Abstract
Strategies to reduce crop losses due to drought are needed as climate variability affects agricultural productivity. Wheat (Triticum aestivum var. Juniper) growth in a nutrient-sufficient, solid growth matrix containing varied doses of CuO, ZnO, and SiO2 nanoparticles (NPs) was used to evaluate NP mitigation of drought stress. NP amendments were at fertilizer levels, with maxima of 30 Cu, 20 Zn, and 200 Si (mg metal/kg matrix). Seeds of this drought-tolerant cultivar were inoculated with Pseudomonas chlororaphis O6 (PcO6) to provide a protective root microbiome. An 8 day drought imposed on 14 day-old wheat seedlings decreased shoot and root mass, shoot water content, and the quantum yield of photosystem II when compared to watered plants. PcO6 root colonization was not impaired by drought or NPs. A dose-dependent increase in the Cu, Zn, and Si from the NPs was observed from analysis of the rhizosphere solution, and this process was not affected by drought. Consequently, fertilizer concentrations of the NPs did not further improve drought tolerance in wheat seedlings under the growth conditions of adequate mineral nutrition and the presence of a beneficial microbiome. These findings suggest that potential NP benefits in promoting plant drought tolerance occur only under certain environmental conditions.
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Claims 6
Claim · model-written summary
An 8-day drought decreased shoot and root mass and shoot water content in wheat compared with watered plants.
- Taxon
- wheat
Triticum aestivume2 - Material
- Triticum aestivum var. Junipere0
- Treatment
- An 8 day droughte2
- Outcome
- shoot and root mass, shoot water contente2
- Direction
- decreasede2
- Comparator
- watered plantse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Wheat (Triticum aestivum var. Juniper) growth in a nutrient-sufficient, solid growth matrix containing varied doses of CuO, ZnO, and SiO2 nanoparticles (NPs) was used to evaluate NP mitigation of drought stress”
e2“An 8 day drought imposed on 14 day-old wheat seedlings decreased shoot and root mass, shoot water content, and the quantum yield of photosystem II when compared to watered plants”
Claim · model-written summary
An 8-day drought decreased the quantum yield of photosystem II in wheat compared with watered plants.
- Taxon
- wheat seedlingsTriticum aestivume2
- Treatment
- An 8 day droughte2
- Outcome
- quantum yield of photosystem IIe2
- Direction
- decreasede2
- Comparator
- watered plantse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“An 8 day drought imposed on 14 day-old wheat seedlings decreased shoot and root mass, shoot water content, and the quantum yield of photosystem II when compared to watered plants”
Claim · model-written summary
Root colonization by Pseudomonas chlororaphis O6 was not impaired by drought or nanoparticles.
- Taxon
- wheatTriticum aestivume0
- Treatment
- drought or NPse3
- Interactor
- Pseudomonas chlororaphis O6Pseudomonas chlororaphis O6e1symbiont
- Outcome
- PcO6 root colonizatione3
- Direction
- not impairede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Wheat (Triticum aestivum var. Juniper) growth in a nutrient-sufficient, solid growth matrix containing varied doses of CuO, ZnO, and SiO2 nanoparticles (NPs) was used to evaluate NP mitigation of drought stress”
e1“Seeds of this drought-tolerant cultivar were inoculated with Pseudomonas chlororaphis O6 (PcO6) to provide a protective root microbiome”
e3“PcO6 root colonization was not impaired by drought or NPs”
Claim · model-written summary
Cu, Zn and Si in the rhizosphere solution showed a dose-dependent increase from the nanoparticles.
- Taxon
- wheatTriticum aestivume0
- Treatment
- CuO, ZnO, and SiO2 nanoparticlese0
- Outcome
- Cu, Zn, and Sie4
- Direction
- dose-dependent increasee4
- Qualifier
- rhizosphere solutione4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Wheat (Triticum aestivum var. Juniper) growth in a nutrient-sufficient, solid growth matrix containing varied doses of CuO, ZnO, and SiO2 nanoparticles (NPs) was used to evaluate NP mitigation of drought stress”
e4“A dose-dependent increase in the Cu, Zn, and Si from the NPs was observed from analysis of the rhizosphere solution, and this process was not affected by drought”
Claim · model-written summary
Drought did not affect the release of Cu, Zn and Si from the nanoparticles.
- Taxon
- wheatTriticum aestivume0
- Treatment
- droughte4
- Outcome
- Cu, Zn, and Sie4
- Direction
- not affectede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Wheat (Triticum aestivum var. Juniper) growth in a nutrient-sufficient, solid growth matrix containing varied doses of CuO, ZnO, and SiO2 nanoparticles (NPs) was used to evaluate NP mitigation of drought stress”
e4“A dose-dependent increase in the Cu, Zn, and Si from the NPs was observed from analysis of the rhizosphere solution, and this process was not affected by drought”
Claim · model-written summary
Fertilizer-level nanoparticles did not further improve drought tolerance in wheat seedlings.
- Taxon
- wheat seedlingsTriticum aestivume5
- Treatment
- fertilizer concentrations of the NPse5
- Outcome
- drought tolerancee5
- Direction
- did not further improvee5
- Qualifier
- under the growth conditions of adequate mineral nutrition and the presence of a beneficial microbiomee5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“Consequently, fertilizer concentrations of the NPs did not further improve drought tolerance in wheat seedlings under the growth conditions of adequate mineral nutrition and the presence of a beneficial microbiome”
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