Abstract
SUMMARY Applications of 5 × 10 ‐4 m Zn(II) and 3 × 10 ‐5 m Cd(II) depressed but did not block root growth in Allium cepa L. Both heavy metals were indirect clastogens at these moderate concentrations, for they induced the appearance of chromosomal bridges, but no breaks were detected in the first anatelophases. On the other hand, Zn and Cd respectively potentiated six and eleven times the direct clastogenic effect of the β‐irradiation produced by [ 3 H]thymidine incorporation into DNA. The chromosomal breaks at mitosis were more abundant when [ 3 H] was incorporated into early replicating DNA. On the other hand, when the incorporation took place in the last half of interphase, the subsequent G 2 as well as the prophase were extended (1·7‐fold for Zn and 2·7‐fold for Cd), and the Sexcess lesions were repaired before anaphase. The whole cycle experienced 1·5 and 2·0‐fold increases in the presence of Zn and Cd in relation to that in control meristems (15 h).
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
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 11
Claim · model-written summary
Zinc depressed but did not block root growth.
- Taxon
- Allium cepa L.
Allium cepae0 - Treatment
- 5 × 10 ‐4 m Zn(II)e0
- Outcome
- root growthe0
- Direction
- depressede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Applications of 5 × 10 ‐4 m Zn(II) and 3 × 10 ‐5 m Cd(II) depressed but did not block root growth in Allium cepa L.”
Claim · model-written summary
Cadmium depressed but did not block root growth.
- Taxon
- Allium cepa L.Allium cepae0
- Treatment
- 3 × 10 ‐5 m Cd(II)e0
- Outcome
- root growthe0
- Direction
- depressede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Applications of 5 × 10 ‐4 m Zn(II) and 3 × 10 ‐5 m Cd(II) depressed but did not block root growth in Allium cepa L.”
Claim · model-written summary
Both metals induced chromosome bridges without detectable first-anatelophase breaks.
- Taxon
- Allium cepaAllium cepat0
- Treatment
- Both heavy metalse0
- Outcome
- chromosomal bridgese0
- Qualifier
- no breaks were detected in the first anatelophasese0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both heavy metals were indirect clastogens at these moderate concentrations, for they induced the appearance of chromosomal bridges, but no breaks were detected in the first anatelophases.”
t0“Allium cepa”
Claim · model-written summary
Zinc potentiated irradiation clastogenicity six times.
- Taxon
- Allium cepaAllium cepat0
- Treatment
- Zne0
- Outcome
- direct clastogenic effecte0
- Direction
- potentiatede0
- Value
- sixe0
- Comparator
- β‐irradiatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Zn and Cd respectively potentiated six and eleven times the direct clastogenic effect of the β‐irradiation produced by [ 3 H]thymidine incorporation into DNA.”
t0“Allium cepa”
Claim · model-written summary
Cadmium potentiated irradiation clastogenicity eleven times.
- Taxon
- Allium cepaAllium cepat0
- Treatment
- Cde0
- Outcome
- direct clastogenic effecte0
- Direction
- potentiatede0
- Value
- elevene0
- Comparator
- β‐irradiatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Zn and Cd respectively potentiated six and eleven times the direct clastogenic effect of the β‐irradiation produced by [ 3 H]thymidine incorporation into DNA.”
t0“Allium cepa”
Claim · model-written summary
Early replicating DNA incorporation had more mitotic chromosome breaks.
- Taxon
- Allium cepaAllium cepat0
- Treatment
- [ 3 H] was incorporated into early replicating DNAe0
- Outcome
- chromosomal breaks at mitosise0
- Direction
- more abundante0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The chromosomal breaks at mitosis were more abundant when [ 3 H] was incorporated into early replicating DNA.”
t0“Allium cepa”
Claim · model-written summary
Late interphase incorporation extended G2 and prophase 1.7-fold with zinc.
- Taxon
- Allium cepaAllium cepat0
- Treatment
- Zne0
- Outcome
- G 2 as well as the prophasee0
- Direction
- extendede0
- Value
- 1·7‐folde0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the subsequent G 2 as well as the prophase were extended (1·7‐fold for Zn and 2·7‐fold for Cd)”
t0“Allium cepa”
Claim · model-written summary
Late interphase incorporation extended G2 and prophase 2.7-fold with cadmium.
- Taxon
- Allium cepaAllium cepat0
- Treatment
- Cde0
- Outcome
- G 2 as well as the prophasee0
- Direction
- extendede0
- Value
- 2·7‐folde0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the subsequent G 2 as well as the prophase were extended (1·7‐fold for Zn and 2·7‐fold for Cd)”
t0“Allium cepa”
Claim · model-written summary
Late incorporation allowed lesions to be repaired before anaphase.
- Taxon
- Allium cepaAllium cepat0
- Outcome
- Sexcess lesions were repaired before anaphasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the Sexcess lesions were repaired before anaphase.”
t0“Allium cepa”
Claim · model-written summary
Zinc lengthened the cell cycle 1.5-fold.
- Taxon
- Allium cepaAllium cepat0
- Treatment
- Zne0
- Outcome
- whole cyclee0
- Direction
- increasese0
- Value
- 1·5e0
- Comparator
- control meristemse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The whole cycle experienced 1·5 and 2·0‐fold increases in the presence of Zn and Cd in relation to that in control meristems (15 h).”
t0“Allium cepa”
Claim · model-written summary
Cadmium lengthened the cell cycle 2.0-fold.
- Taxon
- Allium cepaAllium cepat0
- Treatment
- Cde0
- Outcome
- whole cyclee0
- Direction
- increasese0
- Value
- 2·0‐folde0
- Comparator
- control meristemse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The whole cycle experienced 1·5 and 2·0‐fold increases in the presence of Zn and Cd in relation to that in control meristems (15 h).”
t0“Allium cepa”
The same questions in other papers
zinc atom · growth · Allium cepa (onion)Results differ
2 papers in the same direction as this paper · 22 in the opposite direction
- positive
- positive
- positive
21 papers more in this group
See all 25 papers →cadmium atom · growth · Allium cepa (onion)Results agree
6 papers in the same direction as this paper
- negative
- negative
- negative
3 papers more in this group
See all 7 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.