Abstract
Hormonal regulation of apical dominance in soybeans is dependent on the physiological stage of the lateral buds. In 7-day-old plants the cotyledonary buds are in an active state of mitosis and the application of a single hormone, gibberellic acid (GA) is effective in releasing the buds whilst indole acetic acid (IAA) is ineffective in inhibiting the buds of decapitated plants. In 16-day-old plants in which mitosis in the cotyledonary buds had ceased, a combination of both benzyladenine (BA) and GA was required for bud growth. BA initiated mitosis and GA promoted elongation. Application of IAA to the apical cut surface of these plants was effective in maintaining the inhibition of cotyledonary buds, and this inhibition could be overcome by a direct application of BA and GA to the inhibited buds. This study has shown that the growth of the inhibited cotyledonary buds in soybeans is regulated not only by auxins but by an interaction between auxins, cytokinins, and gibberellins. The effectiveness of any one of these hormones in inhibiting or promoting growth of the buds is dependent on the age of the plant.
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Claims 8
Claim · model-written summary
GA released cotyledonary buds in 7-day-old soybean plants.
- Taxon
- soybeans
Glycine maxt0 - Organ / stage
- cotyledonary budse0
- Treatment
- gibberellic acid (GA)e0
- Outcome
- releasing the budse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In 7-day-old plants the cotyledonary buds are in an active state of mitosis and the application of a single hormone, gibberellic acid (GA) is effective in releasing the buds”
t0“soybeans”
Claim · model-written summary
IAA failed to inhibit buds of decapitated 7-day-old plants.
- Taxon
- soybeansGlycine maxt0
- Treatment
- indole acetic acid (IAA)e0
- Outcome
- inhibiting the budse0
- Direction
- ineffectivee0
- Qualifier
- decapitated plantse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“indole acetic acid (IAA) is ineffective in inhibiting the buds of decapitated plants.”
t0“soybeans”
Claim · model-written summary
In 16-day-old plants, BA plus GA was required for cotyledonary bud growth.
- Taxon
- soybeansGlycine maxt0
- Organ / stage
- cotyledonary budse0
- Treatment
- combination of both benzyladenine (BA) and GAe0
- Outcome
- bud growthe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In 16-day-old plants in which mitosis in the cotyledonary buds had ceased, a combination of both benzyladenine (BA) and GA was required for bud growth.”
t0“soybeans”
Claim · model-written summary
BA initiated mitosis in buds.
- Taxon
- soybeansGlycine maxt0
- Treatment
- BAe0
- Outcome
- mitosise0
- Direction
- initiatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“BA initiated mitosis and GA promoted elongation.”
t0“soybeans”
Claim · model-written summary
GA promoted bud elongation.
- Taxon
- soybeansGlycine maxt0
- Treatment
- GAe0
- Outcome
- elongatione0
- Direction
- promotede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“BA initiated mitosis and GA promoted elongation.”
t0“soybeans”
Claim · model-written summary
IAA on the apical cut surface maintained inhibition of cotyledonary buds in older plants.
- Taxon
- soybeansGlycine maxt0
- Treatment
- Application of IAA to the apical cut surfacee0
- Outcome
- inhibition of cotyledonary budse0
- Direction
- maintaininge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Application of IAA to the apical cut surface of these plants was effective in maintaining the inhibition of cotyledonary buds”
t0“soybeans”
Claim · model-written summary
Direct BA plus GA overcame IAA-associated bud inhibition.
- Taxon
- soybeansGlycine maxt0
- Treatment
- direct application of BA and GAe0
- Outcome
- this inhibitione0
- Direction
- overcomee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“this inhibition could be overcome by a direct application of BA and GA to the inhibited buds.”
t0“soybeans”
Claim · model-written summary
Hormone effectiveness for bud inhibition or growth depends on plant age.
- Taxon
- soybeansGlycine maxt0
- Organ / stage
- age of the plante0
- Outcome
- effectiveness of any one of these hormones in inhibiting or promoting growth of the budse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effectiveness of any one of these hormones in inhibiting or promoting growth of the buds is dependent on the age of the plant.”
t0“soybeans”
The same questions in other papers
Gibberellic acid · growth · Glycine max (soybean)Results differ
29 papers in the same direction as this paper · 5 in the opposite direction
- no effect
- no effect
- no effect
31 papers more in this group
See all 35 papers →indole-3-acetic acid · disease · Glycine max (soybean)Positive and negative results
1 in the opposite direction
- positive
Gibberellic acid · disease · Glycine max (soybean)Positive and negative results
2 in the opposite direction
- no effect
- negative
N-benzyladenine · disease · 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.