Abstract
Abstract ABA inhibits the germination of Grand Rapids lettuce seeds at a temperature at which photoblastism is not observed. This ABA inhibition can be overcome by GA, or cytokinin, or red light acting alone or in concert. At high levels of ABA the ameliorative effects of GA, cytokinin or red light are not manifest and it is suggested that lettuce seeds' response to a given level of ABA is temperature dependent, and any interaction which may be observed between ABA and other regulators, or red light, likewise is temperature dependent. Seeds only actively metabolize ABA after germination is complete though ABA does influence the germination process proper. Some radioactivity, originally applied as 14 C ABA, cannot be extracted from 14 C ABA treated seeds by methanol, and this “fixed” ABA can constitute more than 50% of the activity taken up by the seeds. High levels of “fixed” ABA are found in seeds which do not germinate. As well as this “fixed” ABA two labelled metabolites arise in seeds treated with 14 C ABA. The levels of these rise in seed extracts as the level of extractable ABA decreases. Whilst ABA can affect germination our results do not allow us to assign a specific regulatory role to ABA in seed germination.
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Claims 11
Claim · model-written summary
ABA inhibits lettuce seed germination at a temperature at which photoblastism is not observed.
- Taxon
- lettuce
Lactuca sativae0 - Organ / stage
- seedse0
- Treatment
- ABAe0
- Outcome
- germinatione0
- Direction
- inhibitse0
- Qualifier
- at a temperature at which photoblastism is not observede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“ABA inhibits the germination of Grand Rapids lettuce seeds at a temperature at which photoblastism is not observed”
Claim · model-written summary
The ABA inhibition of lettuce seed germination can be overcome by GA, cytokinin, or red light.
- Taxon
- lettuceLactuca sativae0
- Organ / stage
- seedse0
- Treatment
- GA, or cytokinin, or red lighte1
- Outcome
- ABA inhibitione1
- Direction
- overcomee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“ABA inhibits the germination of Grand Rapids lettuce seeds at a temperature at which photoblastism is not observed”
e1“This ABA inhibition can be overcome by GA, or cytokinin, or red light acting alone or in concert”
Claim · model-written summary
At high levels of ABA the ameliorative effects of GA, cytokinin or red light are not manifest in lettuce seeds.
- Taxon
- lettuceLactuca sativae0
- Treatment
- high levels of ABAe2
- Outcome
- ameliorative effects of GA, cytokinin or red lighte2
- Direction
- not manifeste2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“ABA inhibits the germination of Grand Rapids lettuce seeds at a temperature at which photoblastism is not observed”
e2“At high levels of ABA the ameliorative effects of GA, cytokinin or red light are not manifest”
Claim · model-written summary
Lettuce seed response to a given level of ABA is suggested to be temperature dependent.
- Taxon
- lettuceLactuca sativae3
- Treatment
- temperaturee3
- Outcome
- response to a given level of ABAe3
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“it is suggested that lettuce seeds' response to a given level of ABA is temperature dependent”
Claim · model-written summary
Any interaction between ABA and other regulators or red light is suggested to be temperature dependent.
- Taxon
- lettuceLactuca sativae0
- Treatment
- temperaturee4
- Outcome
- interaction which may be observed between ABA and other regulatorse4
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“ABA inhibits the germination of Grand Rapids lettuce seeds at a temperature at which photoblastism is not observed”
e4“any interaction which may be observed between ABA and other regulators, or red light, likewise is temperature dependent”
Claim · model-written summary
Lettuce seeds actively metabolize ABA only after germination is complete.
- Taxon
- lettuceLactuca sativae0
- Organ / stage
- Seedse5
- Outcome
- actively metabolize ABAe5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“ABA inhibits the germination of Grand Rapids lettuce seeds at a temperature at which photoblastism is not observed”
e5“Seeds only actively metabolize ABA after germination is complete”
Claim · model-written summary
Fixed ABA can constitute more than 50% of the radioactivity taken up by lettuce seeds treated with 14C ABA.
- Taxon
- lettuceLactuca sativae0
- Treatment
- 14 C ABAe6
- Outcome
- activity taken up by the seedse6
- Value
- more than 50%e6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“ABA inhibits the germination of Grand Rapids lettuce seeds at a temperature at which photoblastism is not observed”
e6“Some radioactivity, originally applied as 14 C ABA, cannot be extracted from 14 C ABA treated seeds by methanol, and this “fixed” ABA can constitute more than 50% of the activity taken up by the seeds”
Claim · model-written summary
High levels of fixed ABA are found in lettuce seeds which do not germinate.
- Taxon
- lettuceLactuca sativae0
- Organ / stage
- seeds which do not germinatee7
- Outcome
- High levelse7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“ABA inhibits the germination of Grand Rapids lettuce seeds at a temperature at which photoblastism is not observed”
e7“High levels of “fixed” ABA are found in seeds which do not germinate”
Claim · model-written summary
Two labelled metabolites arise in lettuce seeds treated with 14C ABA.
- Taxon
- lettuceLactuca sativae0
- Organ / stage
- seedse7
- Treatment
- 14 C ABAe7
- Outcome
- two labelled metabolitese7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“ABA inhibits the germination of Grand Rapids lettuce seeds at a temperature at which photoblastism is not observed”
e7“two labelled metabolites arise in seeds treated with 14 C ABA”
Claim · model-written summary
Levels of the labelled metabolites rise in seed extracts as extractable ABA decreases.
- Taxon
- lettuceLactuca sativae0
- Compound
- extractable ABAe6
- Outcome
- levels of thesee6
- Direction
- risee6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“ABA inhibits the germination of Grand Rapids lettuce seeds at a temperature at which photoblastism is not observed”
e6“The levels of these rise in seed extracts as the level of extractable ABA decreases”
Claim · model-written summary
The results do not allow assigning a specific regulatory role to ABA in seed germination, although ABA can affect germination.
- Taxon
- lettuceLactuca sativae0
- Compound
- ABAe5
- Outcome
- germinatione5
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“ABA inhibits the germination of Grand Rapids lettuce seeds at a temperature at which photoblastism is not observed”
e5“Whilst ABA can affect germination our results do not allow us to assign a specific regulatory role to ABA in seed germination”
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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.