Unknown,Transcriptomics,Genomics,Proteomics

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Transcriptomes of 35S:MYB106SRDX, 35S:WIN1SRDX and wild-type Arabidopsis seedling


ABSTRACT: Antirrhinum R2R3 MYB transcription factor MIXTA is known to regulate epidermal cell outgrowth in petal. Arabidopsis has three MIXTA-like proteins NOECK(NOK)/MYB106, MYB16 and MYB17 and nok mutant exhibits over-branched trichomes in rosette leaves. On the other hand, Arabidopsis AP2/ERF transcription factor WAX INDUCER1/SHINE1 is well known to induce cuticle development. Here, we report the transcriptional cascade of MYBs-WIN/SHNs coordinately regulates the epidermal cuticle development. The constitutive expression of MYB106 chimeric repressor, in which strong repression domain was fused with MYB106 (35S:MYB106SRDX), induced cuticle deficiency characterized by organ adhesion, reduction of epicuticular wax crystals and staining by toluidine blue in broad region of aerial parts in addition to the over-branched trichomes. Most these phenotypes were partially reproduced in T-DNA knockout plants and also similarly induced by the chimeric repressors of WIN1/SHINE1(SHN1), SHN2 and SHN3, which are AP2/ERF transcription factors previously shown as positive regulators of cutin. Microarray experiments revealed that MYB106SRDX and WIN1SRDX plants have similar transcriptomes, in which the expression of wax and cutin biosynthetic genes was suppressed. Conversely, VP16-fused MYB106 which has high activation ability induced ectopic production of cutin nanoridges in the transgenic plants and enhanced the reporter driven by promoters of WIN1 and wax-related genes in transient expression assay. These results suggest that MIXTA-like proteins regulate cutin biosynthesis partially via WIN1 and directly regulate wax accumulation as well as their known roles in epidermal cell differentiation. Transcriptomes of 35S:MYB106SRDX, 35S:WIN1SRDX and wild-type Arabidopsis seedling were compared.

ORGANISM(S): Arabidopsis thaliana

SUBMITTER: Nobuitaka Mitsuda 

PROVIDER: E-GEOD-31884 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Publications

MIXTA-like transcription factors and WAX INDUCER1/SHINE1 coordinately regulate cuticle development in Arabidopsis and Torenia fournieri.

Oshima Yoshimi Y   Shikata Masahito M   Koyama Tomotsugu T   Ohtsubo Norihiro N   Mitsuda Nobutaka N   Ohme-Takagi Masaru M  

The Plant cell 20130524 5


The waxy plant cuticle protects cells from dehydration, repels pathogen attack, and prevents organ fusion during development. The transcription factor WAX INDUCER1/SHINE1 (WIN1/SHN1) regulates the biosynthesis of waxy substances in Arabidopsis thaliana. Here, we show that the MIXTA-like MYB transcription factors MYB106 and MYB16, which regulate epidermal cell morphology, also regulate cuticle development coordinately with WIN1/SHN1 in Arabidopsis and Torenia fournieri. Expression of a MYB106 chi  ...[more]

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