Abstract
, temperature, humidity, and drought. Recently, we showed that photoperiodic flowering components have positive effects on light-induced stomatal opening in Arabidopsis thaliana. In this study, we determined that light-induced stomatal opening and increased stomatal conductance were larger in plants grown under long-day (LD) conditions than in those grown under short-day (SD) conditions. Gene expression analyses using purified guard cell protoplasts revealed that FT and SOC1 expression levels were significantly increased under LD conditions. Interestingly, the enhancement of light-induced stomatal opening and increased SOC1 expression in guard cells due to LD conditions persisted for at least 1 week after plants were transferred to SD conditions. We then investigated histone modification using chromatin immunoprecipitation-PCR, and observed increased trimethylation of lysine 4 on histone 3 (H3K4) around SOC1. We also found that LD-dependent enhancement of light-induced stomatal opening and H3K4 trimethylation in SOC1 were suppressed in the ft-2 mutant. These results indicate that photoperiod is an important environmental cue regulating stomatal opening, and that LD conditions enhance light-induced stomatal opening and epigenetic modification (H3K4 trimethylation) around SOC1, a positive regulator of stomatal opening, in an FT-dependent manner. Thus, this study provides novel insights into stomatal responses to photoperiod.
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Claims 9
Claim · model-written summary
Long-day growth increased light-induced stomatal opening relative to short-day growth.
- Taxon
- Arabidopsis thaliana
Arabidopsis thalianat0 - Treatment
- long-day (LD) conditionse0
- Outcome
- light-induced stomatal openinge0
- Direction
- largere0
- Comparator
- short-day (SD) conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“light-induced stomatal opening and increased stomatal conductance were larger in plants grown under long-day (LD) conditions than in those grown under short-day (SD) conditions”
t0“Arabidopsis thaliana”
Claim · model-written summary
Long-day growth increased stomatal conductance relative to short-day growth.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Treatment
- long-day (LD) conditionse0
- Outcome
- stomatal conductancee0
- Direction
- largere0
- Comparator
- short-day (SD) conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“light-induced stomatal opening and increased stomatal conductance were larger in plants grown under long-day (LD) conditions than in those grown under short-day (SD) conditions”
t0“Arabidopsis thaliana”
Claim · model-written summary
FT expression in guard cells significantly increased under long days.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Treatment
- LD conditionse0
- Gene
- FTe0
- Outcome
- FT and SOC1 expression levelse0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“FT and SOC1 expression levels were significantly increased under LD conditions”
t0“Arabidopsis thaliana”
Claim · model-written summary
SOC1 expression in guard cells significantly increased under long days.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Treatment
- LD conditionse0
- Gene
- SOC1e0
- Outcome
- SOC1 expression levelse0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“FT and SOC1 expression levels were significantly increased under LD conditions”
t0“Arabidopsis thaliana”
Claim · model-written summary
Enhanced light-induced stomatal opening persisted for at least one week after transfer from long to short days.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Outcome
- light-induced stomatal openinge0
- Direction
- enhancemente0
- Value
- at least 1 weeke0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“enhancement of light-induced stomatal opening and increased SOC1 expression in guard cells due to LD conditions persisted for at least 1 week after plants were transferred to SD conditions”
t0“Arabidopsis thaliana”
Claim · model-written summary
Elevated SOC1 expression persisted for at least one week after transfer from long to short days.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Gene
- SOC1e0
- Outcome
- SOC1 expression in guard cellse0
- Direction
- increasede0
- Value
- at least 1 weeke0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“enhancement of light-induced stomatal opening and increased SOC1 expression in guard cells due to LD conditions persisted for at least 1 week after plants were transferred to SD conditions”
t0“Arabidopsis thaliana”
Claim · model-written summary
H3K4 trimethylation around SOC1 increased.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Gene
- SOC1e0
- Outcome
- trimethylation of lysine 4 on histone 3 (H3K4) around SOC1e0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increased trimethylation of lysine 4 on histone 3 (H3K4) around SOC1”
t0“Arabidopsis thaliana”
Claim · model-written summary
The ft-2 mutant suppressed long-day enhancement of stomatal opening.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Material
- ft-2 mutante0
- Treatment
- ft-2 mutante0
- Outcome
- light-induced stomatal openinge0
- Direction
- suppressede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“LD-dependent enhancement of light-induced stomatal opening and H3K4 trimethylation in SOC1 were suppressed in the ft-2 mutant”
t0“Arabidopsis thaliana”
Claim · model-written summary
The ft-2 mutant suppressed long-day H3K4 trimethylation in SOC1.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Material
- ft-2 mutante0
- Treatment
- ft-2 mutante0
- Outcome
- H3K4 trimethylation in SOC1e0
- Direction
- suppressede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“LD-dependent enhancement of light-induced stomatal opening and H3K4 trimethylation in SOC1 were suppressed in the ft-2 mutant”
t0“Arabidopsis thaliana”
The same questions in other papers
light · physiology: gas exchange · Arabidopsis thaliana (thale cress)Positive and negative results
3 papers in the same direction as this paper · 2 in the opposite direction
- negative
- negative
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2 papers more in this group
See all 6 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.