Abstract
Interest in the use of silver as a component of plant protection products and growth regulators appeared relatively recently with the development of methods for the effective stabilization of colloidal systems containing nanoparticles of this metal. In the present work, we studied the effect of foliar treatments with aqueous dispersions of silver nanoparticles stabilized by polyhexamethylene biguanide hydrochloride with an average diameter of 6 ± 1 nm and a zeta-potential of +47.4 ± 1.3 mV on legume-Rhizobium symbiosis, which largely determines the efficiency of soil nitrogen assimilation and the yield of soybean (Glycine max L. Merr.). Based on the results of a two-year field experiment, it was shown that treatments with low doses of silver nanoparticles lead to a significant increase in the number of root nodules and an increase in soybean yield. The observed biological effectiveness of silver nanoparticles dispersions is explained by an increase in the enzymatic activity of peroxidases and polyphenol oxidases in the terrestrial part of plants. It is very likely that the treatment with silver nanoparticles and the increase in peroxidase activity in non-infected parts of the plant lead to a more effective prevention of the penetration of rhizobacteria into the aboveground soybean organs, which, in turn, may be the reason for the observed decrease in the activity of peroxidase and polyphenol oxidase in parts of plant roots susceptible to rhizobia. The latter, as is known, contributes to an easier flow of the nodulation process and the development of legume–Rhizobium symbiosis.
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Claims 6
Claim · model-written summary
Low-dose silver nanoparticles significantly increased soybean root nodules.
- Taxon
- soybean
Glycine maxt0 - Treatment
- low doses of silver nanoparticlese0
- Outcome
- number of root nodulese0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“treatments with low doses of silver nanoparticles lead to a significant increase in the number of root nodules”
t0“Soybean”
Claim · model-written summary
Low-dose silver nanoparticles increased soybean yield.
- Taxon
- soybeanGlycine maxe0
- Treatment
- low doses of silver nanoparticlese0
- Outcome
- soybean yielde0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“treatments with low doses of silver nanoparticles lead to a significant increase in the number of root nodules and an increase in soybean yield.”
Claim · model-written summary
The authors attributed biological effectiveness to increased peroxidase activity in shoots.
- Taxon
- soybeanGlycine maxt0
- Gene
- peroxidasese0
- Outcome
- biological effectivenesse0
- Direction
- increasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The observed biological effectiveness of silver nanoparticles dispersions is explained by an increase in the enzymatic activity of peroxidases and polyphenol oxidases in the terrestrial part of plants.”
t0“Soybean”
Claim · model-written summary
The authors attributed biological effectiveness to increased polyphenol oxidase activity in shoots.
- Taxon
- soybeanGlycine maxt0
- Gene
- polyphenol oxidasese0
- Outcome
- biological effectivenesse0
- Direction
- increasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The observed biological effectiveness of silver nanoparticles dispersions is explained by an increase in the enzymatic activity of peroxidases and polyphenol oxidases in the terrestrial part of plants.”
t0“Soybean”
Claim · model-written summary
The authors propose that silver treatment and peroxidase activity impede rhizobacteria entering aboveground soybean organs.
- Taxon
- soybeanGlycine maxe0
- Treatment
- treatment with silver nanoparticlese0
- Interactor
- rhizobacteriaHyphomicrobialese0symbiont
- Gene
- peroxidasee0
- Outcome
- penetration of rhizobacteria into the aboveground soybean organse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the treatment with silver nanoparticles and the increase in peroxidase activity in non-infected parts of the plant lead to a more effective prevention of the penetration of rhizobacteria into the aboveground soybean organs”
Claim · model-written summary
The authors propose a resulting decrease in peroxidase and polyphenol oxidase activity in susceptible roots.
- Taxon
- soybeanGlycine maxt0
- Organ / stage
- plant rootse0
- Interactor
- rhizobiae0symbiont
- Gene
- peroxidasee0
- Outcome
- activity of peroxidase and polyphenol oxidasee0
- Direction
- decreasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“observed decrease in the activity of peroxidase and polyphenol oxidase in parts of plant roots susceptible to rhizobia.”
t0“Soybean”
The same questions in other papers
silver nanoparticle · yield · Glycine max (soybean)Results differ
2 in the opposite direction
- no effect
- no effect
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.