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…
Plant mitochondria move on F-actin, but their positioning in the cortical cytoplasm depends on both F-actin and microtubules.
- K. van Gestel, R. H. Köhler, J. Verbelen
- BiologyJournal of Experimental Botany
- 1 April 2002
Mitochondrion movement and positioning was studied in elongating cultured cells of tobacco, containing mitochondria-localized green fluorescent protein, in the cortical cytoplasm of elongated cells, where the mitochondria parked themselves into conspicuous parallel arrays transverse or oblique to the cell axis.
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.
Cell Elongation and Microtubule Behavior in the Arabidopsis Hypocotyl: Responses to Ethylene and Auxin
- J. Le, F. Vandenbussche, Tinne De Cnodder, D. Straeten, J. Verbelen
- Environmental ScienceJournal of Plant Growth Regulation
- 31 October 2005
It is shown that the ethylene precursor 1-aminocyclopropane-1-carboxylic acid (ACC) is known to stimulate hypocotyl elongation in the light, but this stimulation only occurs in cells of the apical half of the hypocrotyl, and ACC application can partially overcome light inhibition, whereas indole-3-acetic acid (IAA) cannot.
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.
In the early response of Arabidopsis roots to ethylene, cell elongation is up- and down-regulated and uncoupled from differentiation.
- J. Le, F. Vandenbussche, D. Van Der Straeten, J. Verbelen
- Environmental SciencePlant Physiology
- 1 February 2001
Slight changes in the concentration of ethylene in the environment modulate the elongation of target cells in the root epidermis of Arabidopsis. The response is immediate, concentration dependent,…
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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