Abstract
Wheat crop often gets exposed to drought and high temperature during grain growth particularly in subtropical conditions. Physiology of wheat is adversely affected by heat stress and drought stress. Heat and drought tolerance are influenced by some of the physiological traits such as increased rates of photosynthesis, stay green, chlorophyll concentration, chlorophyll fluorescence, and so on. Under drought stress wheat yield is mostly decreased by half or less of the irrigated control. Drought stress (60% relative soil moisture content) has been found to decrease the grain yield by more reduction in the kernel weight than the grain. Hence, any efforts to improve grain yield of wheat under these stresses should consider insights into the mechanisms of grain development and also the physiological traits when plants experience terminal stress. For improvement of grain weight of wheat under abiotic stress conditions caused by drought and high temperature found that drought stress decreased the grain yield per spike by 16.2% in the tolerant cultivar and by 27.9% in sensitive cultivar. But under combined heat and drought stress, the same cultivar did not show high tolerance. High temperature significantly reduced the grain weight and number of grains in wheat. Some other studies have reported that post anthesis rise in ambient temperature resulted in reduction in individual grain weight. So, it can be concluded that for the sustainability of the agriculture heat stress and drought are the major barrier in the field.
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Claims 11
Claim · model-written summary
Heat and drought adversely affect wheat physiology.
- Taxon
- wheat
Triticum aestivume0 - Treatment
- heat stress and drought stresse0
- Outcome
- Physiology of wheate0
- Direction
- adversely affectede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Physiology of wheat is adversely affected by heat stress and drought stress”
Claim · model-written summary
Drought tolerance is associated with photosynthesis, stay green, chlorophyll concentration, and fluorescence traits.
- Taxon
- wheatTriticum aestivume1
- Treatment
- droughte0
- Outcome
- Heat and drought tolerancee0
- Qualifier
- physiological traitse0
Not reportedOrgan / stageDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Heat and drought tolerance are influenced by some of the physiological traits such as increased rates of photosynthesis, stay green, chlorophyll concentration, chlorophyll fluorescence”
e1“Physiology of wheat is adversely affected”
Claim · model-written summary
Wheat yield under drought is mostly half or less than under irrigation.
- Taxon
- wheatTriticum aestivume0
- Treatment
- drought stresse0
- Outcome
- wheat yielde0
- Direction
- decreasede0
- Value
- half or lesse0
- Comparator
- irrigated controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under drought stress wheat yield is mostly decreased by half or less of the irrigated control”
Claim · model-written summary
Drought at 60% relative soil moisture reduced wheat grain yield.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- Drought stress (60% relative soil moisture content)e0
- Outcome
- grain yielde0
- Direction
- decreasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Drought stress (60% relative soil moisture content) has been found to decrease the grain yield”
t0“wheat”
Claim · model-written summary
Kernel weight fell more than grain number under drought.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- kernel weighte0
- Direction
- more reductione0
- Comparator
- the graine0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“more reduction in the kernel weight than the grain”
t0“wheat”
Claim · model-written summary
Drought decreased grain yield per spike by 16.2% in the tolerant cultivar.
- Taxon
- wheatTriticum aestivumt0
- Material
- tolerant cultivare0
- Treatment
- drought stresse0
- Outcome
- grain yield per spikee0
- Direction
- decreasede0
- Value
- 16.2%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“drought stress decreased the grain yield per spike by 16.2% in the tolerant cultivar”
t0“wheat”
Claim · model-written summary
Drought decreased grain yield per spike by 27.9% in the sensitive cultivar.
- Taxon
- wheatTriticum aestivumt0
- Material
- sensitive cultivare0
- Treatment
- drought stresse1
- Outcome
- grain yield per spikee1
- Direction
- decreasede1
- Value
- 27.9%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“by 27.9% in sensitive cultivar”
e1“drought stress decreased the grain yield per spike”
t0“wheat”
Claim · model-written summary
The drought tolerant cultivar did not show high tolerance under combined heat and drought.
- Taxon
- wheatTriticum aestivumt0
- Material
- tolerant cultivare1
- Treatment
- combined heat and drought stresse0
- Outcome
- did not show high tolerancee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“under combined heat and drought stress, the same cultivar did not show high tolerance”
e1“the tolerant cultivar”
t0“wheat”
Claim · model-written summary
High temperature significantly reduced wheat grain weight and grain number.
- Taxon
- wheatTriticum aestivume0
- Treatment
- High temperaturee0
- Outcome
- grain weight and number of grainse0
- Direction
- reducede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“High temperature significantly reduced the grain weight and number of grains in wheat”
Claim · model-written summary
Temperature rise after anthesis reduced individual wheat grain weight.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- post anthesis rise in ambient temperaturee0
- Outcome
- individual grain weighte0
- Direction
- reductione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“post anthesis rise in ambient temperature resulted in reduction in individual grain weight”
t0“wheat”
Claim · model-written summary
The authors recommend accounting for grain development mechanisms and physiological traits when improving wheat yield under terminal stress.
- Taxon
- wheatTriticum aestivume0
- Outcome
- should consider insights into the mechanisms of grain development and also the physiological traitse0
- Qualifier
- terminal stresse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“efforts to improve grain yield of wheat under these stresses should consider insights into the mechanisms of grain development and also the physiological traits when plants experience terminal stress”