Abstract
Abstract ‘GL 659’ and ‘Vanguard’ lettuce seed lots germinated almost completely at 30°C when treated with ethephon (100 mg/liter). Similar treatment at 35°C failed to release seeds from dormancy. Kinetin treatment (10 mg/liter) at 35°C was only moderately effective in breaking heat dormancy, but when ethephon and kinetin were combined at this temperature, the interaction was synergistic and germination was almost complete. The preincubation time requirement at 25°C before maximum germination could occur after transferring to 35°C was nearly eliminated by treating seeds with the ethephon-kinetin mixture. ‘Calmar’ seeds, which had a lower heat tolerance, could not be induced to germinate completely at high temperature by any treatment.
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Claims 6
Claim · model-written summary
Ethephon at 100 mg/liter made GL 659 and Vanguard lettuce seeds germinate almost completely at 30°C.
- Taxon
- Lettuce
Lactuca sativat0 - Material
- GL 659e1
- Organ / stage
- seed lotse1
- Treatment
- ethephon (100 mg/liter)e1
- Outcome
- germinated almost completelye1
- Qualifier
- at 30°Ce1
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Lettuce Seed Germination”
e1“‘GL 659’ and ‘Vanguard’ lettuce seed lots germinated almost completely at 30°C when treated with ethephon (100 mg/liter)”
Claim · model-written summary
Ethephon at 35°C failed to release lettuce seeds from dormancy.
- Taxon
- LettuceLactuca sativat0
- Treatment
- ethephon (100 mg/liter)e1
- Outcome
- release seeds from dormancye2
- Qualifier
- at 35°Ce2
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Lettuce Seed Germination”
e1“‘GL 659’ and ‘Vanguard’ lettuce seed lots germinated almost completely at 30°C when treated with ethephon (100 mg/liter)”
e2“Similar treatment at 35°C failed to release seeds from dormancy”
Claim · model-written summary
Kinetin at 10 mg/liter was only moderately effective in breaking heat dormancy at 35°C.
- Taxon
- LettuceLactuca sativat0
- Treatment
- Kinetin treatment (10 mg/liter)e3
- Outcome
- breaking heat dormancye3
- Qualifier
- only moderately effectivee3
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Lettuce Seed Germination”
e3“Kinetin treatment (10 mg/liter) at 35°C was only moderately effective in breaking heat dormancy”
Claim · model-written summary
The ethephon and kinetin combination acted synergistically and gave almost complete germination at 35°C.
- Taxon
- LettuceLactuca sativat0
- Treatment
- ethephon and kinetine4
- Outcome
- germinatione4
- Qualifier
- the interaction was synergistice4
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Lettuce Seed Germination”
e4“when ethephon and kinetin were combined at this temperature, the interaction was synergistic and germination was almost complete”
Claim · model-written summary
The ethephon-kinetin mixture nearly eliminated the preincubation time requirement for germination at 35°C.
- Taxon
- LettuceLactuca sativat0
- Treatment
- ethephon-kinetin mixturee5
- Outcome
- preincubation time requiremente5
- Direction
- nearly eliminatede5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Lettuce Seed Germination”
e5“The preincubation time requirement at 25°C before maximum germination could occur after transferring to 35°C was nearly eliminated by treating seeds with the ethephon-kinetin mixture”
Claim · model-written summary
Calmar lettuce seeds could not be induced to germinate completely at high temperature by any treatment.
- Taxon
- LettuceLactuca sativat0
- Material
- Calmare6
- Treatment
- any treatmente6
- Outcome
- germinate completelye6
- Qualifier
- at high temperaturee6
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Lettuce Seed Germination”
e6“‘Calmar’ seeds, which had a lower heat tolerance, could not be induced to germinate completely at high temperature by any treatment”
The same questions in other papers
(2-chloroethyl)phosphonic acid · growth · Lactuca sativa (garden lettuce)Results differ
4 papers in the same direction as this paper · 3 in the opposite direction
- positive
- no effect
- negative
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See all 8 papers →kinetin · growth · Lactuca sativa (garden lettuce)Positive and negative results
20 papers in the same direction as this paper · 3 in the opposite direction
- positive
- no effect
- no effect
20 papers more in this group
See all 24 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.