Abstract
The inhibition of germination of Grand Rapids lettuce (Lactuca sativa L.) seeds at 35 C was removed to a marked extent by kinetin and 2-chloroethylphosphonic acid (ethrel). When both compounds were used together, an additive effect was observed. A synergistic effect was, however, noted when ethrel promoted the kinetin reversal of abscisic acid inhibition of seed germination (light- as well as gibberellic acid-, induced). Both kinetin and ethrel increased the total ribosomal material and the percentage of polyribosomes in lettuce seeds imbibed in the light for 24 hours. A combination of the two compounds showed a synergism in polyribosome formation only at high ethrel concentration. The inability of ethrel to reverse abscisic acid inhibition indicates that kinetin action cannot always be substituted by ethrel. The possible mechanisms involved in the enhanced response by a combination of kinetin and ethrel are discussed.
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Claims 8
Claim · model-written summary
Kinetin markedly relieved 35 C inhibition of lettuce seed germination.
- Taxon
- lettuce
Lactuca sativae0 - Material
- Grand Rapidse0
- Treatment
- kinetine0
- Outcome
- germinatione0
- Direction
- removede0
- Qualifier
- 35 Ce0
- Comparator
- inhibition of germinatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The inhibition of germination of Grand Rapids lettuce (Lactuca sativa L.) seeds at 35 C was removed to a marked extent by kinetin and 2-chloroethylphosphonic acid (ethrel).”
Claim · model-written summary
Ethrel markedly relieved 35 C inhibition of lettuce seed germination.
- Taxon
- lettuceLactuca sativae0
- Treatment
- 2-chloroethylphosphonic acid (ethrel)e0
- Outcome
- germinatione0
- Direction
- removede0
- Qualifier
- 35 Ce0
- Comparator
- inhibition of germinatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The inhibition of germination of Grand Rapids lettuce (Lactuca sativa L.) seeds at 35 C was removed to a marked extent by kinetin and 2-chloroethylphosphonic acid (ethrel).”
Claim · model-written summary
Together, kinetin and ethrel had an additive effect on lettuce seed germination.
- Taxon
- lettuceLactuca sativae1
- Treatment
- both compoundse0
- Outcome
- additive effecte0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When both compounds were used together, an additive effect was observed.”
e1“Grand Rapids lettuce (Lactuca sativa L.) seeds”
Claim · model-written summary
Ethrel synergistically promoted kinetin reversal of abscisic acid inhibition of lettuce seed germination.
- Taxon
- lettuceLactuca sativae1
- Treatment
- ethrele0
- Outcome
- kinetin reversal of abscisic acid inhibition of seed germinatione0
- Direction
- promotede0
- Qualifier
- light- as well as gibberellic acid-, inducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A synergistic effect was, however, noted when ethrel promoted the kinetin reversal of abscisic acid inhibition of seed germination (light- as well as gibberellic acid-, induced).”
e1“Grand Rapids lettuce (Lactuca sativa L.) seeds”
Claim · model-written summary
Kinetin increased ribosomal material and polyribosome percentage in light-imbibed lettuce seeds.
- Taxon
- lettuceLactuca sativae0
- Treatment
- kinetine0
- Outcome
- total ribosomal material and the percentage of polyribosomese0
- Direction
- increasede0
- Qualifier
- imbibed in the light for 24 hourse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both kinetin and ethrel increased the total ribosomal material and the percentage of polyribosomes in lettuce seeds imbibed in the light for 24 hours.”
Claim · model-written summary
Ethrel increased ribosomal material and polyribosome percentage in light-imbibed lettuce seeds.
- Taxon
- lettuceLactuca sativae0
- Treatment
- ethrele0
- Outcome
- total ribosomal material and the percentage of polyribosomese0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both kinetin and ethrel increased the total ribosomal material and the percentage of polyribosomes in lettuce seeds imbibed in the light for 24 hours.”
Claim · model-written summary
The two compounds synergistically increased polyribosome formation only at high ethrel concentration.
- Taxon
- lettuceLactuca sativae1
- Treatment
- A combination of the two compoundse0
- Outcome
- polyribosome formatione0
- Direction
- synergisme0
- Qualifier
- only at high ethrel concentratione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A combination of the two compounds showed a synergism in polyribosome formation only at high ethrel concentration.”
e1“lettuce seeds imbibed in the light for 24 hours”
Claim · model-written summary
Ethrel did not reverse abscisic acid inhibition of lettuce seed germination.
- Taxon
- lettuceLactuca sativae1
- Treatment
- ethrele0
- Outcome
- abscisic acid inhibitione0
- Direction
- inabilitye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The inability of ethrel to reverse abscisic acid inhibition indicates that kinetin action cannot always be substituted by ethrel.”
e1“Grand Rapids lettuce (Lactuca sativa L.) seeds”
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
4 papers more in this group
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
- positive
- positive
20 papers more in this group
See all 24 papers →(2-chloroethyl)phosphonic acid · physiology: hormones · 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.