Publication Date

1986

Document Type

Dissertation/Thesis

First Advisor

Toth, Ronald

Degree Name

M.S. (Master of Science)

Legacy Department

Department of Biological Sciences

LCSH

Onions; Mycorrhizas; Roots (Botany)

Abstract

Allium cepa L. seeds were planted in soil inoculated with Glomus fasciculatum and grown for a period of 90 days in the greenhouse. Sectioned roots were examined with a light microscope and fungal structures were counted using a Weibel reticle in the ocular of the microscope. The absolute volume of the root occupied by developing arbuscules, degenerating arbuscules, intercellular hyphae, intracellular hyphae and vesicles was determined. It was found that 4% of the root-volume was occupied by the fungus, of which 0.78% was occupied by developing arbuscules, 0.58% by degenerating arbuscules, 2.35% by intercellular hyphae, 0.02% by intracellular hyphae and 0.28% by vesicles. By day 90, the volume of the root occupied by developing arbuscules, degenerating arbuscules and intercellular hyphae had increased significantly while the volume occupied by intracellular hyphae had decreased. The volume occupied by vesicles was variable over the 90 days but appeared to be increasing by day 90.

Comments

Bibliography: pages [38]-41.

Extent

41 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.

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