Abstract
Strategies and coping mechanisms for stress tolerance under sub-optimal nutrition conditions could provide important guidelines for developing selection criteria in sustainable agriculture. Nitrogen (N) is one of the major nutrients limiting the growth and yield of crop plants, among which wheat is probably the most substantial to human diet worldwide. Physiological status and photosynthetic capacity of two contrasting wheat genotypes (old Slomer and modern semi-dwarf Enola) were evaluated at the seedling stage to assess how N supply affected osmotic stress tolerance and capacity of plants to survive drought periods. It was evident that higher N input in both varieties contributed to better performance under dehydration. The combination of lower N supply and water deprivation (osmotic stress induced by polyethylene glycol treatment) led to greater damage of the photosynthetic efficiency and a higher degree of oxidative stress than the individually applied stresses. The old wheat variety had better N assimilation efficiency, and it was also the one with better performance under N deficiency. However, when both N and water were deficient, the modern variety demonstrated better photosynthetic performance. It was concluded that different strategies for overcoming osmotic stress alone or in combination with low N could be attributed to differences in the genetic background. Better performance of the modern variety conceivably indicated that semi-dwarfing (Rht) alleles might have a beneficial effect in arid regions and N deficiency conditions.
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Claims 8
Claim · model-written summary
Higher nitrogen input improved performance under dehydration in both wheat varieties.
- Taxon
- Wheat
Triticum aestivumt0 - Treatment
- higher N inpute0
- Outcome
- performance under dehydratione0
- Direction
- bettere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“higher N input in both varieties contributed to better performance under dehydration”
t0“Optimal Nitrogen Supply Ameliorates the Performance of Wheat Seedlings under Osmotic Stress in Genotype-Specific Manner”
Claim · model-written summary
Combined low N and water deprivation caused greater damage photosynthetic efficiency than either stress alone.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- lower N supply and water deprivatione0
- Outcome
- photosynthetic efficiencye0
- Direction
- greater damagee0
- Comparator
- individually applied stressese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The combination of lower N supply and water deprivation (osmotic stress induced by polyethylene glycol treatment) led to greater damage of the photosynthetic efficiency and a higher degree of oxidative stress than the individually applied stresses.”
t0“Optimal Nitrogen Supply Ameliorates the Performance of Wheat Seedlings under Osmotic Stress in Genotype-Specific Manner”
Claim · model-written summary
Combined low N and water deprivation caused higher oxidative stress than either stress alone.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- lower N supply and water deprivatione0
- Outcome
- oxidative stresse0
- Direction
- highere0
- Comparator
- individually applied stressese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The combination of lower N supply and water deprivation (osmotic stress induced by polyethylene glycol treatment) led to greater damage of the photosynthetic efficiency and a higher degree of oxidative stress than the individually applied stresses.”
t0“Optimal Nitrogen Supply Ameliorates the Performance of Wheat Seedlings under Osmotic Stress in Genotype-Specific Manner”
Claim · model-written summary
The old wheat variety had better N assimilation efficiency.
- Taxon
- WheatTriticum aestivumt0
- Material
- old wheat varietye0
- Outcome
- N assimilation efficiencye0
- Direction
- bettere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The old wheat variety had better N assimilation efficiency, and it was also the one with better performance under N deficiency.”
t0“Optimal Nitrogen Supply Ameliorates the Performance of Wheat Seedlings under Osmotic Stress in Genotype-Specific Manner”
Claim · model-written summary
The old wheat variety had better performance under N deficiency.
- Taxon
- WheatTriticum aestivumt0
- Material
- old wheat varietye0
- Outcome
- performance under N deficiencye0
- Direction
- bettere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The old wheat variety had better N assimilation efficiency, and it was also the one with better performance under N deficiency.”
t0“Optimal Nitrogen Supply Ameliorates the Performance of Wheat Seedlings under Osmotic Stress in Genotype-Specific Manner”
Claim · model-written summary
The modern variety had better photosynthetic performance when both N and water were deficient.
- Taxon
- WheatTriticum aestivumt0
- Material
- modern varietye0
- Outcome
- photosynthetic performancee0
- Direction
- bettere0
- Qualifier
- both N and water were deficiente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“when both N and water were deficient, the modern variety demonstrated better photosynthetic performance”
t0“Optimal Nitrogen Supply Ameliorates the Performance of Wheat Seedlings under Osmotic Stress in Genotype-Specific Manner”
Claim · model-written summary
The authors attributed different osmotic stress coping strategies to genetic background.
- Taxon
- WheatTriticum aestivumt0
- Outcome
- different strategies for overcoming osmotic stresse0
- Qualifier
- differences in the genetic backgrounde0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“different strategies for overcoming osmotic stress alone or in combination with low N could be attributed to differences in the genetic background”
t0“Optimal Nitrogen Supply Ameliorates the Performance of Wheat Seedlings under Osmotic Stress in Genotype-Specific Manner”
Claim · model-written summary
Semi-dwarfing Rht alleles might benefit wheat in arid and nitrogen deficient conditions.
- Taxon
- WheatTriticum aestivumt0
- Gene
- Rhte0
- Outcome
- beneficial effecte0
- Qualifier
- arid regions and N deficiency conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“semi-dwarfing (Rht) alleles might have a beneficial effect in arid regions and N deficiency conditions”
t0“Optimal Nitrogen Supply Ameliorates the Performance of Wheat Seedlings under Osmotic Stress in Genotype-Specific Manner”
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