Abstract
Plant lifecycle starts from seed germination, which is regulated by various environmental cues and endogenous hormones. Light promotes seed germination mainly by phytochrome B (PHYB) during the initial phase of imbibition, which involves genome-wide light-responsive transcription changes. Recent studies indicated an involvement of multiple epigenetic factors in the control of seed germination. However, few studies have been reported about the role of a histone methyltransferase in light-mediated seed germination process. Here, we identified SUVH5, a histone H3 lysine 9 methyltransferase, as a positive regulator in light-mediated seed germination in Arabidopsis. Loss of function of SUVH5 leads to decreased PHYB-dependent seed germination. RNA-sequencing analysis displayed that SUVH5 regulates 24.6% of light-responsive transcriptome in imbibed seeds, which mainly related to hormonal signaling pathways and developmental processes. Furthermore, SUVH5 represses the transcription of ABA biosynthesis and signal transduction-related genes, as well as a family of DELAY OF GERMINATION (DOG) genes via dimethylation of histone H3 at lysine 9 (H3K9me2) in imbibed seeds. Taken together, our findings revealed that SUVH5 is a novel positive regulator of light-mediated seed germination in Arabidopsis.
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Claims 5
Claim · model-written summary
SUVH5 was identified as a positive regulator of light-mediated germination.
- Taxon
- Arabidopsis
Arabidopsise0 - Gene
- SUVH5e0
- Outcome
- light-mediated seed germinatione0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“we identified SUVH5, a histone H3 lysine 9 methyltransferase, as a positive regulator in light-mediated seed germination in Arabidopsis”
Claim · model-written summary
Loss of SUVH5 function decreased PHYB-dependent seed germination.
- Taxon
- ArabidopsisArabidopsist0
- Treatment
- Loss of function of SUVH5e0
- Gene
- SUVH5e0
- Outcome
- PHYB-dependent seed germinatione0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Loss of function of SUVH5 leads to decreased PHYB-dependent seed germination”
t0“Arabidopsis”
Claim · model-written summary
SUVH5 regulated 24.6% of the light-responsive transcriptome in imbibed seeds.
- Taxon
- ArabidopsisArabidopsist0
- Organ / stage
- imbibed seedse0
- Gene
- SUVH5e0
- Outcome
- light-responsive transcriptomee0
- Value
- 24.6%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“SUVH5 regulates 24.6% of light-responsive transcriptome in imbibed seeds”
t0“Arabidopsis”
Claim · model-written summary
SUVH5 repressed ABA biosynthesis and signal transduction genes through H3K9 dimethylation in imbibed seeds.
- Taxon
- ArabidopsisArabidopsist0
- Gene
- SUVH5e0
- Outcome
- transcription of ABA biosynthesis and signal transduction-related genese0
- Direction
- repressese0
- Qualifier
- dimethylation of histone H3 at lysine 9 (H3K9me2)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“SUVH5 represses the transcription of ABA biosynthesis and signal transduction-related genes, as well as a family of DELAY OF GERMINATION (DOG) genes via dimethylation of histone H3 at lysine 9 (H3K9me2) in imbibed seeds”
t0“Arabidopsis”
Claim · model-written summary
SUVH5 repressed DOG-family genes through H3K9 dimethylation in imbibed seeds.
- Taxon
- ArabidopsisArabidopsist0
- Gene
- SUVH5e0
- Outcome
- a family of DELAY OF GERMINATION (DOG) genese0
- Direction
- repressese0
- Qualifier
- dimethylation of histone H3 at lysine 9 (H3K9me2)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“SUVH5 represses the transcription of ABA biosynthesis and signal transduction-related genes, as well as a family of DELAY OF GERMINATION (DOG) genes via dimethylation of histone H3 at lysine 9 (H3K9me2) in imbibed seeds”
t0“Arabidopsis”
The same questions in other papers
loss of function · growth · ArabidopsisPositive and negative results
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