Abstract:
:Heterotrophic Proteobacteria and Actinobacteria were isolated from Lake Matano, Indonesia, a stratified, ferruginous (iron-rich), ultra-oligotrophic lake with phosphate concentrations below 50 nM. Here, we describe the growth of eight strains of heterotrophic bacteria on a variety of soluble and insoluble sources of phosphorus. When transferred to medium without added phosphorus (P), the isolates grow slowly, their RNA content falls to as low as 1% of cellular dry weight, and 86-100% of the membrane lipids are replaced with amino- or glycolipids. Similar changes in lipid composition have been observed in marine photoautotrophs and soil heterotrophs, and similar flexibility in phosphorus sources has been demonstrated in marine and soil-dwelling heterotrophs. Our results demonstrate that heterotrophs isolated from this unusual environment alter their macromolecular composition, which allows the organisms to grow efficiently even in their extremely phosphorus-limited environment.
journal_name
Environ Microbioljournal_title
Environmental microbiologyauthors
Yao M,Elling FJ,Jones C,Nomosatryo S,Long CP,Crowe SA,Antoniewicz MR,Hinrichs KU,Maresca JAdoi
10.1111/1462-2920.13063subject
Has Abstractpub_date
2016-02-01 00:00:00pages
656-67issue
2eissn
1462-2912issn
1462-2920journal_volume
18pub_type
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