Abstract
Soybeans (Glycine max [L.] Merr.) grown in Ni-deficient nutrient solutions accumulated toxic urea concentrations which resulted in necrosis of their leaflet tips, a characteristic of Ni deficiency. Estimates of the Ni requirement of a plant were made by using seeds produced with different initial Ni contents. When compared to soybeans grown from seeds containing 2.5 nanograms Ni, plants grown from seeds containing 13 nanograms Ni had a significantly reduced incidence of leaflet tip necrosis. Plants grown from seeds containing 160 nanograms Ni produced leaves with almost no leaflet tip necrosis symptoms. Neither Al, Cd, Sn, nor V were able to substitute for Ni.In other experiments, a small excess of EDTA was included in the nutrient solution in addition to that needed to chelate micronutrient metals. Under these conditions, nodulated nitrogen-fixing soybeans had a high incidence of leaflet tip necrosis, even when 1 micromolar NiEDTA was supplied. However, in nutrient solutions containing inorganic sources of N, 1 micromolar NiEDTA almost completely prevented leaflet tip necrosis, although no significant increase in leaf urease activity was observed. Cowpeas (Vigna unguiculata [L.] Walp) grown in Ni-deficient nutrient solutions containing NO(3) and NH(4) also developed leaflet tip necrosis, which was analogous to that produced in soybeans, and 1 micromolar NiEDTA additions prevented these symptoms.These findings further support our contention that Ni is an essential element for higher plants.
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Claims 11
Claim · model-written summary
Soybeans grown in Ni-deficient nutrient solutions accumulated toxic urea concentrations.
- Taxon
- Soybeans
Glycine maxe0 - Treatment
- Ni-deficient nutrient solutionse0
- Outcome
- toxic urea concentrationse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soybeans (Glycine max [L.] Merr.) grown in Ni-deficient nutrient solutions accumulated toxic urea concentrations which resulted in necrosis of their leaflet tips”
Claim · model-written summary
Soybeans grown in Ni-deficient nutrient solutions developed necrosis of the leaflet tips, a characteristic of Ni deficiency.
- Taxon
- SoybeansGlycine maxe0
- Organ / stage
- leaflet tipse0
- Treatment
- Ni-deficient nutrient solutionse0
- Outcome
- necrosis of their leaflet tipse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soybeans (Glycine max [L.] Merr.) grown in Ni-deficient nutrient solutions accumulated toxic urea concentrations which resulted in necrosis of their leaflet tips”
Claim · model-written summary
Plants from seeds with 13 nanograms Ni had a significantly reduced incidence of leaflet tip necrosis compared with seeds with 2.5 nanograms Ni.
- Taxon
- soybeansGlycine maxe1
- Treatment
- seeds containing 13 nanograms Nie1
- Outcome
- incidence of leaflet tip necrosise1
- Direction
- significantly reducede1
- Comparator
- seeds containing 2.5 nanograms Nie1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“When compared to soybeans grown from seeds containing 2.5 nanograms Ni, plants grown from seeds containing 13 nanograms Ni had a significantly reduced incidence of leaflet tip necrosis”
Claim · model-written summary
Plants from seeds with 160 nanograms Ni produced leaves with almost no leaflet tip necrosis symptoms.
- Taxon
- SoybeansGlycine maxe0
- Treatment
- seeds containing 160 nanograms Nie1
- Outcome
- leaflet tip necrosis symptomse1
- Qualifier
- almost noe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soybeans (Glycine max [L.] Merr.)”
e1“Plants grown from seeds containing 160 nanograms Ni produced leaves with almost no leaflet tip necrosis symptoms”
Claim · model-written summary
Al, Cd, Sn, nor V did not substitute for Ni in soybean.
- Taxon
- SoybeansGlycine maxe0
- Treatment
- Al, Cd, Sn, nor Ve1
- Outcome
- substitute for Nie1
- Comparator
- Nie1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soybeans (Glycine max [L.] Merr.)”
e1“Neither Al, Cd, Sn, nor V were able to substitute for Ni”
Claim · model-written summary
Nodulated soybeans with a small excess of EDTA in the nutrient solution had a high incidence of leaflet tip necrosis, even when 1 micromolar NiEDTA was supplied.
- Taxon
- soybeansGlycine maxe1
- Treatment
- a small excess of EDTA was included in the nutrient solutione0
- Outcome
- incidence of leaflet tip necrosise1
- Qualifier
- even when 1 micromolar NiEDTA was suppliede1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a small excess of EDTA was included in the nutrient solution”
e1“nodulated nitrogen-fixing soybeans had a high incidence of leaflet tip necrosis, even when 1 micromolar NiEDTA was supplied”
Claim · model-written summary
In nutrient solutions with inorganic N sources, 1 micromolar NiEDTA almost completely prevented leaflet tip necrosis in soybean.
- Taxon
- SoybeansGlycine maxe0
- Treatment
- 1 micromolar NiEDTAe1
- Outcome
- leaflet tip necrosise1
- Direction
- preventede1
- Qualifier
- in nutrient solutions containing inorganic sources of Ne1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soybeans (Glycine max [L.] Merr.)”
e1“However, in nutrient solutions containing inorganic sources of N, 1 micromolar NiEDTA almost completely prevented leaflet tip necrosis, although no significant increase in leaf urease activity was observed”
Claim · model-written summary
In soybean, 1 micromolar NiEDTA did not significantly increase leaf urease activity.
- Taxon
- SoybeansGlycine maxe0
- Treatment
- 1 micromolar NiEDTAe1
- Outcome
- leaf urease activitye1
- Direction
- no significant increasee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soybeans (Glycine max [L.] Merr.)”
e1“However, in nutrient solutions containing inorganic sources of N, 1 micromolar NiEDTA almost completely prevented leaflet tip necrosis, although no significant increase in leaf urease activity was observed”
Claim · model-written summary
Cowpeas grown in Ni-deficient solutions with NO(3) and NH(4) developed leaflet tip necrosis.
- Taxon
- Cowpeas
Vigna unguiculatae0 - Treatment
- Ni-deficient nutrient solutions containing NO(3) and NH(4)e0
- Outcome
- leaflet tip necrosise0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cowpeas (Vigna unguiculata [L.] Walp) grown in Ni-deficient nutrient solutions containing NO(3) and NH(4) also developed leaflet tip necrosis, which was analogous to that produced in soybeans, and 1 micromolar NiEDTA additions prevented these symptoms”
Claim · model-written summary
1 micromolar NiEDTA additions prevented leaflet tip necrosis in cowpea.
- Taxon
- CowpeasVigna unguiculatae0
- Treatment
- 1 micromolar NiEDTA additionse1
- Outcome
- leaflet tip necrosise0
- Direction
- preventede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cowpeas (Vigna unguiculata [L.] Walp) grown in Ni-deficient nutrient solutions containing NO(3) and NH(4) also developed leaflet tip necrosis, which was analogous to that produced in soybeans, and 1 micromolar NiEDTA additions prevented these symptoms”
e1“1 micromolar NiEDTA additions prevented these symptoms”
Claim · model-written summary
Ni is an essential element for higher plants.
- Taxon
- higher plantsEmbryophytae0
- Outcome
- Ni is an essential elemente0
Verbatim
e0“These findings further support our contention that Ni is an essential element for higher plants”
The same questions in other papers
nickel atom · disease · Glycine max (soybean)Results agree
1 paper in the same direction as this paper
- positive
nanoparticle · disease · Glycine max (soybean)Positive and negative results
8 papers in the same direction as this paper · 3 in the opposite direction
- no effect
- no effect
- negative
8 papers more in this group
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.