QUICK SEARCH:   [advanced] Author: Keyword(s):
Home     Help     Feedback     Subscriptions     Archive     Search     Table of Contents

First published online February 20, 2009

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Related articles in Development Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Search for Related Content Social Bookmarking                         What's this?

How plant defence gets hairy

Many plant species respond to damage from herbivore grazing by generating leaves with more trichomes (hair-like epidermal cells). Interestingly, damage at mature leaves affects newly forming leaf primordia and increases the frequency with which epidermal cells adopt a trichome fate. What controls this fate choice systemically? The answer, report Kiyotaka Okada and co-workers on p. 1039, is the plant hormone jasmonic acid. In Arabidopsis mutants that lack endogenous jasmonate (JA) signalling, trichome formation is normal, but the trichome patterning wounding response is absent. The authors isolate two additional wounding response mutants, unarmed 9 (urm9) and urm23 (which is allelic to ttg1). In both mutants, the subnuclear localisation of the bHLH transcription factor GLABRA3 (GL3), a component of the Myb-bHLH-WD40 complex that regulates trichome development, is disrupted. In addition, JA treatment enhances GL3 expression prior to trichome initiation in both wild-type and urm9 backgrounds. Based on these and other results, the authors propose that the activation of GL3 by JAs constitutes the link between the wounding response and trichome patterning in Arabidopsis.

CiteULike    Complore    Connotea    Del.icio.us    Digg    Reddit    Technorati    Twitter    What's this?

Related articles in Development:

Jasmonic acid control of GLABRA3 links inducible defense and trichome patterning in Arabidopsis

Yuki Yoshida, Ryosuke Sano, Takuji Wada, Junji Takabayashi, and Kiyotaka Okada
Development 2009 136: 1039-1048. [Abstract] [Full Text]  

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Related articles in Development Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Search for Related Content Social Bookmarking                         What's this?