Author

Naomi Kariya

Publication Date

1980

Document Type

Dissertation/Thesis

First Advisor

Toth, Ronald

Degree Name

M.S. (Master of Science)

Department

Department of Biological Sciences

LCSH

Zea diploperennis||Glomus fasciculatus||Mycorrhizas||Host-parasite relationships

Abstract

The ultrastructure of the vesicular-arbuscular mycorrhizal association formed by Glomus fasciculatus with Zea diploperennis was investigated. Intercellular hyphae were prevalent everywhere varying from young hyphae which contained a dense cytoplasm and few vacuoles to older hyphae with many small vacuoles giving a "reticulate" appearance. Penetration by the invading intracellular hypha or endophyte was accompanied by the stretching and thinning of the host cell wall and the formation of a host cell wall material, the collar, around the endophyte. The arbuscules were formed as the result of branching of the endophyte within the cortical cells. The host cell responded to the infection with an increase in host plasmalemma and cytoplasm. The host cytoplasm was never observed to be in direct contact with the arbuscular system. There was an interfacial zone between the host and the fungus consisting of host plasmalemma, the interfacial matrix and the fungal cell wall. Deterioration of the arbuscular system began from the finer branches and proceeded backwards to the point of penetration. Clumps were formed as a result of deteriorated arbuscular material and remnants of the host plasmalemma. The host cell did not undergo any significant structural changes as the fungus deteriorated.

Comments

Includes bibliographical references.

Extent

33 pages

Language

eng

Publisher

Northern Illinois University

Rights Statement

In Copyright

Rights Statement 2

NIU theses are protected by copyright. They may be viewed from Huskie Commons for any purpose, but reproduction or distribution in any format is prohibited without the written permission of the authors.

Media Type

Text

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