Abstract
Tomato pollen grains germinate readily in a solution containing only sugar and boric acid, although subsequent growth is at a rate much lower than that in the style. These experiments were designed to test the hypothesis that the action of boron is to prevent the toxic effects of high auxin levels, and to investigate the role of auxin in germination and pollen-tube growth.No evidence could be found for an interaction between indol-3yl-acetic acid and boron of the kind required by the hypothesis. Several inhibitors of growth and metabolism (maleic hydrazide, trans-cinnamic acid, iodoacetate and abscisic acid), and indol-3yl-acetic acid at high concentrations and ethylene inhibited germination to varying extents, but promoted tube elongation. It is suggested that there are two distinct phases in the early growth of the pollen grain-germination and elongation-and that they differ in their sensitivity to chemical treatment. An active endogenous inhibitory system appears to be established soon after germination, which controls the rate of growth of the pollen tube. This inhibitory system can be inactivated by treatments which cause the production of ethylene.
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Claims 13
Claim · model-written summary
Tomato pollen germinated readily in sugar and boric acid solution.
- Taxon
- Tomato
Solanum lycopersicume0 - Treatment
- sugar and boric acide0
- Outcome
- pollen grains germinate readilye0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Tomato pollen grains germinate readily in a solution containing only sugar and boric acid”
Claim · model-written summary
Pollen growth in solution was much slower than in the style.
- Taxon
- TomatoSolanum lycopersicumt0
- Outcome
- subsequent growthe0
- Direction
- much lowere0
- Comparator
- the stylee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“subsequent growth is at a rate much lower than that in the style”
t0“Tomato”
Claim · model-written summary
No evidence supported an interaction of indol-3yl-acetic acid with boron.
- Taxon
- TomatoSolanum lycopersicumt0
- Compound
- indol-3yl-acetic acide0
- Outcome
- interaction between indol-3yl-acetic acid and borone0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“No evidence could be found for an interaction between indol-3yl-acetic acid and boron of the kind required by the hypothesis”
t0“Tomato”
Claim · model-written summary
Maleic hydrazide inhibited pollen germination.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- maleic hydrazidee0
- Outcome
- germinatione0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“maleic hydrazide, trans-cinnamic acid, iodoacetate and abscisic acid), and indol-3yl-acetic acid at high concentrations and ethylene inhibited germination”
t0“Tomato”
Claim · model-written summary
Trans-cinnamic acid inhibited pollen germination.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- trans-cinnamic acide0
- Outcome
- germinatione0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“trans-cinnamic acid, iodoacetate and abscisic acid), and indol-3yl-acetic acid at high concentrations and ethylene inhibited germination”
t0“Tomato”
Claim · model-written summary
Iodoacetate inhibited pollen germination.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- iodoacetatee0
- Outcome
- germinatione0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“iodoacetate and abscisic acid), and indol-3yl-acetic acid at high concentrations and ethylene inhibited germination”
t0“Tomato”
Claim · model-written summary
Abscisic acid inhibited pollen germination.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- abscisic acide0
- Outcome
- germinatione0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“abscisic acid), and indol-3yl-acetic acid at high concentrations and ethylene inhibited germination”
t0“Tomato”
Claim · model-written summary
High levels of indol-3yl-acetic acid inhibited pollen germination.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- indol-3yl-acetic acid at high concentrationse0
- Outcome
- germinatione0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“indol-3yl-acetic acid at high concentrations and ethylene inhibited germination”
t0“Tomato”
Claim · model-written summary
Ethylene inhibited pollen germination.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- ethylenee0
- Outcome
- germinatione0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“ethylene inhibited germination to varying extents, but promoted tube elongation”
t0“Tomato”
Claim · model-written summary
The tested inhibitors promoted pollen tube elongation.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- Several inhibitors of growth and metabolisme0
- Outcome
- tube elongatione0
- Direction
- promotede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Several inhibitors of growth and metabolism (maleic hydrazide, trans-cinnamic acid, iodoacetate and abscisic acid), and indol-3yl-acetic acid at high concentrations and ethylene inhibited germination to varying extents, but promoted tube elongation”
t0“Tomato”
Claim · model-written summary
The authors infer that germination and elongation have distinct chemical sensitivities.
- Taxon
- TomatoSolanum lycopersicumt0
- Outcome
- differ in their sensitivity to chemical treatmente0
- Qualifier
- two distinct phases in the early growth of the pollen grain-germination and elongatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there are two distinct phases in the early growth of the pollen grain-germination and elongation-and that they differ in their sensitivity to chemical treatment”
t0“Tomato”
Claim · model-written summary
An endogenous inhibitory system appears to control pollen tube growth after germination.
- Taxon
- TomatoSolanum lycopersicumt0
- Outcome
- rate of growth of the pollen tubee0
- Qualifier
- active endogenous inhibitory systeme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“An active endogenous inhibitory system appears to be established soon after germination, which controls the rate of growth of the pollen tube”
t0“Tomato”
Claim · model-written summary
Treatments producing ethylene can inactivate the proposed inhibitory system.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- treatments which cause the production of ethylenee0
- Outcome
- inhibitory system can be inactivatede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This inhibitory system can be inactivated by treatments which cause the production of ethylene”
t0“Tomato”
The same questions in other papers
ethene · growth · Solanum lycopersicum (tomato)Results differ
11 papers in the same direction as this paper · 10 in the opposite direction
- positive
- positive
- positive
18 papers more in this group
See all 22 papers →Maleic hydrazide · growth · Solanum lycopersicum (tomato)Positive and negative results
2 papers in the same direction as this paper · 1 in the opposite direction
- positive
- no effect
- no effect
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.