Abstract
The leaf sheath base of the seedling of Avena sativa was characterized for growth response to hormones and sucrose. Six day old plants, raised under a 10:14 hr light:dark cycle, were excised at the coleoptilar node and 1 cm above the node for treatment. The growth of the leaf sheath base was promoted by gibberellic acid (GA3) and this response was dose dependent. The lag to response initiation was approximately 4 hr. Growth with or without GA3 (10 micromoles) was transient, diminishing appreciably after 48 hr. The addition of 10 mM sucrose greatly prolonged growth; the effect of GA3 and sucrose was additive. Neither indole-3-acetic acid (IAA) nor the cytokinin N6-benzyladenine (BA), alone or in combination, promoted the growth of leaf sheath bases. However, both significantly inhibited the action of GA3. The inhibitory effect of IAA was dose dependent and was not affected by the addition of BA or sucrose. These results indicate that the growth of leaf sheath bases of Avena sativa is promoted specifically by gibberellin, that this action depends on the availability of carbohydrates from outside of the leaf sheath base, and that the promotional effect of GA3 can be modified by either auxins or cytokinins.
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Claims 11
Claim · model-written summary
GA3 promoted leaf sheath base growth in a dose dependent manner.
- Taxon
- Avena sativa
Avena sativat0 - Treatment
- gibberellic acid (GA3)e0
- Outcome
- growth of the leaf sheath basee0
- Direction
- promotede0
- Qualifier
- dose dependente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The growth of the leaf sheath base was promoted by gibberellic acid (GA3) and this response was dose dependent.”
t0“Avena sativa”
Claim · model-written summary
The lag before sheath response was about four hours.
- Taxon
- Avena sativaAvena sativat0
- Outcome
- lag to response initiatione0
- Value
- approximately 4 hre0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The lag to response initiation was approximately 4 hr.”
t0“Avena sativa”
Claim · model-written summary
Growth with or without GA3 declined appreciably after 48 hours.
- Taxon
- Avena sativaAvena sativat0
- Outcome
- Growthe0
- Direction
- diminishinge0
- Value
- 48 hre0
- Qualifier
- with or without GA3 (10 micromoles)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Growth with or without GA3 (10 micromoles) was transient, diminishing appreciably after 48 hr.”
t0“Avena sativa”
Claim · model-written summary
Adding 10 mM sucrose greatly prolonged sheath growth.
- Taxon
- Avena sativaAvena sativat0
- Treatment
- 10 mM sucrosee0
- Outcome
- growthe0
- Direction
- prolongede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The addition of 10 mM sucrose greatly prolonged growth”
t0“Avena sativa”
Claim · model-written summary
GA3 and sucrose had additive growth effects.
- Taxon
- Avena sativaAvena sativat0
- Treatment
- GA3 and sucrosee0
- Outcome
- effecte0
- Direction
- additivee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the effect of GA3 and sucrose was additive.”
t0“Avena sativa”
Claim · model-written summary
IAA alone did not promote sheath base growth.
- Taxon
- Avena sativaAvena sativat0
- Treatment
- indole-3-acetic acid (IAA)e0
- Outcome
- growth of leaf sheath basese0
- Direction
- Neithere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Neither indole-3-acetic acid (IAA) nor the cytokinin N6-benzyladenine (BA), alone or in combination, promoted the growth of leaf sheath bases.”
t0“Avena sativa”
Claim · model-written summary
BA alone did not promote sheath base growth.
- Taxon
- Avena sativaAvena sativat0
- Treatment
- N6-benzyladenine (BA)e0
- Outcome
- growth of leaf sheath basese0
- Direction
- Neithere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Neither indole-3-acetic acid (IAA) nor the cytokinin N6-benzyladenine (BA), alone or in combination, promoted the growth of leaf sheath bases.”
t0“Avena sativa”
Claim · model-written summary
IAA and BA together did not promote sheath base growth.
- Taxon
- Avena sativaAvena sativat0
- Treatment
- indole-3-acetic acid (IAA) nor the cytokinin N6-benzyladenine (BA)e0
- Outcome
- growth of leaf sheath basese0
- Direction
- Neithere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Neither indole-3-acetic acid (IAA) nor the cytokinin N6-benzyladenine (BA), alone or in combination, promoted the growth of leaf sheath bases.”
t0“Avena sativa”
Claim · model-written summary
IAA significantly inhibited the GA3 growth response.
- Taxon
- Avena sativaAvena sativat0
- Treatment
- IAAe0
- Outcome
- action of GA3e0
- Direction
- inhibitede0
- Comparator
- GA3e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Neither indole-3-acetic acid (IAA) nor the cytokinin N6-benzyladenine (BA), alone or in combination, promoted the growth of leaf sheath bases. However, both significantly inhibited the action of GA3.”
t0“Avena sativa”
Claim · model-written summary
BA significantly inhibited the GA3 growth response.
- Taxon
- Avena sativaAvena sativat0
- Treatment
- BAe0
- Outcome
- action of GA3e0
- Direction
- inhibitede0
- Comparator
- GA3e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Neither indole-3-acetic acid (IAA) nor the cytokinin N6-benzyladenine (BA), alone or in combination, promoted the growth of leaf sheath bases. However, both significantly inhibited the action of GA3.”
t0“Avena sativa”
Claim · model-written summary
The inhibitory effect of IAA was dose dependent and unaffected by BA or sucrose.
- Taxon
- Avena sativaAvena sativat0
- Treatment
- IAAe0
- Outcome
- inhibitory effecte0
- Qualifier
- dose dependente0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The inhibitory effect of IAA was dose dependent and was not affected by the addition of BA or sucrose.”
t0“Avena sativa”
The same questions in other papers
indole-3-acetic acid · growth · Avena sativa (oats)Results differ
3 papers in the same direction as this paper · 7 in the opposite direction
- positive
- positive
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See all 11 papers →indole-3-acetic acid · molecular: metabolites · Avena sativa (oats)Positive and negative results
1 paper in the same direction as this paper · 2 in the opposite direction
- positive
- positive
- no effect
N-benzyladenine · growth · Avena sativa (oats)Positive and negative results
3 in the opposite direction
- positive
- positive
- positive
sucrose · growth · Avena sativa (oats)Positive and negative results
3 papers in the same direction as this paper · 1 in the opposite direction
- negative
- positive
- positive
1 paper more in this group
See all 5 papers →gibberellin A3 · growth · Avena sativa (oats)Results agree
1 paper in the same direction as this paper
- positive
class · growth · Avena sativa (oats)Positive and negative results
3 papers in the same direction as this paper · 8 in the opposite direction
- positive
- positive
- positive
8 papers more in this group
See all 12 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.