1887

Abstract

Four strains of alkaliphilic methanogens (strains WeN1, WeN2, WeN3, and WeN4 [T = type strain]) previously enriched and isolated from sediments of four low-salt, high-pH (pH 8.3 to 9.3) lakes in the Wadi el Natrun of Egypt were further characterized. These organisms were H-oxidizing, CO-reducing, rod-shaped bacteria which grew best at high pH values (strains WeN1, WeN2, and WeN4 preferred pH 8.4 and grew at pH values up to 9.9; strain WeN3 grew best at pH 7.8 and grew at pH values up to 9.2). Each strain required sulfide as a sulfur source and was resistant to elevated concentrations (growth rates in the presence of 0.5% NaS · 9HO were one-third to one-half the maximum observed rates). The guanine-plus-cytosine content of the deoxyribonucleic acid of strain WeN4 was 57 mol%. A new species of methanogen, , is described; strain WeN4 (= DSM 3387) is the type strain.

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/content/journal/ijsem/10.1099/00207713-36-3-380
1986-07-01
2019-12-09
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http://instance.metastore.ingenta.com/content/journal/ijsem/10.1099/00207713-36-3-380
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