Abstract
Levels of ferricyanide reduction, cyclic and non-cyclic photophosphorylation were measured in chloroplasts of two cultivars of pea and a comparison of their P/2e+ ratios were made. No differences were observed in cyclic photophosphorylation or ferricyanide reduction but non-cyclic photophosphorylation was lower in chloroplasts from the dwarf than the normal cultivar. Thus the P/2e+ ratio of the dwarf was lower than the normal. Dwarf seedlings treated with gibberellic acid (GA3) had similar rates of cyclic photophosphorylation as the untreated dwarf but non-cyclic photophosphorylation was lower as was ferricyanide reduction. This resulted in P/2e+ ratios that were higher in chloroplasts from the GA3 treated dwarf seedlings than the untreated, and were the same as the untreated normal. Addition of GA3 directly to the chloroplasts did not alter the activity in any way. Hence gibberellins do not directly affect changes in chloroplastic activity but may conceivably be involved in a feed-back control system.
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Claims 10
Claim · model-written summary
Dwarf and normal pea cultivars did not differ in cyclic photophosphorylation.
- Taxon
- pea
Lathyrus oleraceuse1 - Material
- dwarfe2
- Outcome
- cyclic photophosphorylatione0
- Direction
- No differencese0
- Comparator
- normal cultivare2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“No differences were observed in cyclic photophosphorylation or ferricyanide reduction”
e1“two cultivars of pea”
e2“the dwarf than the normal cultivar”
Claim · model-written summary
Dwarf and normal pea cultivars did not differ in ferricyanide reduction.
- Taxon
- peaLathyrus oleraceuse1
- Material
- dwarfe2
- Outcome
- ferricyanide reductione0
- Direction
- No differencese0
- Comparator
- normal cultivare2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“No differences were observed in cyclic photophosphorylation or ferricyanide reduction”
e1“two cultivars of pea”
e2“the dwarf than the normal cultivar”
Claim · model-written summary
Non-cyclic photophosphorylation was lower in dwarf than normal pea chloroplasts.
- Taxon
- peaLathyrus oleraceuse1
- Material
- dwarfe0
- Organ / stage
- chloroplastse0
- Outcome
- non-cyclic photophosphorylatione0
- Direction
- lowere0
- Comparator
- normal cultivare0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“non-cyclic photophosphorylation was lower in chloroplasts from the dwarf than the normal cultivar.”
e1“two cultivars of pea”
Claim · model-written summary
The dwarf pea P/2e+ ratio was lower than normal.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“P/2e+ ratio of the dwarf was lower than the normal.”
e1“two cultivars of pea”
Claim · model-written summary
GA3-treated and untreated dwarf seedlings had similar cyclic photophosphorylation rates.
- Taxon
- peaLathyrus oleraceuse1
- Material
- Dwarf seedlingse0
- Treatment
- gibberellic acid (GA3)e0
- Outcome
- rates of cyclic photophosphorylatione0
- Direction
- similare0
- Comparator
- untreated dwarfe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Dwarf seedlings treated with gibberellic acid (GA3) had similar rates of cyclic photophosphorylation as the untreated dwarf”
e1“two cultivars of pea”
Claim · model-written summary
GA3 treatment lowered non-cyclic photophosphorylation in dwarf seedlings.
- Taxon
- peaLathyrus oleraceuse1
- Material
- Dwarf seedlingse0
- Treatment
- gibberellic acid (GA3)e0
- Outcome
- non-cyclic photophosphorylatione0
- Direction
- lowere0
- Comparator
- untreated dwarfe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Dwarf seedlings treated with gibberellic acid (GA3) had similar rates of cyclic photophosphorylation as the untreated dwarf but non-cyclic photophosphorylation was lower as was ferricyanide reduction.”
e1“two cultivars of pea”
Claim · model-written summary
GA3 treatment lowered ferricyanide reduction in dwarf seedlings.
- Taxon
- peaLathyrus oleraceuse1
- Material
- Dwarf seedlingse0
- Treatment
- gibberellic acid (GA3)e0
- Outcome
- ferricyanide reductione0
- Direction
- lowere0
- Comparator
- untreated dwarfe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Dwarf seedlings treated with gibberellic acid (GA3) had similar rates of cyclic photophosphorylation as the untreated dwarf but non-cyclic photophosphorylation was lower as was ferricyanide reduction.”
e1“two cultivars of pea”
Claim · model-written summary
GA3 treatment raised dwarf chloroplast P/2e+ ratios to the untreated normal level.
- Taxon
- peaLathyrus oleraceuse1
- Material
- dwarf seedlingse0
- Treatment
- GA3e0
- Outcome
- P/2e+ ratiose0
- Direction
- highere0
- Qualifier
- the same as the untreated normale0
- Comparator
- the untreatede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“P/2e+ ratios that were higher in chloroplasts from the GA3 treated dwarf seedlings than the untreated, and were the same as the untreated normal.”
e1“two cultivars of pea”
Claim · model-written summary
Direct addition of GA3 to chloroplasts did not alter activity.
- Taxon
- peaLathyrus oleraceuse1
- Organ / stage
- chloroplastse0
- Treatment
- Addition of GA3 directly to the chloroplastse0
- Outcome
- activitye0
- Direction
- did not altere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Addition of GA3 directly to the chloroplasts did not alter the activity in any way.”
e1“two cultivars of pea”
Claim · model-written summary
The authors suggest gibberellins may participate in feedback control of chloroplast activity.
- Taxon
- peaLathyrus oleraceuse1
- Compound
- gibberellinse0
- Outcome
- chloroplastic activitye0
- Qualifier
- feed-back control systeme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“gibberellins do not directly affect changes in chloroplastic activity but may conceivably be involved in a feed-back control system.”
e1“two cultivars of pea”
The same questions in other papers
gibberellin A3 · molecular: metabolites · Lathyrus oleraceus (pea)Results agree
1 paper in the same direction as this paper
- no effect
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.