Reactive oxygen species produced by NADPH oxidase regulate plant cell growth
- J. Foreman, V. Demidchik, L. Dolan
- Biology, Environmental ScienceNature
- 27 March 2003
It is shown here that RHD2 is an NADPH oxidase, a protein that transfers electrons from NADPH to an electron acceptor leading to the formation of reactive oxygen species (ROS) and that ROS accumulate in growing wild-type (WT) root hairs but their levels are markedly decreased in rhd2 mutants.
Cellular organisation of the Arabidopsis thaliana root.
- L. Dolan, K. Janmaat, B. Scheres
- Environmental ScienceDevelopment
- 1 September 1993
The anatomy of the developing root of Arabidopsis is described using conventional histological techniques, scanning and transmission electron microscopy and a model of meristem activity is proposed, which underpins future work on the developmental genetics of root morphogenesis.
A basic helix-loop-helix transcription factor controls cell growth and size in root hairs
- Keke Yi, B. Menand, Elizabeth M. Bell, L. Dolan
- Environmental Science, BiologyNature Genetics
- 1 March 2010
The discovery of a basic helix-loop-helix (bHLH) transcription factor called RSL4 that is sufficient to promote postmitotic cell growth in Arabidopsis thaliana root-hair cells is reported.
Origin and Diversification of Basic-Helix-Loop-Helix Proteins in Plants
Much of the diversity of plant bHLH proteins was established in early land plants, over 440 million years ago, according to whole-genome sequences from nine species of land plants and algae.
Local Positive Feedback Regulation Determines Cell Shape in Root Hair Cells
- S. Takeda, Catherine Gapper, H. Kaya, Elizabeth M. Bell, K. Kuchitsu, L. Dolan
- Biology, Environmental ScienceScience
- 29 February 2008
This work found that Ca2+, in turn, activated the RHD2 NADPH oxidase to produce ROS at the growing point in the root hair.
Ethylene is a positive regulator of root hair development in Arabidopsis thaliana.
- M. Tanimoto, K. Roberts, L. Dolan
- Environmental ScienceThe Plant Journal
- 1 December 1995
A model is proposed in which either ethylene or ACC is a signal involved in specifying the pattern of cell differentiation in the Arabidopsis root epidermis.
A RhoGDP dissociation inhibitor spatially regulates growth in root hair cells
- Rachel J. Carol, S. Takeda, L. Dolan
- Biology, Environmental ScienceNature
- 15 December 2005
It is proposed that the spatial organization of growth in plant cells requires the local RhoGDI-regulated activation of the RHD2/AtrbohC NADPH oxidase, which is required for hair growth.
An Ancient Mechanism Controls the Development of Cells with a Rooting Function in Land Plants
The phylogeny of land plants supports the hypothesis that early land plants were bryophyte-like and possessed a dominant gametophyte and later the sporophyte rose to dominance, and the data suggest that the increase in morphological complexity of the sporphyte body in the Paleozoic resulted at least in part from the recruitment of regulatory genes from gamete to sporophytes.
Clonal relationships and cell patterning in the root epidermis of Arabidopsis
- L. Dolan, C. M. Duckett, K. Roberts
- Environmental Science, Biology
- 1 September 1994
Ectopic hairs are present in the ctr1 root epidermis suggesting that a Raf protein kinase may play a role in pattern formation/differentiation in theroot epider Mis and that ethylene may be a diffusible signal involved in specifying pattern in the root epidersmis.
Oxylipins Produced by the 9-Lipoxygenase Pathway in Arabidopsis Regulate Lateral Root Development and Defense Responses through a Specific Signaling Cascade[W]
- Tamara Vellosillo, Marta Martínez, C. Castresana
- BiologyThe Plant Cell Online
- 1 March 2007
Findings that noxy2 displayed altered root development, enhanced susceptibility to Pseudomonas, and reduced the activation of 9-HOT–responding genes are consistent with mechanistic links among these processes and suggests that oxylipins from the 9-LOX pathway function in cell wall modifications required for lateral root development and pathogen arrest.
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