title: Cell walls as a stage for intercellular communication regulating shoot meristem development.
abstract: Aboveground organs of plants are ultimately derived/generated from the shoot apical meristem (SAM), which is a proliferative tissue located at the apex of the stem. The SAM contains a population of stem cells that provide new cells for organ/tissue formation. The SAM is composed of distinct cell layers and zones with different properties. Primordia of lateral organs develop at the periphery of the SAM. The shoot apex is a dynamic and complex tissue, and as such intercellular communications among cells, layers and zones play significant roles in the coordination of cell proliferation, growth and differentiation to achieve elaborate morphogenesis. Recent findings have highlighted the importance of a number of signaling molecules acting in the cell wall space for the intercellular communication, including classic phytohormones and secretory peptides. Moreover, accumulating evidence has revealed that cell wall properties and their modifying enzymes modulate hormone actions. In this review, we outline how behaviors of signaling molecules and changes of cell wall properties are integrated for the shoot meristem regulation.
authors.affiliation: Institute of Transformative Bio-Molecules (WPI-ITbM), Nagoya University , Nagoya, Japan.
authors.forename: Toshiaki
authors.initials: T
authors.lastname: Tameshige
authors.affiliation: Institute of Transformative Bio-Molecules (WPI-ITbM), Nagoya University , Nagoya, Japan.
authors.forename: Yuki
authors.initials: Y
authors.lastname: Hirakawa
authors.affiliation: Institute of Transformative Bio-Molecules (WPI-ITbM), Nagoya University , Nagoya, Japan ; Department of Biology, University of Washington , Seattle, WA, USA ; Howard Hughes Medical Institute, University of Washington , Seattle, WA, USA.
authors.forename: Keiko U
authors.initials: KU
authors.lastname: Torii
authors.affiliation: Institute of Transformative Bio-Molecules (WPI-ITbM), Nagoya University , Nagoya, Japan.
authors.forename: Naoyuki
authors.initials: N
authors.lastname: Uchida
keywords: auxin; cell wall; cytokinin; intercellular communication; organ primordia; peptide hormone; physical stress; shoot apical meristem