Abstract
Legume nodule organogenesis is initiated by local dedifferentiation of the root cortex. Nod factors initiate this mitotic reactivation in a spatially controlled manner (Van Brussel et al., 1992; Vijn et al., 1993). In most temperature legumes like pea and alfalfa, cell division is induced in the inner cortex opposite proto-xylem points (Libbenga and Harkes, 1973; Newcomb et al., 1979). Although the mode of action of Nod factors remains unresolved several studies suggest that these compounds probably establish a local change of the auxin/cytokinin ratio resulting in induction of cell division in the root cortex (Allen et al., 1953; Hirsch et al., 1989; Cooper and Long, 1994). In these dividing cortical cells, ENOD40 is induced by Nod factors (Vijn et al., 1993; Yang et al., 1993). We were interested whether the expression of ENOD40 is involved in the initiation of cortical cell division and investigated whether it is involved in establishing a change in phytohormone concentration of sensitivity as an early step in nodule formation.
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© 1997 Springer-Verlag Berlin Heidelberg
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Yang, W.C. et al. (1997). ENOD40 expression precedes cell division and affects phytohormone perception at the onset of nodulation. In: Legocki, A., Bothe, H., Pühler, A. (eds) Biological Fixation of Nitrogen for Ecology and Sustainable Agriculture. NATO ASI Series, vol 39. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-59112-9_10
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DOI: https://doi.org/10.1007/978-3-642-59112-9_10
Publisher Name: Springer, Berlin, Heidelberg
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