Abstract
Nitrate, nitrate reductase activity, soluble protein of total leaf tissue, fresh and dry weight, and reduced nitrogen of total shoot tissue of ‘Arthur’ wheat ( Triticum aestivum L.) were measured at intervals throughout the spring growing season in response to three rates of nitrogen [as CA(NO 3 ) 2 ] applied on each of five dates. Yield of straw and grain and their respective concentration of reduced nitrogen at maturity were also obtained. A positive relationship observed between nitrate content and nitrate reductase activity of the leaf tissue substantiated the dependency of the enzyme activity upon availability of substrate. The increase in nitrate reductase activity in response to added nitrogen was paralleled by an increase in vegetative reduced nitrogen, indicating a casual relationship between enzyme activity and accumulation of reduced nitrogen in the plant. Since translocation of vegetative nitrogen to the grain was uniform across treatments, a significant positive correlation was found between nitrate reductase activity (expressed as moles N ha ‐1 per season) and grain nitrogen (kg N ha ‐1 ) at maturity. Seasonal nitrate reductase also correlated significantly and positively with grain yields (kg ha ‐l ). Similar results were obtained in the preceding season with ‘Ottawa’ and ‘Gage’ wheats, except that the application of nitrogen to Gage caused excessive lodging and thus eliminated the signifiraut correlations between enzyme activity and grain yield and grain nitrogen. Maintenance of nitrate reductase activity during the reproductive phase in varieties resistant to lodging can increase the yield of grain protein aud prevent the depression of percent grain protein frequently observed when grain yields are high.
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Claims 9
Claim · model-written summary
Leaf nitrate content was positively related to nitrate reductase activity.
- Taxon
- wheat
Triticum aestivumt0 - Organ / stage
- leaf tissuee0
- Outcome
- nitrate reductase activitye0
- Direction
- positivee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A positive relationship observed between nitrate content and nitrate reductase activity of the leaf tissue”
t0“Wheat”
Claim · model-written summary
Added nitrogen increased nitrate reductase activity.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- added nitrogene0
- Outcome
- nitrate reductase activitye0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The increase in nitrate reductase activity in response to added nitrogen was paralleled by an increase in vegetative reduced nitrogen”
t0“Wheat”
Claim · model-written summary
Added nitrogen increased vegetative reduced nitrogen.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- added nitrogene0
- Outcome
- vegetative reduced nitrogene0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The increase in nitrate reductase activity in response to added nitrogen was paralleled by an increase in vegetative reduced nitrogen”
t0“Wheat”
Claim · model-written summary
Vegetative nitrogen translocation to grain was uniform across treatments.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- translocation of vegetative nitrogen to the graine0
- Direction
- uniforme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“translocation of vegetative nitrogen to the grain was uniform across treatments”
t0“Wheat”
Claim · model-written summary
Nitrate reductase activity correlated positively with grain nitrogen.
- Taxon
- wheatTriticum aestivumt0
- Organ / stage
- graine0
- Outcome
- grain nitrogene0
- Direction
- positivee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a significant positive correlation was found between nitrate reductase activity (expressed as moles N ha ‐1 per season) and grain nitrogen (kg N ha ‐1 ) at maturity”
t0“Wheat”
Claim · model-written summary
Seasonal nitrate reductase correlated positively with grain yield.
- Taxon
- wheatTriticum aestivumt0
- Organ / stage
- graine0
- Outcome
- grain yieldse0
- Direction
- positivelye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seasonal nitrate reductase also correlated significantly and positively with grain yields (kg ha ‐l )”
t0“Wheat”
Claim · model-written summary
Nitrogen application caused excessive lodging in Gage.
- Taxon
- wheatTriticum aestivumt0
- Material
- Gagee0
- Treatment
- application of nitrogene0
- Outcome
- excessive lodginge0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the application of nitrogen to Gage caused excessive lodging”
t0“Wheat”
Claim · model-written summary
In Gage, lodging eliminated significant enzyme activity correlations with grain yield and grain nitrogen.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- correlations between enzyme activity and grain yield and grain nitrogene0
- Direction
- eliminatede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“thus eliminated the signifiraut correlations between enzyme activity and grain yield and grain nitrogen”
t0“Wheat”
Claim · model-written summary
Authors suggest maintaining nitrate reductase during reproduction in lodging-resistant varieties to increase grain protein yield.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- increase the yield of grain protein aud prevent the depression of percent grain proteine0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Maintenance of nitrate reductase activity during the reproductive phase in varieties resistant to lodging can increase the yield of grain protein aud prevent the depression of percent grain protein”
t0“Wheat”
The same questions in other papers
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See all 551 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.