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Annals of Botany 87: 709-718, 2001
© 2001 Annals of Botany Company

REVIEW

Dissecting Symbiosis: Developments in Nod Factor Signal Transduction

Giles E.D. Oldroyd+

Howard Hughes Medical Institute, Department of Biological Sciences, Stanford University, Stanford, CA 94305-5020, USA

Received: 15 December 2000 ; Returned for revision: 31 January 2001 . Accepted: 12 February 2001

The interaction between legumes and rhizobial bacteria results in the formation of a unique organ, the nodule, on roots of the host plant. The nodule has evolved to harbour the bacterial symbiont and provide conditions appropriate for the fixation of atmospheric nitrogen. Nod factor, generated by rhizobia, is sufficient to activate many of the responses involved in the initiation of nodule development in the plant. Dissecting the Nod factor signal transduction pathway has been greatly aided by the adoption of genetically tractable model legumes. Recent studies have identified a number of genes involved in this pathway and candidate proteins for the Nod factor receptor. Furthermore, a plethora of cellular responses have been linked with Nod factor perception. This Botanical Briefing covers recent advances in the dissection of Nod factor signal transduction in the plant.Copyright 2001 Annals of Botany Company

Review, Nod factor, rhizobia, nodulation, signal transduction


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