BIOL240 Lecture Notes - Proteobacteria, Autotroph, Thaumarchaeota
Document Summary
Fundamentals of microbiology (biology 140) Learning objectives: to continue exploring the diversity of the archaea, within the. The cultured examples of crenarchaeotes are almost all obligate anaerobes, and they are either chemoorganotrophs or chemolithotrophs (table 19. 8). These organisms include some of the most hyperthermophilic organisms known (table 19. 9). Indeed, most of the crenarchaeotes that have been cultured are hyperthermophiles, and they have been isolated from diverse habitats (table 19. 7). One fascinating symbiosis (parasitism) of note exists between the euryarchaeote. Igniococcus and the crenarchaeote nanoarchaeum. One mesophilic crenarchaeote has been cultured and had its genome sequenced (nitrosopumulis maritimus strain scm1). These findings are surprising because for approximately 100 years (since winogradsky! ), microbiologists had believed that only the proteobacteria were responsible for autotrophic ammonia oxidation. Antarctic (figure 19. 22, table 19. 7).