Norio Tanaka

Department

Department of Botany, Division of Plant Diversity and Conservation

Degree

PhD

E-mail

ntanaka@kahaku.co.jp

Information

researchmap（リンクを新しいタブで開きます）

Research Field

Evolution and genetic structure of aquatic plants, especially Hydrocharitaceae, Zosteraceae and other Alismatales.

Research Contents

Genetic structure and gene flow of seagrasses related to environmental factors.
Evolution of pollination mechanisms in the Hydrocharitaceae.
Conservation study of threatened aquatic plants.

Activities in academic conferences

• Norio Tanaka. The road ahead for the ex situ conservation of aquatic plants: a project to restore the extinct species Eriocaulon heleocharioides to the wild. General symposia "Biodiversity and conservation of aquatic plants". XIX International Botanical Congress, Shenzhen, China, July 28, 2017.7.28.
• Yu Ito, Chigaya Enjyu, Jie Li, Norio Tanaka. Evolutionary distinctiveness and conservation priority of the endangered Najas ancistrocarpa (Hydrocharitaceae).
  International Academic Conference on the Formation Mechanism of Plant Diversity in East Asia and Conservation of Endangered PlantsZhejiang, China. June, 2017.
• Yu Ito, Anders S. Barfod, Josef Bogner, Stephan Gale, Jie Li, Okihito Yano, Norio Tanaka. Species delimitation in the aquatic plant genus Ottelia (Hydrocharitaceae) with description of new species. 2016 Annual Meeting for Xishuangbanna Tropical Botanical Garden. Xishuangbanna, China. 2016.12.3.
• Yu Ito, Norio Tanaka, Anders S. Barfod, Robert B. Kaul, A. Muthama Muasya, Pablo García-Murillo, Natasha de Vere, Brigitta de Wilde and Dirk C. Albach. From terrestrial to aquatic habitats and back again — Molecular insights into the evolution and phylogeny of Callitriche (Plantaginaceae). 38th Australasian Systematic Botany Society meeting. 2016.9.27. Alice Springs, Australia.
• Yu Ito, Okihito Yano, Norio Tanaka & Jie Li. Phylogeny of Najas (Hydrocharitaceae) revisited: Implications for taxonomy, biogeography, and polyploid evolution. Botanical Research in Tropical Asia. Vientiane, Laos. Dec, 2015. (Oral, No. 78658)
• Norio Tanaka, Hitoshi Tamaki, Daisuke Muraoka, Makoto Tokuoka, Shingo Sakamoto, Teruhisa Komatsu and Masahiro Nakaoka. 2016. Impact of the Great East Japan Earthquake and Tsunami on the abundance and genetic diversity of seagrass beds along the northeastern coast of Japan. The International Symposium on Restoration after Great East Japan Earthquake. Tokyo, Japan.
• Yu Ito, Okihito Yano, Norio Tanaka, Jie Li. Phylogeny of Najas revisited (Hydrocharitaceae): implications for taxonomy, biogeography, and polyploid evolution. Botanical research in Tropical Asia, Dec 6 - 11, 2015, Vientiane, Lao PDR
• Yu Ito, Norio Tanaka, Tetsuo Ohi-Toma & Jin Murata. Phylogeny and systematics of the cosmopolitan aquatic genus Ruppia (Ruppiaceae): Implication for conservation FAPESP - JSPS Joint Research workshop. University of São Paulo
  , Brazil. Feb 2-4, 2015. (Poster, No. 34)
• Yu Ito, Pablo Garcia-Murillo, Norio Tanaka. Redefined c.again! A new delimitation of the genusAlthenia (Potamogetonaceae). 36th Australasian Systematic Botany Sosiety meeting. Palmerston North, NZ. Nov 26, 2014. AgHort lecture block, Massey campus, Palmerston North, NZ (Oral, Abstract P.34)
• Yu Ito, Dirk C. Albach, Muthama A. Muasya, Bengt Oxelman, Norio Tanaka. Phylogeny and biogeography of a cosmopolitan aquatic genus Limosella (Plantaginaceae): a test of the South African origin of an Australasian endemic species. 36th Australasian Systematic Botany Sosiety meeting. Palmerston North, NZ. Nov 26, 2014. AgHort lecture block, Massey campus, Palmerston North, NZ (Poster, Abstract P.42)
• Yu Ito, Dirk C. Albach, Robert Kaul, A. Muthama Muasya, Pablo Garcia-Murillo, Norio Tanaka, Natasha de Vere, Brigitta de Wilde & Pieter B. Pelser. Phylogeny and biogeography of a cosmopolitan aquatic plant, Callitriche (Plantaginaceae). Second International Symposium of Aquatic Plant BiologyC
  MACROPHYTE2014. Wuhan Botanical Garden, China. Oct 27-31, 2014. (Oral, Abstract P. 51)
• Masahiro Nakaoka, Katsumasa Yamada and Norio Tanaka. 2013. Changes in biodiversity and abundance of eelgrass bed community in northern Japan with the 2011 Tohoku earthquake and tsunami. 22nd Biennial conference of the coastal and estuarine research federation, San Diego, USA. Abstracts p.163.
• Yu Ito and Norio Tanaka. Phylogeny, hybridization, and biogeography of an aquatic genusZannichellia and its allies (Potamogetonaceae). The Fifth International Conference: The Comparative Biology of the Monocotyledon. New York, USA. July, 2013. p.166.
• Yu Ito, Norio Tanaka, and Pieter Pelser. Phylogeny and biogeography of an aquatic genusPotamogeton (Potamogetonaceae). The Fifth International Conference: The Comparative Biology of the Monocotyledon. New York, USA. July, 2013. Abstracts p. 58.
• Yu Ito, Changkyun Kim & Norio Tanaka. Phylogeny, habitat transition, and biogeography of an aquatic genus Sparganium (Typhaceae). The Fifth International Conference: The Comparative Biology of the Monocotyledon. New York, USA. July, 2013. Abstracts p. 59.
• Yu Ito, Pieter Pelser & Norio Tanaka. Toward the comprehension of the origin of antitropical distributions: A taxonomic review of cool-temperate aquatic plants in Asia and Oceania. JSPS 12th annual meeting. Chiba, Japan. March, 2013. (Oral, 1a03) .
• Yu Ito, Hugo Cota-Sanchez, Changkyun Kim & Norio Tanaka. A phylogenetic view of habitat transitions in the aquatic genus Sparganium (Typhaceae). Botany 2012 (63rd Annual Conference of the American Botanical Society). Columbus (OH), USA. July, 2012. (Oral, 300)
• Tanaka, N. Ito, Y., Hirayama, Y., Saitoh, K. & Nakaoka, M. 2011. Origin and Genetic Structure of Zostera japonica (Zosteraceae), a Seagrass Distributed over a Wide Water-Temperature Range. XVlll International Botanical Congress. Merbourne. p.676
• Kato, J., Tanaka, N., Hayashi, M., Matsuda, A., Ito, N., Otsuka, K., Ohashi, H., Serizawa, S. & Mii, M. 2011.Variation of DNA content in Primula tosaensis. XVlll International Botanical Congress. Merbourne. p. 470@2011.7.25,26,28
• Tanaka, N. Ito, Y., Hirayama, Y., Saitoh, K. and Nakaoka, M. 2011. Phylogeny and genetic structure of Zostera japonica (Zosteraceae), a seagrass distributed over a wide water-temperature range. East Asian Botany: International Symposium 2011, Tsukuba, Japan.
• Yu Ito, Tetsuo Ohi-Toma, Jin Murata and Norio Tanaka. 2010. Hybridization and polyploidy of an Aquatic Plant, Ruppia (Ruppiaceae), inferred from plastic and nuclear DNA phylogenies. East Asian Plant Diversity and Conservation 2010, Seoul, Korea.
• Norio Tanaka. 2010. Evolutionary study of pollination mechanisms in the Hydrocharitaceae. Early events in Monocots evolution: Conference July 20-22 2010. (invited)
• Juntaro Kato, Mayuko Ikeda, Mai Hayashi, Rieko Ishikawa, Yasuko Yoshida, Ryo Ohsawa, Kei-ichiro Mishiba, Norio Tanaka, Ikuo Nakamura and Masahiro Mii. 2009. Differences in ploidy levels among interspecific hybrids obtained from the cross combinations using Primula sieboldii as female parent. 23th International Eucarpis Symposium, Section Ornamentals gColourful Breeding and Geneticsh. Leiden, Netherlands.
• Yu Ito, Norio Tanaka, Tetsuo Ooi-Toma and Jin Murata. 2009. Molecular phylogeney of an aquatic plant, Ruppia (Ruppiaceae) based on chloroplast and nuclear DNA sequences. 12th EWRS International Sympodium on Aquatic Weeds. Jyväskylä, Finland.
• Yu Ito, Norio Tanaka, Tetsuo Ooi-Toma and Jin Murata. 2008. Molecular phylogenetic studies on an aquatic plant, Ruppia (Ruppiaceae). The Fourth International Conference: The Comparative Biology of the Monocotyledon. Copenhagen, Denmark.
• Yu Ito, Norio Tanaka, Tetsuo Ooi-Toma and Jin Murata. 2008. Phylogenetic relationships and biogeography of the cosmopolitan genus Ruppia L.: inferred from chloroplast and nuclear gene sequences. The 8th International Seagrass Biology Workshop (ISBW8). Vancouver, Canada.
• Boon Keng Lim, Katsunori Yamaki, Yoshinori Koshikawa, Hisao Ogawa, Norio Tanaka. 2007. Technology on eelgrass Zostera marina bed restoration with consideration on the conservation of genetic diversity. The 4th Civil Engineering Conference in the Asian Region., Taipei, Taiwan.
• Yu Ito, Norio Tanaka, Tetsuo Ooi-Toma and Jin Murata. 2007. Phylogenetic studies of an aquatic plant, Ruppia (Ruppiaceae) with reference to the polyploid evolution. Annual Conference of Indian Association for Angiosperm Taxonomy and International Seminar on Changing Scenario in Angiosperm Systematics. Kolhapur, India.
• Norio Tanaka, Marika Ichiyanagi, Josef Bogner and Ryoko Imaichi. 2005. Phylogenetic relationships in Aponogeton (Aponogetonaceae) based on chloroplast DNA sequence data, with implications for the evolution of fenestrated leaves in lace plants. XVII International Botanical Congress (Austria)
• Yu Ito, Norio Tanaka and Koichi Uehara. 2005. Molecular data enable to identify two morphologically like species: endangered species Potamogeton lucens subsp. sinicus var. teganumensis (Potamogetonaceae) and its hybrid. XVII International Botanical Congress (Austria)
• Norio Tanaka, Keiko Aioi, Yuji Omori, Masahiro Nakaoka and John Kuo. 2001.@Molecular phylogenetic analysis of the family Zosteraceae. Proceedings of the 19th Symposium in Plant Biology: Biodiversity-Status, Conservation and Restoration. 268.
• Norio Tanaka, Koichi Uehara, Jin Murata 1998. The relationships between pollen morphology and pollination mechanisms in Hydrocharitaceae. Monocots 2: Second international conference on the comparative biology of the monocotyledons, Sydney, Australia.