1887

Abstract

During a study of microbial communities in athalassic bodies of water, three new species within the genus were described. These are alkaliphilic sp. nov. Z-7491 (DSM 8900) and halophilic sp. nov. Z-7692 (DSM 8902) from the soda-depositing Lake Magadi in Central Africa and haloalkaliphilic sp. nov. Z-7591 (DSM 8901) from Lake Khatyn, Central Asia. These mesophilic spirochetes develop at pHs of >9 as anaerobic saccharolytic dissipotrophs. The DNA base compositions (moles percent G+C) of the strains were as follows: -7491, 57.1; -7692, 56.1; and -7591, 49.2. The optimum growth parameters (temperature, pH, and NaCl concentration [percent, wt/vol], respectively) were as follows: for -7491, 35°C, 9.2, and 5 to 7%; for -7692, 35°C, 9.3, and 5 to 7%; and for -7591, 35°C, 8.9, and 3 to 6%. The products of glucose fermentation were acetate, hydrogen, ethanol, and lactate, in different proportions, for and ; for , they were acetate, ethanol, and lactate. is strictly anaerobic, while and are rather aerotolerant. All three species group within the radiation of the majority of the species of the genus . Studies of the genes encoding 16S rRNA indicate a possible fanning out of the phylogenetic tree of spirochetes.

Loading

Article metrics loading...

/content/journal/ijsem/10.1099/00207713-46-1-305
1996-01-01
2019-10-21
Loading full text...

Full text loading...

http://instance.metastore.ingenta.com/content/journal/ijsem/10.1099/00207713-46-1-305
Loading

Most Cited This Month

This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error