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- Title
Interactions between arbuscular mycorrhizal fungi and a mycorrhiza-defective mutant tomato: does a noninfective fungus alter the ability of an infective fungus to colonise the roots– and vice versa?
- Authors
Cavagnaro, Timothy R.; Smith, F. Andrew; Smith, Sally E.
- Abstract
• We have investigated whether inoculation of a mycorrhiza-defective mutant (rmc) of tomato (Lycopersicon esculentum) with an individual arbuscular mycorrhizal (AM) fungal species affects subsequent colonisation by another AM fungal species that has different infectivity when presented alone. Inoculum was provided by leek (Allium porrum) growing in‘nurse pots’ into whichrmcseedlings were planted, and between which they were subsequently transferred.• Inoculation withGlomus coronatum, an AM fungal species that has low infectivity towardsrmc, did not prevent colonisation byGlomussp. WFVAM 23 (identified asG. versiformein our previous studies). Also, colonisation byG. sp. WFVAM 23 did not facilitate colonisation byG. coronatum.• The results show that the mechanism by whichrmcprevents cortical colonisation by most AM fungi is not dependent on, or modified by, prior plant interactions with individual AM fungal species. The two fungi used here clearly perceive the outcome of the mutation differently.• Growth responses ofrmcafter sequential inoculation with the two AM fungi are briefly analysed in terms of competition for limiting soil nutrient resources with the nurse plants.New Phytologist(2004)doi: 10.1111/j.1469-8137.2004.01210.x© New Phytologist(2004)
- Subjects
MYCORRHIZAL fungi; TOMATOES; GLOMUS (Fungi); PLANT nutrients; SYMBIOSIS
- Publication
New Phytologist, 2004, Vol 164, Issue 3, p485
- ISSN
0028-646X
- Publication type
Article
- DOI
10.1111/j.1469-8137.2004.01210.x