Getting physical: invasive growth events during plant development. (December 2018)

• Record Type: Journal Article
• Authors: Marsollier, Anne-Charlotte; Ingram, Gwyneth
• Is Part Of: Current opinion in plant biology. Volume 46(2018)
• Page Start: 8
• Page End: 17
• Publication Date: 2018-12
• Subjects: Plant molecular biology -- Periodicals; 571.205
• DOI: 10.1016/j.pbi.2018.06.002
• Languages: English
• ISSNs: 1369-5266

Abstract

Highlights: Invasive growth events are a key component of plant development and reproduction. Invasion involves "breaching" of one tissue by a second, actively growing, "invader". Invasion depends on a balance between the growth potential of the invader and the physical properties of the invaded tissue. Both active turgor pressure regulation and controlled remodelling of cell walls affect growth potential. Cell death in invaded tissues may be another common feature of invasive growth events in plants. Abstract : Plant cells are enclosed in cell walls that weld them together, meaning that cells rarely change neighbours. Nonetheless, invasive growth events play critical roles in plant development and are often key hubs for the integration of environmental and/or developmental signalling. Here we review cellular processes involved in three such events: lateral root emergence, pollen tube growth through stigma and style tissues, and embryo expansion through the endosperm (Figures 1–3). We consider processes such as regulation of water fluxes and cell turgor (driving growth), cell wall modifications (e.g. cell separation) and cell death (for creating space) within these three contexts with the aim of identifying key mechanisms implicated in providing a chemical and biophysical environments permitting invasive growth events.