Abstract
Flower buds of a tomato ( Lycopersicon esculentum Mill.) gibberellin‐deficient mutant ( ga‐2/ga‐2 ) were initiated, but did not develop to maturity and eventually aborted. If GA, was applied to a developing inflorescence or stem tip, completion of flower bud development and fruit set occurred. In development of the ga‐2 flowers, the corolla and stamens did not elongate and the style was misshapen or extended past the tip of the anthers. Light microscope observations indicated that meiosis of both microsporocytes and megasporocytes did not occur. Cells of the sporogenous layer were initiated, but growth was arrested and they eventually degenerated. The ovary was normal in appearance. However, the megasporocytes degenerated, giving rise to a cavity in the ovule. Thus, although GA is not required for flower initiation in tomato, it is essential for meiosis of the microsporocytes and megasporocytes and elongation of the corolla and stamens.
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Claims 9
Claim · model-written summary
Flower buds initiated in the tomato ga‐2/ga‐2 mutant but did not mature and eventually aborted.
- Taxon
- tomato
Solanum lycopersicume0 - Material
- ga‐2/ga‐2e0
- Organ / stage
- Flower budse0
- Outcome
- did not develop to maturity and eventually abortede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Flower buds of a tomato ( Lycopersicon esculentum Mill.) gibberellin‐deficient mutant ( ga‐2/ga‐2 ) were initiated, but did not develop to maturity and eventually aborted.”
Claim · model-written summary
GA application to a developing inflorescence or stem tip completed flower bud development and fruit set.
- Taxon
- tomatoSolanum lycopersicumt0
- Organ / stage
- developing inflorescence or stem tipe0
- Treatment
- GAe0
- Outcome
- completion of flower bud development and fruit sete0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“If GA, was applied to a developing inflorescence or stem tip, completion of flower bud development and fruit set occurred.”
t0“TOMATO”
Claim · model-written summary
The corolla and stamens of ga‐2 flowers did not elongate.
- Taxon
- tomatoSolanum lycopersicumt0
- Material
- ga‐2e0
- Organ / stage
- corolla and stamense0
- Outcome
- did not elongatee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In development of the ga‐2 flowers, the corolla and stamens did not elongate”
t0“TOMATO”
Claim · model-written summary
The style of ga‐2 flowers was misshapen or extended beyond the anthers.
- Taxon
- tomatoSolanum lycopersicumt0
- Material
- ga‐2t0
- Organ / stage
- stylee0
- Outcome
- misshapen or extended past the tip of the antherse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the style was misshapen or extended past the tip of the anthers”
t0“TOMATO AND A GIBBERELLIN‐DEFICIENT (ga‐2) MUTANT”
Claim · model-written summary
Meiosis did not occur in tomato microsporocytes and megasporocytes.
- Taxon
- tomatoSolanum lycopersicumt0
- Organ / stage
- microsporocytes and megasporocytese0
- Outcome
- did not occure0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“meiosis of both microsporocytes and megasporocytes did not occur”
t0“TOMATO”
Claim · model-written summary
Sporogenous layer cells initiated, then arrested growth and degenerated.
- Taxon
- tomatoSolanum lycopersicumt0
- Organ / stage
- sporogenous layere0
- Outcome
- growth was arrested and they eventually degeneratede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cells of the sporogenous layer were initiated, but growth was arrested and they eventually degenerated.”
t0“TOMATO”
Claim · model-written summary
The ovary appeared normal in the mutant tomato flowers.
- Taxon
- tomatoSolanum lycopersicumt0
- Organ / stage
- ovarye0
- Outcome
- normal in appearancee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The ovary was normal in appearance.”
t0“TOMATO”
Claim · model-written summary
Megasporocytes degenerated, producing a cavity in the ovule.
- Taxon
- tomatoSolanum lycopersicumt0
- Organ / stage
- megasporocytese0
- Outcome
- degenerated, giving rise to a cavity in the ovulee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the megasporocytes degenerated, giving rise to a cavity in the ovule”
t0“TOMATO”
Claim · model-written summary
The authors infer GA is unnecessary for tomato flower initiation but essential for meiosis and corolla and stamen elongation.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- GAe0
- Outcome
- meiosis of the microsporocytes and megasporocytes and elongation of the corolla and stamense0
- Qualifier
- not required for flower initiatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“although GA is not required for flower initiation in tomato, it is essential for meiosis of the microsporocytes and megasporocytes and elongation of the corolla and stamens”
The same questions in other papers
Gibberellic acid · yield · Solanum lycopersicum (tomato)Results differ
50 papers in the same direction as this paper · 5 in the opposite direction
- no effect
- negative
- no effect
52 papers more in this group
See all 56 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.