Cell-wall microdomain remodeling controls crucial developmental processes

Plant cell walls display cellular and subcellular specificities. At the subcellular level, wall regional territories with specific compositions are necessary for mac-roscopic developmental processes. These regional specificities were named dif-ferently throughout the years, and are unified here under the term 'cell-wall microdomains' that define the local composition and organization of wall poly-mers underlying territories of wall loosening and/or softening or stiffening. We re-view the occurrence and developmental role of wall microdomains in different cell types. We primarily focus on the contribution of two categories of wall -remodeling molecular actors: fine-tuning of homogalacturonan (HG; pectin) demethylesterification patterns and two classes of oxidoreductases [class III peroxidases (CIII PRXs) and laccases (LACs)], but we also highlight two different molecular scaffolds recently identified for positioning specific CIII PRXs.

Automated summary

Plant cell walls show cellular and subcellular specificities, and wall microdomains play a crucial role in macroscopic developmental processes. This study focuses on the contribution of two categories of wall-remodeling molecular actors in wall microdomains.