Arabidopsis Trichome Morphogenesis and the Role of Microtubules in Controlling Trichome Branch Formation

M. David Marks

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

Trichomes are hairs that form on the surface of most land plants. Depending on the plant species trichomes can be multicellular or unicellular, longor short-lived, and either glandular. Trichomes mainly function as defensive structures that can protect plants from both biotic and abiotic stresses. This chapter focuses on the role of microtubules in controlling the formation of branches on Arabidopsis trichomes. Direct implication of MTs in trichome branch formation stems from studies of the subunits of MTs, which are composed of heterodimers of alpha and beta tubulin subunits. In Arabidopsis these subunits are encoded by multigene families; dominant mutations in two alpha tubulin genes have been shown to alter MT dynamics, resulting in a reduction in trichome branching. Structural analyses suggest that dynamic cortical MTs can form concentric arrays of MTs at trichome branch foci.

Original languageEnglish (US)
Title of host publicationPlant Cell Wall Patterning and Cell Shape
PublisherWiley-Blackwell
Pages269-285
Number of pages17
ISBN (Electronic)9781118647363
ISBN (Print)9781118647370
DOIs
StatePublished - Dec 3 2014

Keywords

  • Arabidopsis Trichome Morphogenesis
  • Microtubules (MT) dynamics

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