no significant differencee0
- Comparator
- well-waterede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there was no significant difference of SOD,CAT and POD activity between water-stressed and well-watered cotton.”
Claim · model-written summary
After rewatering, cotton MDA content was declined.
- Taxon
- cottonGossypium hirsutumt0
- Outcome
- MDA contente0
- Direction
- declinede0
- Comparator
- wellwatered treatmentse0
Not reportedTreatment
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“MDA content declined,and the fiber thickening related key enzyme activities were still lower than wellwatered treatments.The fiber strength was also reduced.”
t0“cotton”
Claim · model-written summary
After rewatering, cotton fiber thickening related key enzyme activities was lower.
- Taxon
- cottonGossypium hirsutumt0
- Outcome
- fiber thickening related key enzyme activitiese0
- Direction
- lowere0
- Comparator
- wellwatered treatmentse0
Not reportedTreatment
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“MDA content declined,and the fiber thickening related key enzyme activities were still lower than wellwatered treatments.The fiber strength was also reduced.”
t0“cotton”
Claim · model-written summary
After rewatering, cotton fiber strength was reduced.
- Taxon
- cottonGossypium hirsutumt0
- Outcome
- fiber strengthe0
- Direction
- reducede0
- Comparator
- wellwatered treatmentse0
Not reportedTreatment
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“MDA content declined,and the fiber thickening related key enzyme activities were still lower than wellwatered treatments.The fiber strength was also reduced.”
t0“cotton”
Claim · model-written summary
N 240 kg/ha gave highest antioxidant enzyme activities under water stress and rewatering.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- N 240 kg/hae0
- Outcome
- antioxidant enzyme activitiese0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N 240 kg/ha was the optimal nitrogen application rate for forming high-strength fibre under soil water stress and afterward re-watering because the antioxidant enzyme activities and the fiber thickening key enzyme activities were highest,and MDA content were the lowest,thus leading to the greatest fibre strength.”
t0“cotton”
Claim · model-written summary
N 240 kg/ha gave highest fiber thickening key enzyme activities under water stress and rewatering.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- N 240 kg/hae0
- Outcome
- fiber thickening key enzyme activitiese0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N 240 kg/ha was the optimal nitrogen application rate for forming high-strength fibre under soil water stress and afterward re-watering because the antioxidant enzyme activities and the fiber thickening key enzyme activities were highest,and MDA content were the lowest,thus leading to the greatest fibre strength.”
t0“cotton”
Claim · model-written summary
N 240 kg/ha gave lowest MDA content under water stress and rewatering.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- N 240 kg/hae0
- Outcome
- MDA contente0
- Direction
- loweste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N 240 kg/ha was the optimal nitrogen application rate for forming high-strength fibre under soil water stress and afterward re-watering because the antioxidant enzyme activities and the fiber thickening key enzyme activities were highest,and MDA content were the lowest,thus leading to the greatest fibre strength.”
t0“cotton”
Claim · model-written summary
N 240 kg/ha gave greatest fibre strength under water stress and rewatering.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- N 240 kg/hae0
- Outcome
- fibre strengthe0
- Direction
- greateste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N 240 kg/ha was the optimal nitrogen application rate for forming high-strength fibre under soil water stress and afterward re-watering because the antioxidant enzyme activities and the fiber thickening key enzyme activities were highest,and MDA content were the lowest,thus leading to the greatest fibre strength.”
t0“cotton”
Claim · model-written summary
N 0 kg/ha nitrogen was disadvantageous for cotton fiber thickening enzymes and strength.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- N 0 kg/hae0
- Outcome
- cotton fibre strengthe0
- Direction
- disadvantagede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“deficient(N 0 kg/ha) and excessive(N 480 kg/ha) nitrogen supply are of disadvantaged to the fiber thickening key enzyme activities and cotton fibre strength.”
Claim · model-written summary
N 480 kg/ha nitrogen was disadvantageous for cotton fiber thickening enzymes and strength.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- N 480 kg/hae0
- Outcome
- cotton fibre strengthe0
- Direction
- disadvantagede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“deficient(N 0 kg/ha) and excessive(N 480 kg/ha) nitrogen supply are of disadvantaged to the fiber thickening key enzyme activities and cotton fibre strength.”
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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.