Abstract
The effects of different concentrations of manganous sulphate on root growth,cell division, chromosome and nucleus morphplogy and nucleoli in root tip-cells of Allium cepa L. were studied. The concentrations of manganous sulphate used were 10-7,10-6,10-5 ,10-4,10-3, 10-2 and 10-1mol/L. The results indicated that manganese had a stimulatory effect on the root growth at lower concentrations (10-7 to 10-4mol/L). With increasing the concentration of Mn (10-3 to 10-1mol/L) and duration of treatment,manganese inhibited root growth and cell division, and had toxic effects on chromosomes,nuclei and nucleoli. Manganese Could induce mitotic irregularities,comprising c-mitosis,anaphase bridges and chromosome stickiness. The nuclei became irregular in shape and many micronuclei were scattered in the cytoplasm. Some similar silver-stained particulate materials were found scattered in the nucleus in root tip cells. The possible mechanism behind these phenomena is also briefly discussed.
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Claims 7
Claim · model-written summary
Low manganese concentrations stimulated root growth.
- Taxon
- Allium cepa
Allium cepat0 - Treatment
- manganesee0
- Outcome
- root growthe0
- Direction
- stimulatorye0
- Value
- 10-7 to 10-4mol/Le0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Allium cepa”
e0“manganese had a stimulatory effect on the root growth at lower concentrations (10-7 to 10-4mol/L)”
Claim · model-written summary
Higher manganese concentrations inhibited root growth.
- Taxon
- Allium cepaAllium cepat0
- Treatment
- manganesee0
- Outcome
- root growthe0
- Direction
- inhibitede0
- Value
- 10-3 to 10-1mol/Le0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Allium cepa”
e0“With increasing the concentration of Mn (10-3 to 10-1mol/L) and duration of treatment,manganese inhibited root growth and cell division”
Claim · model-written summary
Higher manganese concentrations inhibited cell division.
- Taxon
- Allium cepaAllium cepat0
- Treatment
- manganesee0
- Outcome
- cell divisione0
- Direction
- inhibitede0
- Value
- 10-3 to 10-1mol/Le0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Allium cepa”
e0“With increasing the concentration of Mn (10-3 to 10-1mol/L) and duration of treatment,manganese inhibited root growth and cell division”
Claim · model-written summary
Manganese damaged chromosomes, nuclei and nucleoli.
- Taxon
- Allium cepaAllium cepat0
- Treatment
- manganesee0
- Outcome
- toxic effects on chromosomes,nuclei and nucleolie0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Allium cepa”
e0“manganese inhibited root growth and cell division, and had toxic effects on chromosomes,nuclei and nucleoli”
Claim · model-written summary
Manganese induced c-mitosis, anaphase bridges and chromosome stickiness.
- Taxon
- Allium cepaAllium cepat0
- Treatment
- Manganesee0
- Outcome
- c-mitosis,anaphase bridges and chromosome stickinesse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Allium cepa”
e0“Manganese Could induce mitotic irregularities,comprising c-mitosis,anaphase bridges and chromosome stickiness”
Claim · model-written summary
Nuclei became irregular and micronuclei appeared in the cytoplasm.
- Taxon
- Allium cepaAllium cepat0
- Outcome
- nuclei became irregular in shape and many micronuclei were scattered in the cytoplasme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Allium cepa”
e0“The nuclei became irregular in shape and many micronuclei were scattered in the cytoplasm”
Claim · model-written summary
Silver-stained particulate material appeared in root-tip nuclei.
- Taxon
- Allium cepaAllium cepat0
- Organ / stage
- root tip cellse0
- Outcome
- silver-stained particulate materialse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Allium cepa”
e0“Some similar silver-stained particulate materials were found scattered in the nucleus in root tip cells”
The same questions in other papers
manganese atom · cytology · Allium cepa (onion)Results agree
1 paper in the same direction as this paper
- negative
manganese atom · growth · Allium cepa (onion)Results agree
1 paper in the same direction as this paper
- positive
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.