Abstract
Why benzyladenine (BA) retards chlorophyll degradation of rice leaf segments, but does not prevent it was investigated. When BA solutions bathing segments of rice leaves were replaced daily, the effect of BA was not enhanced. Solutions of BA kept at 27°C in the dark for 4 days were as active as fresh solutions. It seems unlikely, therefore, that the decrease in the chlorophyll content with increased incubation time in BA-treated leaf segments is caused by inactivation of BA either in the leaves or in solution. Of 25 L-amino acids at 50 mM added singly with BA, 19 were antagonistic to the effect of BA on chlorophyll content, but four, L-arginine, L-histidine, L-lysine and L-methionine, significantly enhanced the effect of BA. The effects of amino acids decreased with a decrease in the amino acid concentration or an increase in BA concentration. When concentrations were decreased to 5 mM, only L-lysine slightly increased the chlorophyll content in BA-treated leaf segments. L-Proline and L-tryptophan did not modify the effect of BA on chlorophyll content. Effects of amino acids on chlorophyll content in leaf segments without BA treatment are similar to those with BA. Furthermore, cycloheximide (50 μg/ml), which decreased the soluble amino acid content, increased the chlorophyll content in BA-treated leaf segments. Since an accumulation of soluble amino acids precedes the degradation of chlorphyll in BA-treated leaf segments, probably antagonisms caused by the amino acids accumulated in the tissue, prevent the added BA from being fully effective in stopping chlorophyll loss.
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Claims 16
Claim · model-written summary
Daily replacement of benzyladenine did not enhance its effect.
- Taxon
- rice
Oryza sativae0 - Treatment
- BA solutionse0
- Outcome
- effect of BAe0
- Direction
- not enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When BA solutions bathing segments of rice leaves were replaced daily, the effect of BA was not enhanced.”
Claim · model-written summary
Stored benzyladenine solutions were as active as fresh solutions.
- Taxon
- riceOryza sativat0
- Treatment
- Solutions of BA kept at 27°C in the dark for 4 dayse0
- Outcome
- activee0
- Direction
- as active ase0
- Comparator
- fresh solutionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Solutions of BA kept at 27°C in the dark for 4 days were as active as fresh solutions.”
t0“rice”
Claim · model-written summary
Nineteen of 25 amino acids antagonized benzyladenine effects on chlorophyll.
- Taxon
- riceOryza sativat0
- Treatment
- L-amino acids at 50 mM added singly with BAe0
- Outcome
- chlorophyll contente0
- Direction
- antagonistice0
- Value
- 19e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Of 25 L-amino acids at 50 mM added singly with BA, 19 were antagonistic to the effect of BA on chlorophyll content”
t0“rice”
Claim · model-written summary
L-arginine significantly enhanced the benzyladenine effect.
- Taxon
- riceOryza sativat0
- Treatment
- L-argininee0
- Outcome
- effect of BAe0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“four, L-arginine, L-histidine, L-lysine and L-methionine, significantly enhanced the effect of BA”
t0“rice”
Claim · model-written summary
L-histidine significantly enhanced the benzyladenine effect.
- Taxon
- riceOryza sativat0
- Treatment
- L-histidinee0
- Outcome
- effect of BAe0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“four, L-arginine, L-histidine, L-lysine and L-methionine, significantly enhanced the effect of BA”
t0“rice”
Claim · model-written summary
L-lysine significantly enhanced the benzyladenine effect.
- Taxon
- riceOryza sativat0
- Treatment
- L-lysinee0
- Outcome
- effect of BAe0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“four, L-arginine, L-histidine, L-lysine and L-methionine, significantly enhanced the effect of BA”
t0“rice”
Claim · model-written summary
L-methionine significantly enhanced the benzyladenine effect.
- Taxon
- riceOryza sativat0
- Treatment
- L-methioninee0
- Outcome
- effect of BAe0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“four, L-arginine, L-histidine, L-lysine and L-methionine, significantly enhanced the effect of BA”
t0“rice”
Claim · model-written summary
Amino acid effects declined with lower amino acid concentration or higher benzyladenine concentration.
- Taxon
- riceOryza sativat0
- Treatment
- amino acid concentratione0
- Outcome
- effects of amino acidse0
- Direction
- decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effects of amino acids decreased with a decrease in the amino acid concentration or an increase in BA concentration.”
t0“rice”
Claim · model-written summary
At 5 mM, only L-lysine slightly increased chlorophyll content with benzyladenine.
- Taxon
- riceOryza sativat0
- Treatment
- L-lysinee0
- Outcome
- chlorophyll contente0
- Direction
- increasede0
- Value
- 5 mMe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When concentrations were decreased to 5 mM, only L-lysine slightly increased the chlorophyll content in BA-treated leaf segments.”
t0“rice”
Claim · model-written summary
L-Proline did not modify the benzyladenine effect.
- Taxon
- riceOryza sativat0
- Treatment
- L-Prolinee0
- Outcome
- effect of BA on chlorophyll contente0
- Direction
- did not modifye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“L-Proline and L-tryptophan did not modify the effect of BA on chlorophyll content.”
t0“rice”
Claim · model-written summary
L-tryptophan did not modify the benzyladenine effect.
- Taxon
- riceOryza sativat0
- Treatment
- L-tryptophane0
- Outcome
- effect of BA on chlorophyll contente0
- Direction
- did not modifye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“L-Proline and L-tryptophan did not modify the effect of BA on chlorophyll content.”
t0“rice”
Claim · model-written summary
Amino acid effects without benzyladenine resembled those with it.
- Taxon
- riceOryza sativat0
- Outcome
- Effects of amino acids on chlorophyll contente0
- Comparator
- those with BAe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Effects of amino acids on chlorophyll content in leaf segments without BA treatment are similar to those with BA.”
t0“rice”
Claim · model-written summary
Cycloheximide reduced soluble amino acid content.
- Taxon
- riceOryza sativat0
- Treatment
- cycloheximide (50 μg/ml)e0
- Outcome
- soluble amino acid contente0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cycloheximide (50 μg/ml), which decreased the soluble amino acid content”
t0“rice”
Claim · model-written summary
Cycloheximide increased chlorophyll content in benzyladenine-treated segments.
- Taxon
- riceOryza sativat0
- Treatment
- cycloheximide (50 μg/ml)e0
- Outcome
- chlorophyll contente0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cycloheximide (50 μg/ml), which decreased the soluble amino acid content, increased the chlorophyll content in BA-treated leaf segments.”
t0“rice”
Claim · model-written summary
Soluble amino acid accumulation preceded chlorophyll degradation.
- Taxon
- riceOryza sativat0
- Outcome
- accumulation of soluble amino acids precedes the degradation of chlorphylle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“an accumulation of soluble amino acids precedes the degradation of chlorphyll in BA-treated leaf segments”
t0“rice”
Claim · model-written summary
Authors propose accumulated amino acids antagonize benzyladenine and limit chlorophyll retention.
- Taxon
- riceOryza sativat0
- Outcome
- stopping chlorophyll losse0
- Qualifier
- antagonisms caused by the amino acids accumulated in the tissuee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“probably antagonisms caused by the amino acids accumulated in the tissue, prevent the added BA from being fully effective in stopping chlorophyll loss.”
t0“rice”
The same questions in other papers
N-benzyladenine · molecular: metabolites · Oryza sativa (rice)Positive and negative results
1 paper in the same direction as this paper · 2 in the opposite direction
- positive
- positive
- no effect
N-benzyladenine · physiology: pigments · Oryza sativa (rice)Positive and negative results
1 paper in the same direction as this paper · 6 in the opposite direction
- positive
- positive
- positive
4 papers more in this group
See all 8 papers →L-lysine · molecular: metabolites · Oryza sativa (rice)Results agree
1 paper in the same direction as this paper
- positive
L-alpha-amino acid · physiology: pigments · Oryza sativa (rice)Results agree
1 paper in the same direction as this paper
- negative
L-lysine · physiology: pigments · Oryza sativa (rice)Results agree
1 paper in the same direction as this paper
- positive
L-proline · physiology: pigments · Oryza sativa (rice)Results agree
1 paper in the same direction as this paper
- no effect
L-tryptophan · physiology: pigments · Oryza sativa (rice)Results agree
1 paper in the same direction as this paper
- no effect
cycloheximide · physiology: pigments · Oryza sativa (rice)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.