Title

Phylogenetic relationships among actinorhizal plants. The impact of molecular systematics and implications for the evolution of actinorhizal symbioses

Document Type

Conference Proceeding

Publication Date

1-1-1997

Abstract

A review of recent molecular systematic studies of actinorhizal plants and their Frankia endosymbionts is presented. For comparative purposes, a discussion of recent studies pertaining to the evolution of nodulation in the legume-rhizobium system is included. Molecular systematic studies have revealed that actinorhizal plants are more closely related than current taxonomic schemes imply. Broad-based analyses of the chloroplast gene rbcL indicate that all symbiotic root-nodulating higher plants belong to a single large clade. More focused molecular analyses of both legume and actinorhizal hosts within this large clade indicate that symbioses have probably arisen more than once. By comparing host phylogenies and recently published bacterial phylogenies, we consider the coevolution of bacterial symbionts with their actinorhizal hosts.

Publication Name

Physiologia Plantarum

Volume Number

99

First Page

565

Last Page

573

Issue Number

4

DOI

10.1034/j.1399-3054.1997.990407.x

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