Root Hairs pp 85-102 | Cite as

Plant Cell Wall Biogenesis During Tip Growth in Root Hair Cells

  • E. NielsenEmail author
Part of the Plant Cell Monographs book series (CELLMONO, volume 12)


In plants, cells are surrounded by a rigid cell wall, which restricts changes in cell shape and size; therefore, polarized secretion and deposition of cell wall components take on a particular importance during plant growth and development. In recent years, significant advances have been made in discovering and characterizing enzymes and proteins involved in the synthesis of many of the main cell wall polysaccharides. However, despite these advances little is known of the membrane-trafficking pathways responsible for polarized secretion in plants, and how the specific delivery of cell wall components to regions of cell expansion is controlled. In root hair cells, the majority of new cell wall deposition occurs in a highly polarized manner at the expanding tips of these cells. Additionally, reinforcement of the cell wall and deposition of secondary cell wall components occur selectively in the more distal portions of the root hair cell. In this chapter we will discuss some of the major classes of polysaccharides and structural proteins that are found in plant cell walls and relevant evidence for their selective deposition and function during plant cell wall biogenesis during root hair tip growth.


Root Hair Cell Wall Component Secondary Cell Wall Cellulose Microfibril Pectic Polysaccharide 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.



I thank David Cavalier, Oliver Lerouxel, and Ken Keegstra for sharing their unpublished results, and Byung-Ho Kang for providing the immunoelectron micrograph of RabA4b-labeled secretory vesicles containing cargo recognized by the CCCRC-M1 antibodies. This work was supported by a Department of Energy grant DE-FG02–03ER15412.


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© Springer-Verlag Berlin Heidelberg 2009

Authors and Affiliations

  1. 1.Department of Molecular, Cellular, and Developmental BiologyUniversity of MichiganAnn ArborUSA

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