Abstract
Short term experiments were conducted with vegetative soybean plants (Glycine max L. Merr. ;Ransom' or ;Arksoy') to determine whether sourcesink manipulations, which rapidly changed the ;demand' for sucrose and partitioning of photosynthetically fixed carbon into starch, were associated with alterations in activities of sucrose-P synthase and/or cytoplasmic fructose-1,6-bisphosphatase in leaf extracts. When demand for sucrose from a particular source leaf was increased by defoliation of other source leaves, starch accumulation was restricted and activities of both enzymes were markedly enhanced. When demand for sucrose from source leaves was limited by excision, starch accumulation in the detached leaves was increased while activity of sucrose-P synthase declined sharply. The consistent responsiveness of sucrose-P synthase activity to changes in demand for sucrose supports the contention that regulation of sucrose-P synthase is an integral component of the system which controls sucrose biosynthesis and partitioning of carbon between starch and sucrose biosynthesis in the light.
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 5
Claim · model-written summary
Defoliation restricted starch accumulation in soybean source leaves.
- Taxon
- soybean
Glycine maxe0 - Treatment
- defoliation of other source leavese1
- Outcome
- starch accumulatione1
- Direction
- restrictede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“soybean plants (Glycine max L. Merr.”
e1“When demand for sucrose from a particular source leaf was increased by defoliation of other source leaves, starch accumulation was restricted”
Claim · model-written summary
Defoliation enhanced both sucrose-P synthase and cytoplasmic fructose-1,6-bisphosphatase activities.
- Taxon
- soybeanGlycine maxe0
- Treatment
- defoliation of other source leavese1
- Gene
- sucrose-P synthase and/or cytoplasmic fructose-1,6-bisphosphatasee2
- Outcome
- activities of both enzymese1
- Direction
- markedly enhancede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“soybean plants (Glycine max L. Merr.”
e1“When demand for sucrose from a particular source leaf was increased by defoliation of other source leaves, starch accumulation was restricted and activities of both enzymes were markedly enhanced”
e2“activities of sucrose-P synthase and/or cytoplasmic fructose-1,6-bisphosphatase”
Claim · model-written summary
Excision increased starch accumulation in detached soybean leaves.
- Taxon
- soybeanGlycine maxe0
- Treatment
- excisione1
- Outcome
- starch accumulation in the detached leavese1
- Direction
- increasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“soybean plants (Glycine max L. Merr.”
e1“When demand for sucrose from source leaves was limited by excision, starch accumulation in the detached leaves was increased”
Claim · model-written summary
Excision sharply decreased sucrose-P synthase activity.
- Taxon
- soybeanGlycine maxe0
- Treatment
- excisione1
- Gene
- sucrose-P synthasee1
- Outcome
- activity of sucrose-P synthasee1
- Direction
- declined sharplye1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“soybean plants (Glycine max L. Merr.”
e1“When demand for sucrose from source leaves was limited by excision, starch accumulation in the detached leaves was increased while activity of sucrose-P synthase declined sharply”
Claim · model-written summary
Responsiveness of sucrose-P synthase supports its role in regulating sucrose biosynthesis and carbon partitioning.
- Taxon
- soybeanGlycine maxe0
- Gene
- sucrose-P synthasee1
- Outcome
- sucrose biosynthesis and partitioning of carbon between starch and sucrose biosynthesise1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“soybean plants (Glycine max L. Merr.”
e1“The consistent responsiveness of sucrose-P synthase activity to changes in demand for sucrose supports the contention that regulation of sucrose-P synthase is an integral component of the system which controls sucrose biosynthesis and partitioning of carbon between starch and sucrose biosynthesis in the light”
The same questions in other papers
pruning · physiology: enzyme activity · Glycine max (soybean)Results agree
1 paper in the same direction as this paper
- positive
pruning · quality: sugar starch · Glycine max (soybean)Results agree
2 papers in the same direction as this paper
- negative
- 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.