Abstract
The germination of lettuce seeds (Lactuca sativa L., cv. Premier Great Lakes) was significantly inhibited by high temperature (32 C), 0.1 mM abscisic acid or 0.4 M mannitol. Ethylene (16 mul/1 of air) partially reversed the dormancy induced by all three inhibitors but only in the presence of 1 mM gibberellic acid (GA) or light. Neither ethylene plus GA nor ethylene plus light were able to promote germination when thermal inhibition was imposed at 36 C. Addition of 0.01 mM kinetin to the ethylene plus GA or light reversed thermodormancy at 36 C. The dormancy imposed by abscisic acid was also reversed by kinetin. Kinetin was unable to reverse the osmotic dormancy imposed by mannitol. The reversal of osmotic dormancy by ethylene or ethylene plus GA was actually inhibited by kinetin but only in the light. Kinetin apparently stimulates cotyledonary growth in the presence of light, and this growth may compete for certain metabolites critical to radicle growth and subsequent germination. Kinetin and ethylene, as demonstrated primarily in the thermodormancy at 36 C and in osmotic dormancy, appear to regulate a common event(s) leading to germination but through mechanisms unique to each respective growth regulator. The regulation of germination by ethylene is absolutely dependent upon an interaction with GA and/or light.
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Claims 12
Claim · model-written summary
High temperature at 32 C significantly inhibited lettuce seed germination.
- Taxon
- lettuce
Lactuca sativae0 - Treatment
- high temperature (32 C)e0
- Outcome
- germinatione0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The germination of lettuce seeds (Lactuca sativa L., cv. Premier Great Lakes) was significantly inhibited by high temperature (32 C), 0.1 mM abscisic acid or 0.4 M mannitol.”
Claim · model-written summary
Abscisic acid at 0.1 mM significantly inhibited lettuce seed germination.
- Taxon
- lettuceLactuca sativae0
- Treatment
- 0.1 mM abscisic acide0
- Outcome
- germinatione0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The germination of lettuce seeds (Lactuca sativa L., cv. Premier Great Lakes) was significantly inhibited by high temperature (32 C), 0.1 mM abscisic acid or 0.4 M mannitol.”
Claim · model-written summary
Mannitol at 0.4 M significantly inhibited lettuce seed germination.
- Taxon
- lettuceLactuca sativae0
- Treatment
- 0.4 M mannitole0
- Outcome
- germinatione0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The germination of lettuce seeds (Lactuca sativa L., cv. Premier Great Lakes) was significantly inhibited by high temperature (32 C), 0.1 mM abscisic acid or 0.4 M mannitol.”
Claim · model-written summary
Ethylene partially reversed dormancy from all three inhibitors only with gibberellic acid or light.
- Taxon
- lettuceLactuca sativae0
- Treatment
- Ethylene (16 mul/1 of air)e1
- Outcome
- dormancy induced by all three inhibitorse1
- Direction
- partially reversede1
- Qualifier
- only in the presence of 1 mM gibberellic acid (GA) or lighte1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“lettuce seeds (Lactuca sativa L., cv. Premier Great Lakes)”
e1“Ethylene (16 mul/1 of air) partially reversed the dormancy induced by all three inhibitors but only in the presence of 1 mM gibberellic acid (GA) or light.”
Claim · model-written summary
Ethylene plus GA or light did not promote germination at 36 C.
- Taxon
- lettuceLactuca sativae0
- Treatment
- ethylene plus GA nor ethylene plus lighte1
- Outcome
- germinatione1
- Direction
- Neithere1
- Qualifier
- thermal inhibition was imposed at 36 Ce1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“lettuce seeds (Lactuca sativa L., cv. Premier Great Lakes)”
e1“Neither ethylene plus GA nor ethylene plus light were able to promote germination when thermal inhibition was imposed at 36 C.”
Claim · model-written summary
Adding kinetin reversed thermodormancy at 36 C with ethylene plus GA or light.
- Taxon
- lettuceLactuca sativae0
- Treatment
- 0.01 mM kinetine1
- Outcome
- thermodormancy at 36 Ce1
- Direction
- reversede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“lettuce seeds (Lactuca sativa L., cv. Premier Great Lakes)”
e1“Addition of 0.01 mM kinetin to the ethylene plus GA or light reversed thermodormancy at 36 C.”
Claim · model-written summary
Kinetin reversed dormancy imposed by abscisic acid.
- Taxon
- lettuceLactuca sativae0
- Treatment
- kinetine1
- Outcome
- dormancy imposed by abscisic acide1
- Direction
- reversede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“lettuce seeds (Lactuca sativa L., cv. Premier Great Lakes)”
e1“The dormancy imposed by abscisic acid was also reversed by kinetin.”
Claim · model-written summary
Kinetin could not reverse mannitol-imposed osmotic dormancy.
- Taxon
- lettuceLactuca sativae0
- Treatment
- Kinetine1
- Outcome
- osmotic dormancy imposed by mannitole1
- Direction
- unable to reversee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“lettuce seeds (Lactuca sativa L., cv. Premier Great Lakes)”
e1“Kinetin was unable to reverse the osmotic dormancy imposed by mannitol.”
Claim · model-written summary
In light, kinetin inhibited reversal of osmotic dormancy by ethylene or ethylene plus GA.
- Taxon
- lettuceLactuca sativae0
- Treatment
- kinetine1
- Outcome
- reversal of osmotic dormancy by ethylene or ethylene plus GAe1
- Direction
- inhibitede1
- Qualifier
- only in the lighte1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“lettuce seeds (Lactuca sativa L., cv. Premier Great Lakes)”
e1“The reversal of osmotic dormancy by ethylene or ethylene plus GA was actually inhibited by kinetin but only in the light.”
Claim · model-written summary
Kinetin apparently stimulated cotyledon growth in light, potentially competing for metabolites needed by radicle growth and germination.
- Taxon
- lettuceLactuca sativae0
- Treatment
- Kinetine1
- Outcome
- cotyledonary growthe1
- Qualifier
- this growth may compete for certain metabolites critical to radicle growth and subsequent germinatione1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“lettuce seeds (Lactuca sativa L., cv. Premier Great Lakes)”
e1“Kinetin apparently stimulates cotyledonary growth in the presence of light, and this growth may compete for certain metabolites critical to radicle growth and subsequent germination.”
Claim · model-written summary
The authors infer that kinetin and ethylene regulate a common germination event through different mechanisms.
- Taxon
- lettuceLactuca sativae0
- Treatment
- Kinetin and ethylenee1
- Outcome
- common event(s) leading to germinatione1
- Qualifier
- through mechanisms unique to each respective growth regulatore1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“lettuce seeds (Lactuca sativa L., cv. Premier Great Lakes)”
e1“Kinetin and ethylene, as demonstrated primarily in the thermodormancy at 36 C and in osmotic dormancy, appear to regulate a common event(s) leading to germination but through mechanisms unique to each respective growth regulator.”
Claim · model-written summary
Ethylene regulation of germination depends on GA and/or light.
- Taxon
- lettuceLactuca sativae0
- Treatment
- ethylenee1
- Outcome
- regulation of germinatione1
- Qualifier
- absolutely dependent upon an interaction with GA and/or lighte1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“lettuce seeds (Lactuca sativa L., cv. Premier Great Lakes)”
e1“The regulation of germination by ethylene is absolutely dependent upon an interaction with GA and/or light.”
The same questions in other papers
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See all 300 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.