Abstract
Six soybean [ Glycine max (L.) Merrill] genotypes which differed in growth characteristics were selected to test the hypothesis that genotypes differed in their capacity to maintain carbon exchange rates (CER) at original levels as assimilate accumulated. Chilling (4 C) a 3 cm section of the leaf petiole for 3 hours created a 5.3‐fold increase for sucrose and 1.4‐fold increase for starch in the leaf relative to the control leaves with nonchilled petioles. Levels of sucrose and starch continued to increase with an additional 4 hours of chilling the petiole. Sucrose and starch levels increased in the leaf blade primarily as compared with the petiole and leaf veins. Transpiration rates and stomatal diffusive resistances were similar for chilled and nonchilled petiole treatments. All genotypes had similar decreases in stomatal diffusive resistances during 3 hours of chilled petiole treatment. Differences in reduction of carbon exchange rates (CER) were found among genotypes when petioles were chilled for 3 hours. Those genotypes whose CER were unaltered by chilling did not accumulate more sucrose and starch in the leaves than genotypes whose CER declined. In a 7‐hour chilled petiole study, the change in CER was inversely proportional to level of sucrose in the leaf blade. Genotypic differences for maintaining CER with assimilate accumulation in the leaf were not found.
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Claims 10
Claim · model-written summary
Petiole chilling increased leaf sucrose 5.3-fold versus nonchilled leaves.
- Taxon
- Soybean
Glycine maxt0 - Treatment
- Chilling (4 C) a 3 cm section of the leaf petiole for 3 hourse0
- Outcome
- sucrosee0
- Direction
- increasee0
- Value
- 5.3‐folde0
- Comparator
- control leaves with nonchilled petiolese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Chilling (4 C) a 3 cm section of the leaf petiole for 3 hours created a 5.3‐fold increase for sucrose and 1.4‐fold increase for starch in the leaf relative to the control leaves with nonchilled petioles”
t0“Soybean”
Claim · model-written summary
Petiole chilling increased leaf starch 1.4-fold versus nonchilled leaves.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- Chilling (4 C) a 3 cm section of the leaf petiole for 3 hourse0
- Outcome
- starche0
- Direction
- increasee0
- Value
- 1.4‐folde0
- Comparator
- control leaves with nonchilled petiolese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Chilling (4 C) a 3 cm section of the leaf petiole for 3 hours created a 5.3‐fold increase for sucrose and 1.4‐fold increase for starch in the leaf relative to the control leaves with nonchilled petioles”
t0“Soybean”
Claim · model-written summary
Further chilling increased sucrose and starch levels.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- additional 4 hours of chilling the petiolee0
- Outcome
- Levels of sucrose and starche0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Levels of sucrose and starch continued to increase with an additional 4 hours of chilling the petiole”
t0“Soybean”
Claim · model-written summary
Sucrose and starch accumulated mainly in the leaf blade rather than petiole or veins.
- Taxon
- SoybeanGlycine maxt0
- Organ / stage
- leaf bladee0
- Outcome
- Sucrose and starch levelse0
- Comparator
- petiole and leaf veinse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sucrose and starch levels increased in the leaf blade primarily as compared with the petiole and leaf veins”
t0“Soybean”
Claim · model-written summary
Transpiration and stomatal resistance were similar under chilled and nonchilled petioles.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- chillede0
- Outcome
- Transpiration rates and stomatal diffusive resistancese0
- Direction
- similare0
- Comparator
- nonchilled petiole treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Transpiration rates and stomatal diffusive resistances were similar for chilled and nonchilled petiole treatments”
t0“Soybean”
Claim · model-written summary
All genotypes showed similar decreases in stomatal resistance during chilling.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- 3 hours of chilled petiole treatmente0
- Outcome
- stomatal diffusive resistancese0
- Direction
- decreasese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“All genotypes had similar decreases in stomatal diffusive resistances during 3 hours of chilled petiole treatment”
t0“Soybean”
Claim · model-written summary
Soybean genotypes differed in CER reduction after three hours of petiole chilling.
- Taxon
- SoybeanGlycine maxt0
- Material
- genotypese0
- Treatment
- petioles were chilled for 3 hourse0
- Outcome
- reduction of carbon exchange rates (CER)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Differences in reduction of carbon exchange rates (CER) were found among genotypes when petioles were chilled for 3 hours”
t0“Soybean”
Claim · model-written summary
Genotypes with unchanged CER did not accumulate more leaf sucrose and starch than genotypes with declining CER.
- Taxon
- SoybeanGlycine maxt0
- Material
- genotypes whose CER were unaltered by chillinge0
- Outcome
- sucrose and starch in the leavese0
- Direction
- did not accumulate moree0
- Comparator
- genotypes whose CER declinede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Those genotypes whose CER were unaltered by chilling did not accumulate more sucrose and starch in the leaves than genotypes whose CER declined”
t0“Soybean”
Claim · model-written summary
After seven hours of chilling, CER change was inversely proportional to leaf blade sucrose.
- Taxon
- SoybeanGlycine maxt0
- Organ / stage
- leaf bladee0
- Compound
- sucrosee0
- Outcome
- change in CERe0
- Direction
- inversely proportionale0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In a 7‐hour chilled petiole study, the change in CER was inversely proportional to level of sucrose in the leaf blade”
t0“Soybean”
Claim · model-written summary
Genotypic differences in maintaining CER with leaf assimilate accumulation were not found.
- Taxon
- SoybeanGlycine maxt0
- Outcome
- Genotypic differences for maintaining CER with assimilate accumulation in the leafe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Genotypic differences for maintaining CER with assimilate accumulation in the leaf were not found”
t0“Soybean”
The same questions in other papers
cold · molecular: metabolites · Glycine max (soybean)Positive and negative results
7 papers in the same direction as this paper · 3 in the opposite direction
- no effect
- negative
- negative
7 papers more in this group
See all 11 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.