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Journal Article

Mycorrhizae Are Present in Cycad Roots

Jack B. Fisher and Andrew P. Vovides
Botanical Review
Vol. 70, No. 1 (Jan. - Mar., 2004), pp. 16-23
Published by: Springer on behalf of New York Botanical Garden Press
Stable URL: http://www.jstor.org/stable/27571171
Page Count: 8
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Mycorrhizae Are Present in Cycad Roots
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Abstract

We describe the occurrence of arbuscular mycorrhizae in the roots of Zamia pumila and Dioon edule. Seedlings were grown on native, unsterilized soil taken from local pinelands of south Florida, where Z. pumila occurs naturally. Arbuscules, hyphae, hyphal coils, and vesicles occur in the parenchyma cells of the root cortex, especially the half of the cortex next to the stele. Hyphae of the arbuscular mycorrhizal fungi (AMF) occur mainly in longitudinal intercellular spaces and conform to the Acorus type. The finest, ultimate roots have AMF, but these roots are extremely brittle, detach with the slightest disturbance, and are usually lost when plants are uprooted from the ground. No AMF were found in the cortex of coralloid roots.

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