...Martina Pesch; Ilka Schultheiß; Simona Digiuni; Joachim F. Uhrig; Martin Hülskamp Trichome and root hair patterning is governed by a gene regulatory network involving TTG1 and several homologous MYB and bHLH proteins. The bHLH proteins GL3 and EGL3 are core components that serve as a regulatory...

... associated with increased cell size and specialized cell shapes, but the mechanism coordinating DNA content with shape and size remains obscure. Here we identify the product of the BRANCHLESS TRICHOMES ( BLT ) gene, a protein of hitherto unknown function that has been conserved throughout angiosperm...

...Yuki Yoshida; Ryosuke Sano; Takuji Wada; Junji Takabayashi; Kiyotaka Okada Once attacked by herbivores, plants regenerate new leaves with increased trichome density as an inducible defense. Trichomes are specified from neighboring epidermal cells through local cell-cell interactions in the leaf...

...Mingzhe Zhao; Kengo Morohashi; Greg Hatlestad; Erich Grotewold; Alan Lloyd A network of three classes of proteins consisting of bHLH and MYB transcription factors, and a WD40 repeat protein, TRANSPARENT TESTA GLABRA1(TTG1), act in concert to activate trichome initiation and patterning. Using YFP...

...-type transcription factor that negatively regulates trichome formation in the inflorescence epidermis. A dominant mutant with elevated expression of TCL1 has a glabrous (trichomeless) phenotype, whereas a loss-of-function mutation in TCL1 uniquely confers ectopic trichome formation on inflorescence...

... is required to establish seedling architecture, leaf size and trichome differentiation. CAF-1 is needed to restrict branching of trichomes on rosette leaves. Increased trichome branching in CAF-1 mutants is not strictly correlated with increased nuclear DNA content. In addition, fas2 glabra3 double mutants...

... quantitatively to several functions are subject to intense purifying selection. * Author for correspondence (e-mail: [email protected] ) 4 10 2005 ©2005. 2005 Ultrabithorax Distal-less Limb Hox Evolution Peptide motif Trichome Abdominal tergite Postnotal Laterotergite Gene...

... of conical epidermal cells in petals. Transgenic experiments have indicated that MIXTA activity can also initiate trichome development, dependent on the developmental timing of its expression. MIXTA is normally expressed late in petal development and functions only in conical cell differentiation. However...

... characterized, the cellular mechanisms that control its activity and localization are not well known. The `distorted group' defines a set of Arabidopsis genes that are required to remodel the actin cytoskeleton and maintain the polarized elongation of branched, hair-like cells termed trichomes. Several loci...

...Jeffrey J. Esch; Margaret Chen; Mark Sanders; Matthew Hillestad; Sampson Ndkium; Brian Idelkope; James Neizer; M. David Marks Previously characterized Arabidopsis gl3 mutants have trichomes that are smaller, less branched and undergo fewer rounds of endoreplication than wild-type trichomes. A new...

...Jason D. Walker; David G. Oppenheimer; Joshua Concienne and; John C. Larkin ABSTRACT Cell differentiation is generally tightly coordinated with the cell cycle, typically resulting in a nondividing cell with a unique differentiated morphology. The unicellular trichomes of Arabidopsis are a well...

...Jaideep Mathur; Pius Spielhofer; Benedikt Kost; Nam-Hai Chua Arabidopsis thaliana trichomes provide an attractive model system to dissect molecular processes involved in the generation of shape and form in single cell morphogenesis in plants. We have used transgenic Arabidopsis plants carrying...

...Danlin Luo; David G. Oppenheimer We are using trichome (hair) morphogenesis as a model to study how plant cell shape is controlled. During a screen for new mutations that affect trichome branch initiation in Arabidopsis , we identified seven new mutants that show a reduction in trichome branch...

... numbers of multicellular trichomes on leaves and floral organs as well as the novel production of conical cells on leaves. These data indicate that conical cells and trichomes are produced by a common developmental pathway. The timing of MIXTA expression suggests that the choice between the cell types...

...Daniel B. Szymanski; Ross A. Jilk; Susan M. Pollock; M. David Marks ABSTRACT More than twenty genes are required for the correct initiation, spacing, and morphogenesis of trichomes in Arabidopsis . The initial selection of trichome precursors requires the activity of both the GLABROUS1 ( GL1...

...Ulrike Folkers; Jürgen Berger; Martin Hülskamp ABSTRACT Cell morphogenesis, i.e. the acquisition of a particular cell shape, can be examined genetically in the three-branched trichomes that differentiate from single epidermal cells on the leaves of Arabidopsis thaliana . In normal development...

...John C. Larkin; Nevin Young; Michael Prigge; M. David Marks ABSTRACT Arabidopsis trichomes are single-celled epidermal hairs that serve as a useful model for the study of plant cell differentiation. An examination of the distribution of trichomes early in their development revealed that developing...