Abstract
Photoperiod not only controls the timing of flowering, but also affects later stages of seed development. To study its effect on assimilate partitioning, soybean plants were kept in short days (SD) or night interrupted (NI) during seed filling. The source-sink ratio was fixed to one leaflet-one pod per node. The node was girdle-isolated and its leaflet was pulse labelled with /sup 14/CO/sub 2/. SD plants partitioned more /sup 14/C into seeds, while NI plants showed higher proportions in the petiole, stem and carpel. Seed growth rate and final seed dry weight were increased by 40% in SD. The sugar/starch ratio was increased in cotyledons and decreased in leaves of SD plants. In contrast, NI plants showed more /sup 14/C incorporation into proteins. No changes were detected in carbon exchange ratio, dark respiration and total node dry weight. Thus, photoperiodic induced changes in carbohydrate and protein partitioning occurred without changes in the overall assimilatory process.
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 8
Claim · model-written summary
Short days increased labeled carbon partitioning into seeds.
- Taxon
- soybean
Glycine maxe1 - Treatment
- short days (SD)e1
- Outcome
- /sup 14/C into seedse0
- Direction
- moree0
- Comparator
- night interrupted (NI)e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“SD plants partitioned more /sup 14/C into seeds”
e1“soybean plants were kept in short days (SD) or night interrupted (NI) during seed filling”
Claim · model-written summary
Night interruption increased labeled carbon proportions in petiole, stem and carpel.
- Taxon
- soybeanGlycine maxe1
- Treatment
- night interrupted (NI)e1
- Outcome
- proportions in the petiole, stem and carpele0
- Direction
- highere0
- Comparator
- short days (SD)e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“NI plants showed higher proportions in the petiole, stem and carpel”
e1“soybean plants were kept in short days (SD) or night interrupted (NI) during seed filling”
Claim · model-written summary
Short days increased seed growth rate by 40%.
- Taxon
- soybeanGlycine maxe1
- Treatment
- short days (SD)e1
- Outcome
- Seed growth ratee0
- Direction
- increasede0
- Value
- 40%e0
- Comparator
- night interrupted (NI)e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seed growth rate and final seed dry weight were increased by 40% in SD”
e1“soybean plants were kept in short days (SD) or night interrupted (NI) during seed filling”
Claim · model-written summary
Short days increased final seed dry weight by 40%.
- Taxon
- soybeanGlycine maxe1
- Treatment
- short days (SD)e1
- Outcome
- final seed dry weighte0
- Direction
- increasede0
- Value
- 40%e0
- Comparator
- night interrupted (NI)e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seed growth rate and final seed dry weight were increased by 40% in SD”
e1“soybean plants were kept in short days (SD) or night interrupted (NI) during seed filling”
Claim · model-written summary
Short days increased cotyledon sugar to starch ratio.
- Taxon
- soybeanGlycine maxe1
- Organ / stage
- cotyledonse0
- Treatment
- short days (SD)e1
- Outcome
- sugar/starch ratioe0
- Direction
- increasede0
- Comparator
- night interrupted (NI)e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The sugar/starch ratio was increased in cotyledons and decreased in leaves of SD plants”
e1“soybean plants were kept in short days (SD) or night interrupted (NI) during seed filling”
Claim · model-written summary
Short days decreased leaf sugar to starch ratio.
- Taxon
- soybeanGlycine maxe1
- Organ / stage
- leavese0
- Treatment
- short days (SD)e1
- Outcome
- sugar/starch ratioe0
- Direction
- decreasede0
- Comparator
- night interrupted (NI)e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The sugar/starch ratio was increased in cotyledons and decreased in leaves of SD plants”
e1“soybean plants were kept in short days (SD) or night interrupted (NI) during seed filling”
Claim · model-written summary
Night interruption increased labeled carbon incorporation into proteins.
- Taxon
- soybeanGlycine maxe1
- Treatment
- night interrupted (NI)e1
- Outcome
- /sup 14/C incorporation into proteinse0
- Direction
- moree0
- Comparator
- short days (SD)e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“NI plants showed more /sup 14/C incorporation into proteins”
e1“soybean plants were kept in short days (SD) or night interrupted (NI) during seed filling”
Claim · model-written summary
Carbon exchange ratio, dark respiration, and total node dry weight did not change.
- Taxon
- soybeanGlycine maxe1
- Treatment
- short days (SD)e1
- Outcome
- carbon exchange ratio, dark respiration and total node dry weighte0
- Direction
- No changese0
- Comparator
- night interrupted (NI)e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“No changes were detected in carbon exchange ratio, dark respiration and total node dry weight”
e1“soybean plants were kept in short days (SD) or night interrupted (NI) during seed filling”
The same questions in other papers
light · physiology: respiration · Glycine max (soybean)Positive and negative results
2 papers in the same direction as this paper · 1 in the opposite direction
- positive
- 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.