Abstract
The relationships among soluble acid invertase, carbohydrate concentrations, and abscisic acid (ABA) were examined in developing soybean [ Glycine max L.(Merr.)] reproductive structures. Ontogenetic changes in enzyme activity and sucrose/glucose concentrations in flowers, pod walls, and immature seeds were followed from 2 to 30 days following flowering in growth chamber‐grown plants. The effect of exogenous ABA treatments on pod wall acid invertase and soluble carbohydrates was investigated in relation to the fluctuations in endogenous ABA in pod walls and seeds. The objective of the study was to determine potential mechanisms that may regulate early embryogenesis in soybeans. Flowers exhibited the highest acid invertase activity and activity in pod walls and seeds declined progressively from 2 to 30 days after flowering. Concentrations of sucrose and glucose in the respective tissues reflected invertase activity. Exogenous ABA stimulated invertase activity in 20‐to 25‐day old pod walls incubated in the presence of sucrose. Glucose concentrations recovered in the pod‐wall incubation medium also increased in the presence of ABA (1 to 100 μM), in accordance with the increase in invertase activity. The importance of glucose for development of immature seeds was demonstrated in experiments which showed that glucose was more effective than sucrose in enhancing the growth of seeds cultured in vitro. The data indicate that conversion of sucrose to glucose and possible regulation of acid invertase by ABA may play an important role in the growth of young soybean reproductive structures.
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Claims 7
Claim · model-written summary
Flowers had the highest acid invertase activity.
- Taxon
- Soybean
Glycine maxt0 - Organ / stage
- Flowerse0
- Outcome
- acid invertase activitye0
- Direction
- higheste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Flowers exhibited the highest acid invertase activity”
t0“Soybean”
Claim · model-written summary
Acid invertase activity in pod walls and seeds declined from 2 to 30 days after flowering.
- Taxon
- soybeanGlycine maxt0
- Outcome
- activity in pod walls and seedse0
- Direction
- declined progressivelye0
- Qualifier
- 2 to 30 days after floweringe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“activity in pod walls and seeds declined progressively from 2 to 30 days after flowering”
t0“Developing Soybean Reproductive Structures”
Claim · model-written summary
Sucrose and glucose concentrations in the respective tissues reflected invertase activity.
- Taxon
- SoybeanGlycine maxt0
- Gene
- invertasee0
- Outcome
- Concentrations of sucrose and glucosee0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Concentrations of sucrose and glucose in the respective tissues reflected invertase activity”
t0“Soybean”
Claim · model-written summary
Exogenous ABA stimulated invertase activity in 20-to 25-day old pod walls incubated with sucrose.
- Taxon
- SoybeanGlycine maxt0
- Organ / stage
- pod wallse0
- Treatment
- Exogenous ABAe0
- Outcome
- invertase activitye0
- Direction
- stimulatede0
- Qualifier
- 20‐to 25‐day olde0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Exogenous ABA stimulated invertase activity in 20‐to 25‐day old pod walls incubated in the presence of sucrose”
t0“Soybean”
Claim · model-written summary
ABA increased glucose concentrations in the pod-wall incubation medium.
- Taxon
- SoybeanGlycine maxt0
- Organ / stage
- pod‐walle0
- Treatment
- ABA (1 to 100 μM)e0
- Outcome
- Glucose concentrationse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Glucose concentrations recovered in the pod‐wall incubation medium also increased in the presence of ABA (1 to 100 μM)”
t0“Soybean”
Claim · model-written summary
Glucose enhanced the growth of cultured immature seeds more than sucrose.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- glucosee0
- Outcome
- growth of seedse0
- Direction
- more effectivee0
- Comparator
- sucrosee0
- Setting
- in vitroe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“glucose was more effective than sucrose in enhancing the growth of seeds cultured in vitro”
t0“Soybean”
Claim · model-written summary
Sucrose conversion to glucose and possible ABA regulation of invertase may contribute to young soybean reproductive growth.
- Taxon
- soybeanGlycine maxe0
- Outcome
- growth of young soybean reproductive structurese0
- Qualifier
- conversion of sucrose to glucose and possible regulation of acid invertase by ABAe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“conversion of sucrose to glucose and possible regulation of acid invertase by ABA may play an important role in the growth of young soybean reproductive structures”
The same questions in other papers
glucose · growth · Glycine max (soybean)Positive and negative results
2 papers in the same direction as this paper · 1 reporting no difference from an alternative
- no effect
- positive
- positive
(+)-abscisic acid · molecular: metabolites · Glycine max (soybean)Positive and negative results
5 papers in the same direction as this paper · 3 in the opposite direction
- no effect
- no effect
- negative
5 papers more in this group
See all 9 papers →(+)-abscisic acid · soil: biology · Glycine max (soybean)Results agree
1 paper in the same direction as this paper
- positive
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.