Abstract

The ecology and physiology of ectomycorrhizal (EcM) symbiosis with conifer trees are well documented. In comparison, however, very little is known about the molecular regulation of these associations. In an earlier study, we identified three EcM-regulated Pinus expressed sequence tags (EST), two of which were identified as homologous to the Medicago truncatula nodulin MtN21. The third EST was a homologue to the receptor-like kinase Clavata1. We have characterized the expression patterns of these genes and of auxin- and mycorrhiza-regulated genes after induction with indole-3-butyric acid in Pinus sylvestris and in a time course experiment during ectomycorrhizal initiation with the co-inoculation of 2,3,5-triiodobenzoic acid, an auxin transport inhibitor. Our results suggest that different P. sylvestris nodulin homologues are associated with diverse processes in the root. The results also suggest a potential role of the Clv1-like gene in lateral root initiation by the ectomycorrhizal fungus.

Published in

Mycorrhiza
2012, Volume: 22, number: 4, pages: 271-277

SLU Authors

• Heller, Gregory

  • Department of Forest Mycology and Pathology, Swedish University of Agricultural Sciences
    

• Lundén, Karl

  • Department of Forest Mycology and Pathology, Swedish University of Agricultural Sciences
    

• Finlay, Roger

  • Department of Forest Mycology and Pathology, Swedish University of Agricultural Sciences
    

• Asiegbu, Frederick

  • University of Helsinki

• Elfstrand, Malin

  • Department of Forest Mycology and Pathology, Swedish University of Agricultural Sciences
    

UKÄ Subject classification

Biochemistry and Molecular Biology


Publication Identifiers

DOI: https://doi.org/10.1007/s00572-011-0402-2

Permanent link to this page (URI)

https://res.slu.se/id/publ/39007