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  • Schlegelella
    Publication . Nunes, Olga C.; Manaia, Célia M.; Vaz-Moreira, Ivone
    Schle.gel.el'la. L. fem. dim. ending ‐ella; N.L. fem. n. Schlegelella named in honor of H. G. Schlegel, a pioneer in PHA research. Proteobacteria / Betaproteobacteria / Burkholderiales / Comamonadaceae / SchlegelellaShort rods 0.8–2.8 μm long and 0.4–0.6 μm wide. Motile. Gram‐negative. Nonsporulating. Aerobe. Moderately thermophilic or mesophilic, with optimal growth occurring at 45–50°C or 30–37°C, respectively. Chemoorganotroph. Accumulates polyhydroxyalkanoates (PHA). Catalase and cytochrome c oxidase variable. The major fatty acids are C16:0 and cyclo‐C17:0 or C16:1 ω7c and/or C16:1 ω6c, depending on the species. The type species is Schlegelella thermodepolymerans. Schlegelella aquatica and Schlegelella brevitalea are two other species with validly published names. DNA G + C content (mol%): 69.2–70.0 (HPLC) or 67.5–70.3 (genome analysis, GenBank). Type species: Schlegelella thermodepolymerans Elbanna et al. 2003VP.
    2021-02-14Capítulo de livro Acesso aberto Ver mais
  • Candidimonas
    Publication . Manaia, Célia M.; Vaz-Moreira, Ivone; Nunes, Olga C.
    Can.di.di.mo'nas. L. masc. adj. candidus white; L. fem. n. monas a unit, monad; N.L. fem. n. Candidimonas a unit (rod) that produces white colonies. Proteobacteria / Betaproteobacteria / Burkholderiales / Alcaligenaceae / CandidimonasRods, non‐spore‐forming, Gram‐stain‐negative. Nonmotile or motile by polar flagella. Aerobic or facultatively aerobic chemoorganotrophic respiratory metabolism. Mesophilic with optimal growth at around 30°C. Growth can occur in the psychrophilic range of 1–5°C. Reacts positively for the catalase and cytochrome c oxidase tests. Sole carbon sources include amino acids and organic acids. Glucose can be oxidized or assimilated but not fermented. Anaerobic growth can be observed in the presence of nitrate. Depending on the species, nitrate is reduced to nitrite or nitrogen. The major respiratory quinone is ubiquinone 8, and the DNA G + C content ranges 62–65 mol%. Fatty acid composition is variable among species, with C16:0 predominating in all species, and C17:0 cyclo, summed feature 3 (C16:1 ω7c and/or iso‐C15:0 2‐OH), C18:1 ω7c, and summed feature 2 (C14:0 3‐OH and/or iso‐C16:1 I) represented among the major components in the validly named species. The polar lipids comprise phosphatidylethanolamine, phosphatidylglycerol, diphosphatidylglycerol, and some minor unidentified aminophospholipids and aminolipids. Phylogenetically, the genus Candidimonas belongs to the family Alcaligenaceae. The type species is Candidimonas nitroreducens, and the genus includes also Candidimonas humi and Candidimonas bauzanensis.
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