Study on the oxygenic photosynthesis under anaerobic condition

• Project/Area Number: 15K14587
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Biodiversity/Systematics
• Research Institution: University of Tsukuba
• Principal Investigator: MINODA Ayumi 筑波大学, 生命環境系, 助教 (10597280)
• Project Period (FY): 2015-04-01 – 2017-03-31
• Project Status: Completed (Fiscal Year 2016)
• Budget Amount: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000); Fiscal Year 2016: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000); Fiscal Year 2015: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
• Keywords: 光合成 / 紅藻 / ラン藻 / 酸素ストレス / 嫌気生物 / 酸素発生型光合成 / 嫌気的環境 / 光合成生物 / 藻類

Outline of Final Research Achievements

We found that a unicellular red alga, Galdieria sulphuraria had the ability to perform oxygenic photosynthesis even at -270 mV of ORP value, which condition is obligatory anaerobic condition. At the obligatory anaerobic condition, anaerobic cyanobacterium, Plectoneama boryanum could not perform oxygenic photosynthesis. In previous study, many lateral gene transfer from anaerobic bacteria to G. sulphuraria has been reported (Schonknecht et al. Science 339, 1207-1210). We also found that some of such factors acquired by lateral gene transfer from anaerobic bacteria would involved in oxygenic photosynthesis under obligatory anaerobic condition.

Research Products

• [Journal Article] Effective and selective recovery of gold and palladium ions from metal wastewater using a sulfothermophilic red alga, Galdieria sulphuraria. (2016)
  • Author(s): Ju, X., Igarashi, K., Miyashita, K., Mitsuhashi, H., Inagaki, K., Fujii, S., Sawada, H., Kuwabara, T. and Minoda, A.
  • Journal Title: Bioresource Technology Volume: 211 Pages: 759-764
  • DOI: 10.1016/j.biortech.2016.01.061
  • NAID: 120007135458
  • Peer Reviewed / Open Access
• [Journal Article] Profiling of lipid and glycogen accumulations under different growth conditions in the sulfothermophilic red alga Galdieria sulphuraria. (2016)
  • Author(s): Sakurai, T., Aoki, M., Ju, X., Ueda, T., Nakamura, Y., Fujiwara, S., Umemura, T., Tsuzuki, M., and Minoda, A.
  • Journal Title: Bioresource Technology Volume: 200 Pages: 861-866
  • DOI: 10.1016/j.biortech.2015.11.014
  • Peer Reviewed / Open Access
• [Journal Article] 二酸化炭素という極限における光合成の可能性 -紅藻イデユコゴメ類の産業利用の可能性- (2016)
  • Author(s): 蓑田 歩
  • Journal Title: 配管技術 Volume: 58 Pages: 16-22
• [Journal Article] 100% CO2という極限における光合成の「未知」 (2016)
  • Author(s): 蓑田 歩
  • Journal Title: 化学と工学 Volume: 68 Pages: 709-711
• [Journal Article] 循環型エネルギーを利用した硫酸性温泉紅藻によるレアアース回収システム (2015)
  • Author(s): 蓑田 歩
  • Journal Title: バイオベース資源確保戦略 (小西康裕監修) Volume: CMC出版 Pages: 169-175
• [Presentation] Characterization of photosynthesis in Galdieria sulphuraria under high CO2 condition (2016)
  • Author(s): Ju, X., Itoh, M. and Minoda, A.
  • Organizer: 日本化学会春期大会
  • Place of Presentation: 京都府 京田辺市 同志社大学
  • Year and Date: 2016-03-24
• [Presentation] Selective recovery of gold and palladium ions from metal wastewater using a sulfothemophilic red alga Galdieria sulphuraria (2015)
  • Author(s): Ju, X., Igarashi, K., Miyashita, K., Mitsuhashi, H., Inagaki, K., Fujii, S., Sawada, H., Kuwabara, T. and Minoda, A.
  • Organizer: Algae Europe
  • Place of Presentation: リスボン (ポルトガル）
  • Year and Date: 2015-12-01
  • Int'l Joint Research
• [Patent(Industrial Property Rights)] 藻体を利用した貴金属回収 (2015)
  • Inventor(s): 蓑田 歩
  • Industrial Property Rights Holder: (株)ガルデリア
  • Industrial Property Rights Type: 特許
  • Industrial Property Number: 2015-249567
  • Filing Date: 2015-12-22