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Rhizobium Nod Factors Induce an Increase in Sub-apical Fine Bundles of Actin Filaments in Vicia sativa Root Hairs within Minutes

September 1999 , Volume 12 , Number  9
Pages  829 - 832

Norbert C. A. de Ruijter , 1 Ton Bisseling , 2 and Anne Mie C. Emons 1

1Laboratory of Plant Cytology and Morphology, Wageningen University, Arboretumlaan 4, 6703 BD, Wageningen, The Netherlands; 2Laboratory of Molecular Biology, Wageningen University, Dreijenlaan 3, 6703 HA, Wageningen, The Netherlands

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Accepted 11 May 1999.

We studied the response of the actin cytoskeleton in vetch root hairs after application of host-specific Nod factor. Within 3 to 15 min, the number of sub-apical fine bundles of actin filaments (FB-actin) increased in all developmental stages. Tip growth resumed only in hairs in which the FB-actin density and the length of the region with FB-actin exceeded a minimal value.

© 1999 The American Phytopathological Society