Paper · 1975 · Crop Science

Manganese Toxicity Effects on Leaf Cell Multiplication and Expansion and on Dry Matter Yield of Sugar Beets1

N. Terry; P. S. Evans; D. E. Thomas

4
claims
10
verbatim quotes
20
citations
2
research areas
—
Not open access

Abstract

Sugar beet ( Beta vulgaris ‘F58‐554HI’) plants were cultured hydroponically (pH 6.0) for 3 weeks in a greenhouse with 10 concentrations of Mn in culture solutions; 0.44, 4, 8, 16, 32, 64, 128, 256, 550, and 1,000 mg Mn/liter. Dry weights of roots and leaves, numbers of cells, and mean call volume/leaf were unchanged with increases in Mn from 0.44 to 16 mg/liter in the culture solution or with tissue Mn up to about 5,000 mg/kg dry matter. With further increase to 30 or 40 mg Mn/liter in the culture solution dry matter yields were diminished by 50%, with tissue Mn concentrations of about 20,000 mg/kg. Manganese toxicity reduced the numbers of cells/leaf and the average leaf cell volume and produced smaller leaf and root dry weights.

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The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.

Claims 4

Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

Dry weights, cell numbers and mean leaf cell volume were unchanged as Mn rose from 0.44 to 16 mg/liter in solution or tissue Mn reached about 5,000 mg/kg.

Treatment
increases in Mn from 0.44 to 16 mg/liter in the culture solutione1
Outcome
Dry weights of roots and leaves, numbers of cells, and mean call volume/leafe1
Direction
unchangede1
Qualifier
tissue Mn up to about 5,000 mg/kg dry mattere1
Setting
greenhousee2

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Beta vulgaris subsp. vulgaris
Beta vulgaris subsp. vulgaris · TaxonQuadell · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“Sugar beet ( Beta vulgaris”

✓ located verbatim in the source · abstract, characters 0–26 · show in text ↑
e2

“plants were cultured hydroponically (pH 6.0) for 3 weeks in a greenhouse”

✓ located verbatim in the source · abstract, characters 40–112 · show in text ↑
e1

“Dry weights of roots and leaves, numbers of cells, and mean call volume/leaf were unchanged with increases in Mn from 0.44 to 16 mg/liter in the culture solution or with tissue Mn up to about 5,000 mg/kg dry matter”

✓ located verbatim in the source · abstract, characters 226–440 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Dry matter yield was reduced by 50% at 30 or 40 mg Mn/liter in solution, with tissue Mn about 20,000 mg/kg.

Treatment
30 or 40 mg Mn/liter in the culture solutione3
Outcome
dry matter yieldse3
Direction
diminishede3
Value
50%e3
Qualifier
tissue Mn concentrations of about 20,000 mg/kge3
Setting
greenhousee2

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Beta vulgaris subsp. vulgaris
Beta vulgaris subsp. vulgaris · TaxonQuadell · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“Sugar beet ( Beta vulgaris”

✓ located verbatim in the source · abstract, characters 0–26 · show in text ↑
e2

“plants were cultured hydroponically (pH 6.0) for 3 weeks in a greenhouse”

✓ located verbatim in the source · abstract, characters 40–112 · show in text ↑
e3

“With further increase to 30 or 40 mg Mn/liter in the culture solution dry matter yields were diminished by 50%, with tissue Mn concentrations of about 20,000 mg/kg”

✓ located verbatim in the source · abstract, characters 442–605 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Manganese toxicity reduced the number of cells per leaf and the average leaf cell volume.

Treatment
Manganese toxicitye4
Outcome
numbers of cells/leaf and the average leaf cell volumee4
Direction
reducede4

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Beta vulgaris subsp. vulgaris
Beta vulgaris subsp. vulgaris · TaxonQuadell · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“Sugar beet ( Beta vulgaris”

✓ located verbatim in the source · abstract, characters 0–26 · show in text ↑
e4

“Manganese toxicity reduced the numbers of cells/leaf and the average leaf cell volume and produced smaller leaf and root dry weights”

✓ located verbatim in the source · abstract, characters 607–739 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Manganese toxicity produced smaller leaf and root dry weights.

Treatment
Manganese toxicitye4
Outcome
leaf and root dry weightse4
Direction
smallere4

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Beta vulgaris subsp. vulgaris
Beta vulgaris subsp. vulgaris · TaxonQuadell · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“Sugar beet ( Beta vulgaris”

✓ located verbatim in the source · abstract, characters 0–26 · show in text ↑
e4

“Manganese toxicity reduced the numbers of cells/leaf and the average leaf cell volume and produced smaller leaf and root dry weights”

✓ located verbatim in the source · abstract, characters 607–739 · show in text ↑

manganese atom · growth · Beta vulgaris (beet)Positive and negative results

6 papers: 5 positive, 1 negative or no effect

5 in the opposite direction

  1. positive
  2. positive
  3. positive

2 papers more in this group

See all 6 papers →

manganese atom · yield · Beta vulgaris (beet)Positive and negative results

13 papers: 10 positive, 3 negative or no effect

2 papers in the same direction as this paper · 10 in the opposite direction

  1. positive
  2. positive
  3. positive

9 papers more in this group

See all 13 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.