The Root Apex of Arabidopsis thaliana Consists of Four Distinct Zones of Growth Activities
- J. Verbelen, Tinne De Cnodder, J. Le, K. Vissenberg, F. Baluška
- Environmental SciencePlant Signalling & Behavior
- 1 November 2006
In the growing apex of Arabidopsis thaliana primary roots, cells proceed through four distinct phases of cellular activities. These zones and their boundaries can be well defined based on their…
Root gravitropism is regulated by a transient lateral auxin gradient controlled by a tipping-point mechanism
- L. Band, D. Wells, M. Bennett
- Environmental ScienceProceedings of the National Academy of Sciences
- 5 March 2012
This work used an Aux/IAA-based reporter, domain II (DII)-VENUS, in conjunction with a mathematical model to quantify auxin redistribution following a gravity stimulus and revealed that auxin is rapidly redistributed to the lower side of the root within minutes of a 90° gravity stimulus.
Dioxygenase-encoding AtDAO1 gene controls IAA oxidation and homeostasis in Arabidopsis
- Silvana Porco, A. Pěnčík, K. Ljung
- Environmental ScienceProceedings of the National Academy of Sciences
- 20 September 2016
It is concluded that the AtDAO1 gene plays a key role regulating auxin homeostasis in Arabidopsis, acting in concert with GH3 genes, to maintain auxin concentration at optimal levels for plant growth and development.
In Vivo Colocalization of Xyloglucan Endotransglycosylase Activity and Its Donor Substrate in the Elongation Zone of Arabidopsis Roots
- K. Vissenberg, Immaculada M. Martinez-Vilchez, J. Verbelen, Janice G. Miller, S. Fry
- BiologyThe Plant Cell
- 1 July 2000
A characteristic distribution pattern was found in Arabidopsis and tobacco roots: in both species, fluorescence was most prominent in the cell elongation zone of the root.
Colonization strategy of Campylobacter jejuni results in persistent infection of the chicken gut.
- K. van Deun, F. Pasmans, F. Haesebrouck
- BiologyVeterinary Microbiology
- 25 August 2008
XET activity is found near sites of growth and cell elongation in bryophytes and some green algae: new insights into the evolution of primary cell wall elongation.
- V. V. Van Sandt, H. Stieperaere, Y. Guisez, J. Verbelen, K. Vissenberg
- Environmental ScienceAnnals of Botany
- 2007
XET activity was shown to be present in all major groups of green plants and suggest that an XET-related growth mechanism originated before the evolutionary divergence of the Chlorobionta and open new insights in the evolution of the mechanisms of primary cell wall expansion.
Infection of Chinese cabbage by Plasmodiophora brassicae leads to a stimulation of plant growth: impacts on cell wall metabolism and hormone balance.
- S. Devos, K. Vissenberg, J. Verbelen, E. Prinsen
- Biology, MedicineNew Phytologist
- 20 December 2004
When the first secondary plasmodia are formed, thirteen days after infection (DAI), can be considered a switch point in phytohormone metabolism, resulting in a reduction in the active cytokinin pool and a lower indole-3-acetic acid content in the infected plants.
Xyloglucan endotransglucosylase activity loosens a plant cell wall.
- V. V. Van Sandt, D. Suslov, J. Verbelen, K. Vissenberg
- BiologyAnnals of Botany
- 1 December 2007
Fluorescent xyloglucan endotransglucosylase (XET) assays demonstrate that exogeneous XTH can act on isolated onion epidermis cell walls, and provides evidence that XTHs can act as cell wall-loosening enzymes.
Apoplastic Alkalinization Is Instrumental for the Inhibition of Cell Elongation in the Arabidopsis Root by the Ethylene Precursor 1-Aminocyclopropane-1-Carboxylic Acid1[W][OA]
- M. Staal, T. De Cnodder, K. Vissenberg
- Environmental SciencePlant Physiology
- 31 January 2011
Microelectrode ion flux estimation experiments with auxin mutants lead to the final conclusion that control of the activity state of plasma membrane H+-ATPases is one of the mechanisms by which ethylene, via auxin, affects the final cell length in the root.
Root hair initiation is coupled to a highly localized increase of xyloglucan endotransglycosylase action in Arabidopsis roots.
- K. Vissenberg, S. Fry, J. Verbelen
- Environmental SciencePlant Physiology
- 1 November 2001
Experiments in which root hair initiation was modulated and observations on root hair mutants support this view, and the temporal and spatial pattern of action as the specific pH dependence suggest that different isoforms of XET act in different processes of root development.
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