Regulation of Stomatal Development by Stomatal Lineage miRNAs
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ABSTRACT:
ORGANISM(S): Arabidopsis thaliana
PROVIDER: GSE140918 | GEO | 2020/02/03
REPOSITORIES: GEO
Similar Datasets
Project description:Regulation of Stomatal Development by Stomatal Lineage miRNAs
| PRJNA591466 | ENA
Project description:Plant cells are totipotent and hence can dedifferentiate and re-differentiate, making it possible to clone entire plant parts from a single cell. It is hence critical for plant cells to maintain specific cell-states during and after differentiation. Stomata, microscopic valves on the plant epidermis required for efficient gas exchange and water management, have emerged as a powerful model system for understanding how de novo lineage-specific stem cell initiate, proliferate and differentiate into specialized cell types during their development of the plant epidermis. The stomatal lineage emerged from a subpopulation of protodermal cells as meristemoid mother cells (MMCs) that undergoes an asymmetric entry division to give a rise meristemoid and its sister cell called the stomatal-lineage ground cell (SLGC). After several rounds of asymmetric cell division, meristemoids differentiate into round guard mother cells (GMC), which divide symmetrically and terminally differentiate into paired guard cells (GCs). We have adapted the INTACT (Isolation of Nuclei TAgged in Specific Cell Types) system to isolate each stomatal lineage-specific nuclei followed by ATACseq (Assay for Transposase-Accessible Chromatin). We showed that chromatin accessibility is dynamic throughout the stomatal lineage progression. Further, the analysis of TF binding sites in differentially accessible regions led to discover that combinatorial cis-regulatory elements and transcription factor circuits controls lineage specific cell state transition during stomatal development.
2022-12-28 | GSE190753 | GEO
Project description:Stomata play a fundamental role modulating the exchange of gases between plants and the atmosphere. These microscopic structures form in high numbers on the leaf epidermis and are also present on flowers. Although leaf stomata are well-studied, little attention has been paid to the development or function of floral stomata. To characterise gene expression during the stomatal development in IR64 florets, as well as to identify potential gene expression differences in florets of transgenic plants with a reduction in stomatal density, a RNA-sequencing was carried out using floret samples from different developmental stages of IR64 (control) and transgenic plants overexpressing the gene OsEPF1. Differential expression analyses conducted on the RNA-seq dataset indicate that the cellular transitions during the development of floral stomata are regulated by the same genetic network used in rice leaves, and reveal alterations in global gene expression in florets of plants overexpressing OsEPF1.
2024-01-23 | GSE196048 | GEO
Project description:Environmental factors shape the phenotypes of multicellular organisms. The production of stomata—the epidermal pores required for gas exchange in plants—is highly plastic, and provides a powerful platform to address environmental influence on cell differentiation [1-3]. Rising temperatures are already impacting plant growth, a trend expected to worsen in the near future [4]. High temperature inhibits stomatal production but the underlying mechanism is not known [5]. Here, we show that elevated temperature suppresses the expression of SPEECHLESS (SPCH), the bHLH transcription factor that serves as the master regulator of stomatal lineage initiation [6,7]. Our genetic and expression analyses indicate that the suppression of SPCH and stomatal production is mediated by the bHLH transcription factor PHYTOCHROME-INTERACTING FACTOR 4 (PIF4), a core component of high temperature signaling [8]. Importantly, we demonstrate that upon exposure to high temperature, PIF4 accumulates in the stomatal precursors and binds to the promoter of SPCH. In addition, we find SPCH feeds back negatively to the PIF4 gene. We propose a model where the high temperature-activated PIF4 binds and represses SPCH expression to restrict stomatal production at high temperature. Our work identifies a molecular link connecting high temperature signaling and stomatal development, and reveals a direct mechanism by which production of a specific cell lineage can be controlled by a broadly-expressed environmental signaling factor.
2018-04-05 | GSE110302 | GEO
Project description:We initiated a study to investigate the transcriptional profiles associated with cell states of the stomatal lineage. A stem-cell like precursor of stomata, a meristemoid. reiterates asymmetric divisions and renews itself before differentiating into guard cells. The transient and asynchronous nature of the meristemoid has made it difficult to study its molecular characteristics. Through combinatorial use of genetic resources that either arrest or constitutively drive stomatal cell-state progressions due to loss- or gain-of-function mutations in the key transcription factor genes, SPEECHLESS, MUTE, and SCRM, we obtained seedlings highly enriched in pavement cells, meristemoids, or stomata. Here we present transcriptome and genome-wide trends in gene regulation associated with each cell state and identify molecular signatures associated with meristemoids.
2011-11-08 | GSE29814 | GEO
Project description:We initiated a study to investigate the transcriptional profiles associated with cell states of the stomatal lineage. A stem-cell like precursor of stomata, a meristemoid. reiterates asymmetric divisions and renews itself before differentiating into guard cells. The transient and asynchronous nature of the meristemoid has made it difficult to study its molecular characteristics. Through combinatorial use of genetic resources that either arrest or constitutively drive stomatal cell-state progressions due to loss- or gain-of-function mutations in the key transcription factor genes, SPEECHLESS, MUTE, and SCRM, we obtained seedlings highly enriched in pavement cells, meristemoids, or stomata. Here we present transcriptome and genome-wide trends in gene regulation associated with each cell state and identify molecular signatures associated with meristemoids. 12 samples are included in this study. Three biological replicates of 5-dag seedlings of speechless, scrm-D and scrm-D;mute were compared wild type seedlings for changes in gene expression.
2011-11-08 | E-GEOD-29814 | biostudies-arrayexpress
Project description:Stomata are pores in the epidermis of plants that can open and close and allow for gas exchange vital for photosynthesis and regulate transpiration. Stomatal development is driven by a set of conserved bHLH transcription factors (SPCH, MUTE, FAMA, and their heterodimerization partners ICE1, SCRM2), that initiate and promote progression of cell fates in the stomatal lineage. Due to the shared ancestry of SPCH, MUTE and FAMA (subgroup Ia) and ICE1 and SCRM2 (subgroup IIIb) their DNA binding specificity is similar and there is some functional redundancy. However, individual bHLHs also have unique functions. For example, SPCH is required for initiation of the stomatal lineage, while FAMA is responsible for terminal differentiation of the guard cell pair. In grasses, the stomatal complex comprises the guard cell pair, and two flanking subsidiary cells. Recruitment of the latter from neighboring cell filed during development requires expression of MUTE. Remarkably, while MUTE is absolutely required for the promotion of guard mother cell fate in maize and rice, this is not the case in Brachypodium. This suggests that another TF can at least partially substitute for MUTE in this function. While different expression profiles of the bHLH dimers within the stomatal lineage may partially responsible for distinct functions of each pair, it is likely that each pair forms different transcriptional complexes and that interaction with other transcriptional regulators affects the dimer’s binding DNA binding and gene regulation properties. Given the differences in bHLH function between dicots and grasses and even within the grass family, we were interested in elucidating the protein interaction networks of the stomatal lineage regulators in Brachypodium. To this end, we performed co-immunoprecipitation coupled to LC-MS/MS of BdSPCH2-YFP, YFP-BdMUTE, YFP-BdFAMA, YFP-ICE1 and YFP-SCRM2 from the developmental zone of young B. distachyon leaves using GFP-Trap beads. All YFP-fusion proteins were expressed under the endogenous promoter in the Bd21-3 background. The only exception was BdICE1, which was expressed under the ZmUBI promoter, but was nevertheless mostly restricted to the stomatal lineage. As control lines we use the Bd21-3 wild type and a line expressing 3x YFPnls (nuclear YFP) under the MUTE promoter. Comparison of proteins enriched with the bHLH fusion proteins vs. the controls revealed overlapping and distinct putative interactors, which is in agreement with the assumption that these transcription factors have both shared and unique functions. Notably, in addition to the presumed hetero-dimerization partners, we found a number of other bHLH transcription factors that were identified with one or more of the bait proteins. This suggests the presence of a larger bHLH network acting in the stomatal lineage.
2023-03-11 | PXD035582 | Pride
Project description:We have previously identified genes that are induced by MUTE, key transcription factor for stomatal lineage fate commitment and symmetric cell division that create stomata surrounded by a pair of guard cells in Arabidopsis. To test whether these genes are indeed direct MUTE targets, we performed genome-wide MUTE ChIP-sequencing.
2022-02-12 | GSE173338 | GEO
Project description:Developmental transitions can be described in terms of morphology and individual genes expression patterns, but also in terms of global transcriptional and epigenetic changes. Most of the large-scale studies of such transitions, however, have only been possible in synchronized cell culture systems. Here we generate a cell type specific transcriptome of an adult stem-cell lineage in the Arabidopsis leaf using RNA sequencing and microarrays. RNA profiles of stomatal entry, commitment, and differentiating cells, as well as of mature stomata and the entire aerial epidermis give a comprehensive view of the developmental progression. To obtain pure cell populations corresponding to different stomatal lineage cell types we used Fluorescent Activated Cell Sorting (FACS) in combination with markers of early (SPCHp::SPCH-YFP, SSY), middle (MUTEp::nucGFP, MG), and late (FAMAp::GFP-FAMA, FGF) precursor stages, as well of mature stomata (enhancer trap E1728::GFP, E1728G) and a marker of the entire epidermis (ML1p::YFP-RCI2A, ML1Y). To minimize transcriptional differences due to age, all cell types were sorted from 14-day old aerial rosettes, and the specificity of expression pattern at this common time point confirmed via confocal microscopy. Total RNA was extracted from purified protoplasts (2,000 to 20,000 cells/replicate; 3 replicates/marker line) and transcript abundance measured using ATH1-121501 microarrays.
2015-04-06 | E-GEOD-58855 | biostudies-arrayexpress
Project description:Developmental transitions can be described in terms of morphology and individual genes expression patterns, but also in terms of global transcriptional and epigenetic changes. Most of the large-scale studies of such transitions, however, have only been possible in synchronized cell culture systems. Here we generate a cell type specific transcriptome of an adult stem-cell lineage in the Arabidopsis leaf using RNA sequencing and microarrays. RNA profiles of stomatal entry, commitment, and differentiating cells, as well as of mature stomata and the entire aerial epidermis give a comprehensive view of the developmental progression. To obtain pure cell populations corresponding to different stomatal lineage cell types we used Fluorescent Activated Cell Sorting (FACS) in combination with markers of early (SPCHp::SPCH-YFP, SSY), middle (MUTEp::nucGFP, MG), and late (FAMAp::GFP-FAMA, FGF) precursor stages, as well of mature stomata (enhancer trap E1728::GFP, E1728G) and a marker of the entire epidermis (ML1p::YFP-RCI2A, ML1Y). To minimize transcriptional differences due to age, all cell types were sorted from 10-day old aerial rosettes, and the specificity of expression pattern at this common time point confirmed via confocal microscopy. Total RNA was extracted from purified protoplasts (4,000 to 20,000 cells/replicate; 2 replicates/marker line; 3 replicates/SSY marker line) and transcript abundance measured using RNA sequencing.
2015-04-06 | E-GEOD-58856 | biostudies-arrayexpress