Abstract
Soybean is a high valuable crop of Vietnam and many other countries. The ability of soybean plants in nitrogen fixation and soil improvement is attributed to their symbiosis with different rhizobia in the root nodules. It has been well documented that members of genus Rhizobium are the most effective in nodulation and nitrogen fixation in legumes. Recently, in oder to minimize undesired accumulation of agro-chemicals and metal salts in soil, nanotechnology products have been intensively studied and applied as nanofertilizers. In this report, the effect of nanoparticles of iron, cobalt and copper on the in vitro growth of nitrogen fixing bacterium Sinorhizobium fredii T14 and nodulation in the root of soybean DT26 was studied. In the cultures of S. fredii T14, nano Fe at the final concentrations of 2, 5, 10, 25 and 50 ppm did not affect the growth, but the latter was reduced of 20, 35 and 46% at 100, 250 and 500 ppm, respectively. No growth inhibition was observed at nano Co concentrations below 10 ppm, while it was reduced of 73% at 500 ppm. Nano Cu seemed to have significant adverse effect on S. fredii T14, showing growth inhibition of 23, 68 and 100% at the concentrations of 5, 25 ppm and 50 ppm, respectively. The production of extracellular polysaccharide by S. fredii T14 was not affected at the concentrations of nano Fe and Co below 250 ppm, while drastic decrease occurred at the presence of nano Cu. Laboratory experiments showed that nanoparticles of all three studied metals at extremely low concentration of 2 ppm significantly increased the number of effective nodules in the roots of soybean DT26 and enhanced the plant growth.
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Claims 9
Claim · model-written summary
Nano Fe at 2–50 ppm did not affect S. fredii T14 growth.
- Taxon
- soybean
Glycine maxt0 - Treatment
- nano Fe at the final concentrations of 2, 5, 10, 25 and 50 ppme0
- Interactor
- S. fredii T14
.JPG?width=60)
Sinorhizobium frediie0symbiont - Outcome
- growthe0
- Direction
- did not affecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.JPG?width=500)
Schema note from the model: Rhizobial culture outcome measured without plant material; linked to soybean symbiosis.
Verbatim
e0“In the cultures of S. fredii T14, nano Fe at the final concentrations of 2, 5, 10, 25 and 50 ppm did not affect the growth”
t0“Effects of metal nanoparticles of iron, copper and cobalt on the growth of nitrogen-fixing bacterium Sinorhizobium fredii T14 and nodulation in soybean roots”
t1“Effects of metal nanoparticles of iron, copper and cobalt on the growth of nitrogen-fixing bacterium Sinorhizobium fredii T14 and nodulation in soybean roots”
Claim · model-written summary
Nano Fe reduced S. fredii T14 growth by 20%, 35%, and 46% at 100, 250, and 500 ppm, respectively.
- Taxon
- soybeanGlycine maxt0
- Treatment
- 100, 250 and 500 ppme0
- Outcome
- the lattere0
- Direction
- reducede0
- Value
- 20, 35 and 46%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Schema note from the model: Three doses have separate effects.
Verbatim
e0“the latter was reduced of 20, 35 and 46% at 100, 250 and 500 ppm, respectively”
t0“Effects of metal nanoparticles of iron, copper and cobalt on the growth of nitrogen-fixing bacterium Sinorhizobium fredii T14 and nodulation in soybean roots”
t1“Effects of metal nanoparticles of iron, copper and cobalt on the growth of nitrogen-fixing bacterium Sinorhizobium fredii T14 and nodulation in soybean roots”
Claim · model-written summary
Nano Co below 10 ppm did not inhibit rhizobial growth.
- Taxon
- soybeanGlycine maxt0
- Treatment
- nano Co concentrations below 10 ppme0
- Outcome
- growth inhibitione0
- Direction
- No growth inhibitione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“No growth inhibition was observed at nano Co concentrations below 10 ppm”
t0“Effects of metal nanoparticles of iron, copper and cobalt on the growth of nitrogen-fixing bacterium Sinorhizobium fredii T14 and nodulation in soybean roots”
t1“Effects of metal nanoparticles of iron, copper and cobalt on the growth of nitrogen-fixing bacterium Sinorhizobium fredii T14 and nodulation in soybean roots”
Claim · model-written summary
Nano Co at 500 ppm reduced rhizobial growth by 73%.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“it was reduced of 73% at 500 ppm”
t0“Effects of metal nanoparticles of iron, copper and cobalt on the growth of nitrogen-fixing bacterium Sinorhizobium fredii T14 and nodulation in soybean roots”
t1“Effects of metal nanoparticles of iron, copper and cobalt on the growth of nitrogen-fixing bacterium Sinorhizobium fredii T14 and nodulation in soybean roots”
Claim · model-written summary
Nano Cu inhibited S. fredii T14 growth by 23%, 68%, and 100% at 5, 25, and 50 ppm, respectively.
- Taxon
- soybeanGlycine maxt0
- Treatment
- Nano Cue0
- Interactor
- S. fredii T14Sinorhizobium frediie0symbiont
- Outcome
- S. fredii T14, showing growth inhibitione0
- Direction
- growth inhibitione0
- Value
- 23, 68 and 100%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Schema note from the model: Three doses have separate effects.
Verbatim
e0“Nano Cu seemed to have significant adverse effect on S. fredii T14, showing growth inhibition of 23, 68 and 100% at the concentrations of 5, 25 ppm and 50 ppm, respectively”
t0“Effects of metal nanoparticles of iron, copper and cobalt on the growth of nitrogen-fixing bacterium Sinorhizobium fredii T14 and nodulation in soybean roots”
t1“Effects of metal nanoparticles of iron, copper and cobalt on the growth of nitrogen-fixing bacterium Sinorhizobium fredii T14 and nodulation in soybean roots”
Claim · model-written summary
Nano Fe and Co below 250 ppm did not affect S. fredii T14 extracellular polysaccharide production.
- Taxon
- soybeanGlycine maxt0
- Treatment
- nano Fe and Co below 250 ppme0
- Interactor
- S. fredii T14Sinorhizobium frediie0symbiont
- Outcome
- production of extracellular polysaccharide by S. fredii T14e0
- Direction
- not affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The production of extracellular polysaccharide by S. fredii T14 was not affected at the concentrations of nano Fe and Co below 250 ppm”
t0“Effects of metal nanoparticles of iron, copper and cobalt on the growth of nitrogen-fixing bacterium Sinorhizobium fredii T14 and nodulation in soybean roots”
t1“Effects of metal nanoparticles of iron, copper and cobalt on the growth of nitrogen-fixing bacterium Sinorhizobium fredii T14 and nodulation in soybean roots”
Claim · model-written summary
Nano Cu drastically decreased S. fredii T14 extracellular polysaccharide production.
- Taxon
- soybeanGlycine maxt0
- Treatment
- nano Cue0
- Outcome
- drastic decreasee0
- Direction
- drastic decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“while drastic decrease occurred at the presence of nano Cu”
t0“Effects of metal nanoparticles of iron, copper and cobalt on the growth of nitrogen-fixing bacterium Sinorhizobium fredii T14 and nodulation in soybean roots”
t1“Effects of metal nanoparticles of iron, copper and cobalt on the growth of nitrogen-fixing bacterium Sinorhizobium fredii T14 and nodulation in soybean roots”
Claim · model-written summary
At 2 ppm, nanoparticles of all three metals increased effective nodule number in soybean DT26 roots.
- Taxon
- soybean DT26e0
- Organ / stage
- rootse0
- Treatment
- nanoparticles of all three studied metals at extremely low concentration of 2 ppme0
- Outcome
- number of effective nodulese0
- Direction
- increasede0
Not reportedComparator
Verbatim
e0“nanoparticles of all three studied metals at extremely low concentration of 2 ppm significantly increased the number of effective nodules in the roots of soybean DT26”
t0“Effects of metal nanoparticles of iron, copper and cobalt on the growth of nitrogen-fixing bacterium Sinorhizobium fredii T14 and nodulation in soybean roots”
t1“Effects of metal nanoparticles of iron, copper and cobalt on the growth of nitrogen-fixing bacterium Sinorhizobium fredii T14 and nodulation in soybean roots”
Claim · model-written summary
At 2 ppm, nanoparticles of all three metals enhanced soybean plant growth.
- Taxon
- soybean DT26e0
- Treatment
- nanoparticles of all three studied metals at extremely low concentration of 2 ppme0
- Outcome
- plant growthe0
- Direction
- enhancede0
Not reportedComparator
Verbatim
e0“nanoparticles of all three studied metals at extremely low concentration of 2 ppm significantly increased the number of effective nodules in the roots of soybean DT26 and enhanced the plant growth”
t0“Effects of metal nanoparticles of iron, copper and cobalt on the growth of nitrogen-fixing bacterium Sinorhizobium fredii T14 and nodulation in soybean roots”
t1“Effects of metal nanoparticles of iron, copper and cobalt on the growth of nitrogen-fixing bacterium Sinorhizobium fredii T14 and nodulation in soybean roots”
The same questions in other papers
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1 in the opposite direction
- positive
nanoparticle · disease · Glycine max (soybean)Positive and negative results
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- positive
- positive
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See all 12 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.