Abstract
Experiments are described in which at four stages of development main tillers of wheat (Triticum aestivum L.) were isolated and inserted in test-tubes containing distilled water or kinetin. Leaves and leaf sheaths were split off to expose a lateral bud approximately 3 mm long whose growth was measured during a period of 8 days. Kinetin at 6 ppm promoted bud elongation and dry-weight gain at all stages of development and in different light intensities and photoperiods. Reducing assimilate supply either by partial defoliation of the main tiller or treatment with DCMU inhibited bud growth during the early part of development, an effect which was relieved by kinetin. TIBA applied to prevent auxin transport increased bud growth at the first two but not later stages of development. Kinetin also inhibited nodal root growth consistently. At least two phases of bud control in grasses have to be considered, the first being the imposition of apical dominance after initiation of floral organs and stem elongation, the second being the release of buds from inhibition around ear emergence. Imposition of bud inhibition appears to be a function of auxin and assimilate supply, and at this stage the promoting effects of kinetin may be through its action of mobilizing flow of assimilates. The release of buds at a later stage is apparently not associated with auxin, and kinetin may no longer be concerned with assimilate flow but rather with overcoming an inhibitory effect on bud growth emanating from the leaves.
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Claims 14
Claim · model-written summary
Kinetin at 6 ppm promoted bud elongation at all stages and light regimes.
- Taxon
- Wheat
Triticum aestivumt0 - Treatment
- Kinetin at 6 ppme0
- Outcome
- bud elongatione0
- Direction
- promotede0
- Qualifier
- at all stages of development and in different light intensities and photoperiodse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Kinetin at 6 ppm promoted bud elongation and dry-weight gain at all stages of development and in different light intensities and photoperiods”
t0“Wheat (Triticum aestivum L.)”
Claim · model-written summary
Kinetin at 6 ppm promoted bud dry-weight gain.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- Kinetin at 6 ppme0
- Outcome
- dry-weight gaine0
- Direction
- promotede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Kinetin at 6 ppm promoted bud elongation and dry-weight gain at all stages of development and in different light intensities and photoperiods”
t0“Wheat”
Claim · model-written summary
Partial defoliation inhibited early bud growth.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- partial defoliation of the main tillere0
- Outcome
- bud growthe0
- Direction
- inhibitede0
- Qualifier
- during the early part of developmente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Reducing assimilate supply either by partial defoliation of the main tiller or treatment with DCMU inhibited bud growth during the early part of development”
t0“Wheat”
Claim · model-written summary
DCMU treatment inhibited early bud growth.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- treatment with DCMUe0
- Outcome
- bud growthe0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Reducing assimilate supply either by partial defoliation of the main tiller or treatment with DCMU inhibited bud growth during the early part of development”
t0“Wheat”
Claim · model-written summary
Kinetin relieved the early bud growth inhibition associated with reduced assimilate supply.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- kinetine0
- Outcome
- bud growthe0
- Direction
- relievede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“inhibited bud growth during the early part of development, an effect which was relieved by kinetin”
t0“Wheat”
Claim · model-written summary
TIBA increased bud growth at the first two stages.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- TIBA applied to prevent auxin transporte0
- Outcome
- bud growthe0
- Direction
- increasede0
- Qualifier
- at the first twoe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“TIBA applied to prevent auxin transport increased bud growth at the first two but not later stages of development”
t0“Wheat”
Claim · model-written summary
TIBA did not increase bud growth at later stages.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- TIBA applied to prevent auxin transporte0
- Outcome
- bud growthe0
- Qualifier
- not later stages of developmente0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“TIBA applied to prevent auxin transport increased bud growth at the first two but not later stages of development”
t0“Wheat”
Claim · model-written summary
Kinetin consistently inhibited nodal root growth.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- Kinetine0
- Outcome
- nodal root growthe0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Kinetin also inhibited nodal root growth consistently”
t0“Wheat”
Claim · model-written summary
Authors describe bud control as apical dominance after floral initiation and stem elongation.
- Taxon
- WheatTriticum aestivumt0
- Organ / stage
- floral organse0
- Outcome
- imposition of apical dominancee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the first being the imposition of apical dominance after initiation of floral organs and stem elongation”
t0“Wheat”
Claim · model-written summary
Authors describe a second control phase as bud release around ear emergence.
- Taxon
- WheatTriticum aestivumt0
- Organ / stage
- eare0
- Outcome
- release of buds from inhibitione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the second being the release of buds from inhibition around ear emergence”
t0“Wheat”
Claim · model-written summary
Authors suggest auxin and assimilate supply impose bud inhibition.
- Taxon
- WheatTriticum aestivumt0
- Compound
- auxine0
- Outcome
- bud inhibitione0
- Qualifier
- assimilate supplye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Imposition of bud inhibition appears to be a function of auxin and assimilate supply”
t0“Wheat”
Claim · model-written summary
Authors suggest kinetin promotes buds by mobilizing assimilate flow.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- kinetine0
- Outcome
- promoting effectse0
- Qualifier
- mobilizing flow of assimilatese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“promoting effects of kinetin may be through its action of mobilizing flow of assimilates”
t0“Wheat”
Claim · model-written summary
Authors suggest later bud release is not associated with auxin.
- Taxon
- WheatTriticum aestivumt0
- Compound
- auxine0
- Outcome
- release of buds at a later stagee0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“release of buds at a later stage is apparently not associated with auxin”
t0“Wheat”
Claim · model-written summary
Authors suggest kinetin overcomes leaf-derived inhibition at later stages.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- kinetine0
- Outcome
- bud growthe0
- Qualifier
- inhibitory effect on bud growth emanating from the leavese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“kinetin may no longer be concerned with assimilate flow but rather with overcoming an inhibitory effect on bud growth emanating from the leaves”
t0“Wheat”
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