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The Wall of the Growing Plant Cell: Its Three-Dimensional Organization

International Review of Cytology, ISSN: 0074-7696, Vol: 61, Issue: C, Page: 129-166
1979
  • 84
    Citations
  • 0
    Usage
  • 4
    Captures
  • 0
    Mentions
  • 0
    Social Media
Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    84
    • Citation Indexes
      84
  • Captures
    4

Article Description

This chapter summarizes successive steps involved in the formation of a growing cell wall: (1) polymerization and release of wall subunits, (2) three-dimensional assembly of the subunits in the periplasm; positioning, and cross-linking of subunits probably involving self-assembly or transmembrane control, and (3) anisotropic surface expansion of the wall implying selective loosening and sliding of the subunits when the wall is under stress. The two cellular pathways necessary for growth are (1) the exocytic route, which contributes to plasmalemma enlargement and produces the subunits of the wall and (2) the endocytic route, which contributes to tonoplast enlargement and turgor pressure regulation. In this dichotomic flow, the endoplasmic reticulum and the Golgi body play a key role. Thus, the main elements of growth regulation and wall morphogenesis, though acting at different levels in the cell, should result in a homogeneous sequential process. In the future, closer cooperation among cytologists, biochemists, and physiologists seems highly desirable for a better understanding of the characteristic modalities of plant growth.

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