Abstract
Formulations that include nanoparticles of CuO and ZnO are being considered for agricultural applications as fertilizers because they act as sources of Cu or Zn. Currently, few studies of the effects of these nanoparticles (NPs) consider the three-way interactions of NPs with the plant plus its microbiome. At doses that produced root shortening by both nanoparticles (NPs), CuO NPs induced the proliferation of elongated root hairs close to the root tip, and ZnO NPs increased lateral root formation in wheat seedlings (Triticum aestivum L.). These responses occurred with roots colonized by a beneficial bacterium, Pseudomonas chlororaphis O6 (PcO6), originally isolated from roots of wheat grown under dryland farming in calcareous soils. The PcO6-induced tolerance to drought stress in wheat seedlings was not impaired by the NPs. Rather, growth of the PcO6-colonized plants with NPs resulted in systemic increases in the expression of genes associated with tolerance to water stress. Increased expression in the shoots of other genes related to metal stress was consistent with higher levels of Cu and Zn in PcO6-colonized shoots grown with the NPs. This work demonstrates that plants grown with CuO or ZnO NPs showed cross-protection from different challenges such as metal stress and drought.
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Claims 7
Claim · model-written summary
Both nanoparticles shortened wheat roots.
- Taxon
- wheat seedlings
Triticum aestivumt0 - Treatment
- both nanoparticles (NPs)e0
- Outcome
- root shorteninge0
- Direction
- shorteninge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At doses that produced root shortening by both nanoparticles (NPs)”
t0“wheat seedlings (Triticum aestivum L.)”
Claim · model-written summary
CuO NPs induced elongated root hairs near the root tip.
- Taxon
- wheat seedlingsTriticum aestivumt0
- Treatment
- CuO NPse0
- Outcome
- proliferation of elongated root hairse0
- Direction
- proliferatione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“CuO NPs induced the proliferation of elongated root hairs close to the root tip”
t0“wheat seedlings (Triticum aestivum L.)”
Claim · model-written summary
ZnO NPs increased lateral root formation.
- Taxon
- wheat seedlingsTriticum aestivume0
- Treatment
- ZnO NPse0
- Outcome
- lateral root formatione0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“ZnO NPs increased lateral root formation in wheat seedlings (Triticum aestivum L.)”
Claim · model-written summary
Nanoparticles did not impair PcO6-induced drought tolerance.
- Taxon
- wheat seedlingsTriticum aestivume0
- Treatment
- NPse0
- Interactor
- PcO6e0symbiont
- Outcome
- PcO6-induced tolerance to drought stresse0
- Direction
- not impairede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The PcO6-induced tolerance to drought stress in wheat seedlings was not impaired by the NPs.”
Claim · model-written summary
Nanoparticle exposure increased expression of water-stress tolerance genes in PcO6-colonized wheat.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- NPse0
- Interactor
- PcO6e0symbiont
- Outcome
- expression of genes associated with tolerance to water stresse0
- Direction
- increasese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“growth of the PcO6-colonized plants with NPs resulted in systemic increases in the expression of genes associated with tolerance to water stress”
t0“wheat seedlings (Triticum aestivum L.)”
Claim · model-written summary
Shoots of PcO6-colonized plants grown with nanoparticles had increased expression of metal-stress genes.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- NPse0
- Interactor
- PcO6e0symbiont
- Outcome
- expression in the shoots of other genes related to metal stresse0
- Direction
- Increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increased expression in the shoots of other genes related to metal stress was consistent with higher levels of Cu and Zn in PcO6-colonized shoots grown with the NPs.”
t0“wheat seedlings (Triticum aestivum L.)”
Claim · model-written summary
PcO6-colonized shoots grown with nanoparticles had higher Cu and Zn levels.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- NPse0
- Interactor
- PcO6e0symbiont
- Outcome
- levels of Cu and Zne0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“higher levels of Cu and Zn in PcO6-colonized shoots grown with the NPs”
t0“wheat seedlings (Triticum aestivum L.)”
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See all 17 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.