Abstract
Excised apical segments of etiolated rice (Oryza sativa L.) coleoptiles produced ethylene. Increasing the number of cut sites per coleoptile increased the rate of ethylene formation. Ethylene produced by an etiolated-intact seedling in the dark was about a half of that by the excised coleoptile segment. Red light of low energy as well as of continuous irradiation inhibited the production of ethylene. The inhibition by a low energy dose of red light was partly relieved, if the red light was followed immediately by a small dose of far red light. The effect of red and far red light was repeatedly reversible, indicating that ethylene production was regulated by a phytochrome system. If the exposure to far red light was preceded by a period of darkness, this photoreversibility disappeared; 50% of the initial reversibility was lost within 5 hours. Applied ethylene (10 microliters per liter) significantly promoted the growth of intact coleoptiles of either totally etiolated or red light-treated seedlings, but had no effect on the excised apical segment of coleoptile.
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 10
Claim · model-written summary
Excised etiolated rice coleoptile segments produced ethylene.
- Taxon
- rice
Oryza sativae0 - Organ / stage
- coleoptilese0
- Outcome
- produced ethylenee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Excised apical segments of etiolated rice (Oryza sativa L.) coleoptiles produced ethylene.”
Claim · model-written summary
More cut sites per coleoptile increased ethylene formation.
- Taxon
- Oryza sativa LOryza sativat0
- Treatment
- Increasing the number of cut sites per coleoptilee0
- Outcome
- rate of ethylene formatione0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing the number of cut sites per coleoptile increased the rate of ethylene formation.”
t0“Oryza sativa L”
Claim · model-written summary
Intact dark-grown seedlings produced about half as much ethylene as excised coleoptile segments.
- Taxon
- Oryza sativa LOryza sativat0
- Outcome
- Ethylene producede0
- Value
- about a halfe0
- Comparator
- excised coleoptile segmente0
- Setting
- in the darke0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ethylene produced by an etiolated-intact seedling in the dark was about a half of that by the excised coleoptile segment.”
t0“Oryza sativa L”
Claim · model-written summary
Low-energy red light inhibited ethylene production.
- Taxon
- Oryza sativa LOryza sativat0
- Treatment
- Red light of low energye0
- Outcome
- production of ethylenee0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Red light of low energy as well as of continuous irradiation inhibited the production of ethylene.”
t0“Oryza sativa L”
Claim · model-written summary
Continuous red light inhibited ethylene production.
- Taxon
- Oryza sativa LOryza sativat0
- Treatment
- continuous irradiatione0
- Outcome
- production of ethylenee0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Red light of low energy as well as of continuous irradiation inhibited the production of ethylene.”
t0“Oryza sativa L”
Claim · model-written summary
Far-red light immediately after red light partly relieved inhibition of ethylene production.
- Taxon
- Oryza sativa LOryza sativat0
- Treatment
- a small dose of far red lighte0
- Outcome
- inhibitione0
- Direction
- partly relievede0
- Comparator
- a low energy dose of red lighte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The inhibition by a low energy dose of red light was partly relieved, if the red light was followed immediately by a small dose of far red light.”
t0“Oryza sativa L”
Claim · model-written summary
The red and far-red effect on ethylene production was repeatedly reversible.
- Taxon
- Oryza sativa LOryza sativat0
- Outcome
- effect of red and far red lighte0
- Qualifier
- repeatedly reversiblee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effect of red and far red light was repeatedly reversible, indicating that ethylene production was regulated by a phytochrome system.”
t0“Oryza sativa L”
Claim · model-written summary
Darkness before far-red exposure removed photoreversibility.
- Taxon
- Oryza sativa LOryza sativat0
- Treatment
- a period of darknesse0
- Outcome
- photoreversibilitye0
- Direction
- disappearede0
- Value
- 50%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“If the exposure to far red light was preceded by a period of darkness, this photoreversibility disappeared; 50% of the initial reversibility was lost within 5 hours.”
t0“Oryza sativa L”
Claim · model-written summary
Applied ethylene promoted intact coleoptile growth in etiolated and red-light-treated seedlings.
- Taxon
- Oryza sativa LOryza sativat0
- Treatment
- Applied ethylene (10 microliters per liter)e0
- Outcome
- growth of intact coleoptilese0
- Direction
- promotede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Applied ethylene (10 microliters per liter) significantly promoted the growth of intact coleoptiles of either totally etiolated or red light-treated seedlings”
t0“Oryza sativa L”
Claim · model-written summary
Applied ethylene had no effect on growth of excised apical coleoptile segments.
- Taxon
- Oryza sativa LOryza sativat0
- Treatment
- Applied ethylenee0
- Outcome
- excised apical segment of coleoptilee0
- Direction
- no effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Applied ethylene (10 microliters per liter) significantly promoted the growth of intact coleoptiles of either totally etiolated or red light-treated seedlings, but had no effect on the excised apical segment of coleoptile.”
t0“Oryza sativa L”
The same questions in other papers
ethene · growth · Oryza sativa (rice)Positive and negative results
18 papers in the same direction as this paper · 4 in the opposite direction
- no effect
- positive
- negative
19 papers more in this group
See all 23 papers →light · physiology: hormones · Oryza sativa (rice)Positive and negative results
3 papers in the same direction as this paper · 1 in the opposite direction
- positive
- negative
- no effect
1 paper more in this group
See all 5 papers →light · disease · Oryza sativa (rice)Positive and negative results
8 papers in the same direction as this paper · 11 in the opposite direction
- negative
- negative
- negative
16 papers more in this group
See all 20 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.