The pre-symbiotic growth of arbuscular mycorrhizal fungi is induced by a branching factor partially purified from plant root exudates.

@article{Bue2000ThePG,
  title={The pre-symbiotic growth of arbuscular mycorrhizal fungi is induced by a branching factor partially purified from plant root exudates.},
  author={Marc Bu{\'e}e and Michel Rossignol and Alain Jauneau and Raoul Ranjeva and Guillaume B{\'e}card},
  journal={Molecular plant-microbe interactions : MPMI},
  year={2000},
  volume={13 6},
  pages={693-8}
}
Arbuscular mycorrhizal (AM) symbiosis is an association between obligate biotrophic fungi and more than 80% of land plants. During the pre-symbiotic phase, the host plant releases critical metabolites necessary to trigger fungal growth and root colonization. We describe the isolation of a semipurified fraction from exudates of carrot hairy roots, highly active on germinating spores of Gigaspora gigantea, G. rosea, and G. margarita. This fraction, isolated on the basis of its activity on hyphal… CONTINUE READING
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