Abstract
The growth of lateral buds (tillers), which are undergoing release from apical dominance, was measured in upright and gravistimulated intact Avena sativa L. cv. ;Victory' (oat) shoots as well as in isolated Avena stem segments treated with kinetin and sucrose. During release, the tiller bud initially shows a slow rate of elongation accompanied by swelling. It is followed by a more rapid rate of elongation. Ethylene (C(2)H(4)) production in shoot segments containing a tiller bud was found to occur at the onset of tiller swelling during gravistimulation as well as during inflorescence emergence. Exogenous application of indoleacetic acid or C(2)H(4) inhibits kinetin-induced tiller bud swelling and elongation. However, stem segments pulsed for 24 hours in C(2)H(4) or the C(2)H(4) biosynthesis precursor, 1-amino-cyclopropane-1-carboxylic acid (ACC) and then transferred to kinetin and sucrose, showed a significant increase in swelling elongation as compared with segments maintained under the same conditions but without C(2)H(4) or ACC in the pulse. Segments pulsed for 24 hours with kinetin and sucrose plus the ACC biosynthesis inhibitor, aminoethoxyvinylglycine, or the C(2)H(4) action inhibitor, CO(2), then transferred to kinetin and sucrose medium, showed inhibition of tiller swelling during the pulse and of subsequent elongation. These results indicate that C(2)H(4) plays a role in promoting tiller swelling during the onset of tiller release from apical dominance and may act as a modulator hormone in promoting tiller elongation in the presence of cytokinin.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 11
Claim · model-written summary
Tiller buds initially elongate slowly while swelling during release.
- Taxon
- Avena sativa
Avena sativae1 - Organ / stage
- tiller bude0
- Outcome
- slow rate of elongation accompanied by swellinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“During release, the tiller bud initially shows a slow rate of elongation accompanied by swelling”
e1“Avena sativa L. cv. ;Victory' (oat) shoots”
Claim · model-written summary
A more rapid tiller bud elongation follows the initial phase.
- Taxon
- Avena sativaAvena sativae1
- Outcome
- rate of elongatione0
- Direction
- more rapide0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“It is followed by a more rapid rate of elongation”
e1“Avena sativa L. cv. ;Victory' (oat) shoots”
Claim · model-written summary
Ethylene production begins at tiller swelling during gravistimulation.
- Taxon
- Avena sativaAvena sativae1
- Organ / stage
- tiller bude0
- Outcome
- Ethylene (C(2)H(4)) productione0
- Qualifier
- at the onset of tiller swelling during gravistimulatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ethylene (C(2)H(4)) production in shoot segments containing a tiller bud was found to occur at the onset of tiller swelling during gravistimulation”
e1“Avena sativa L. cv. ;Victory' (oat) shoots”
Claim · model-written summary
Ethylene production also occurs during inflorescence emergence.
- Taxon
- Avena sativaAvena sativae1
- Organ / stage
- inflorescencee0
- Outcome
- Ethylene (C(2)H(4)) productione2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“as well as during inflorescence emergence”
e1“Avena sativa L. cv. ;Victory' (oat) shoots”
e2“Ethylene (C(2)H(4)) production in shoot segments containing a tiller bud was found to occur at the onset of tiller swelling during gravistimulation”
Claim · model-written summary
Indoleacetic acid inhibits kinetin-induced tiller bud swelling and elongation.
- Taxon
- Avena sativaAvena sativae1
- Treatment
- indoleacetic acide0
- Outcome
- tiller bud swelling and elongatione0
- Direction
- inhibitse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Exogenous application of indoleacetic acid or C(2)H(4) inhibits kinetin-induced tiller bud swelling and elongation”
e1“Avena sativa L. cv. ;Victory' (oat) shoots”
Claim · model-written summary
Exogenous ethylene inhibits kinetin-induced tiller bud swelling and elongation.
- Taxon
- Avena sativaAvena sativae1
- Treatment
- C(2)H(4)e0
- Outcome
- tiller bud swelling and elongatione0
- Direction
- inhibitse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Exogenous application of indoleacetic acid or C(2)H(4) inhibits kinetin-induced tiller bud swelling and elongation”
e1“Avena sativa L. cv. ;Victory' (oat) shoots”
Claim · model-written summary
An ethylene pulse increased subsequent tiller swelling and elongation relative to no ethylene pulse.
- Taxon
- Avena sativaAvena sativae1
- Treatment
- C(2)H(4)e0
- Outcome
- swelling elongatione0
- Direction
- increasee0
- Qualifier
- 24 hourse0
- Comparator
- without C(2)H(4) or ACC in the pulsee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“stem segments pulsed for 24 hours in C(2)H(4) or the C(2)H(4) biosynthesis precursor, 1-amino-cyclopropane-1-carboxylic acid (ACC) and then transferred to kinetin and sucrose, showed a significant increase in swelling elongation as compared with segments maintained under the same conditions but without C(2)H(4) or ACC in the pulse”
e1“Avena sativa L. cv. ;Victory' (oat) shoots”
Claim · model-written summary
An ACC pulse increased subsequent tiller swelling and elongation relative to no ACC pulse.
- Taxon
- Avena sativaAvena sativae1
- Treatment
- 1-amino-cyclopropane-1-carboxylic acid (ACC)e0
- Outcome
- swelling elongatione0
- Direction
- increasee0
- Qualifier
- 24 hourse0
- Comparator
- without C(2)H(4) or ACC in the pulsee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“stem segments pulsed for 24 hours in C(2)H(4) or the C(2)H(4) biosynthesis precursor, 1-amino-cyclopropane-1-carboxylic acid (ACC) and then transferred to kinetin and sucrose, showed a significant increase in swelling elongation as compared with segments maintained under the same conditions but without C(2)H(4) or ACC in the pulse”
e1“Avena sativa L. cv. ;Victory' (oat) shoots”
Claim · model-written summary
Aminoethoxyvinylglycine during the pulse inhibited tiller swelling and later elongation.
- Taxon
- Avena sativaAvena sativae1
- Treatment
- aminoethoxyvinylglycinee0
- Outcome
- tiller swelling during the pulse and of subsequent elongatione0
- Direction
- inhibitione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Segments pulsed for 24 hours with kinetin and sucrose plus the ACC biosynthesis inhibitor, aminoethoxyvinylglycine, or the C(2)H(4) action inhibitor, CO(2), then transferred to kinetin and sucrose medium, showed inhibition of tiller swelling during the pulse and of subsequent elongation”
e1“Avena sativa L. cv. ;Victory' (oat) shoots”
Claim · model-written summary
CO2 during the pulse inhibited tiller swelling and later elongation.
- Taxon
- Avena sativaAvena sativae1
- Treatment
- CO(2)e0
- Outcome
- tiller swelling during the pulse and of subsequent elongatione0
- Direction
- inhibitione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Segments pulsed for 24 hours with kinetin and sucrose plus the ACC biosynthesis inhibitor, aminoethoxyvinylglycine, or the C(2)H(4) action inhibitor, CO(2), then transferred to kinetin and sucrose medium, showed inhibition of tiller swelling during the pulse and of subsequent elongation”
e1“Avena sativa L. cv. ;Victory' (oat) shoots”
Claim · model-written summary
Ethylene promotes tiller swelling at onset of release and may promote elongation with cytokinin.
- Taxon
- Avena sativaAvena sativae1
- Organ / stage
- tillere0
- Compound
- C(2)H(4)e0
- Outcome
- promoting tiller swellinge0
- Qualifier
- in the presence of cytokinine0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“C(2)H(4) plays a role in promoting tiller swelling during the onset of tiller release from apical dominance and may act as a modulator hormone in promoting tiller elongation in the presence of cytokinin”
e1“Avena sativa L. cv. ;Victory' (oat) shoots”
The same questions in other papers
1-aminocyclopropanecarboxylic acid · growth · Avena sativa (oats)Results agree
1 paper in the same direction as this paper
- positive
indole-3-acetic acid · yield · Avena sativa (oats)Results agree
2 papers in the same direction as this paper
- negative
- negative
co2 · yield · Avena sativa (oats)Positive and negative results
1 paper in the same direction as this paper · 2 in the opposite direction
- positive
- positive
- negative
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.