Abstract
SummaryThe fatal effects of PMOH and PMN at near 10−5 M on enlarging cells of onion root tips were successfully antagonized in an hour's exposure with cysteine and glutathione at around 10−4 M and by extracts of yeast (0.5-1%) and of beef spleen (0.5%). Gross reactions provided a delicate indicator for estimating the efficiency of the antagonists and showed a reduction in toxicity of 50% to 95%. Cysteine and glutathione at 0.01% also protected roots against PMN 0.2 ppm for 3 days continuously. Effective concentrations of all antagonists by themselves caused some growth arrest. The enzymic systems involved and the possible mechanism of antagonism are discussed.
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Claims 7
Claim · model-written summary
Cysteine antagonized fatal effects of PMOH and PMN on onion root-tip cells.
- Taxon
- Onion
Allium cepat0 - Organ / stage
- root tipse0
- Treatment
- cysteinee0
- Outcome
- fatal effectse0
- Direction
- antagonizede0
- Comparator
- PMOH and PMNe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The fatal effects of PMOH and PMN at near 10−5 M on enlarging cells of onion root tips were successfully antagonized in an hour's exposure with cysteine and glutathione at around 10−4 M”
t0“Onion”
Claim · model-written summary
Glutathione antagonized fatal effects of PMOH and PMN on onion root-tip cells.
- Taxon
- OnionAllium cepat0
- Organ / stage
- root tipse0
- Treatment
- glutathionee0
- Outcome
- fatal effectse0
- Direction
- antagonizede0
- Comparator
- PMOH and PMNe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The fatal effects of PMOH and PMN at near 10−5 M on enlarging cells of onion root tips were successfully antagonized in an hour's exposure with cysteine and glutathione at around 10−4 M”
t0“Onion”
Claim · model-written summary
Yeast extract antagonized mercurial toxicity.
- Taxon
- OnionAllium cepat0
- Treatment
- extracts of yeast (0.5-1%)e0
- Outcome
- toxicitye0
- Direction
- reductione0
- Value
- 50% to 95%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“by extracts of yeast (0.5-1%) and of beef spleen (0.5%). Gross reactions provided a delicate indicator for estimating the efficiency of the antagonists and showed a reduction in toxicity of 50% to 95%.”
t0“Onion”
Claim · model-written summary
Beef spleen extract antagonized mercurial toxicity.
- Taxon
- OnionAllium cepat0
- Treatment
- beef spleen (0.5%)e0
- Outcome
- toxicitye0
- Direction
- reductione0
- Value
- 50% to 95%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“by extracts of yeast (0.5-1%) and of beef spleen (0.5%). Gross reactions provided a delicate indicator for estimating the efficiency of the antagonists and showed a reduction in toxicity of 50% to 95%.”
t0“Onion”
Claim · model-written summary
Cysteine protected roots against PMN for three days.
- Taxon
- OnionAllium cepat0
- Treatment
- Cysteinee0
- Outcome
- protected rootse0
- Comparator
- PMN 0.2 ppme0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cysteine and glutathione at 0.01% also protected roots against PMN 0.2 ppm for 3 days continuously.”
t0“Onion”
Claim · model-written summary
Glutathione protected roots against PMN for three days.
- Taxon
- OnionAllium cepat0
- Treatment
- glutathionee0
- Outcome
- protected rootse0
- Comparator
- PMN 0.2 ppme0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cysteine and glutathione at 0.01% also protected roots against PMN 0.2 ppm for 3 days continuously.”
t0“Onion”
Claim · model-written summary
Effective concentrations of the antagonists alone caused some growth arrest.
- Taxon
- OnionAllium cepat0
- Treatment
- all antagonistse0
- Outcome
- growth arreste0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Effective concentrations of all antagonists by themselves caused some growth arrest.”
t0“Onion”
The same questions in other papers
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See all 7 papers →botanical · pest · Allium cepa (onion)Positive and negative results
8 papers in the same direction as this paper · 3 in the opposite direction
- negative
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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.