Regulatory factors controlling cell wall formation
Molecular Genetics of Plant Development
The shape of plant cells and ultimately the entire plant is defined by the cell wall surrounding each cell. Cell walls not only protect the plant from biotic and abiotic stresses but also determine the extent and direction of the cell expansion.
Plant cell walls are complex structures of different interwoven polysaccharides and proteins and their composition strongly depends on the developmental stage of the cell. While the biosynthesis of the different components of cell walls is quite well understood, the regulatory mechanism controlling their assembly still remains largely elusive.
Using Arabidopsis thaliana as a model system, our lab is characterizing different factors that influence cell growth and cell wall formation. On one hand, we are analyzing regulatory proteins in the cell wall that directly affect cell wall development. Alternatively, the TOR (Target of Rapamycin) pathway, a major growth controller of eukaryotes, is an intracellular growth regulator which in plants seems to influence cell wall development. Cell growth can also be influenced by plant secondary metabolites that affect cellular processes; the exact mode of action is currently being investigated. Finally, we are assessing the contribution of individual components of the cell wall to its mechanical property.
- Mutations in the Arabidopsis ROL17/isopropylmalate synthase 1 locus alter amino acid content, modify the TOR network, and suppress the root hair cell development mutant lrx1
Schaufelberger, M; Galbier, F; Herger, A; Francisco, RD; Roffler, S; Clement, G; Diet, A; Hortensteiner, S; Wicker, T; Ringli, C
JOURNAL OF EXPERIMENTAL BOTANY, 70 (8):2313-2323; SI 10.1093/jxb/ery463 APR 1 2019
- Linker histones are fine-scale chromatin architects modulating developmental decisions in Arabidopsis
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GENOME BIOLOGY, 20 (1):10.1186/s13059-019-1767-3 AUG 7 2019
- Extracellular matrix sensing by FERONIA and Leucine-Rich Repeat Extensins controls vacuolar expansion during cellular elongation in Arabidopsis thaliana
Duenser, Kai; Gupta, Shibu; Herger, Aline; Feraru, Mugurel, I; Ringli, Christoph; Kleine-Vehn, Jurgen
EMBO JOURNAL, 38 (7):10.15252/embj.2018100353 APR 1 2019
- LRX proteins play a crucial role in pollen grain and pollen tube cell wall development
Ndinyanka Fabrice T, Vogler H, Draeger C, Munglani G, Gupta S, Herger AG, Knox JP, Grossniklaus U, Ringli C
Plant Physiol https://doi.org/10.1104/pp.17.01374 (2017)
- Transmission electron microscopy imaging to analyze chromatin density distribution at the nanoscale level
Ndinyanka Fabrice T, Cherkezyan L, Ringli C, Baroux C.
Methods in Molecular Biology. Vol. 1675, 10.1007/978-1-4939-7318-7_34 (2017)
- RALF4/19 peptides interact with LRX proteins to control pollen tube growth in Arabidopsis
Mecchia, Martin A.; Santos-Fernandez, Gorka; Duss, Nadine N.; et al.
SCIENCE, 358 (6370): 1600-1603 10.1126/science.aao5467 DEC 22 2017
- Efficient preparation of Arabidopsis pollen tubes for ultrastructural analysis using chemical and cryo-fixation
Fabrice, Tohnyui Ndinyanka; Kaech, Andres; Barmettler, Gery; et al.
BMC PLANT BIOLOGY, 17: 10.1186/s12870-017-1136-x OCT 27 2017
- Flavonol-induced changes in PIN2 polarity and auxin transport in the Arabidopsis thaliana rol1-2 mutant require phosphatase activity
Kuhn, Benjamin M.; Nodzynski, Tomasz; Errafi, Sanae; et al.
SCIENTIFIC REPORTS, 7: 10.1038/srep41906 FEB 6 2017
- Characterization of size-dependent mechanical properties of tip-growing cells using a lab-on-chip deviced
Hu, Chengzhi; Munglani, Gautam; Vogler, Hannes; et al.
LAB ON A CHIP, 17 (1): 82-90, 10.1039/c6lc01145d 2017
- Cell wall development
- Root hair formation
- Pollen tube growth
- Immunological analysis of cell walls
- Plant metabolomics
- Structural identification of secondary metabolites
- Arabidopsis / yeast equivalency in growth-regulatory processes