Abstract
Soil water stress is the major ecological factor limiting grain quality formation of wheat,while elucidating the physiological mechanism and regulation principles of this formation is of important significance for understanding grain quality physiology and guiding wheat cultural management.In this paper,a cement pool culture experiment was conducted to study the effects of nitrogen supply rate on nitrogen metabolism and grain protein accumulation of two wheat varieties differed in grain protein content under drought and waterlogging.Three water treatments were established from anthesis to maturity,i.e.,waterlogging,drought,and moderate water supply(CK).In each treatment,two nitrogen levels of 120 and 240 kg·hm~(-2) were implemented.Compared with CK,both drought and waterlogging significantly reduced the nitrate reductase(NR) activity in flag leaf,and the contents of total nitrogen and free amino acid in leaf,stem and sheath.Drought increased,while waterlogging reduced the contents of total nitrogen and free amino acid in stem and sheath,and that of protein in grain.Under drought and waterlogging,nitrogen supply increased the NR activity in flag leaf,the total nitrogen and free amino acid contents in leaf,stem and sheath,and the free amino acid and protein contents in grain.Both drought and waterlogging stress reduced grain yield and protein yield.Nitrogen supply increased grain yield under CK and drought,but reduced it under waterlogging,illustrating that nitrogen supply could obviously regulate the nitrogen metabolism and grain protein accumulation of wheat from anthesis to maturity under drought or waterlogging.
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Claims 17
Claim · model-written summary
Drought reduced flag leaf nitrate reductase activity relative to moderate water supply.
- Taxon
- wheat
Triticum aestivume0t0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared with CK,both drought and waterlogging significantly reduced the nitrate reductase(NR) activity in flag leaf”
t0“Effects of nitrogen supply on nitrogen metabolism and grain protein accumulation of wheat under different water treatments.”
Claim · model-written summary
Waterlogging reduced flag leaf nitrate reductase activity relative to moderate water supply.
- Taxon
- wheatTriticum aestivume0t0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared with CK,both drought and waterlogging significantly reduced the nitrate reductase(NR) activity in flag leaf”
t0“Effects of nitrogen supply on nitrogen metabolism and grain protein accumulation of wheat under different water treatments.”
Claim · model-written summary
Drought reduced leaf, stem and sheath total nitrogen and free amino acid content relative to CK.
- Taxon
- wheatTriticum aestivume0t0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared with CK,both drought and waterlogging significantly reduced the nitrate reductase(NR) activity in flag leaf,and the contents of total nitrogen and free amino acid in leaf,stem and sheath”
t0“Effects of nitrogen supply on nitrogen metabolism and grain protein accumulation of wheat under different water treatments.”
Claim · model-written summary
Waterlogging reduced leaf, stem and sheath total nitrogen and free amino acid content relative to CK.
- Taxon
- wheatTriticum aestivume0t0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared with CK,both drought and waterlogging significantly reduced the nitrate reductase(NR) activity in flag leaf,and the contents of total nitrogen and free amino acid in leaf,stem and sheath”
t0“Effects of nitrogen supply on nitrogen metabolism and grain protein accumulation of wheat under different water treatments.”
Claim · model-written summary
Drought increased stem and sheath total nitrogen and free amino acid content.
- Taxon
- wheatTriticum aestivume0t0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Drought increased,while waterlogging reduced the contents of total nitrogen and free amino acid in stem and sheath,and that of protein in grain”
t0“Effects of nitrogen supply on nitrogen metabolism and grain protein accumulation of wheat under different water treatments.”
Claim · model-written summary
Waterlogging reduced stem and sheath total nitrogen and free amino acid content.
- Taxon
- wheatTriticum aestivume0t0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Drought increased,while waterlogging reduced the contents of total nitrogen and free amino acid in stem and sheath,and that of protein in grain”
t0“Effects of nitrogen supply on nitrogen metabolism and grain protein accumulation of wheat under different water treatments.”
Claim · model-written summary
Drought increased grain protein content.
- Taxon
- wheatTriticum aestivume0t0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Drought increased,while waterlogging reduced the contents of total nitrogen and free amino acid in stem and sheath,and that of protein in grain”
t0“Effects of nitrogen supply on nitrogen metabolism and grain protein accumulation of wheat under different water treatments.”
Claim · model-written summary
Waterlogging reduced grain protein content.
- Taxon
- wheatTriticum aestivume0t0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Drought increased,while waterlogging reduced the contents of total nitrogen and free amino acid in stem and sheath,and that of protein in grain”
t0“Effects of nitrogen supply on nitrogen metabolism and grain protein accumulation of wheat under different water treatments.”
Claim · model-written summary
Nitrogen supply increased flag leaf nitrate reductase activity during drought.
- Taxon
- wheatTriticum aestivume0t0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under drought and waterlogging,nitrogen supply increased the NR activity in flag leaf”
t0“Effects of nitrogen supply on nitrogen metabolism and grain protein accumulation of wheat under different water treatments.”
Claim · model-written summary
Nitrogen supply increased flag leaf nitrate reductase activity during waterlogging.
- Taxon
- wheatTriticum aestivume0t0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under drought and waterlogging,nitrogen supply increased the NR activity in flag leaf”
t0“Effects of nitrogen supply on nitrogen metabolism and grain protein accumulation of wheat under different water treatments.”
Claim · model-written summary
Nitrogen supply increased leaf, stem and sheath total nitrogen and free amino acid content under drought and waterlogging.
- Taxon
- wheatTriticum aestivume0t0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under drought and waterlogging,nitrogen supply increased the NR activity in flag leaf,the total nitrogen and free amino acid contents in leaf,stem and sheath”
t0“Effects of nitrogen supply on nitrogen metabolism and grain protein accumulation of wheat under different water treatments.”
Claim · model-written summary
Nitrogen supply increased grain free amino acid and protein content under drought and waterlogging.
- Taxon
- wheatTriticum aestivume0t0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under drought and waterlogging,nitrogen supply increased the NR activity in flag leaf,the total nitrogen and free amino acid contents in leaf,stem and sheath,and the free amino acid and protein contents in grain”
t0“Effects of nitrogen supply on nitrogen metabolism and grain protein accumulation of wheat under different water treatments.”
Claim · model-written summary
Drought reduced wheat grain and protein yields.
- Taxon
- wheatTriticum aestivume0t0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both drought and waterlogging stress reduced grain yield and protein yield”
t0“Effects of nitrogen supply on nitrogen metabolism and grain protein accumulation of wheat under different water treatments.”
Claim · model-written summary
Waterlogging reduced wheat grain and protein yields.
- Taxon
- wheatTriticum aestivume0t0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both drought and waterlogging stress reduced grain yield and protein yield”
t0“Effects of nitrogen supply on nitrogen metabolism and grain protein accumulation of wheat under different water treatments.”
Claim · model-written summary
Nitrogen supply increased wheat grain yield under moderate water supply.
- Taxon
- wheatTriticum aestivume0t0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrogen supply increased grain yield under CK and drought”
t0“Effects of nitrogen supply on nitrogen metabolism and grain protein accumulation of wheat under different water treatments.”
Claim · model-written summary
Nitrogen supply increased wheat grain yield under drought.
- Taxon
- wheatTriticum aestivume0t0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrogen supply increased grain yield under CK and drought”
t0“Effects of nitrogen supply on nitrogen metabolism and grain protein accumulation of wheat under different water treatments.”
Claim · model-written summary
Nitrogen supply reduced wheat grain yield under waterlogging.
- Taxon
- wheatTriticum aestivume0t0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrogen supply increased grain yield under CK and drought,but reduced it under waterlogging”
t0“Effects of nitrogen supply on nitrogen metabolism and grain protein accumulation of wheat under different water treatments.”
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See all 479 papers →8 of 10 groups shown: named compounds and organisms first, then groups whose results differ (checked claim by claim), then those with positive and negative results, then the smaller groups.
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.