Be sure to attend all three exciting Division I symposia at Orlando, featuring the Division I lecture by Karl Stetter on Monday morning!

Division I events at Orlando:

Monday, 5/21:

12/I, Extremophilic Prokaryotes (Monday, 5/21, 8-10:30 AM, 206)

Conveners: Michael T. Madigan and James T. Staley

Remarkable prokaryotes are known that thrive under environmental conditions humans find "extreme". In this symposium five leading scientists, each an expert in the microbiology of a particular extreme environment, will describe microbial habitats as diverse as boiling hot springs and Antarctic sea ice, metal laden acidic waters and caustic soda lakes, and brines saturated with NaCl. Following a consideration of the habitat, each speaker will describe the diversity of prokaryotic life forms found in their particular extreme environment of interest including their phylogenetic relationships to other organisms, and then briefly consider biochemical/physiological mechanisms that allow for optimal growth at a given extreme. Attendees with interests in bacterial diversity, life in extreme environments, biotechnology, and exobiology will find this symposium to be a stimulating update of the microbiology of prokaryotes that live "on the fringe".

* Juergen Wiegel -- Alkalithermophiles

*      Jill Banfield -- Acidophiles

* James T. Staley -- And Some Like It Cold: Psycrophiles

* Aharon Oren -- Life in Saturated NaCl Solutions: Ecology and Physiology of Archaea and Bacteria in Saltern Crystallizer Ponds

• Karl O. Stetter -- Division I Lecture: Hyperthermophiles: Diversity and Adaptations to Their Environments

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A brief Division I business meeting, 11AM room 206, will follow the Stetter lecture. Please come with topics for next year’s meeting, as well as nominees for next year’s chair-elect and councilors.

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Poster session:

67/I: Microbial Metabolism and New Techniques in General Microbiology  1-2:30 PM

Tuesday, 5/22:

110/I, Anaerobic Respiration: New Vistas (Tuesday, 5/22, 8-10:30AM, 308A)

Conveners: John D. Coates and Edward R. Leadbetter

This session focuses on modes of anaerobic respiration that recently have assumed new significance, both basic and as applied to the environment.

* Kai Finster -- Sulfur Disproportionation in Anaerobic Habitats

* Jared R. Leadbetter -- Acetogenesis in Diverse Organisms, Diverse Habitats

*      Laurie A. Achenbach -- The Diverse Microbiology of Perchlorate Reduction

*      Antje Boetius -- Anaerobic Methane Oxidation Mediated by a Marine Microbial Consortium

Poster sessions:

134/I: Microbial Responses to Stress and Environmental Stimuli  10:30-12 noon

165/I: Archaea and Methanogenesis 1-2:30 PM 

166/I: Chemotaxis, Development, and Cell Division 1-2:30 PM  

 
Joint Mixer: Divisions H, I, J, K, N, Q, R, W

Time: 6–10pm, Tuesday 5/22

Location: Rosen Center (across the street from the Convention Center). Join us for music, light snacks, and a good time. Cash bar will be available for purchasing your favorite beverages.

 
Wednesday, 5/23:

 272/I, Regulation of Bacterial Differentiation (Wednesday, 5/23, 2:30-5PM, 308A)

Conveners: William Margolin and Kit Pogliano

This session will focus on the strategies bacteria use in order to change from vegetatively growing cells to new cell types in response to either internal or external cues. Nutrient starvation causes Bacillus subtilis to form endospores, Myxococcus xanthus cells to form spores inside large fruiting bodies, Streptomyces to form spores within aerial hyphae, and cyanobacteria to form nitrogen-fixing heterocysts within an existing chain of cells. In contrast, Caulobacter crescentus continuously forms swarmer and stalked cells in response to internal cell cycle cues. The talks in this session will highlight some of the recent advances in understanding the molecular mechanisms behind these dramatic changes in cell fate.

*  Kit Pogliano -- Coupling Membrane Movement and Fusion to Cell-Specific Gene Expression

*  Richard Losick -- Discovering Genes Involved in Morphological Differentiation in Streptomyces coelicolor

*  James W. Golden -- Pattern Formation in Cyanobacteria

*  Christine M. Jacobs -- Dynamics of Two-Component Signal Transduction Proteins Controlling Differention and Cell Cycle Progression in Caulobacter

• David R. Zusman -- Timing of Sporulation of Myxococcus xanthus

Poster sessions:

252/I: General Microbiology 1-2:30 PM

253/I: Microbial Diversity and Interactions 1-2:30 PM

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