Cellular mechanisms of high capacity of asexual reproduction and regeneration of reef-building corals

• Project/Area Number: 23570080
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Morphology/Structure
• Research Institution: University of the Ryukyus
• Principal Investigator: HIDAKA Michio 琉球大学, 理学部, 教授 (00128498)
• Project Period (FY): 2011 – 2013
• Project Status: Completed (Fiscal Year 2013)
• Budget Amount: ¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000); Fiscal Year 2013: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000); Fiscal Year 2012: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000); Fiscal Year 2011: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
• Keywords: サンゴ / 年齢 / 老化 / テロメア / 群体 / 寿命 / 再生 / 無性生殖 / テロメラーゼ / 生活史 / 幹細胞

Research Abstract

This study aimed to understand the basic mechanisms of high capacity of asexual reproduction and long life spans of corals. The major findings are; (1) Telomere length of the coral Acropora digitifera shortens during development. This suggests that estimation of coral age is possible at least in some fast growing corals. (2) However, significant difference in the telomere length could not be detected among different developmental stages of Galaxea fascicularis. Somatic tissues of G. fascicularis exhibited high telomerase activities. The present results suggest that telomere rate of change might be different among coral species. Self-renewal and differentiation of stem-like cells in coral should be studied if we want to understand aging of coral.

Research Products

• [Journal Article] Telomere shortening in the colonial coral Acropora digitifera during development (2014)
  • Author(s): Tsuta H., Shinzato C., Satoh N., M. Hidaka
  • Journal Title: Zoological Science Volume: 31 Issue: 3 Pages: 129-134
  • DOI: 10.2108/zsj.31.129
  • NAID: 40020028965
  • Peer Reviewed
• [Journal Article] Telomere length of the colonial coral Galaxea fascicularis at different developmental stages (2013)
  • Author(s): Tsuta H. and M. Hidaka
  • Journal Title: Coral Reefs Volume: 32 Issue: 2 Pages: 495-502
  • DOI: 10.1007/s00338-012-0997-6
  • Peer Reviewed
• [Journal Article] Sperm of the solitary coral Ctenactis echinata exhibit a longer telomere than that of somatic tissue. (2013)
  • Author(s): Ojimi M.C., Loya Y., M. Hidaka
  • Journal Title: Zoological Studies Volume: 未定
  • Peer Reviewed
• [Journal Article] Sperm of the solitary coral Ctenactis echinata exhibit a longer telomere than that of somatic tissue (2012)
  • Author(s): Ojimi M.C., Loya Y., M. Hidaka
  • Journal Title: Zoological Studies Volume: 51 Pages: 1475-1480
  • URL: http://zoolstud.sinica.edu.tw/Journals/51.8/1475.pdf
  • Peer Reviewed
• [Journal Article] Cellular kinetics in growth anomalies of scleractinian corals, Porites australiensis and Montipora informis. (2012)
  • Author(s): Yasuda, N., M. idaka
  • Journal Title: Diseases of Aquatic Organisms Volume: 102 Issue: 1 Pages: 1-11
  • DOI: 10.3354/dao02530
  • Peer Reviewed
• [Journal Article] Skeletal structure and progression of growth anomalies in Porites australiensis in Okinawa, Japan (2012)
  • Author(s): Yasuda N, Nakano Y, Yamashiro H, Hidaka M
  • Journal Title: Diseases of Aquatic Organisms Volume: 97 Issue: 3 Pages: 237-247
  • DOI: 10.3354/dao02408
  • Peer Reviewed
• [Journal Article] Somatic tissues of the coral Galaxea fascicularis possess telomerase activity. Galaxea (2012)
  • Author(s): Nakamichi, H., Ojimi, M. C., Isomura, N., Hidaka, M.
  • Journal Title: Journal of Coral Reef Studies Volume: 14 Pages: 53-59
  • Peer Reviewed
• [Journal Article] Somatic tissues of the coral Galaxea fascicularis possess telomerase activity. (2012)
  • Author(s): Nakamichi, H., Ojimi, M. C., Isomura, N., M. Hidaka
  • Journal Title: Galaxea, Journal of Coral Reef Studies Volume: 14 Pages: 53-59
  • NAID: 130005098590
  • Peer Reviewed
• [Presentation] 造礁サンゴコユビミドリイシのテロメア長は発生とともに短縮する (2013)
  • Author(s): 蔦宏興, 日高道雄
  • Organizer: 日本動物学会第84回大会
  • Place of Presentation: 岡山
• [Presentation] 造礁サンゴコユビミドリイシのテロメア長は発生とともに短縮する (2013)
  • Author(s): 蔦宏興・日高道雄
  • Organizer: 日本動物学会第84回大会
  • Place of Presentation: 岡山大学（岡山県岡山市）
• [Presentation] Stress response and life history trait of reef-building corals (2012)
  • Author(s): Hidaka, M.
  • Organizer: The 9th Okazaki Biology Conference"Marine Biology II"
  • Place of Presentation: 岡崎・沖縄
  • Invited
• [Presentation] Telomere lengths of different developmental stages of a colonial coral (2012)
  • Author(s): Tsuta, H., M. Hidaka
  • Organizer: Coral Reef Symp.
  • Place of Presentation: Cairns, Australia
• [Presentation] Molecular mechanisms regulating tissue homeostasis and cell lineage differentiation in Scleractinian corals (2012)
  • Author(s): Reyes-Bermudez, A., Hidaka, M., Watanabe, Y., Brooks, D., A. Mikheyev
  • Organizer: 12th Int. Coral Reef Symp.
  • Place of Presentation: Cairns, Australia
• [Presentation] アザミサンゴの精子、幼生、成群体のテロメア長について (2012)
  • Author(s): 蔦宏興, 日高道雄
  • Organizer: 第15回日本サンゴ礁学会大会
  • Place of Presentation: 東京
• [Presentation] 造礁サンゴの病気−成長異常−の進行過程について (2012)
  • Author(s): 安田直子, 日高道雄
  • Organizer: 第83回日本動物学会大会
  • Place of Presentation: 大阪
• [Presentation] Stress response and life history trait of reef-building corals. (2012)
  • Author(s): Hidaka, M.
  • Organizer: The 9th Okazaki Biology Conference “Marine Biology II”
  • Place of Presentation: 岡崎・沖縄
  • Invited
• [Presentation] アザミサンゴの特定染色体のテロメア長の測定 (2011)
  • Author(s): 蔦宏興, 日高道雄
  • Organizer: 日本動物学会第82回大会
  • Place of Presentation: 旭川
• [Presentation] 造礁サンゴの成長異常部における細胞増殖と細胞死について (2011)
  • Author(s): 安田直子, 日高道雄
  • Organizer: 日本動物学会第82回大会
  • Place of Presentation: 旭川
• [Presentation] サンゴの生活史と共生 (2011)
  • Author(s): 日高道雄
  • Organizer: 日本サンゴ礁学会第14回大会公開シンポジウム「サンゴ礁学－サンゴ礁の未知なる世界へ挑む：研究の最前線」(招待講演)
  • Place of Presentation: てぃるる（那覇市）
• [Presentation] アザミサンゴの特定染色体のテロメア長の測定 (2011)
  • Author(s): 蔦宏興・日高道雄
  • Organizer: 日本動物学会第82回大会
  • Place of Presentation: 大雪クリスタルホール（旭川市）
• [Presentation] Telomere lengths of different developmental stages of a colonial coral.
  • Author(s): Tsuta, H., M. Hidaka
  • Organizer: 12th Int. Coral Reef Symp.
  • Place of Presentation: Cairns, Australia
• [Presentation] Molecular mechanisms regulating tissue homeostasis and cell lineage differentiation in Scleractinian corals.
  • Author(s): Reyes-Bermudez, A., Hidaka, M., Watanabe, Y., Brooks, D., A. Mikheyev
  • Organizer: 12th Int. Coral Reef Symp.
  • Place of Presentation: Cairns, Australia
• [Presentation] アザミサンゴの精子、幼生、成群体のテロメア長について
  • Author(s): 蔦宏興・日高道雄
  • Organizer: 第15回日本サンゴ礁学会大会
  • Place of Presentation: 東京
• [Presentation] 造礁サンゴの病気-成長異常-の進行過程について
  • Author(s): 安田直子・日高道雄
  • Organizer: 第83回日本動物学会大会
  • Place of Presentation: 大阪
• [Book] サンゴ礁学 未知なる世界への招待（第6章サンゴの生活史と共生) (2011)
  • Author(s): 日高道雄
  • Total Pages: 362
  • Publisher: 東海大学出版会
• [Remarks] 日高研究室ホームページ
  • URL: http://www.cc.u-ryukyu.ac.jp/~hidakom/
• [Remarks] 琉球大学 理学部海洋自然科学科 日高研究室
  • URL: http://www.cc.u-ryukyu.ac.jp/~hidakom/
• [Remarks]
  • URL: http://www.cc.u-ryukyu.ac.jp/~hidakom/