Abstract
Red light and gibberellic acid were about equally effective in promoting germination of Grand Rapids lettuce (Lactuca sativa L.) seeds. With initial far red light treatment more than 80% remained dormant in subsequent dark storage. After 2 days of dark storage, red light effectively promoted germination, while gibberellic acid action was weak. With between 2 and 10 days of dark storage, gibberellic acid had little effect, while promotion by red light decreased slowly and finally disappeared. After 10 days of dark storage, both gibberellic acid and red light were required for germination. The dark storage treatment interferes with phytochrome-independent germination processes and cannot be overcome by added gibberellic acid. However, storage may also decrease the effectiveness of endogenous gibberellins. Phytochrome-dependent germination seems to require only low levels of endogenous gibberellin activity or the addition of gibberellic acid. Gibberellins and red light appear to act on germination by regulation of sequential sites of a branched-looped pathway.
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Claims 11
Claim · model-written summary
Red light and gibberellic acid were about equally effective in promoting germination of lettuce seeds.
- Taxon
- Lactuca sativa
Lactuca sativae0 - Treatment
- Red lighte1
- Outcome
- germinatione1
- Direction
- about equally effectivee1
- Comparator
- gibberellic acide1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grand Rapids lettuce (Lactuca sativa L.) seeds”
e1“Red light and gibberellic acid were about equally effective in promoting germination”
Claim · model-written summary
With initial far red light treatment, more than 80% of seeds remained dormant in subsequent dark storage.
- Taxon
- Lactuca sativaLactuca sativae0
- Treatment
- initial far red light treatmente2
- Outcome
- remained dormante2
- Value
- more than 80%e2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grand Rapids lettuce (Lactuca sativa L.) seeds”
e2“With initial far red light treatment more than 80% remained dormant in subsequent dark storage”
Claim · model-written summary
After 2 days of dark storage, red light promoted germination.
- Taxon
- Lactuca sativaLactuca sativae0
- Treatment
- red lighte3
- Outcome
- germinatione3
- Direction
- promotede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grand Rapids lettuce (Lactuca sativa L.) seeds”
e3“After 2 days of dark storage, red light effectively promoted germination, while gibberellic acid action was weak”
Claim · model-written summary
After 2 days of dark storage, gibberellic acid action was weak.
- Taxon
- Lactuca sativaLactuca sativae0
- Treatment
- gibberellic acide3
- Outcome
- gibberellic acid actione3
- Qualifier
- weake3
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grand Rapids lettuce (Lactuca sativa L.) seeds”
e3“After 2 days of dark storage, red light effectively promoted germination, while gibberellic acid action was weak”
Claim · model-written summary
Between 2 and 10 days of dark storage, gibberellic acid had little effect on germination.
- Taxon
- Lactuca sativaLactuca sativae0
- Treatment
- gibberellic acide4
- Outcome
- effecte4
- Qualifier
- between 2 and 10 days of dark storagee4
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grand Rapids lettuce (Lactuca sativa L.) seeds”
e4“With between 2 and 10 days of dark storage, gibberellic acid had little effect, while promotion by red light decreased slowly and finally disappeared”
Claim · model-written summary
Between 2 and 10 days of dark storage, the promotion of germination by red light decreased slowly and finally disappeared.
- Taxon
- Lactuca sativaLactuca sativae0
- Treatment
- red lighte4
- Outcome
- promotion by red lighte4
- Direction
- decreasede4
- Qualifier
- slowly and finally disappearede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grand Rapids lettuce (Lactuca sativa L.) seeds”
e4“With between 2 and 10 days of dark storage, gibberellic acid had little effect, while promotion by red light decreased slowly and finally disappeared”
Claim · model-written summary
After 10 days of dark storage, both gibberellic acid and red light were required for germination.
- Taxon
- Lactuca sativaLactuca sativae0
- Treatment
- gibberellic acid and red lighte5
- Outcome
- germinatione5
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grand Rapids lettuce (Lactuca sativa L.) seeds”
e5“After 10 days of dark storage, both gibberellic acid and red light were required for germination”
Claim · model-written summary
Dark storage interferes with phytochrome-independent germination processes and cannot be overcome by added gibberellic acid.
- Taxon
- Lactuca sativaLactuca sativae0
- Treatment
- dark storage treatmente6
- Outcome
- phytochrome-independent germination processese6
- Qualifier
- cannot be overcome by added gibberellic acide6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grand Rapids lettuce (Lactuca sativa L.) seeds”
e6“The dark storage treatment interferes with phytochrome-independent germination processes and cannot be overcome by added gibberellic acid”
Claim · model-written summary
Storage may decrease the effectiveness of endogenous gibberellins.
- Taxon
- Lactuca sativaLactuca sativae0
- Compound
- endogenous gibberellinse7
- Outcome
- effectiveness of endogenous gibberellinse7
- Direction
- decreasee7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grand Rapids lettuce (Lactuca sativa L.) seeds”
e7“However, storage may also decrease the effectiveness of endogenous gibberellins”
Claim · model-written summary
Phytochrome-dependent germination seems to require only low levels of endogenous gibberellin activity or added gibberellic acid.
- Taxon
- Lactuca sativaLactuca sativae0
- Compound
- endogenous gibberelline2
- Outcome
- Phytochrome-dependent germinatione2
- Qualifier
- only low levels of endogenous gibberellin activitye2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grand Rapids lettuce (Lactuca sativa L.) seeds”
e2“Phytochrome-dependent germination seems to require only low levels of endogenous gibberellin activity or the addition of gibberellic acid”
Claim · model-written summary
Gibberellins and red light appear to act on germination by regulating sequential sites of a branched-looped pathway.
- Taxon
- Lactuca sativaLactuca sativae0
- Treatment
- red lighte2
- Compound
- Gibberellinse2
- Outcome
- germinatione2
- Qualifier
- regulation of sequential sites of a branched-looped pathwaye2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grand Rapids lettuce (Lactuca sativa L.) seeds”
e2“Gibberellins and red light appear to act on germination by regulation of sequential sites of a branched-looped pathway”
The same questions in other papers
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See all 5 papers →light · growth · Lactuca sativa (garden lettuce)Positive and negative results
242 papers in the same direction as this paper · 54 in the opposite direction · 3 reporting no difference from an alternative
- negative
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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.