Journal of Plant Research

, Volume 120, Issue 1, pp 61–70

Twisted growth and organization of cortical microtubules

  • Takashi Ishida
  • Siripong Thitamadee
  • Takashi Hashimoto
JPR Symposium

DOI: 10.1007/s10265-006-0039-y

Cite this article as:
Ishida, T., Thitamadee, S. & Hashimoto, T. J Plant Res (2007) 120: 61. doi:10.1007/s10265-006-0039-y

Abstract

In plants, directional cell expansion greatly contributes to the final shape of mature cells, and thus to organ architecture. A particularly interesting mode of cell expansion is helical growth in which the growth axis is continuously tilted either to the right or to the left as the cell grows. Fixed handedness of helical growth raises fundamental questions on the possible origin of left–right asymmetry. Twisting mutants of Arabidopsis thaliana offer unique opportunities to study the cellular basis of helical growth. Most of the twisting mutants with fixed handedness have been shown to have defects in microtubule functions, whereas mutants that twist in non-fixed directions appear to be defective in auxin response or transport. Good correlations have been found between the tilted growth direction and alignment of cortical microtubule arrays in twisting mutants with compromised microtubule functions. The present challenge is to understand how particular array patterns are organized during progression of the interphase in rapidly expanding cells. Molecular and cell biological studies on twisting mutants will lead to better understanding on how wild-type plant cells utilize the microtubule cytoskeleton to initiate and rigorously maintain straight growth.

Keywords

Helical growthMicrotubulesCell elongationArabidopsisMutants

Copyright information

© The Botanical Society of Japan and Springer 2006

Authors and Affiliations

  • Takashi Ishida
    • 1
  • Siripong Thitamadee
    • 1
  • Takashi Hashimoto
    • 1
  1. 1.Nara Institute of Science and TechnologyGraduate School of Biological SciencesNaraJapan