Abstract
Abstract The rate of accumulation of dry weight in the seed is one important process in yield production by grain crops. Information on factors influencing the seed growth rate are needed to help identify yield limiting processes. This study was undertaken to determine the effect of varying source‐sink ratios on the rate of dry matter accumulation in seed of soybeans ( Glycine max (L.) Merr.). The varying source‐sink ratios were obtained by removing approximately 50% of the pods or 66% of the leaf area (two leaflets from each trifoliolate leaf) at the end of the flowering period. The study was conducted for 2 years in the field. The pod removal treatment reduced pod number by 20% at maturity and resulted in an increase in weight/seed over the control near the end of the filling period in one of the years. Removal of two‐thirds of the leaf area reduced the weight per seed near the end of the filling period in both years of study. Pod weights of the pod removal treatments were generally heavier than the control and the pods from the leaf removal treatments were lighter than the control. Defoliation lowered the concentration of sugar in the stem sap compared with the control; but, pod removal increased the concentration of stem sugars only near the end of the filling period. The data are interpreted as suggesting that seed growth rates are not closely related to photosynthate production and that storage carbohydrates serve as a buffer between seed growth and photosynthate production.
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Claims 9
Claim · model-written summary
Removing about half the pods reduced pod number at maturity by 20%.
- Taxon
- soybeans
Glycine maxe1 - Treatment
- pod removal treatmente0
- Outcome
- pod numbere0
- Direction
- reducede0
- Value
- 20%e0
- Qualifier
- at maturitye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The pod removal treatment reduced pod number by 20% at maturity”
e1“seed of soybeans ( Glycine max (L.) Merr.)”
e2“approximately 50% of the pods”
Claim · model-written summary
Pod removal increased seed weight over control late in filling in one year.
- Taxon
- soybeansGlycine maxe2
- Treatment
- pod removal treatmente1
- Outcome
- weight/seede0
- Direction
- increasee0
- Qualifier
- near the end of the filling period in one of the yearse0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“resulted in an increase in weight/seed over the control near the end of the filling period in one of the years”
e1“The pod removal treatment reduced pod number”
e2“seed of soybeans ( Glycine max (L.) Merr.)”
Claim · model-written summary
Removing two thirds of leaf area reduced soybean seed weight late in filling in both years.
- Taxon
- soybeansGlycine maxe1
- Treatment
- Removal of two‐thirds of the leaf areae0
- Outcome
- weight per seede0
- Direction
- reducede0
- Qualifier
- near the end of the filling period in both years of studye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Removal of two‐thirds of the leaf area reduced the weight per seed near the end of the filling period in both years of study.”
e1“seed of soybeans ( Glycine max (L.) Merr.)”
Claim · model-written summary
Pod removal generally produced heavier pods than control.
- Taxon
- soybeansGlycine maxe1
- Treatment
- pod removal treatmentse0
- Outcome
- Pod weightse0
- Direction
- heaviere0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pod weights of the pod removal treatments were generally heavier than the control”
e1“seed of soybeans ( Glycine max (L.) Merr.)”
Claim · model-written summary
Leaf removal produced lighter pods than control.
- Taxon
- soybeansGlycine maxe1
- Treatment
- leaf removal treatmentse0
- Outcome
- podse0
- Direction
- lightere0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the pods from the leaf removal treatments were lighter than the control”
e1“seed of soybeans ( Glycine max (L.) Merr.)”
Claim · model-written summary
Defoliation lowered stem sap sugar concentration versus control.
- Taxon
- soybeansGlycine maxe1
- Treatment
- Defoliatione0
- Outcome
- concentration of sugar in the stem sape0
- Direction
- lowerede0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Defoliation lowered the concentration of sugar in the stem sap compared with the control”
e1“seed of soybeans ( Glycine max (L.) Merr.)”
Claim · model-written summary
Pod removal increased stem sugar concentration only late in filling.
- Taxon
- soybeansGlycine maxe1
- Treatment
- pod removale0
- Outcome
- concentration of stem sugarse0
- Direction
- increasede0
- Qualifier
- only near the end of the filling periode0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“pod removal increased the concentration of stem sugars only near the end of the filling period”
e1“seed of soybeans ( Glycine max (L.) Merr.)”
Claim · model-written summary
Authors interpreted seed growth rates as weakly related to photosynthate production.
- Taxon
- soybeansGlycine maxe1
- Organ / stage
- seede0
- Outcome
- seed growth ratese0
- Qualifier
- photosynthate productione0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“seed growth rates are not closely related to photosynthate production”
e1“seed of soybeans ( Glycine max (L.) Merr.)”
Claim · model-written summary
Authors interpreted storage carbohydrates as a buffer between seed growth and photosynthate production.
- Taxon
- soybeansGlycine maxe1
- Outcome
- seed growthe0
- Qualifier
- storage carbohydrates serve as a buffer between seed growth and photosynthate productione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“storage carbohydrates serve as a buffer between seed growth and photosynthate production”
e1“seed of soybeans ( Glycine max (L.) Merr.)”
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See all 110 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.