Evolutional size change in living and fossil Gephyrocapsa

• Project/Area Number: 23540550
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Stratigraphy/Paleontology
• Research Institution: Okayama University
• Principal Investigator: HAGINO Kyoko 岡山大学, 地球物質科学研究センター, 研究員 (90374206)
• Co-Investigator(Kenkyū-buntansha): KOGAME Kazuhhiro 北海道大学, 大学院・理学研究院, 准教授 (80215219)
• Co-Investigator(Renkei-kenkyūsha): KUWATA Akira 独立行政法人水産総合研究センター, 研究員 (40371794) ; HORIGUCHI Takeo 北海道大学, 理学系研究院, 教授 (20212201)
• Research Collaborator: BENDIF El Mahdi The Marine Biological Association of the UK, 博士研究員 ; PROBERT Ian Station Biologique Roscoff, France, 研究員 ; VARGAS Colomban De Station Biologique Roscoff, France, 研究員 ; YOUNG Jeremy University College London, UK, 研究員
• Project Period (FY): 2011 – 2013
• Project Status: Completed (Fiscal Year 2013)
• Budget Amount: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000); Fiscal Year 2013: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2012: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000); Fiscal Year 2011: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
• Keywords: コッコリス / 微化石 / 円石藻 / 進化 / 多様性 / 層序 / 多様化

Research Abstract

We examined morphological and morphometric variations in fossils Gephyrocapsa in the Quaternaly in North West Atlantic Ocean, morphometric changes in coccoliths of culture strains of G. oceanica in relation to growth phase, and genetic variation of living G. oceanica in nuclear, plastid and mitcondrial sequences. Morphological studies of fossil Gephyrocapsa showed that fossils of small Gephyrocapsa are varied in morphology of central area, distal shield elements and of bridge angle. Culture experiments revealed that coccoliths produced in stationary phase is larger than log phase, and size range of coccoliths differs between the strains. Molecular study revealed that cox-1b is suitable for the study of variation in G. oceanica.

Research Products

• [Journal Article] Genetic delineation between and within the widespread coccolithophore morpho-species Emiliania huxleyi and Gephyrocapsa oceanica (Haptophyta) (2014)
  • Author(s): Bendif E, Probert I, Romac S, Hagino K, de Vargas C
  • Journal Title: J Phycology Volume: Vol.50 Issue: 1 Pages: 140-148
  • DOI: 10.1111/jpy.12147
  • Year and Date: 2014-01-13
  • Peer Reviewed
• [Journal Article] Discovery of an endosymbiotic nitrogen-fixing cyanobacterium UCYN-A in Braarudosphaera bigelowii (Prymnesiophyceae) (2013)
  • Author(s): Hagino K, Onuma R, Kawachi M, Horiguchi T
  • Journal Title: PLoS One Volume: Vol.8(12) Issue: 12 Pages: e81749-e81749
  • DOI: 10.1371/journal.pone.0081749
  • Peer Reviewed
• [Journal Article] Tritiumin Japanese precipitation followingthe March 2011 Fukushima Daiichi Nuclear Plant accident (2013)
  • Author(s): Matsumoto, T., Maruoka, T., Shimoda, G., Obata, H., Kagi, H., Suzuki, K., Yamamoto, K., Mitsuguchi, T., Hagino, K., Tomioka, N., Sambandam, C., Brummer, D., MartinKlaus, P. & Aggarwal, P
  • Journal Title: Science of the Total Environment Pages: 365-70
  • Peer Reviewed
• [Journal Article] 円石藻. In : 谷村好洋 and 辻彰洋 (Editors) (2012)
  • Author(s): 萩野恭子 and Young, J.R
  • Journal Title: 微化石,東海大学出版会 Pages: 100-105
• [Journal Article] Recent environmental changes enhance coccolithophorid blooms in the Bering Sea. (2012)
  • Author(s): Naomi Harada
  • Journal Title: Global Biogeochemical Cycles Volume: 26 Issue: 2 Pages: 1-13
  • DOI: 10.1029/2011gb004177
  • Peer Reviewed
• [Journal Article] New evidence for morphological and genetic variation in the cosmopolitan coccolithophore Emiliania huxleyi (Prymnesiophyceae) from the cox1b-atp4 genes (2011)
  • Author(s): Kogame, K.
  • Journal Title: Journal of Phycology Volume: 47 Issue: 5 Pages: 1164-1176
  • DOI: 10.1111/j.1529-8817.2011.01053.x
  • Peer Reviewed
• [Presentation] Relationships among Braarudosphaera bigelowii, Chrysochlomulina parkeae, and the prymnesiophyte host of the cyanobacterium UCYN-A (2013)
  • Author(s): Hagino, K. Onuma, R., Kawachi M. and Horiguchi, T
  • Organizer: 14th meeting of the International Nannoplankton Association
  • Place of Presentation: Reston Sheraton Hotel, Virginia, USA
  • Year and Date: 2013-09-25
• [Presentation] 円石藻Braarudosphaera bigelowii の進化史とシアノバクテリアとの共生 (2013)
  • Author(s): 萩野恭子, 河地正伸
  • Organizer: 日本地球惑星科学連合 連合大会
  • Place of Presentation: 幕張メッセ
  • Year and Date: 2013-05-19
• [Presentation] Living-fossil coccolithophore survivors of the Cretaceous-Paleogene mass extinction (2013)
  • Author(s): Kyoko Hagino, Young, J.R., Bown, P.R. Godrijan, J., Kogame, K., Kulhanek, D.K & Horiguchi, T
  • Organizer: 古海洋シンポジウム
  • Place of Presentation: 東京大学大気海洋研究所
• [Presentation] 円石藻 Braarudosphaera bigelowii の進化史とシアノバクテリアとの共生 (2013)
  • Author(s): 萩野恭子，河地正伸
  • Organizer: 日本地球惑星科学連合 連合大会
  • Place of Presentation: 幕張メッセ
  • Invited
• [Presentation] Relationships among Braarudosphaera bigelowii, Chrysochlomulina parkeae, and the prymnesiophyte host of the cyanobacterium UCYN-A (2013)
  • Author(s): Kyoko Hagino, Ryo Onuma, Masanobu Kawachi and Takeo Horiguchi
  • Organizer: 14th meeting of the International Nannoplankton Association
  • Place of Presentation: Sheraton Reston, Virginia, USA
• [Presentation] 円石藻の生きている化石, Tergestiella adriatica (2012)
  • Author(s): 萩野恭子, Jeremy R. Young, Paul R. Bown, Jelena Godrijan, 小亀一弘, Denise K. Kulhanek, 堀口健雄
  • Organizer: 第36回日本藻類学会
  • Place of Presentation: 北海道大学
• [Presentation] Colomban de Vargas, & 岡田 尚武, 円石藻Emiliania huxleyi のコッコリスの形態とミトコンドリア COX1b-ATP4遺伝子配列に見られる多型 (2011)
  • Author(s): 萩野 恭子, Bendif, E.M., Young, J.R., 小亀 一弘, Probert, I., 高野 義人, 堀口 健雄
  • Organizer: 日本植物学会
  • Place of Presentation: 東京大学
  • Year and Date: 2011-09-18
• [Presentation] 円石藻Coccolithus braarudiiのヘテロココリスの形成と結晶方位 (2011)
  • Author(s): 猿渡和子・萩野恭子・小暮敏博・白岩善博
  • Organizer: 第14回マリンバイテクノロジー学会大会
  • Place of Presentation: 静岡県コンベンションアーツセンター
• [Presentation] 新生代化石ココリスの結晶方位解析 (2011)
  • Author(s): 猿渡和子・萩野恭子・長澤寛道・小暮敏博
  • Organizer: 2011年鉱物科学会年会
  • Place of Presentation: 茨城大学
• [Presentation] 円石藻Emiliania huxleyi のコッコリスの形態とミトコンドリア COX1b-ATP4遺伝子配列に見られる多型 (2011)
  • Author(s): 萩野 恭子, El Mahdi Bendif, Jeremy R. Young, 小亀 一弘, Ian Probert, 高野 義人, 堀口 健雄, Colomban de Vargas, 岡田 尚武
  • Organizer: 日本植物学会
  • Place of Presentation: 東京大学（ 東京都）