The Roles of Microcystin and Sulfide in Physiology and Tactic Responses of Pathogenic and Non-Pathogenic Mat-Forming Cyanobacteria

Planktothricoides raciborskii and Roseofilum reptotaenium are physiologically similar, yet ecologically distinct organisms found in a hot spring outflow and coral black band disease (BBD), respectively. The aim of this study was to elucidate the relationship between R. reptotaenium and sulfide in BB...

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Main Author:	Brownell, Abigael C.
Format:	Others
Published:	FIU Digital Commons 2014
Subjects:	cyanobacteria black band disease hot springs physiology microcystin sulfide Biology Environmental Microbiology and Microbial Ecology Marine Biology Microbial Physiology Other Microbiology Pathogenic Microbiology
Online Access:	http://digitalcommons.fiu.edu/etd/1364 http://digitalcommons.fiu.edu/cgi/viewcontent.cgi?article=2325&context=etd

id	ndltd-fiu.edu-oai-digitalcommons.fiu.edu-etd-2325
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spelling	ndltd-fiu.edu-oai-digitalcommons.fiu.edu-etd-23252018-07-19T03:34:03Z The Roles of Microcystin and Sulfide in Physiology and Tactic Responses of Pathogenic and Non-Pathogenic Mat-Forming Cyanobacteria Brownell, Abigael C. Planktothricoides raciborskii and Roseofilum reptotaenium are physiologically similar, yet ecologically distinct organisms found in a hot spring outflow and coral black band disease (BBD), respectively. The aim of this study was to elucidate the relationship between R. reptotaenium and sulfide in BBD, to compare microcystin (MC) production in response to environmental factors, and to determine chemotactic responses to MC and sulfide by the two organisms. Results showed that the pathogenicity of R. reptotaenium in BBD is dependent on sulfate-reducing bacteria as secondary pathogens. Roseofilum reptotaenium produced significantly more MC than P. raciborskii, as measured using ELISA. Roseofilum reptotaenium was negatively chemotactic to sulfide, determined using horizontal and vertical gradients in agar, while P. raciborskii was not affected. Neither cyanobacterium was chemotactic to MC in the agar assays. The ecophysiology of P. raciborskii and R. reptotaenium in relation to MC production and response to sulfide reflected their pathogenic versus non-pathogenic status. 2014-03-24T07:00:00Z text application/pdf http://digitalcommons.fiu.edu/etd/1364 http://digitalcommons.fiu.edu/cgi/viewcontent.cgi?article=2325&context=etd FIU Electronic Theses and Dissertations FIU Digital Commons cyanobacteria black band disease hot springs physiology microcystin sulfide Biology Environmental Microbiology and Microbial Ecology Marine Biology Microbial Physiology Other Microbiology Pathogenic Microbiology
collection	NDLTD
format	Others
sources	NDLTD
topic	cyanobacteria black band disease hot springs physiology microcystin sulfide Biology Environmental Microbiology and Microbial Ecology Marine Biology Microbial Physiology Other Microbiology Pathogenic Microbiology
spellingShingle	cyanobacteria black band disease hot springs physiology microcystin sulfide Biology Environmental Microbiology and Microbial Ecology Marine Biology Microbial Physiology Other Microbiology Pathogenic Microbiology Brownell, Abigael C. The Roles of Microcystin and Sulfide in Physiology and Tactic Responses of Pathogenic and Non-Pathogenic Mat-Forming Cyanobacteria
description	Planktothricoides raciborskii and Roseofilum reptotaenium are physiologically similar, yet ecologically distinct organisms found in a hot spring outflow and coral black band disease (BBD), respectively. The aim of this study was to elucidate the relationship between R. reptotaenium and sulfide in BBD, to compare microcystin (MC) production in response to environmental factors, and to determine chemotactic responses to MC and sulfide by the two organisms. Results showed that the pathogenicity of R. reptotaenium in BBD is dependent on sulfate-reducing bacteria as secondary pathogens. Roseofilum reptotaenium produced significantly more MC than P. raciborskii, as measured using ELISA. Roseofilum reptotaenium was negatively chemotactic to sulfide, determined using horizontal and vertical gradients in agar, while P. raciborskii was not affected. Neither cyanobacterium was chemotactic to MC in the agar assays. The ecophysiology of P. raciborskii and R. reptotaenium in relation to MC production and response to sulfide reflected their pathogenic versus non-pathogenic status.
author	Brownell, Abigael C.
author_facet	Brownell, Abigael C.
author_sort	Brownell, Abigael C.
title	The Roles of Microcystin and Sulfide in Physiology and Tactic Responses of Pathogenic and Non-Pathogenic Mat-Forming Cyanobacteria
title_short	The Roles of Microcystin and Sulfide in Physiology and Tactic Responses of Pathogenic and Non-Pathogenic Mat-Forming Cyanobacteria
title_full	The Roles of Microcystin and Sulfide in Physiology and Tactic Responses of Pathogenic and Non-Pathogenic Mat-Forming Cyanobacteria
title_fullStr	The Roles of Microcystin and Sulfide in Physiology and Tactic Responses of Pathogenic and Non-Pathogenic Mat-Forming Cyanobacteria
title_full_unstemmed	The Roles of Microcystin and Sulfide in Physiology and Tactic Responses of Pathogenic and Non-Pathogenic Mat-Forming Cyanobacteria
title_sort	roles of microcystin and sulfide in physiology and tactic responses of pathogenic and non-pathogenic mat-forming cyanobacteria
publisher	FIU Digital Commons
publishDate	2014
url	http://digitalcommons.fiu.edu/etd/1364 http://digitalcommons.fiu.edu/cgi/viewcontent.cgi?article=2325&context=etd
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The Roles of Microcystin and Sulfide in Physiology and Tactic Responses of Pathogenic and Non-Pathogenic Mat-Forming Cyanobacteria

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