Mycorrhiza

, Volume 10, Issue 1, pp 37–42

Influence of genes determining supernodulation on root colonization by the mycorrhizal fungus Glomus mosseae in Pisum sativum and Medicago truncatula mutants

Authors

  • D. Morandi
    • UMR BBCE-IPM, CMSE-INRA, BV 1540, F-21034 Dijon cédex, France e-mail: morandi@epoisses.inra.fr Fax: +33-(0)-3-80693263
  • Muriel Sagan
    • Unité de Recherche en Génétique et Amélioration des Plantes, INRA, BV 1540, F-21034 Dijon cédex, France
  • Emilce Prado-Vivant
    • Unité de Recherche en Génétique et Amélioration des Plantes, INRA, BV 1540, F-21034 Dijon cédex, France
  • Gérard Duc
    • Unité de Recherche en Génétique et Amélioration des Plantes, INRA, BV 1540, F-21034 Dijon cédex, France
ORIGINAL PAPER

DOI: 10.1007/s005720050285

Cite this article as:
Morandi, D., Sagan, M., Prado-Vivant, E. et al. Mycorrhiza (2000) 10: 37. doi:10.1007/s005720050285

Pisum sativum

(pea) mutants of the wild type cv. Frisson and six supernodulating Medicago truncatula mutants of the wild-type cv. Jemalong line J5 for their ability to form endomycorrhizas. The six mutants of M. truncatula were shown to be allelic mutants of the same gene Mtsym12, whereas distinct genes (sym28 and sym29) are known to determine the supernodulation character of the P64 and P88 pea mutants, respectively. Mutant P88 of pea and the majority of the M. truncatula mutants were significantly more colonized by the mycorrhizal fungus Glomus mosseae than their corresponding wild types, 4 weeks and 30 days after inoculation, respectively. These differences were expressed essentially in transversal intensity rather than in length intensity of root colonization and appeared to correspond to an increase in arbuscule formation. Results are discussed in relation to the mutated genes and, in particular, whether the observed effects are due indirectly to plant physiological modifications or are a direct result of possible common factors of regulation of nodulation and mycorrhizal development.

Pisum sativum Medicago truncatula Mycorrhizal colonization Supernodulating mutants

Copyright information

© Springer-Verlag Berlin Heidelberg 2000