Journal
GEOMICROBIOLOGY JOURNAL
Volume 26, Issue 8, Pages 597-605Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/01490450903316174
Keywords
Fe-oxide mats; fungi; hydrothermal; Vailulu'u; yeast
Funding
- Agouron Foundation
- National Science Foundation [OCE-0433692]
- Direct For Biological Sciences [0742010] Funding Source: National Science Foundation
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Active undersea volcanoes generate complex hydrothermal environments that provide microbial habitats rich in reduced metals. These habitats harbor a substantial microbial communities functionally capable of Fe(II) and Mn(II) oxidation. The role of eukaryotes in these settings remains largely unknown. We explored the presence of fungi in actively growing Fe-oxide mats and basalt rock surfaces from the active volcano, Vailulu'u seamount (Samoan chain). Here we document the presence of a diverse fungal community including eight yeasts and yeast-like fungal species isolated from cold hydrothermal environments and basalt rock surfaces. Many of the isolates produce siderophores, a class of molecules used to acquire and utilize Fe (III), and one isolate, Rhodotorula graminis oxidizes Mn(II). These results suggest that fungi may also play a functional role in seafloor alteration and biomineralization processes.
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