Abstract
The molecular requirements for ethylene action were investigated using the pea straight growth test. Biological activity requires an unsaturated bond adjacent to a terminal carbon atom, is inversely related to molecular size, and is decreased by substitutions which lower the electron density in the unsaturated position. Evidence is presented that ethylene binds to a metal containing receptor site. CO(2) is a competitive inhibitor of ethylene action, and prevents high concentrations of auxin (which stimulate ethylene formation) from retarding the elongation of etiolated pea stem sections. It is suggested that CO(2) delays fruit ripening by displacing the ripening hormone, ethylene, from its receptor site. Binding of ethylene to the receptor site is also impeded when the O(2) concentration is lowered, and this may explain why fruit ripening is delayed at low O(2) tensions.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 7
Claim · model-written summary
Biological activity requires an unsaturated bond adjacent to a terminal carbon atom
- Taxon
- pea
Lathyrus oleraceuse1 - Outcome
- Biological activitye0
- Qualifier
- unsaturated bond adjacent to a terminal carbon atome0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Biological activity requires an unsaturated bond adjacent to a terminal carbon atom”
e1“The molecular requirements for ethylene action were investigated using the pea straight growth test”
Claim · model-written summary
is inversely related to molecular size
- Taxon
- peaLathyrus oleraceuse1
- Treatment
- ethylenee1
- Outcome
- Biological activitye2
- Direction
- inversely relatede0
- Qualifier
- molecular sizee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“is inversely related to molecular size”
e1“The molecular requirements for ethylene action were investigated using the pea straight growth test”
e2“Biological activity requires an unsaturated bond adjacent to a terminal carbon atom”
Claim · model-written summary
is decreased by substitutions which lower the electron density in the unsaturated position
- Taxon
- peaLathyrus oleraceuse1
- Outcome
- Biological activitye2
- Direction
- decreasede0
- Qualifier
- substitutions which lower the electron density in the unsaturated positione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“is decreased by substitutions which lower the electron density in the unsaturated position”
e1“The molecular requirements for ethylene action were investigated using the pea straight growth test”
e2“Biological activity requires an unsaturated bond adjacent to a terminal carbon atom”
Claim · model-written summary
Ethylene was inferred to bind to a metal-containing receptor.
- Taxon
- peaLathyrus oleraceuse1
- Outcome
- ethylene binds to a metal containing receptor sitee0
- Qualifier
- metal containing receptor sitee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Evidence is presented that ethylene binds to a metal containing receptor site”
e1“pea straight growth test”
Claim · model-written summary
CO(2) competitively inhibited ethylene action.
- Taxon
- peaLathyrus oleraceuse1
- Treatment
- CO(2)e0
- Outcome
- ethylene actione0
- Direction
- inhibitore0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“CO(2) is a competitive inhibitor of ethylene action”
e1“pea straight growth test”
Claim · model-written summary
CO(2) prevented auxin-induced retardation of pea stem elongation.
- Taxon
- peaLathyrus oleraceuse0
- Treatment
- CO(2)e0
- Outcome
- elongation of etiolated pea stem sectionse0
- Direction
- preventse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“CO(2) is a competitive inhibitor of ethylene action, and prevents high concentrations of auxin (which stimulate ethylene formation) from retarding the elongation of etiolated pea stem sections”
Claim · model-written summary
Low O(2) impeded ethylene binding to the receptor site.
- Taxon
- peaLathyrus oleraceuse1
- Treatment
- O(2) concentratione0
- Outcome
- Binding of ethylene to the receptor sitee0
- Direction
- impedede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Binding of ethylene to the receptor site is also impeded when the O(2) concentration is lowered”
e1“pea straight growth test”
The same questions in other papers
co2 · growth · Lathyrus oleraceus (pea)Results differ
12 papers in the same direction as this paper · 4 in the opposite direction
- no effect
- negative
- negative
13 papers more in this group
See all 17 papers →co2 · physiology: hormones · Lathyrus oleraceus (pea)Positive and negative results
1 in the opposite direction
- 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.