Abstract
Abstract Although scarcity of irrigation water is one of the key limiting factors for wheat production in many regions of the world, by using partial irrigation at strategic times during the growing season, it might be possible to enhance productivity. We measured the changes in various parameters related to nitrogen (N) metabolism in flag leaf and grain of wheat ( Triticum aestivum L.) plants (cv. Jinan 17 and Lumai 21), which were subjected to five irrigation regimes until physiological maturity. Severely deficient or excessive irrigation during grain filling decreased the photosynthetic rate ( A ), the concentrations of N, free amino acid, and soluble protein, as well as the activities of nitrate reductase (NR) and glutamine synthetase (GS) and increased malondialdehyde (MDA) accumulation and endopeptidase (EP) activity, though grain protein concentration might mainly depend on genotype. The activities of NR and GS were significantly positively correlated with A , but those of EP were significantly negatively correlated with A. The results indicate that while severe water stress aggravates the adverse effect on nitrogen metabolism, excessive soil moisture is also not useful during the grain‐filling stage, resulting in lower grain yield and quality. Our results suggest that applying an optimal irrigation regime in wheat fields still plays an important role in the improvement of grain yield and quality.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 10
Claim · model-written summary
Severely deficient or excessive irrigation during grain filling decreased photosynthesis.
- Taxon
- wheat
Triticum aestivumt0 - Organ / stage
- grain fillinge0
- Treatment
- Severely deficient or excessive irrigatione0
- Outcome
- photosynthetic rate ( A )e0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“wheat”
e0“Severely deficient or excessive irrigation during grain filling decreased the photosynthetic rate ( A )”
Claim · model-written summary
These irrigation regimes decreased nitrogen, free amino acid, and soluble protein concentrations.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- Severely deficient or excessive irrigatione0
- Outcome
- concentrations of N, free amino acid, and soluble proteine0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“wheat”
e0“Severely deficient or excessive irrigation during grain filling decreased the photosynthetic rate ( A ), the concentrations of N, free amino acid, and soluble protein”
Claim · model-written summary
These regimes decreased nitrate reductase and glutamine synthetase activities.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- Severely deficient or excessive irrigatione0
- Gene
- nitrate reductase (NR) and glutamine synthetase (GS)e0
- Outcome
- activities of nitrate reductase (NR) and glutamine synthetase (GS)e0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“wheat”
e0“Severely deficient or excessive irrigation during grain filling decreased the photosynthetic rate ( A ), the concentrations of N, free amino acid, and soluble protein, as well as the activities of nitrate reductase (NR) and glutamine synthetase (GS)”
Claim · model-written summary
These regimes increased malondialdehyde accumulation.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- Severely deficient or excessive irrigatione0
- Outcome
- malondialdehyde (MDA) accumulatione0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“wheat”
e0“Severely deficient or excessive irrigation during grain filling decreased the photosynthetic rate ( A ), the concentrations of N, free amino acid, and soluble protein, as well as the activities of nitrate reductase (NR) and glutamine synthetase (GS) and increased malondialdehyde (MDA) accumulation”
Claim · model-written summary
These regimes increased endopeptidase activity.
- Taxon
- wheatTriticum aestivumt0
- Gene
- endopeptidase (EP)e0
- Outcome
- endopeptidase (EP) activitye0
- Direction
- increasede0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“wheat”
e0“increased malondialdehyde (MDA) accumulation and endopeptidase (EP) activity”
Claim · model-written summary
Grain protein concentration may depend mainly on genotype.
- Taxon
- wheatTriticum aestivumt0
- Material
- genotypee0
- Outcome
- grain protein concentratione0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“wheat”
e0“grain protein concentration might mainly depend on genotype”
Claim · model-written summary
Nitrate reductase and glutamine synthetase activities correlated positively with photosynthetic rate.
- Taxon
- wheatTriticum aestivumt0
- Gene
- NR and GSe0
- Outcome
- activities of NR and GSe0
- Direction
- positivelye0
- Qualifier
- Ae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“wheat”
e0“The activities of NR and GS were significantly positively correlated with A”
Claim · model-written summary
Endopeptidase activity correlated negatively with photosynthetic rate.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“wheat”
e0“those of EP were significantly negatively correlated with A”
Claim · model-written summary
Severe water stress and excessive soil moisture were associated with lower grain yield and quality.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- excessive soil moisturee0
- Outcome
- grain yield and qualitye0
- Direction
- lowere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“wheat”
e0“severe water stress aggravates the adverse effect on nitrogen metabolism, excessive soil moisture is also not useful during the grain‐filling stage, resulting in lower grain yield and quality”
Claim · model-written summary
The authors suggest an optimal irrigation regime to improve wheat grain yield and quality.
- Taxon
- wheatTriticum aestivume0
- Outcome
- applying an optimal irrigation regime in wheat fieldse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“applying an optimal irrigation regime in wheat fields still plays an important role in the improvement of grain yield and quality”
The same questions in other papers
soil water · quality: general · Triticum aestivum (wheat)Positive and negative results
1 paper in the same direction as this paper · 2 in the opposite direction
- positive
- positive
- negative
irrigation · physiology: enzyme activity · Triticum aestivum (wheat)Positive and negative results
2 papers in the same direction as this paper · 4 in the opposite direction
- positive
- positive
- positive
3 papers more in this group
See all 7 papers →irrigation · physiology: oxidative · Triticum aestivum (wheat)Positive and negative results
4 papers in the same direction as this paper · 9 in the opposite direction
- positive
- positive
- positive
10 papers more in this group
See all 14 papers →irrigation · physiology: osmolytes · Triticum aestivum (wheat)Positive and negative results
4 papers in the same direction as this paper · 12 in the opposite direction
- positive
- positive
- positive
13 papers more in this group
See all 17 papers →irrigation · physiology: photosynthesis · Triticum aestivum (wheat)Positive and negative results
17 papers in the same direction as this paper · 32 in the opposite direction
- positive
- positive
- positive
46 papers more in this group
See all 50 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.