Abstract
Gibberellin A(4) (GA(4)) can substitute for light in the germination of Grand Rapids lettuce seeds. Seeds imbibed in [(3)H]GA(4) do not convert this to other GAs prior to, or immediately following, visible germination: thus GA(4) alone can promote radicle expansion. Abscisic acid inhibited [(3)H]GA(4)-induced germination, but did not significantly affect [(3)H]GA(4) uptake or metabolism during germination. (6)N-benzyladenine overcame the inhibitory effect of abscisic acid and increased [(3)H]GA(4) uptake, although radicle emergence was delayed somewhat.During hypocotyl extension there was a large conversion of [(3)H]GA(4) to [(3)H]GA(1) in light or darkness, the major conversion site being the growing root. Hypocotyls of dark-grown seedlings contained more [(3)H]GA(1) than those of light-grown seedlings. The apparent inability of exogenous GA(1) to promote greater hypocotyl extension than GA(4) is related to its poorer uptake. Abacisic acid markedly inhibited hypocotyl expansion, root growth, and the conversion of [(3)H]GA(4) to [(3)H]GA(1).
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Claims 14
Claim · model-written summary
GA4 substituted for light in Grand Rapids lettuce germination.
- Taxon
- lettuce
Lactuca sativae0 - Material
- Grand Rapidse0
- Treatment
- Gibberellin A(4)e0
- Outcome
- germinatione0
- Comparator
- lighte0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Gibberellin A(4) (GA(4)) can substitute for light in the germination of Grand Rapids lettuce seeds.”
Claim · model-written summary
Lettuce seeds did not convert GA4 to other gibberellins around visible germination.
- Taxon
- LettuceLactuca sativat0
- Organ / stage
- Seedse0
- Outcome
- do not convert this to other GAse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seeds imbibed in [(3)H]GA(4) do not convert this to other GAs prior to, or immediately following, visible germination”
t0“Lettuce, cv. Grand Rapids”
Claim · model-written summary
GA4 alone promoted radicle expansion.
- Taxon
- LettuceLactuca sativat0
- Treatment
- GA(4)e0
- Outcome
- radicle expansione0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“thus GA(4) alone can promote radicle expansion.”
t0“Lettuce, cv. Grand Rapids”
Claim · model-written summary
Abscisic acid inhibited GA4-induced germination.
- Taxon
- LettuceLactuca sativat0
- Treatment
- Abscisic acide0
- Outcome
- [(3)H]GA(4)-induced germinatione0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Abscisic acid inhibited [(3)H]GA(4)-induced germination”
t0“Lettuce, cv. Grand Rapids”
Claim · model-written summary
Abscisic acid did not significantly affect GA4 uptake or metabolism during germination.
- Taxon
- LettuceLactuca sativat0
- Treatment
- Abscisic acidt1
- Outcome
- [(3)H]GA(4) uptake or metabolisme0
- Direction
- did not significantly affecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“but did not significantly affect [(3)H]GA(4) uptake or metabolism during germination.”
t0“Lettuce, cv. Grand Rapids”
t1“Abscisic acid inhibited [(3)H]GA(4)-induced germination”
Claim · model-written summary
Benzyladenine overcame abscisic acid inhibition.
- Taxon
- LettuceLactuca sativat0
- Treatment
- (6)N-benzyladeninee0
- Outcome
- inhibitory effecte0
- Direction
- overcamee0
- Comparator
- abscisic acide0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“(6)N-benzyladenine overcame the inhibitory effect of abscisic acid”
t0“Lettuce, cv. Grand Rapids”
Claim · model-written summary
Benzyladenine increased GA4 uptake.
- Taxon
- LettuceLactuca sativat0
- Treatment
- (6)N-benzyladeninee0
- Outcome
- [(3)H]GA(4) uptakee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“(6)N-benzyladenine overcame the inhibitory effect of abscisic acid and increased [(3)H]GA(4) uptake”
t0“Lettuce, cv. Grand Rapids”
Claim · model-written summary
Benzyladenine somewhat delayed radicle emergence.
- Taxon
- LettuceLactuca sativat0
- Treatment
- (6)N-benzyladeninet1
- Outcome
- radicle emergencee0
- Direction
- delayede0
- Qualifier
- somewhate0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“although radicle emergence was delayed somewhat.”
t0“Lettuce, cv. Grand Rapids”
t1“(6)N-benzyladenine overcame the inhibitory effect of abscisic acid and increased [(3)H]GA(4) uptake”
Claim · model-written summary
GA4 was extensively converted to GA1 during hypocotyl extension in light and dark.
- Taxon
- LettuceLactuca sativat0
- Organ / stage
- hypocotyle0
- Outcome
- conversion of [(3)H]GA(4) to [(3)H]GA(1)e0
- Direction
- largee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“During hypocotyl extension there was a large conversion of [(3)H]GA(4) to [(3)H]GA(1) in light or darkness”
t0“Lettuce, cv. Grand Rapids”
Claim · model-written summary
The growing root was the main site of GA4 to GA1 conversion.
- Taxon
- LettuceLactuca sativat0
- Organ / stage
- growing roote0
- Outcome
- major conversion sitee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the major conversion site being the growing root.”
t0“Lettuce, cv. Grand Rapids”
Claim · model-written summary
Dark-grown hypocotyls contained more GA1 than light-grown hypocotyls.
- Taxon
- LettuceLactuca sativat0
- Organ / stage
- Hypocotylse0
- Treatment
- dark-growne0
- Outcome
- [(3)H]GA(1)e0
- Direction
- moree0
- Comparator
- light-growne0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Hypocotyls of dark-grown seedlings contained more [(3)H]GA(1) than those of light-grown seedlings.”
t0“Lettuce, cv. Grand Rapids”
Claim · model-written summary
Exogenous GA1 promoted no more hypocotyl extension than GA4, attributed to poorer uptake.
- Taxon
- LettuceLactuca sativat0
- Outcome
- hypocotyl extensione0
- Qualifier
- poorer uptakee0
- Comparator
- GA(4)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The apparent inability of exogenous GA(1) to promote greater hypocotyl extension than GA(4) is related to its poorer uptake.”
t0“Lettuce, cv. Grand Rapids”
Claim · model-written summary
Abscisic acid markedly inhibited hypocotyl expansion and root growth.
- Taxon
- LettuceLactuca sativat0
- Treatment
- Abacisic acide0
- Outcome
- hypocotyl expansion, root growthe0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Abacisic acid markedly inhibited hypocotyl expansion, root growth”
t0“Lettuce, cv. Grand Rapids”
Claim · model-written summary
Abscisic acid markedly inhibited GA4 to GA1 conversion.
- Taxon
- LettuceLactuca sativat0
- Treatment
- Abacisic acide0
- Outcome
- conversion of [(3)H]GA(4) to [(3)H]GA(1)e0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Abacisic acid markedly inhibited hypocotyl expansion, root growth, and the conversion of [(3)H]GA(4) to [(3)H]GA(1).”
t0“Lettuce, cv. Grand Rapids”
The same questions in other papers
N-benzyladenine · growth · Lactuca sativa (garden lettuce)Positive and negative results
1 paper in the same direction as this paper · 19 in the opposite direction
- positive
- positive
- positive
17 papers more in this group
See all 21 papers →N-benzyladenine · nutrient: content · Lactuca sativa (garden lettuce)Results agree
1 paper in the same direction as this paper
- positive
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.