Transcriptional induction of cell wall remodelling genes is coupled to microtubule-driven growth isotropy at the shoot apex in Arabidopsis. Armezzani, A., Abad, U., Ali, O., Robin, A. A., Vachez, L., Larrieu, A., Mellerowicz, E. J., Taconnat, L., Battu, V., Stanislas, T., Liu, M., Vernoux, T., Traas, J., & Sassi, M. Development, January, 2018.
Transcriptional induction of cell wall remodelling genes is coupled to microtubule-driven growth isotropy at the shoot apex in Arabidopsis [link]Paper  doi  abstract   bibtex   
The shoot apical meristem of higher plants continuously generates new tissues and organs through complex changes in growth rates and directions of its individual cells. Cell growth, driven by turgor pressure, largely depends on the cell walls, which allow cell expansion through synthesis and structural changes. A previous study revealed a major contribution of wall isotropy in organ emergence, through the disorganization of cortical microtubules. We show here that this disorganization is coupled with the transcriptional control of genes involved in wall remodelling. Some of these genes are induced when microtubules are disorganized and cells shift to isotropic growth. Mechanical modelling shows that this coupling has the potential to compensate for reduced cell expansion rates induced by the shift to isotropic growth. Reciprocally, cell wall loosening induced by different treatments or altered cell wall composition promotes a disruption of microtubule alignment. Our data thus indicate the existence of a regulatory module activated during organ outgrowth, linking microtubule arrangements to cell wall remodelling.
@article{armezzani_transcriptional_2018,
	title = {Transcriptional induction of cell wall remodelling genes is coupled to microtubule-driven growth isotropy at the shoot apex in {Arabidopsis}},
	issn = {1477-9129, 0950-1991},
	url = {https://journals.biologists.com/dev/article/doi/10.1242/dev.162255/264733/Transcriptional-induction-of-cell-wall-remodelling},
	doi = {10/gdhnxm},
	abstract = {The shoot apical meristem of higher plants continuously generates new tissues and organs through complex changes in growth rates and directions of its individual cells. Cell growth, driven by turgor pressure, largely depends on the cell walls, which allow cell expansion through synthesis and structural changes. A previous study revealed a major contribution of wall isotropy in organ emergence, through the disorganization of cortical microtubules. We show here that this disorganization is coupled with the transcriptional control of genes involved in wall remodelling. Some of these genes are induced when microtubules are disorganized and cells shift to isotropic growth. Mechanical modelling shows that this coupling has the potential to compensate for reduced cell expansion rates induced by the shift to isotropic growth. Reciprocally, cell wall loosening induced by different treatments or altered cell wall composition promotes a disruption of microtubule alignment. Our data thus indicate the existence of a regulatory module activated during organ outgrowth, linking microtubule arrangements to cell wall remodelling.},
	language = {en},
	urldate = {2021-06-07},
	journal = {Development},
	author = {Armezzani, Alessia and Abad, Ursula and Ali, Olivier and Robin, Amélie Andres and Vachez, Laetitia and Larrieu, Antoine and Mellerowicz, Ewa J. and Taconnat, Ludivine and Battu, Virginie and Stanislas, Thomas and Liu, Mengying and Vernoux, Teva and Traas, Jan and Sassi, Massimiliano},
	month = jan,
	year = {2018},
	pages = {dev.162255},
}

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