Auxin transport through non-hair cells sustains root-hair development

Jones, Angharad; Kramer, Eric M.; Knox, Kirsten; Swarup, Ranjan; Bennett, Malcolm J.; Lazarus, Colin M.; Leyser, Ottoline; Grierson, Claire

doi:10.1038/ncb1815

Cited by 215 publications

(198 citation statements)

References 32 publications

Supporting

Mentioning

192

Contrasting

Order By: Relevance

“…We also investigated the regulation of the RSL network by auxin, a key positive regulator of root hair development in angiosperms and the chloronema-to-caulonema transition in mosses (18,(32)(33)(34). Auxin positively regulates the expression of RSL class I genes in P. patens (24) (Fig.…”

Section: Rsl Network Controls Rootmentioning

confidence: 99%

Recruitment and remodeling of an ancient gene regulatory network during land plant evolution

Pires

Breuninger

et al. 2013

Proc. Natl. Acad. Sci. U.S.A.

127

105

View full text Add to dashboard Cite

The evolution of multicellular organisms was made possible by the evolution of underlying gene regulatory networks. In animals, the core of gene regulatory networks consists of kernels, stable subnetworks of transcription factors that are highly conserved in distantly related species. However, in plants it is not clear when and how kernels evolved. We show here that RSL (ROOT HAIR DEFECTIVE SIX-LIKE) transcription factors form an ancient land plant kernel controlling caulonema differentiation in the moss Physcomitrella patens and root hair development in the flowering plant Arabidopsis thaliana. Phylogenetic analyses suggest that RSL proteins evolved in aquatic charophyte algae or in early land plants, and have been conserved throughout land plant radiation. Genetic and transcriptional analyses in loss of function A. thaliana and P. patens mutants suggest that the transcriptional interactions in the RSL kernel were remodeled and became more hierarchical during the evolution of vascular plants. We predict that other gene regulatory networks that control development in derived groups of plants may have originated in the earliest land plants or in their ancestors, the Charophycean algae.T he development of multicellular organisms is controlled by gene regulatory networks (GRNs) and the reorganization of GRN architecture is thought to be a major factor underlying morphological evolution (1-5). GRNs are hierarchic and modular structures where four major component classes can be identified (3): at the periphery of GRNs are differentiation gene batteries encoding proteins that execute cell type-specific functions (such as building a pigmented cell); upstream of these batteries are switches that allow or prevent subcircuits to function in specific developmental contexts, and "plug-ins," small subcircuits that are flexibly and repeatedly used during development (such as signal transduction pathways); at the core of GRNs are kernels, small conserved subcircuits that execute specific developmental functions (such as defining spatial patterns in an embryo). Kernels are comprised of transcription factors that are highly conserved in distantly related species and are unusually stable components of GRNs.Ancient kernels that regulate body plan and organ development are highly conserved among diverse groups of metazoans (animals) (6-10). In contrast, the core components of plant GRNs are difficult to identify because of the dynamic nature of plant genome evolution and the plastic character of plant development. Floral homeotic genes form a relatively recent kernel controlling flower development (11). Homologs of KNOX and LEAFY transcription factors control shoot development in vascular plants and sporophyte development in mosses (12-15). KNOX/BEL genes also control the development of the diploid phase in unicellular chlorophytes (16) and the haploid-to-diploid transition in mosses (15), suggesting that KNOX and LEAFY genes may be core members of ancient GRNs that control diploid development in plants. Auxin signaling (17,18), et...

show abstract

Section: Rsl Network Controls Rootmentioning

confidence: 99%

Recruitment and remodeling of an ancient gene regulatory network during land plant evolution

Pires

Breuninger

et al. 2013

Proc. Natl. Acad. Sci. U.S.A.

127

105

View full text Add to dashboard Cite

show abstract

“…We speculate that similar processes may be at play as described in the root meristem, where GLV signaling has been shown to regulate the intracellular vesicle trafficking and PM concentration of the PIN2 auxin efflux carrier, thereby affecting the formation of auxin gradients in the root tip . Likewise, changes of auxin concentration at the core of the LR primordium (De Rybel et al, 2010) or in root hair cells (Pitts et al, 1998;Rahman et al, 2002;Jones et al, 2009) depending on GLV activity may control their respective development.…”

Section: Glv Functions and Auxin Signalingmentioning

confidence: 99%

Transcriptional and Functional Classification of the GOLVEN/ROOT GROWTH FACTOR/CLE-Like Signaling Peptides Reveals Their Role in Lateral Root and Hair Formation

et al. 2012

View full text Add to dashboard Cite

The GOLVEN (GLV)/ROOT GROWTH FACTORS/CLE-Like small signaling peptide family is encoded by 11 genes in Arabidopsis (Arabidopsis thaliana). Some of them have already been shown to control root meristem maintenance, auxin fluxes, and gravitropic responses. As a basis for the detailed analysis of their function, we determined the expression domains for each of the 11 GLV genes with promoter-reporter lines. Although they are collectively active in all examined plant parts, GLV genes have highly specific transcription patterns, generally restricted to very few cells or cell types in the root and shoot and in vegetative and reproductive tissues. GLV functions were further investigated with the comparative analysis of root phenotypes induced by gain-and loss-of-function mutants or in treatments with GLV-derived synthetic peptides. We identified functional classes that relate to the gene expression domains in the primary root and suggest that different GLV signals trigger distinct downstream pathways. Interestingly, GLV genes transcribed at the early stages of lateral root development strongly inhibited root branching when overexpressed. Furthermore, transcription patterns together with mutant phenotypes pointed to the involvement of GLV4 and GLV8 in root hair formation. Overall, our data suggest that nine GLV genes form three subgroups according to their expression and function within the root and offer a comprehensive framework to study the role of the GLV signaling peptides in plant development.

show abstract

“…It has been well described that root hair elongation results from increased auxin levels in the epidermal cells and AUX1-dependent transport through non-hair epidermal cells (Pitts et al 1998;Jones et al 2009). Ethylene has also been implied in the root hair elongation process, possibly via cross-talk with auxin (Pitts et al 1998;Kapulnik et al 2011b), because at low levels, ethylene promotes auxin biosynthesis and transport in the root (Stepanova et al 2007;Swarup et al 2007).…”

Section: Root Hair Length Is Enhanced By Strigolactonesmentioning

confidence: 99%

Strigolactones fine-tune the root system

Rasmussen

Depuydt

Goormachtig

et al. 2013

Planta

View full text Add to dashboard Cite

Strigolactones were originally discovered to be involved in parasitic weed germination, in mycorrhizal association and in the control of shoot architecture. Despite their clear role in rhizosphere signaling, comparatively less attention has been given to the belowground function of strigolactones on plant development. However, research has revealed that strigolactones play a key role in the regulation of the root system including adventitious roots, primary root length, lateral roots, root hairs and nodulation. Here, we review the recent progress regarding strigolactone regulation of the root system and the antagonism and interplay with other hormones

show abstract

Auxin transport through non-hair cells sustains root-hair development

Cited by 215 publications

References 32 publications

Recruitment and remodeling of an ancient gene regulatory network during land plant evolution

Recruitment and remodeling of an ancient gene regulatory network during land plant evolution

Transcriptional and Functional Classification of the GOLVEN/ROOT GROWTH FACTOR/CLE-Like Signaling Peptides Reveals Their Role in Lateral Root and Hair Formation

Strigolactones fine-tune the root system

Contact Info

Product

Resources

About