Abstract
Abstract Upper three leaf blades on the mainshoot of wheat cultivar, cv. Pusa Lerma, grown under three soil nitrogen levels (0, 30 and 120 kg ha ‐1 ), were examined for changes in total reduced nitrogen and protease activity at pH 4.0 and 7.0. No net loss of reduced nitrogen takes place prior to and around anthesis. The protease activity is low during this period. At later stages there is rise in the loss of nitrogen which is paralleled by enhancement in protease activity. From amongst the leaf blades, nitrogen concentration is significantly high in the flag and penultimate as compared to the values in the third leaf blade. There were significant differences in protease activity (pH 4.0) amongst the leaf blades. At pH 7.0, however, the differences between the flag and penultimate leaf blades were not significant. Highest enzyme activity was in the flag followed by penultimate and then third leaf blade. Soil N application significantly enhanced the nitrogen content of all the leaf blades. At pH 4.0, the protease activity (g fr. wt. ‐1 ) increased significantly due to soil N application (N 30 over N 0 ). There was, however, decline in the enzyme activity at pH 7.0, though the differences at different soil N levels were not significant. Analysis in terms of μ mol N (reduced form) accumulated in the grains (ear) ‐1 revealed that two‐thirds of N is translocated by 28‐day stage and the rest between 28‐day and final harvest. The three leaf blades together contributed 22.7, 32.6 and 48.5% of the grain N (ear) ‐1 at N 0 , N 30 and N 120 ‐ respectively. Most of the nitrogen applied to the soil is reduced by these leaf blades.
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Claims 17
Claim · model-written summary
Reduced nitrogen had no net loss before and around anthesis.
- Taxon
- Wheat
Triticum aestivumt0 - Organ / stage
- anthesise0
- Outcome
- reduced nitrogene0
- Direction
- No net losse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“No net loss of reduced nitrogen takes place prior to and around anthesis.”
t0“Nitrogen Metabolism of the Upper Three Leaf Blades of Wheat at Different Soil Nitrogen Levels”
Claim · model-written summary
Protease activity was low around anthesis.
- Taxon
- WheatTriticum aestivumt0
- Outcome
- protease activitye0
- Direction
- lowe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The protease activity is low during this period.”
t0“Nitrogen Metabolism of the Upper Three Leaf Blades of Wheat at Different Soil Nitrogen Levels”
Claim · model-written summary
Nitrogen loss rose at later stages.
- Taxon
- WheatTriticum aestivumt0
- Outcome
- loss of nitrogene0
- Direction
- risee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At later stages there is rise in the loss of nitrogen”
t0“Nitrogen Metabolism of the Upper Three Leaf Blades of Wheat at Different Soil Nitrogen Levels”
Claim · model-written summary
Protease activity rose at later stages alongside nitrogen loss.
- Taxon
- WheatTriticum aestivumt0
- Organ / stage
- later stagese0
- Outcome
- protease activitye0
- Direction
- enhancemente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At later stages there is rise in the loss of nitrogen which is paralleled by enhancement in protease activity.”
t0“Nitrogen Metabolism of the Upper Three Leaf Blades of Wheat at Different Soil Nitrogen Levels”
Claim · model-written summary
Flag and penultimate leaf nitrogen concentrations exceeded third-leaf values significantly.
- Taxon
- WheatTriticum aestivumt0
- Organ / stage
- flag and penultimatee0
- Outcome
- nitrogen concentratione0
- Direction
- highe0
- Comparator
- third leaf bladee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“nitrogen concentration is significantly high in the flag and penultimate as compared to the values in the third leaf blade.”
t0“Nitrogen Metabolism of the Upper Three Leaf Blades of Wheat at Different Soil Nitrogen Levels”
Claim · model-written summary
Protease activity at pH 4 differed significantly among leaf blades.
- Taxon
- WheatTriticum aestivumt0
- Organ / stage
- leaf bladese0
- Outcome
- protease activity (pH 4.0)e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There were significant differences in protease activity (pH 4.0) amongst the leaf blades.”
t0“Nitrogen Metabolism of the Upper Three Leaf Blades of Wheat at Different Soil Nitrogen Levels”
Claim · model-written summary
At pH 7, flag and penultimate blade protease activities did not differ significantly.
- Taxon
- WheatTriticum aestivumt0
- Organ / stage
- flag and penultimate leaf bladese0
- Outcome
- differencese0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At pH 7.0, however, the differences between the flag and penultimate leaf blades were not significant.”
t0“Nitrogen Metabolism of the Upper Three Leaf Blades of Wheat at Different Soil Nitrogen Levels”
Claim · model-written summary
Protease activity ranked flag above penultimate above third blade.
- Taxon
- WheatTriticum aestivumt0
- Organ / stage
- flage0
- Outcome
- enzyme activitye0
- Direction
- Higheste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Highest enzyme activity was in the flag followed by penultimate and then third leaf blade.”
t0“Nitrogen Metabolism of the Upper Three Leaf Blades of Wheat at Different Soil Nitrogen Levels”
Claim · model-written summary
Soil nitrogen significantly increased leaf-blade nitrogen content.
- Taxon
- WheatTriticum aestivumt0
- Organ / stage
- leaf bladese0
- Treatment
- Soil N applicatione0
- Outcome
- nitrogen contente0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soil N application significantly enhanced the nitrogen content of all the leaf blades.”
t0“Nitrogen Metabolism of the Upper Three Leaf Blades of Wheat at Different Soil Nitrogen Levels”
Claim · model-written summary
N30 versus N0 significantly raised protease activity at pH 4.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- N 30e0
- Outcome
- protease activitye0
- Direction
- increasede0
- Comparator
- N 0e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At pH 4.0, the protease activity (g fr. wt. ‐1 ) increased significantly due to soil N application (N 30 over N 0 ).”
t0“Nitrogen Metabolism of the Upper Three Leaf Blades of Wheat at Different Soil Nitrogen Levels”
Claim · model-written summary
At pH 7 soil nitrogen lowered enzyme activity nonsignificantly.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- soil N levelse0
- Outcome
- enzyme activitye0
- Direction
- declinee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was, however, decline in the enzyme activity at pH 7.0, though the differences at different soil N levels were not significant.”
t0“Nitrogen Metabolism of the Upper Three Leaf Blades of Wheat at Different Soil Nitrogen Levels”
Claim · model-written summary
Two thirds of grain nitrogen was translocated by day 28.
- Taxon
- WheatTriticum aestivumt0
- Organ / stage
- 28‐day stagee0
- Outcome
- N is translocatede0
- Value
- two‐thirdse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“two‐thirds of N is translocated by 28‐day stage”
t0“Nitrogen Metabolism of the Upper Three Leaf Blades of Wheat at Different Soil Nitrogen Levels”
Claim · model-written summary
The remainder of grain nitrogen was translocated between day 28 and harvest.
- Taxon
- WheatTriticum aestivumt0
- Outcome
- the rest between 28‐day and final harveste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the rest between 28‐day and final harvest.”
t0“Nitrogen Metabolism of the Upper Three Leaf Blades of Wheat at Different Soil Nitrogen Levels”
Claim · model-written summary
Three leaf blades contributed 22.7% of grain nitrogen at N0.
- Taxon
- WheatTriticum aestivumt0
- Organ / stage
- three leaf bladese0
- Treatment
- N 0e0
- Outcome
- grain N (ear) ‐1e0
- Value
- 22.7e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The three leaf blades together contributed 22.7, 32.6 and 48.5% of the grain N (ear) ‐1 at N 0 , N 30 and N 120 ‐ respectively.”
t0“Nitrogen Metabolism of the Upper Three Leaf Blades of Wheat at Different Soil Nitrogen Levels”
Claim · model-written summary
Three leaf blades contributed 32.6% of grain nitrogen at N30.
- Taxon
- WheatTriticum aestivumt0
- Organ / stage
- three leaf bladese0
- Treatment
- N 30e0
- Outcome
- grain N (ear) ‐1e0
- Value
- 32.6e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The three leaf blades together contributed 22.7, 32.6 and 48.5% of the grain N (ear) ‐1 at N 0 , N 30 and N 120 ‐ respectively.”
t0“Nitrogen Metabolism of the Upper Three Leaf Blades of Wheat at Different Soil Nitrogen Levels”
Claim · model-written summary
Three leaf blades contributed 48.5% of grain nitrogen at N120.
- Taxon
- WheatTriticum aestivumt0
- Organ / stage
- three leaf bladese0
- Treatment
- N 120e0
- Outcome
- grain N (ear) ‐1e0
- Value
- 48.5%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The three leaf blades together contributed 22.7, 32.6 and 48.5% of the grain N (ear) ‐1 at N 0 , N 30 and N 120 ‐ respectively.”
t0“Nitrogen Metabolism of the Upper Three Leaf Blades of Wheat at Different Soil Nitrogen Levels”
Claim · model-written summary
Most applied soil nitrogen was reduced by the three leaf blades.
- Taxon
- WheatTriticum aestivumt0
- Outcome
- nitrogen applied to the soil is reduced by these leaf bladese0
- Direction
- reducede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Most of the nitrogen applied to the soil is reduced by these leaf blades.”
t0“Nitrogen Metabolism of the Upper Three Leaf Blades of Wheat at Different Soil Nitrogen Levels”
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See all 479 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.