TITLE

Mechanisms behind the puzzle: microtubule–microfilament cross-talk in pavement cell formation

AUTHOR(S)
Kotzer, A. M.; Wasteneys, G. O.
PUB. DATE
April 2006
SOURCE
Canadian Journal of Botany;Apr2006, Vol. 84 Issue 4, p594
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Recent studies are revealing plausible mechanisms that help explain how the two major cytoskeletal systems of plant cells interact to co-ordinate morphogenesis in diffusely expanding cells. In this article, we focus on the development of pavement cells typically found in the leaf epidermis, and highlight work that provides insights into the mechanisms that generate their complex morphology. Pavement cells interdigitate with adjacent cells, forming narrow neck regions interspersed with lobe-like projections. Earlier analysis demonstrated that distinct banding of cortical microtubules and associated accumulation of cell wall material was responsible for maintaining the neck regions during expansion. More recently, it has been determined that patches of fine actin microfilaments regulate the formation of lobing regions. This zonation into microtubule-rich bands and actin patches is coordinated by the activity of Rops, small GTPases that control a wide range of signalling pathways including ones that remodel both actin microfilament and microtubule arrays. Moreover, the formation of microtubule bands and actin patches seems to be self-reinforcing. Loss of microtubule polymers by drug treatment or mutation broadens actin patch formation, apparently by enhancing Rop interactions with a positive regulator of actin polymerization. Thus, cross-talk between microtubule and actin microfilament networks is essential for coordinating and reinforcing pavement cell morphogenesis.
ACCESSION #
21886654

 

Related Articles

  • Trichome cell morphogenesis in Arabidopsis: a continuum of cellular decisions. Mathur, Jaideep // Canadian Journal of Botany;Apr2006, Vol. 84 Issue 4, p604 

    In keeping with the myriad functions carried out by plants, their component cells display an amazing diversity of shapes and sizes. How is a precise cell form achieved? In recent years, the single-celled, branched, aerial epidermal trichome of Arabidopsis thaliana L. (Heynh) has emerged as a...

  • How and Y plant microtubules branch. Cyr, Richard // Nature Cell Biology;Oct2005, Vol. 7 Issue 10, p927 

    Plant cortical microtubule arrays influence plant morphogenesis, but the nature of microtubule genesis and self-organization has long puzzled cell biologists. In this issue, Murata and coworkers provide some answers by showing that γ-tubulin nucleates new microtubules along the lengths of...

  • Pollen tube growth: coping with mechanical obstacles involves the cytoskeleton. Gossot, Olivier; Geitmann, Anja // Planta;Jun2007, Vol. 226 Issue 2, p405 

    Cellular growth and movement require both the control of direction and the physical capacity to generate forces. In animal cells directional control and growth forces are generated by the polymerization of and traction between the elements of the cytoskeleton. Whether actual forces generated by...

  • Roles of Cortical Actin Microfilament Patterning in Division Plane Orientation in Plants. Kojo, Kei H.; Higaki, Takumi; Kutsuna, Natsumaro; Yoshida, Yuya; Yasuhara, Hiroki; Hasezawa, Seiichiro // Plant & Cell Physiology;Sep2013, Vol. 54 Issue 9, p1491 

    In land plant cells, division planes are precisely predicted by the microtubule preprophase band and cortical actin microfilament pattern called the actin-depleted zone or actin microfilament twin peaks. However, the function of cortical actin microfilament patterning is not clear. In this...

  • Microtubule plus-ends reveal essential links between intracellular polarization and localized modulation of endocytosis during division-plane establishment in plant cells. Dhonukshe, Pankaj; Mathur, Jaideep; Hülskamp, Martin; Gadella Jr., Theodorus W.J. // BMC Biology;2005, Vol. 3, p11 

    Background: A key event in plant morphogenesis is the establishment of a division plane. A plant-specific microtubular preprophase band (PPB) accurately predicts the line of cell division, whereas the phragmoplast, another plant-specific array, executes cell division by maintaining this...

  • Cytoskeletal self-organization in neuromorphogenesis. Dehmelt, Leif // BioArchitecture;Mar/Apr2014, Vol. 4 Issue 2, p75 

    The authors explains the concept of cytoskeletal self-organization in neuromorphogenesis. He discusses the microtubule-based mechanisms that promote cell protusion, along with the role of microtubules in early neuromorphogenesis. He also describes the cellular mechanisms of microtubule...

  • In Vitro Organogenesis of Colocasia esculenta cv. antiquorum L. Jahangir Hossain, Md. // American Journal of Plant Sciences;Jun2012, Vol. 3 Issue 6, p709 

    In vitro organogenesis of an upland species of Colocasia esculenta cv. antiquorum L. was examined in relation to different explants like meristem and parenchymatous storage tissues with or without anthocyanin layer, four levels of each of Kn, 2,4-D, NAA and BAP and four incubation environments...

  • Overexpression of a Profilin (GhPFN2) Promotes the Progression of Developmental Phases in Cotton Fibers. Juan Wang; Hai-Yun Wang; Pi-Ming Zhao; Li-Bo Han; Gai-Li Jiao; Yi-Yan Zheng; Shan-Jin Huang; Gui-Xian Xia // Plant & Cell Physiology;Aug2010, Vol. 51 Issue 8, p1276 

    Cotton fiber development at the stages of elongation and secondary wall synthesis determines the traits of fiber length and strength. To date, the mechanisms controlling the progression of these two phases remain elusive. In this work, the function of a fiber-preferential actin-binding protein...

  • MEETINGS.  // BioScience;May1965, Vol. 15 Issue 5, p370 

    The article presents information on several meetings related to life science in the U.S. The 18th annual meeting of the Gerontological Society will be held in Los Angeles, California to be held on November 11-13, 1965. The International Federation for Documentation's meeting will be held on...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics