FERONIA regulates plant growth and survival under salt stress by modulating the dark reversion of phyB via a signature of phosphorylation
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PROVIDER: PRJNA778396 | ENA |
REPOSITORIES: ENA
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Project description:Here we report that FERONIA (FER) integrates phyB-mediated light signaling pathway to control salt stress response. Mutation in phytochrome B (phyB) largely suppresses the dwarfism and leaf bleaching phenotype of fer-4 mutant under salt stress. FER interacts with and phosphorylates the N-terminal domain of phyB. Mutation in fer-4 or disruption of the FER-mediated phosphorylation sites of phyB at Ser106 and Ser227 leads to a retention of phyB in the photobodies under dark conditions, suggesting that FER-mediated phosphorylation accelerates the dark reversion of phyB. Interestingly, salt stress slows down the dark reversion of phyB via the inhibition of the kinase activity of FER, and mutation of phyB or overexpression of PIF5 attenuates the salt-induced growth inhibition. Together, our study indicates that the plasma membrane-localized FER determines the dark reversion rate of phyB in the nucleus via a signature of phosphorylation and thus coordinates the extracellular stress signals and nuclear outputs to dynamically control plant growth and survival under stress conditions.
2021-11-08 | GSE188335 | GEO
Project description:Phytochromes mediate a profound developmental shift when dark-grown seedlings are exposed to light. Here we show that a subset of genes is up regulated in phytochrome B (phyB) mutants even before dark-grown seedlings are exposed to light. Most of these genes bear the RY cis motif, which is a binding site of the transcription factor ABSCISIC ACID INSENSITIVE 3 (ABI3), and the phyB mutation also enhanced ABI3 expression. These changes in transcriptome have physiological consequences as seedlings of the abi3 mutant showed enhanced responses to pulses of far-red light, while ABI3 overexpressers exhibited the opposite pattern. Seedlings of the wild type derived from seeds germinated in full darkness showed enhanced expression of genes bearing the RY cis motif and reduced responses to far-red light. We propose that, via changes in ABI3 expression, light, perceived mainly by phyB in the seed, generates a downstream trans-developmental phase signal that pre-conditions the seedling to its most likely environment. , ,
2007-06-27 | E-GEOD-3038 | biostudies-arrayexpress
Project description:Seedling hypocotyls display negative gravitropism in the dark but agravitropism in the light. The Arabidopsis thaliana pif quadruple mutant (pifQ), which lacks four PHYTOCHROME-INTERACTING FACTORS (PIFs), is agravitropic in the dark. Endodermis-specific expression of PIF1 rescues gravitropism in pifQ mutant seedlings. Since phytochromes induce light responses by inhibiting PIFs and the COP1-SPA ubiquitin E3 ligase complex in the nucleus, we asked whether phyB can cell autonomously inhibit hypocotyl negative gravitropism in the endodermis. We found that while epidermis-specific expression of PHYB rescues hypocotyl negative gravitropism and all other phyB mutant phenotypes, endodermis-specific expression of PHYB does not. Epidermal phyB induces the phosphorylation and degradation of endodermal PIFs in response to red light. This induces a global gene expression pattern similar to that induced by red light treatment of seedlings expressing PHYB under the control of its own endogenous promoter. Our results imply that epidermal phyB generates an unidentified mobile signal that travels to the endodermis where it promotes PIF degradation and inhibits hypocotyl negative gravitropism.
2017-02-08 | GSE87591 | GEO
Project description:Arabidopsis noncoding RNA HID1 acts as a positive regulator to promote phyB-mediated seed germination by modulating the biosynthesis of abscisic acid.
2024-05-05 | GSE195747 | GEO
Project description:Arabidopsis noncoding RNA HID1 acts as a positive regulator to promote phyB-mediated seed germination by modulating the biosynthesis of abscisic acid.
2024-05-05 | GSE195746 | GEO
Project description:Arabidopsis noncoding RNA HID1 acts as a positive regulator to promote phyB-mediated seed germination by modulating the biosynthesis of abscisic acid.
2024-05-04 | GSE195745 | GEO
Project description:Phytochromes mediate a profound developmental shift when dark-grown seedlings are exposed to light. Here we show that a subset of genes is up regulated in phytochrome B (phyB) mutants even before dark-grown seedlings are exposed to light. Most of these genes bear the RY cis motif, which is a binding site of the transcription factor ABSCISIC ACID INSENSITIVE 3 (ABI3), and the phyB mutation also enhanced ABI3 expression. These changes in transcriptome have physiological consequences as seedlings of the abi3 mutant showed enhanced responses to pulses of far-red light, while ABI3 overexpressers exhibited the opposite pattern. Seedlings of the wild type derived from seeds germinated in full darkness showed enhanced expression of genes bearing the RY cis motif and reduced responses to far-red light. We propose that, via changes in ABI3 expression, light, perceived mainly by phyB in the seed, generates a downstream trans-developmental phase signal that pre-conditions the seedling to its most likely environment. Experiment Overall Design: We analysed the transcriptome profile in dark grown seedlings of the WT, and phyA phyB photoreceptor mutants. All seedlings have the same treatment (3d grown in complete darkness). We have two samples for each genotype that represent two replicates in each case.
2008-06-12 | E-GEOD-3002 | biostudies-arrayexpress
Project description:It has been established that the frequently reported early flowering phenotype of the phyB mutant is very sensitive to small changes in ambient temperature (Halliday et al., 2003). A 6oC drop in temperature to 16oC is sufficient to abolish the pronounced early flowering phyB phenotype observed at 22oC. Using Affymetrix technology we will identify genes that are differentially regulated at 16oC and 22oC in a phyB-specific manner using phyB mutant and wild type seedlings. 16 samples were used in this experiment.
2009-12-04 | E-GEOD-19258 | biostudies-arrayexpress
Project description:Phytochromes mediate a profound developmental shift when dark-grown seedlings are exposed to light. Here we show that a subset of genes is up regulated in phytochrome B (phyB) mutants even before dark-grown seedlings are exposed to light. Most of these genes bear the RY cis motif, which is a binding site of the transcription factor ABSCISIC ACID INSENSITIVE 3 (ABI3), and the phyB mutation also enhanced ABI3 expression. These changes in transcriptome have physiological consequences as seedlings of the abi3 mutant showed enhanced responses to pulses of far-red light, while ABI3 overexpressers exhibited the opposite pattern. Seedlings of the wild type derived from seeds germinated in full darkness showed enhanced expression of genes bearing the RY cis motif and reduced responses to far-red light. We propose that, via changes in ABI3 expression, light, perceived mainly by phyB in the seed, generates a downstream trans-developmental phase signal that pre-conditions the seedling to its most likely environment. Keywords: Arabidopsis, photoreceptors, light signal transduction, environmental responses
2005-09-04 | GSE2919 | GEO
Project description:It has been established that the frequently reported early flowering phenotype of the phyB mutant is very sensitive to small changes in ambient temperature (Halliday et al., 2003). A 6oC drop in temperature to 16oC is sufficient to abolish the pronounced early flowering phyB phenotype observed at 22oC. Using Affymetrix technology we will identify genes that are differentially regulated at 16oC and 22oC in a phyB-specific manner using phyB mutant and wild type seedlings.
2009-12-05 | GSE19258 | GEO