Abstract
Hilton, J. R. and Thomas, B. 1987. Photoregulation of phytochrome synthesis in germinating embryos of Avena sativa L.—J. exp. Bot. 38: 1704–1712. The effect of light on the accumulation of phytochrome in germinating Avena embryos was determined. A quantitative ELISA using monoclonal antibody AFRC MAC 56 was used to measure specifically type 1 (or dark) phytochrome. A pulse of red light given after 14 h imbibition but prior to the onset of type 1 phytochrome synthesis, strongly inhibited subsequent type 1 phytochrome accumulation. This effect of red light at 14 h was reversible by far-red light indicating the involvement of phytochrome. Red light also inhibited phytochrome synthesis after 18 h and 24 h imbibition but after 24 h, far-red light did not reverse the effect. The effect of red light treatment at 18 h was reversed by giving a pulse of far-red light at any time up to 30 h. Seed germination was not influenced by light under the conditions of these experiments. It is proposed that type 2 (or light) phytochrome may be responsible for photoregulation of type 1 phytochrome synthesis in germinating Avena embryos.
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Claims 8
Claim · model-written summary
A red-light pulse after 14 h imbibition strongly inhibited subsequent type 1 phytochrome accumulation.
- Taxon
- Avena sativa
Avena sativat0 - Treatment
- A pulse of red light given after 14 h imbibitione0
- Outcome
- type 1 phytochrome accumulatione0
- Direction
- strongly inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A pulse of red light given after 14 h imbibition but prior to the onset of type 1 phytochrome synthesis, strongly inhibited subsequent type 1 phytochrome accumulation”
t0“Avena sativa”
Claim · model-written summary
Far-red light reversed the inhibition caused by red light at 14 h.
- Taxon
- Avena sativaAvena sativat0
- Treatment
- far-red lighte0
- Outcome
- This effect of red light at 14 he0
- Direction
- reversiblee0
- Comparator
- red light at 14 he0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This effect of red light at 14 h was reversible by far-red light indicating the involvement of phytochrome”
t0“Avena sativa”
Claim · model-written summary
Red light inhibited phytochrome synthesis after 18 h imbibition.
- Taxon
- Avena sativaAvena sativat0
- Treatment
- Red lighte0
- Outcome
- phytochrome synthesise0
- Direction
- inhibitede0
- Qualifier
- after 18 he0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Red light also inhibited phytochrome synthesis after 18 h and 24 h imbibition”
t0“Avena sativa”
Claim · model-written summary
Red light inhibited phytochrome synthesis after 24 h imbibition.
- Taxon
- Avena sativaAvena sativat0
- Treatment
- Red lighte0
- Outcome
- phytochrome synthesise0
- Direction
- inhibitede0
- Qualifier
- 24 h imbibitione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Red light also inhibited phytochrome synthesis after 18 h and 24 h imbibition”
t0“Avena sativa”
Claim · model-written summary
Far-red light did not reverse the effect of red light after 24 h imbibition.
- Taxon
- Avena sativaAvena sativat0
- Treatment
- far-red lighte0
- Outcome
- the effecte0
- Direction
- did not reversee0
- Qualifier
- after 24 he0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“after 24 h, far-red light did not reverse the effect”
t0“Avena sativa”
Claim · model-written summary
A far-red pulse given up to 30 h reversed the red-light effect at 18 h.
- Taxon
- Avena sativaAvena sativat0
- Treatment
- a pulse of far-red lighte0
- Outcome
- The effect of red light treatment at 18 he0
- Direction
- reversede0
- Qualifier
- at any time up to 30 he0
- Comparator
- red light treatment at 18 he0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effect of red light treatment at 18 h was reversed by giving a pulse of far-red light at any time up to 30 h”
t0“Avena sativa”
Claim · model-written summary
Light did not influence seed germination under the experimental conditions.
- Taxon
- Avena sativaAvena sativat0
- Treatment
- lighte0
- Outcome
- Seed germinatione0
- Direction
- not influencede0
- Qualifier
- under the conditions of these experimentse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seed germination was not influenced by light under the conditions of these experiments”
t0“Avena sativa”
Claim · model-written summary
The authors propose that type 2 phytochrome may regulate type 1 phytochrome synthesis in germinating Avena embryos.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“It is proposed that type 2 (or light) phytochrome may be responsible for photoregulation of type 1 phytochrome synthesis in germinating Avena embryos”
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See all 12 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.