Sulfur bacteria originating from the water and organisms in a hydrothermally active area of the mid-okinawa trough |
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| Authors: | Takeshi Naganuma Eiko Ikemoto Shunji Sukizaki Yoshito Tsuji Hiroshi Hotta |
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| Institution: | (1) Deep Sea Research Department, Japan Marine Science and Technology Center (JAMSTEC), 2-15 Natsushima-cho, 237 Yokosuka, Japan |
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| Abstract: | Hydrothermal venting and associated fauna were observed in the mid-Okinawa Trough during deep-sea diving byShinkai 2000. Water and organisms were collected there for on-board cultivation of sulfur bacteria. Sulfur bacteria capable of growing on an inorganic medium containing thiosulfate were subcultured and isolated. The isolated chemoautotrophic sulfur bacteria were all rod- to beanshaped, nonsporing, and gram-negative. They could also grow on an organic medium and thus were shown to be facultative chemoautotrophs. Their facultative chemoautotrophy would result in synergetic metabolism of both inorganic and organic substrates; thus the sulfur bacteria could be highly adaptive to nutritional diversity of hydrothermal vent areas. |
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