Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 347717
Title Actin organization during Eucalyptus root hair development and its response to fungal hypaphorine
Author(s) Dauphin, A.; Ruijter, N.C.A. de; Emons, A.M.C.; Legué, V.
Source Plant Biology 8 (2006)2. - ISSN 1435-8603 - p. 204 - 211.
DOI https://doi.org/10.1055/s-2006-923767
Department(s) Laboratory of Cell Biology
EPS-1
Publication type Refereed Article in a scientific journal
Publication year 2006
Keyword(s) pisolithus-tinctorius - tip growth - f-actin - lipochito-oligosaccharide - arabidopsis-thaliana - nodulation factors - plant development - cell expansion - vicia-sativa - cytoskeleton
Abstract The fungus Pisolithus microcarpus establishes an ectomycorrhiza with Eucalyptus globulus. This symbiosis involves a fungal synthesis and secretion of hypaphorine, an indolic compound. Previous studies have shown that hypaphorine induces an alteration in the actin cytoskeleton of elongating root hairs and inhibits hair elongation. Using an alternative approved method, we analyzed the effects of hypaphorine on the E. globulus root hair cyto-architecture and actin configuration in more detail and provide new results. One mM hypaphorine stops root hair elongation within 20 min, and changes the hair cyto-architecture. Semi-quantitative analysis of the actin cytoskeleton before and after treatment with hypaphorine shows that hypaphorine induces a shift from fine F-actin to F-actin bundles in the sub-apex of the hair, which occurs first in the mid-plane of the cell. This creates a sub-apical cell centre free of filamentous actin, an actin configuration that differs from that during developmental growth arrest. The mechanism of action of hypaphorine is discussed
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