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Characterizing Cell-Cell And Cell-Surface Interactions In The Rhizobacterium Azospirillum Brasilense, Calvin Shay Green
Characterizing Cell-Cell And Cell-Surface Interactions In The Rhizobacterium Azospirillum Brasilense, Calvin Shay Green
Masters Theses
Microaerophilic and chemotaxic diazotrophs, azospirilla are found in close association with certain cereals such as durum wheat and maize and are active in enriching these ecological niches with the macronutrient nitrogen as ammonia. Regarded as highly pleomorphic, Azospirillum spp. are highly motile, using either a single polar flagellum when grown in liquid environments or peritrichous lateral flagella in viscous environments. Additionally, azospirilla are able to adhere onto surfaces as a biological film or aggregate cell-to-cell as nonproliferating flocculi, and these two processes having been suggested as positively affecting the survival and dispersal of the bacteria in the soil. Even though …
Chemotaxis Of Amphibian Pathogen Batrachochytrium Dendrobatidis In The Presence And Absence Of Antifungal Metabolites Produced By Amphibian Skin Bacteria, Brianna Ashlyn Lam
Chemotaxis Of Amphibian Pathogen Batrachochytrium Dendrobatidis In The Presence And Absence Of Antifungal Metabolites Produced By Amphibian Skin Bacteria, Brianna Ashlyn Lam
Masters Theses, 2010-2019
Chytridiomycosis is an amphibian skin disease that threatens amphibian biodiversity worldwide. The infectious fungal agent of chytridiomycosis, Batrachochytrium dendrobatidis, can affect amphibians differently in that some amphibian populations can co-exist with the fungus and others quickly succumb to disease. Amphibians in populations that co-exist with the B. dendrobatidis are shown to have sub-lethal infections on their skins. Several co-existing populations have also been shown to have higher proportions of individuals with antifungal skin bacteria suggesting the role of skin bacteria in disease outcome. Little is known about the mechanism(s) that antifungal skin bacteria use to ameliorate the effects of B. …