Abstract
The tillering phase of wheat (Triticum aestivum ) crops is extremely susceptible to drought. We explored the potential of silver nanoparticles (AgNPs) in protecting wheat genotypes from drought injury during this sensitive stage. After treating with AgNPs (60ppm), the plants were submitted to different water levels; i.e. 100% field capacity (FC), 75% FC (mild drought), 50% FC (moderate drought) and 25% FC (severe drought) from 15 to 41days after sowing (tillering phase). Leaf physiological data were collected at stress termination, while yield attributes were recorded at crop maturity. We found that increasing drought intensity significantly impaired leaf physiology and grain yield of both studied genotypes. Compared with control, moderately and severely drought-stressed plants produced 25% and 45% lesser grain yield per spike, respectively (averaged across genotypes and years of study). Likewise, moderate and severe drought reduced photosynthesis by 49% and 76%, respectively, compared with control. In contrast, AgNPs significantly restored leaf physiological functioning and grain yield formation at maturity. For example, under moderate and severe drought, AgNPs-treated plants produced 22% and 17% more grains per plant, respectively, than their respective water-treated plants. Our study suggests that exogenous AgNPs can protect wheat crops from drought during early development stages.
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Claims 9
Claim · model-written summary
Increasing drought intensity significantly impaired leaf physiology and grain yield in both genotypes.
- Taxon
- wheat
Triticum aestivumt0 - Treatment
- increasing drought intensitye0
- Outcome
- leaf physiology and grain yielde0
- Direction
- impairede0
- Qualifier
- both studied genotypese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“We found that increasing drought intensity significantly impaired leaf physiology and grain yield of both studied genotypes.”
t0“wheat”
Claim · model-written summary
Moderate drought reduced grain yield per spike by 25% relative to control.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- moderatelye0
- Outcome
- grain yield per spikee0
- Direction
- lessere0
- Value
- 25%e0
- Qualifier
- averaged across genotypes and years of studye0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared with control, moderately and severely drought-stressed plants produced 25% and 45% lesser grain yield per spike, respectively (averaged across genotypes and years of study).”
t0“wheat”
Claim · model-written summary
Severe drought reduced grain yield per spike by 45% relative to control.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- severely drought-stressede0
- Outcome
- grain yield per spikee0
- Direction
- lessere0
- Value
- 45%e0
- Qualifier
- averaged across genotypes and years of studye0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared with control, moderately and severely drought-stressed plants produced 25% and 45% lesser grain yield per spike, respectively (averaged across genotypes and years of study).”
t0“wheat”
Claim · model-written summary
Moderate drought reduced photosynthesis by 49% relative to control.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- moderatee0
- Outcome
- photosynthesise0
- Direction
- reducede0
- Value
- 49%e0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Likewise, moderate and severe drought reduced photosynthesis by 49% and 76%, respectively, compared with control.”
t0“wheat”
Claim · model-written summary
Severe drought reduced photosynthesis by 76% relative to control.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- severe droughte0
- Outcome
- photosynthesise0
- Direction
- reducede0
- Value
- 76%e0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Likewise, moderate and severe drought reduced photosynthesis by 49% and 76%, respectively, compared with control.”
t0“wheat”
Claim · model-written summary
AgNPs significantly restored leaf physiology and grain yield formation at maturity.
- Taxon
- wheatTriticum aestivumt0
- Organ / stage
- maturitye0
- Treatment
- AgNPse0
- Outcome
- leaf physiological functioning and grain yield formatione0
- Direction
- restorede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In contrast, AgNPs significantly restored leaf physiological functioning and grain yield formation at maturity.”
t0“wheat”
Claim · model-written summary
AgNPs-treated plants produced 22% more grains per plant under moderate drought than water-treated plants.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- AgNPs-treatede0
- Outcome
- grains per plante0
- Direction
- moree0
- Value
- 22%e0
- Qualifier
- moderatee0
- Comparator
- water-treated plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“under moderate and severe drought, AgNPs-treated plants produced 22% and 17% more grains per plant, respectively, than their respective water-treated plants.”
t0“wheat”
Claim · model-written summary
AgNPs-treated plants produced 17% more grains per plant under severe drought than water-treated plants.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- AgNPs-treatede0
- Outcome
- grains per plante0
- Direction
- moree0
- Value
- 17%e0
- Qualifier
- severe droughte0
- Comparator
- water-treated plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“under moderate and severe drought, AgNPs-treated plants produced 22% and 17% more grains per plant, respectively, than their respective water-treated plants.”
t0“wheat”
Claim · model-written summary
The authors suggest exogenous AgNPs can protect wheat from drought during early development.
- Taxon
- wheatTriticum aestivume0
- Treatment
- exogenous AgNPse0
- Outcome
- protect wheat crops from droughte0
- Qualifier
- during early development stagese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Our study suggests that exogenous AgNPs can protect wheat crops from drought during early development stages.”
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