Abstract
The effects of 0.25, 1.0, 2.5, 10, and 100 mg/liter of Mn on sweetpotato [Ipomoea batatas (L.) Lam.] were evaluated in 1990 and 1991 by use the nutrient film technique (NFT). A modified half strength Hoagland solution with MnCl 2 as the Mn source was used. Foliage and storage root dry weights declined linearly with increasing Mn concentration in whole plants, the decline occurring when Mn concentration approached 1000 ug/g. Storage root growth was severely restricted when Mn concentration in fibrous root reached 200 ug/g while foliage dry weight showed a more moderate decrease. Mn concentration was higher in the foliage than in fibrous roots. Roots of plants showed browning at higher (10 or 100 mg/liter) Mn concentrations in solution, which was stained blue with benzidine and bleached with oxalic-sulfuric acid solution, indicating the presence of oxidized Mn. Characteristic toxicity symptoms were observed in plants receiving 2.5, (moderate) 10 or 100 mg/liter Mn in solution. These results suggest that a Mn concentration of approximately 1000 ug/g in whole plants and 100 ug/g in fibrous roots are critical concentrations with respect to Mn toxicity in sweetpotato.
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Claims 8
Claim · model-written summary
Foliage and storage root dry weights of sweetpotato declined linearly with increasing Mn concentration in whole plants.
- Taxon
- sweetpotato
_Flower.jpg?width=60)
Ipomoea batatase0 - Treatment
- increasing Mn concentratione1
- Outcome
- Foliage and storage root dry weightse1
- Direction
- declinede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Flower.jpg?width=500)
Verbatim
e0“sweetpotato [Ipomoea batatas (L.) Lam.]”
e1“Foliage and storage root dry weights declined linearly with increasing Mn concentration in whole plants”
Claim · model-written summary
Storage root growth of sweetpotato was severely restricted when Mn concentration in fibrous root reached 200 ug/g.
- Taxon
- sweetpotatoIpomoea batatase0
- Organ / stage
- fibrous roote1
- Outcome
- Storage root growthe1
- Direction
- restrictede1
- Value
- 200 ug/ge1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“sweetpotato [Ipomoea batatas (L.) Lam.]”
e1“Storage root growth was severely restricted when Mn concentration in fibrous root reached 200 ug/g”
Claim · model-written summary
Foliage dry weight showed a more moderate decrease than storage root growth.
- Taxon
- sweetpotatoIpomoea batatase0
- Outcome
- foliage dry weighte1
- Direction
- decreasee1
- Qualifier
- more moderatee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“sweetpotato [Ipomoea batatas (L.) Lam.]”
e1“while foliage dry weight showed a more moderate decrease”
Claim · model-written summary
Mn concentration was higher in sweetpotato foliage than in fibrous roots.
- Taxon
- sweetpotatoIpomoea batatase0
- Organ / stage
- foliagee1
- Outcome
- Mn concentratione1
- Direction
- highere1
- Comparator
- fibrous rootse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“sweetpotato [Ipomoea batatas (L.) Lam.]”
e1“Mn concentration was higher in the foliage than in fibrous roots”
Claim · model-written summary
Sweetpotato roots showed browning at the higher Mn concentrations (10 or 100 mg/liter) in solution.
- Taxon
- sweetpotatoIpomoea batatase0
- Organ / stage
- Rootse1
- Treatment
- higher (10 or 100 mg/liter) Mn concentrations in solutione1
- Outcome
- browninge1
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“sweetpotato [Ipomoea batatas (L.) Lam.]”
e1“Roots of plants showed browning at higher (10 or 100 mg/liter) Mn concentrations in solution”
Claim · model-written summary
Characteristic Mn toxicity symptoms were observed in plants receiving 2.5, 10 or 100 mg/liter Mn in solution.
- Taxon
- sweetpotatoIpomoea batatase0
- Treatment
- 2.5, (moderate) 10 or 100 mg/liter Mn in solutione1
- Outcome
- Characteristic toxicity symptomse1
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“sweetpotato [Ipomoea batatas (L.) Lam.]”
e1“Characteristic toxicity symptoms were observed in plants receiving 2.5, (moderate) 10 or 100 mg/liter Mn in solution”
Claim · model-written summary
A Mn concentration of approximately 1000 ug/g in whole sweetpotato plants is a critical concentration with respect to Mn toxicity.
- Taxon
- sweetpotatoIpomoea batatase0
- Organ / stage
- whole plantse1
- Outcome
- critical concentrations with respect to Mn toxicitye1
- Value
- approximately 1000 ug/ge1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“sweetpotato [Ipomoea batatas (L.) Lam.]”
e1“a Mn concentration of approximately 1000 ug/g in whole plants and 100 ug/g in fibrous roots are critical concentrations with respect to Mn toxicity”
Claim · model-written summary
A Mn concentration of approximately 100 ug/g in fibrous roots is a critical concentration with respect to Mn toxicity in sweetpotato.
- Taxon
- sweetpotatoIpomoea batatase0
- Organ / stage
- fibrous rootse1
- Outcome
- critical concentrations with respect to Mn toxicitye1
- Value
- 100 ug/ge1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“sweetpotato [Ipomoea batatas (L.) Lam.]”
e1“a Mn concentration of approximately 1000 ug/g in whole plants and 100 ug/g in fibrous roots are critical concentrations with respect to Mn toxicity”
The same questions in other papers
manganese atom · growth · Ipomoea batatas (sweet potato)Positive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- positive
- negative
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.