Abstract
Investigations into the potential application of nanoparticles acting as nanofungicides in sustainable agriculture are rapidly expanding due to the high antimicrobial properties of these compounds, which do not risk inducing pathogen resistance to fungicides. A detailed understanding of the impact of copper oxide nanoparticles (CuO NPs) on soil-borne phytopathogenic fungi is yet to be obtained. This study aimed to explore the in vitro antifungal activity and control efficacy of CuO NPs applied via irrigation with respect to tobacco black shank (TBS) disease caused by Phytophthora nicotianae. The results revealed that CuO NPs greatly interfered with the reproductive growth process of this fungus, repressing hyphal growth, spore germination and sporangium production. Additionally, morphological damage, intracellular ROS accumulation and increased SOD enzyme activity in hyphae were the antifungicidal mechanisms of these NPs. In pot experiments, treatment with CuO NPs at 100 mg L-1 significantly suppressed TBS development, compared with the effect on control plants, and the control efficacy reached 33.69% without inducing phytotoxicity. Exposure to CuO NPs significantly activated a series of defense enzymes, and resistance genes in tobacco can further explain the mechanisms by which CuO NPs suppressed fungal infection. The Cu content in both the leaves and roots of P. nicotianae-infested plants increased by 50.03 and 27.25%, respectively, after treatment with 100 mg L-1 CuO NPs, compared with that of healthy plants. In particular, a higher Cu content was observed in infected roots than in leaves. Therefore, this study showed the potential of CuO NPs applied as nanofungicides and as nanoinducers of fungus resistance genes for the management of TBS through inhibition of pathogen infection and stimulation of plant defenses.
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Claims 10
Claim · model-written summary
CuO nanoparticles repressed Phytophthora nicotianae hyphal growth.
- Taxon
- tobacco
Nicotiana tabacumt0 - Treatment
- CuO NPse0
- Interactor
- Phytophthora nicotianae
Phytophthora nicotianaet0pathogene0 - Outcome
- hyphal growthe0
- Direction
- repressinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“CuO NPs greatly interfered with the reproductive growth process of this fungus, repressing hyphal growth, spore germination and sporangium production”
t0“tobacco against the soil-borne fungal pathogen Phytophthora nicotianae”
Claim · model-written summary
CuO nanoparticles repressed Phytophthora nicotianae spore germination.
- Taxon
- tobaccoNicotiana tabacumt0
- Treatment
- CuO NPse0
- Interactor
- Phytophthora nicotianaePhytophthora nicotianaet0pathogene0
- Outcome
- spore germinatione0
- Direction
- repressinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“CuO NPs greatly interfered with the reproductive growth process of this fungus, repressing hyphal growth, spore germination and sporangium production”
t0“tobacco against the soil-borne fungal pathogen Phytophthora nicotianae”
Claim · model-written summary
CuO nanoparticles repressed Phytophthora nicotianae sporangium production.
- Taxon
- tobaccoNicotiana tabacumt0
- Treatment
- CuO NPse0
- Interactor
- Phytophthora nicotianaePhytophthora nicotianaet0pathogene0
- Outcome
- sporangium productione0
- Direction
- repressinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“CuO NPs greatly interfered with the reproductive growth process of this fungus, repressing hyphal growth, spore germination and sporangium production”
t0“tobacco against the soil-borne fungal pathogen Phytophthora nicotianae”
Claim · model-written summary
CuO nanoparticles significantly suppressed tobacco black shank development with 33.69% efficacy.
- Taxon
- tobaccoNicotiana tabacumt0
- Treatment
- CuO NPs at 100 mg L-1e0
- Outcome
- TBS developmente0
- Direction
- suppressede0
- Value
- 33.69%e0
- Comparator
- control plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“treatment with CuO NPs at 100 mg L-1 significantly suppressed TBS development, compared with the effect on control plants, and the control efficacy reached 33.69% without inducing phytotoxicity”
t0“tobacco”
Claim · model-written summary
CuO nanoparticle treatment did not induce tobacco phytotoxicity.
- Taxon
- tobaccoNicotiana tabacumt0
- Outcome
- without inducing phytotoxicitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“without inducing phytotoxicity”
t0“tobacco”
Claim · model-written summary
CuO nanoparticle exposure significantly activated tobacco defense enzymes.
- Taxon
- tobaccoNicotiana tabacume0
- Treatment
- CuO NPse0
- Outcome
- defense enzymese0
- Direction
- activatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Exposure to CuO NPs significantly activated a series of defense enzymes, and resistance genes in tobacco”
Claim · model-written summary
CuO nanoparticle exposure significantly activated tobacco resistance genes.
- Taxon
- tobaccoNicotiana tabacume0
- Treatment
- CuO NPse0
- Outcome
- resistance genese0
- Direction
- activatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Exposure to CuO NPs significantly activated a series of defense enzymes, and resistance genes in tobacco”
Claim · model-written summary
Cu in leaves of infected treated plants increased 50.03% relative to healthy plants.
- Taxon
- tobaccoNicotiana tabacumt0
- Organ / stage
- leavese0
- Treatment
- 100 mg L-1 CuO NPse0
- Interactor
- P. nicotianaePhytophthora nicotianaee0pathogen
- Outcome
- Cu contente0
- Direction
- increasede0
- Value
- 50.03e0
- Comparator
- healthy plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The Cu content in both the leaves and roots of P. nicotianae-infested plants increased by 50.03 and 27.25%, respectively, after treatment with 100 mg L-1 CuO NPs, compared with that of healthy plants”
t0“tobacco”
Claim · model-written summary
Cu in roots of infected treated plants increased 27.25% relative to healthy plants.
- Taxon
- tobaccoNicotiana tabacumt0
- Organ / stage
- rootse0
- Treatment
- 100 mg L-1 CuO NPse0
- Interactor
- P. nicotianaePhytophthora nicotianaee0pathogen
- Outcome
- Cu contente0
- Direction
- increasede0
- Value
- 27.25%e0
- Comparator
- healthy plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The Cu content in both the leaves and roots of P. nicotianae-infested plants increased by 50.03 and 27.25%, respectively, after treatment with 100 mg L-1 CuO NPs, compared with that of healthy plants”
t0“tobacco”
Claim · model-written summary
Infected roots had more copper than leaves.
- Taxon
- tobaccoNicotiana tabacumt0
- Organ / stage
- infected rootse0
- Outcome
- Cu contente0
- Direction
- highere0
- Comparator
- leavese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a higher Cu content was observed in infected roots than in leaves”
t0“tobacco”
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See all 7 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.