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Ectomycorrhiza Formation in Eucalyptus. II. The Ultrastructure of Compatible and Incompatible Mycorrhizal Fungi and Associated Roots
N. Malajczuk, R. Molina and J. M. Trappe
The New Phytologist
Vol. 96, No. 1 (Jan., 1984), pp. 43-53
Stable URL: http://www.jstor.org/stable/2432774
Page Count: 11
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Ultrastructure of Eucalyptus ectomycorrhizas initiated by compatible, host-specific fungi and by broad-host range fungi was compared with that of roots inoculated with incompatible, conifer-specific ectomycorrhizal fungi. The results indicate little difference in morphology between ectomycorrhizas formed by compatible, host-specific fungi and those formed by broad-host-range fungi. However, interaction between eucalypt roots and incompatible fungus species known to be conifer-specific induced either deposition of tannins in root tissue or, in the case of the Pseudotsuga-specific Suillus lakei, a characteristic hypersensitive reaction which resulted in lysis of hyphae and of epidermal and outer cortical cells of roots.
The New Phytologist © 1984 New Phytologist Trust