Regulation of Ammonia Assimilating Enzymes in the Ruminal Bacteria Selenomonas Ruminantium and Succinivibrio Dextrinosolvens

Selenomonas ruminantium was grown in continuous culture under glucose-limitation at dilution rates of .05, .10, .20, .30 and .42 and under ammonia-limitation at dilution rates of .05, .10 and .20, to determine the effects of dilution rate and growth-limiting nutrients on cell physiology, efficiency of growth and ammonia assimilating enzymes. Culture viability was decreased at low dilution rates for both growth-limiting conditions, but the decrease in viability was more severe in glucose-limited cultures. Cell composition changed little under the conditions tested; however, the amount of nitrogen containing material (as % dry weight) was lower in ammonia-limited than in glucose-limited cultures of S. ruminantium.

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Dairy Science

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2014

Author dc:creator

• Patterson, John Andrews

• Agriculture, Animal Culture and Nutrition

Identifier

(UMI)AAI8302956

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/71717