Abstract
Light is one of the most important environmental factors that affects various cellular processes in plant growth and development; it is also crucial for the metabolism of carbohydrates as it provides the energy source for photosynthesis. Under extended darkness conditions, carbon starvation responses are triggered by depletion of stored energy. Although light rapidly inhibits starvation responses, the molecular mechanisms by which light signalling affects this process remain largely unknown. In this study, we showed that the Arabidopsis thaliana light signalling protein FAR-RED ELONGATED HYPOCOTYL3 (FHY3) and its homolog FAR-RED IMPAIRED RESPONSE1 (FAR1) are essential for plant survival after extended darkness treatment at both seedling and adult stages. Transmission electron microscopy analyses revealed that disruption of both FHY3 and FAR1 resulted in destruction of chloroplast envelopes and thylakoid membranes under extended darkness conditions. Furthermore, treatment with sucrose, but not glucose, completely rescued carbon starvation-induced cell death in the rosette leaves and arrested early seedling establishment in the fhy3 far1 plants. We thus concluded that the light signalling proteins FHY3 and FAR1 negatively regulate carbon starvation responses in Arabidopsis.
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Claims 5
Claim · model-written summary
FHY3 and FAR1 were essential for survival after extended darkness at seedling and adult stages.
- Taxon
- Arabidopsis thaliana
Arabidopsis thalianae0 - Organ / stage
- seedling and adult stagese0
- Treatment
- extended darkness treatmente0
- Gene
- FAR-RED ELONGATED HYPOCOTYL3 (FHY3)e0
- Outcome
- plant survivale0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the Arabidopsis thaliana light signalling protein FAR-RED ELONGATED HYPOCOTYL3 (FHY3) and its homolog FAR-RED IMPAIRED RESPONSE1 (FAR1) are essential for plant survival after extended darkness treatment at both seedling and adult stages”
Claim · model-written summary
Disrupting FHY3 and FAR1 destroyed chloroplast envelopes and thylakoid membranes under extended darkness.
- Taxon
- ArabidopsisArabidopsist0
- Organ / stage
- chloroplast envelopes and thylakoid membranese0
- Treatment
- disruption of both FHY3 and FAR1e0
- Gene
- FHY3 and FAR1e0
- Outcome
- destruction of chloroplast envelopes and thylakoid membranese0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“disruption of both FHY3 and FAR1 resulted in destruction of chloroplast envelopes and thylakoid membranes under extended darkness conditions”
t0“Arabidopsis”
Claim · model-written summary
Sucrose completely rescued carbon starvation-induced rosette leaf cell death in fhy3 far1 plants.
- Taxon
- ArabidopsisArabidopsist0
- Material
- fhy3 far1e0
- Organ / stage
- rosette leavese0
- Treatment
- sucrosee0
- Outcome
- carbon starvation-induced cell deathe0
- Direction
- rescuede0
- Comparator
- glucosee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“treatment with sucrose, but not glucose, completely rescued carbon starvation-induced cell death in the rosette leaves and arrested early seedling establishment in the fhy3 far1 plants”
t0“Arabidopsis”
Claim · model-written summary
Sucrose completely rescued arrested early seedling establishment in fhy3 far1 plants, unlike glucose.
- Taxon
- ArabidopsisArabidopsist0
- Material
- fhy3 far1e0
- Organ / stage
- early seedlinge0
- Treatment
- sucrosee0
- Outcome
- arrested early seedling establishmente0
- Direction
- rescuede0
- Comparator
- glucosee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“treatment with sucrose, but not glucose, completely rescued carbon starvation-induced cell death in the rosette leaves and arrested early seedling establishment in the fhy3 far1 plants”
t0“Arabidopsis”
Claim · model-written summary
FHY3 and FAR1 negatively regulate Arabidopsis carbon starvation responses.
- Taxon
- ArabidopsisArabidopsise0
- Gene
- FHY3 and FAR1e0
- Outcome
- carbon starvation responsese0
- Direction
- negatively regulatee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the light signalling proteins FHY3 and FAR1 negatively regulate carbon starvation responses in Arabidopsis”
The same questions in other papers
sucrose · growth · ArabidopsisPositive and negative results
8 papers in the same direction as this paper · 8 in the opposite direction
- negative
- negative
- negative
13 papers more in this group
See all 17 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.