Abstract
Solar radiation is an important environmental factor influencing seed yield in soybean [ Glycine max (L). Merr.]. Our objective was to analyze the response of soybean seed yield components to light enrichment initiated at different growth stages. Light enrichment was imposed on the indeterminate soybean cultivars Altona and Evans by installing wire mesh fencing on either side of the center row to push the adjacent rows aside at different growth stages. Fences prevented plants in the neighboring rows from encroaching on the growing space of the center row plants. Pod number per plant and to a lesser extent seed size accounted for variation in seed yield. Light enrichment initiated at late vegetative or early flowering stages increased seed yield 144 to 252%, mainly by increasing pod number, while light enrichment beginning at early pod formation increased seed size 8 to 23%, resulting in a 32 to 115% increase in seed yield. Responses to light enrichment occurred proportionately across all node positions despite the differences in the time (15–20 d) of development of yield components at the different node positions. Although maximum seed size may be under genetic control in soybean plants, our results suggested seed size can still be modified by the environment with some internal control moderating the final size of most seeds in all pods. It indicates that plants are able to redistribute the available resources to components not yet determined, in an attempt to maintain or improve yield.
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Claims 8
Claim · model-written summary
Pod number and seed size accounted for variation in soybean seed yield.
- Taxon
- Soybean
Glycine maxt0 - Organ / stage
- Pode0
- Outcome
- variation in seed yielde0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean”
e0“Pod number per plant and to a lesser extent seed size accounted for variation in seed yield”
Claim · model-written summary
Light enrichment beginning at late vegetative or early flowering stages raised seed yield by 144 to 252%.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- Light enrichment initiated at late vegetative or early flowering stagese0
- Outcome
- seed yielde0
- Direction
- increasede0
- Value
- 144 to 252%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean”
e0“Light enrichment initiated at late vegetative or early flowering stages increased seed yield 144 to 252%”
Claim · model-written summary
The early light enrichment yield gain was mainly due to greater pod number.
- Taxon
- SoybeanGlycine maxt0
- Organ / stage
- pode0
- Outcome
- pod numbere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean”
e0“mainly by increasing pod number”
Claim · model-written summary
Light enrichment at early pod formation increased seed size by 8 to 23%.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- light enrichment beginning at early pod formatione0
- Outcome
- seed sizee0
- Direction
- increasede0
- Value
- 8 to 23%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean”
e0“light enrichment beginning at early pod formation increased seed size 8 to 23%”
Claim · model-written summary
Light enrichment at early pod formation increased seed yield by 32 to 115%.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- light enrichment beginning at early pod formatione0
- Outcome
- seed yielde0
- Direction
- increasee0
- Value
- 32 to 115%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean”
e0“light enrichment beginning at early pod formation increased seed size 8 to 23%, resulting in a 32 to 115% increase in seed yield”
Claim · model-written summary
Responses to enrichment occurred proportionately across node positions.
- Taxon
- SoybeanGlycine maxt0
- Organ / stage
- node positionse0
- Outcome
- Responses to light enrichmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean”
e0“Responses to light enrichment occurred proportionately across all node positions”
Claim · model-written summary
Seed size remained environmentally modifiable under apparent internal control.
- Taxon
- SoybeanGlycine maxt0
- Outcome
- seed sizee0
- Qualifier
- some internal controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean”
e0“seed size can still be modified by the environment with some internal control moderating the final size of most seeds in all pods”
Claim · model-written summary
Plants appear able to redistribute available resources to undetermined components to maintain or improve yield.
- Taxon
- SoybeanGlycine maxt0
- Outcome
- yielde0
- Qualifier
- redistribute the available resourcese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean”
e0“plants are able to redistribute the available resources to components not yet determined, in an attempt to maintain or improve yield”
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See all 121 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.