Publication Date

1982

Document Type

Dissertation/Thesis

First Advisor

Lynch, Darrel L.

Degree Name

M.S. (Master of Science)

Department

Department of Biological Sciences

LCSH

Rhizobium leguminosarum||Bacteria, Nitrifying||Ultrastructure (Biology)

Abstract

Rhizobium leguminosarum, a gram-negative nitrogenfixing organism that is commonly associated with plants of the pea group,was found to be susceptible to 1-2ppm of irgasan. It was also found that while strains of E. coli required the addition of divalent cations such as Mg or Ca to become resistant to irgasan and other halogenated bisphenols, the resistant strains of R. leguminosarum that were tested did not require the addition of these ions. The electron microscope did,however, reveal changes in the ultrastructure of organisms subjected to irgasan stress, lending credence to the view that the cell envelope of gra.m-negative organisms acts as an "adsorbing barrier," screening out many substances which may be toxic to the cell.

Comments

Includes bibliographical references.||Includes illustrations.

Extent

50 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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