@misc{FritzRosaSicard2018,
  author    = {Fritz, Michael Andre and Rosa, Stefanie and Sicard, Adrien},
  title     = {Mechanisms Underlying the Environmentally Induced Plasticity of Leaf Morphology},
  series = {Frontiers in genetics},
  volume    = {9},
  journal   = {Frontiers in genetics},
  publisher = {Frontiers Research Foundation},
  address   = {Lausanne},
  issn      = {1664-8021},
  doi       = {10.3389/fgene.2018.00478},
  pages     = {25},
  year      = {2018},
  abstract  = {The primary function of leaves is to provide an interface between plants and their environment for gas exchange, light exposure and thermoregulation. Leaves have, therefore a central contribution to plant fitness by allowing an efficient absorption of sunlight energy through photosynthesis to ensure an optimal growth. Their final geometry will result from a balance between the need to maximize energy uptake while minimizing the damage caused by environmental stresses. This intimate relationship between leaf and its surroundings has led to an enormous diversification in leaf forms. Leaf shape varies between species, populations, individuals or even within identical genotypes when those are subjected to different environmental conditions. For instance, the extent of leaf margin dissection has, for long, been found to inversely correlate with the mean annual temperature, such that Paleobotanists have used models based on leaf shape to predict the paleoclimate from fossil flora. Leaf growth is not only dependent on temperature but is also regulated by many other environmental factors such as light quality and intensity or ambient humidity. This raises the question of how the different signals can be integrated at the molecular level and converted into clear developmental decisions. Several recent studies have started to shed the light on the molecular mechanisms that connect the environmental sensing with organ-growth and patterning. In this review, we discuss the current knowledge on the influence of different environmental signals on leaf size and shape, their integration as well as their importance for plant adaptation.},
  language  = {en}
}
@article{BerryRosaHowardetal.2017,
  author    = {Berry, Scott and Rosa, Stefanie and Howard, Martin and Buhler, Marc and Dean, Caroline},
  title     = {Disruption of an RNA-binding hinge region abolishes LHP1-mediated epigenetic repression},
  series = {Genes \& Development},
  volume    = {31},
  journal   = {Genes \& Development},
  publisher = {Cold Spring Harbor Laboratory Press},
  address   = {Cold Spring Harbor, NY},
  issn      = {0890-9369},
  doi       = {10.1101/gad.305227.117},
  pages     = {2115 -- 2120},
  year      = {2017},
  abstract  = {Epigenetic maintenance of gene repression is essential for development. Polycomb complexes are central to this memory, but many aspects of the underlying mechanism remain unclear. LIKE HETEROCHROMATIN PROTEIN 1 (LHP1) binds Polycomb-deposited H3K27me3 and is required for repression of many Polycomb target genes in Arabidopsis. Here we show that LHP1 binds RNA in vitro through the intrinsically disordered hinge region. By independently perturbing the RNA-binding hinge region and H3K27me3 (trimethylation of histone H3 at Lys27) recognition, we found that both facilitate LHP1 localization and H3K27me3 maintenance. Disruption of the RNAbinding hinge region also prevented formation of subnuclear foci, structures potentially important for epigenetic repression.},
  language  = {en}
}
@article{IetswaartRosaWuetal.2017,
  author    = {Ietswaart, Robert and Rosa, Stefanie and Wu, Zhe and Dean, Caroline and Howard, Martin},
  title     = {Cell-Size-Dependent Transcription of FLC and Its Antisense Long Non-coding RNA COOLAIR Explain Cell-to-Cell Expression Variation},
  series = {Cell systems},
  volume    = {4},
  journal   = {Cell systems},
  publisher = {Cell Press},
  address   = {Cambridge},
  issn      = {2405-4712},
  doi       = {10.1016/j.cels.2017.05.010},
  pages     = {622 -- 635},
  year      = {2017},
  abstract  = {Single-cell quantification of transcription kinetics and variability promotes a mechanistic understanding of gene regulation. Here, using single-molecule RNA fluorescence in situ hybridization and mathematical modeling, we dissect cellular RNA dynamics for Arabidopsis FLOWERING LOCUS C (FLC). FLC expression quantitatively determines flowering time and is regulated by antisense (COOLAIR) transcription. In cells without observable COOLAIR expression, we quantify FLC transcription initiation, elongation, intron processing, and lariat degradation, as well as mRNA release from the locus and degradation. In these heterogeneously sized cells, FLC mRNA number increases linearly with cell size, resulting in a large cell-to-cell variability in transcript level. This variation is accounted for by cell-sizedependent, Poissonian FLC mRNA production, but not by large transcriptional bursts. In COOLAIRexpressing cells, however, antisense transcription increases with cell size and contributes to FLC transcription decreasing with cell size. Our analysis therefore reveals an unexpected role for antisense transcription in modulating the scaling of transcription with cell size.},
  language  = {en}
}