The CURLY LEAF Interacting Protein BLISTER Controls Expression of Polycomb-Group Target Genes and Cellular Differentiation of<i>Arabidopsis thaliana</i>

Schatlowski, Nicole; Stahl, Yvonne; Hohenstatt, Mareike L.; Goodrich, Justin; Schubert, Daniel

doi:10.1105/tpc.109.073403

Cited by 51 publications

(51 citation statements)

References 77 publications

(103 reference statements)

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“…One concern with transcript profiling experiments in lhp1 , clf and other mutants with pleiotropic phenotypes is the confounding effect of secondary transcriptional changes. Because the pleiotropic phenotype of clf is mostly suppressed under short‐day photoperiods (SD) (Schatlowski et al , 2010), the experiment was carried out in SD. The pleiotropic phenotype of lhp1 is less repressed by SD but greatly depends on FT (Kotake et al , 2003).…”

Section: Resultsmentioning

confidence: 99%

Arabidopsis MSI1 connects LHP1 to PRC2 complexes

Derkacheva

Steinbach

Wildhaber

et al. 2013

EMBO J

209

210

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Polycomb group (PcG) proteins form essential epigenetic memory systems for controlling gene expression during development in plants and animals. However, the mechanism of plant PcG protein functions remains poorly understood. Here, we probed the composition and function of plant Polycomb repressive complex 2 (PRC2). This work established the fact that all known plant PRC2 complexes contain MSI1, a homologue of Drosophila p55. While p55 is not essential for the in vitro enzymatic activity of PRC2, plant MSI1 was required for the functions of the EMBRYONIC FLOWER and the VERNALIZATION PRC2 complexes including trimethylation of histone H3 Lys27 (H3K27) at the target chromatin, as well as gene repression and establishment of competence to flower. We found that MSI1 serves to link PRC2 to LIKE HETEROCHROMATIN PROTEIN 1 (LHP1), a protein that binds H3K27me3 in vitro and in vivo and is required for a functional plant PcG system. The LHP1-MSI1 interaction forms a positive feedback loop to recruit PRC2 to chromatin that carries H3K27me3. Consequently, this can provide a mechanism for the faithful inheritance of local epigenetic information through replication.

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Section: Resultsmentioning

confidence: 99%

Arabidopsis MSI1 connects LHP1 to PRC2 complexes

Derkacheva

Steinbach

Wildhaber

et al. 2013

EMBO J

209

210

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“…Moreover, Wolffia is also missing TOPLESS-related 2 (TPL2), which through chromatinmediated repression specifies where stem cell daughters will exit stem cell fate in Arabidopsis (Pi et al 2015). In addition, Wolffia is missing genes associated with stem cell fate (BLISTER, FEZ) (Schatlowski et al 2010;Willemsen et al 2008), mediator complex (MED3, MED9, MED33) (Mathur et al 2011), and gravitropism (LAZY1) (Yoshihara and Spalding 2017), which together are consistent with modified signaling and transcriptional cascades for a rootless, organless plant. Since Wolffia does not contain roots, the lack of genes specifying root growth and development provides a compelling reason why these BUSCO genes are missing.…”

Section: Comparative Busco Analysis Reveals Genes Missing In Wolffiamentioning

confidence: 73%

Genome and time-of-day transcriptome ofWolffia australianalink morphological extreme minimization with un-gated plant growth

Michael

Ernst

Hartwick

et al. 2020

Preprint

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Wolffia is the fastest growing plant genus on Earth with a recorded doubling time of less than a day. Wolffia has a dramatically reduced body plan, primarily growing through a continuous, budding-type asexual reproduction with no obvious phase transition. Most plants are bound by the 24-hour light-dark cycle with the majority of processes such as gene expression partitioned or phased to a specific time-of-day (TOD). However, the role that TOD information and the circadian clock plays in facilitating the growth of a fast-growing plant is unknown. Here we generated draft reference genomes for Wolffia australiana (Benth.) Hartog & Plas to monitor gene expression over a two-day time course under light-dark cycles. Wolffia australiana has the smallest genome size in the genus at 357 Mb and has a dramatically reduced gene set at 15,312 with a specific loss of root (WOX5), vascular (CASP), circadian (TOC1), and light-signaling (NPH3) genes. Remarkably, it has also lost all but one of the NLR genes that are known to be involved in innate immunity. In addition, only 13% of its genes cycle, which is far less than in other plants, with an overrepresentation of genes associated with carbon processing and chloroplast-related functions. Despite having a focused set of cycling genes, TOD cis-elements are conserved in W. australiana, consistent with the overall conservation of transcriptional networks. In contrast to the model plants Arabidopsis thaliana and Oryza sativa, the reduction in cycling genes correlates with fewer pathways under TOD control in Wolffia, which could reflect a release of functional gating. Since TOD networks and the circadian clock work to gate activities to specific times of day, this minimization of regulation may enable Wolffia to grow continuously with optimal economy. Wolffia is an ideal model to study the transcriptional control of growth and the findings presented here could serve as a template for plant improvement.

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“…A few other factors have been proposed to associate with PRC2 and to affect the catalysis of H3K27me3. These include AtUBP26, which probably deubiquitinates H2B at certain PRC2 target loci in the seed to enable trimethylation of H3K27 [44], and the plant-specific protein BLISTER (BLI), which interacts with CLF and represses a subset of PcG target genes [45].…”

Section: The Efficiency and Specificity Of Prc2 Depends On Higher Ordmentioning

confidence: 99%

Dynamic regulation of Polycomb group activity during plant development

Bemer

Grossniklaus

2012

Current Opinion in Plant Biology

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Polycomb group (PcG) complexes play important roles in phase transitions and cell fate determination in plants and animals, by epigenetically repressing sets of genes that promote either proliferation or differentiation. The continuous differentiation of new organs in plants, such as leaves or flowers, requires a highly dynamic PcG function, which can be induced, modulated, or repressed when necessary. In this review, we discuss the recent advance in understanding PcG function in plants and focus on the diverse molecular mechanisms that have been described to regulate and counteract PcG activity in Arabidopsis.

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The CURLY LEAF Interacting Protein BLISTER Controls Expression of Polycomb-Group Target Genes and Cellular Differentiation ofArabidopsis thaliana

Cited by 51 publications

References 77 publications

Arabidopsis MSI1 connects LHP1 to PRC2 complexes

Arabidopsis MSI1 connects LHP1 to PRC2 complexes

Genome and time-of-day transcriptome ofWolffia australianalink morphological extreme minimization with un-gated plant growth

Dynamic regulation of Polycomb group activity during plant development

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