Abstract
Low concentrations of ethylene inhibit hypocotyl elongation of etiolated lettuce seedlings (Lactuca sativa cv. Grand Rapids), whereas red light does not inhibit it. The plumular hook tightens in response to either ethylene or red light. A combination of these two factors gives an additive response. Red light has no effect on ethylene production and red light will cause hook closure even under hypobaric pressure which removes endogenous ethylene. This suggests that ethylene and red light act independently in causing hook closure.These findings differ from those about etiolated beans where red light causes a decrease in ethylene production and a straightening of the plumular hook.
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Claims 8
Claim · model-written summary
Low ethylene inhibited hypocotyl elongation in etiolated lettuce seedlings.
- Taxon
- Lactuca sativa
Lactuca sativae0 - Material
- Grand Rapidse0
- Organ / stage
- hypocotyle0
- Treatment
- Low concentrations of ethylenee0
- Outcome
- hypocotyl elongatione0
- Direction
- inhibite0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Low concentrations of ethylene inhibit hypocotyl elongation of etiolated lettuce seedlings (Lactuca sativa cv. Grand Rapids)”
Claim · model-written summary
Red light did not inhibit hypocotyl elongation.
- Taxon
- LettuceLactuca sativat0
- Treatment
- red lighte0
- Outcome
- hypocotyl elongatione0
- Direction
- does not inhibite0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Low concentrations of ethylene inhibit hypocotyl elongation of etiolated lettuce seedlings (Lactuca sativa cv. Grand Rapids), whereas red light does not inhibit it.”
t0“Lettuce Seedlings”
Claim · model-written summary
Ethylene tightened the plumular hook.
- Taxon
- LettuceLactuca sativat0
- Organ / stage
- plumular hooke0
- Treatment
- ethylenee0
- Outcome
- plumular hook tightense0
- Direction
- tightense0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The plumular hook tightens in response to either ethylene or red light.”
t0“Lettuce Seedlings”
Claim · model-written summary
Red light tightened the plumular hook.
- Taxon
- LettuceLactuca sativat0
- Organ / stage
- plumular hooke0
- Treatment
- red lighte0
- Outcome
- plumular hook tightense0
- Direction
- tightense0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The plumular hook tightens in response to either ethylene or red light.”
t0“Lettuce Seedlings”
Claim · model-written summary
Ethylene and red light had an additive hook response.
- Taxon
- LettuceLactuca sativat0
- Treatment
- combination of these two factorse0
- Outcome
- additive responsee0
- Direction
- additivee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A combination of these two factors gives an additive response.”
t0“Lettuce Seedlings”
Claim · model-written summary
Red light had no effect on ethylene production.
- Taxon
- LettuceLactuca sativat0
- Treatment
- Red lighte0
- Outcome
- ethylene productione0
- Direction
- no effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Red light has no effect on ethylene production”
t0“Lettuce Seedlings”
Claim · model-written summary
Red light closed the hook even when hypobaric pressure removed endogenous ethylene.
- Taxon
- LettuceLactuca sativat0
- Treatment
- red lighte0
- Outcome
- hook closuree0
- Qualifier
- under hypobaric pressure which removes endogenous ethylenee0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“red light will cause hook closure even under hypobaric pressure which removes endogenous ethylene.”
t0“Lettuce Seedlings”
Claim · model-written summary
The authors inferred independent action of ethylene and red light in hook closure.
- Taxon
- LettuceLactuca sativat0
- Outcome
- hook closuree0
- Qualifier
- ethylene and red light act independentlye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This suggests that ethylene and red light act independently in causing hook closure.”
t0“Lettuce Seedlings”
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