日本女子大学 理学部 化学生命科学科
関本研究室（植物生理学研究室）Sekimoto laboratory
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日本女子大学 理学部 化学生命科学科
関本研究室（植物生理学研究室）Sekimoto laboratory

研究業績

(1) 原著論文（査読付英文のみ）

  • Masaki, A., Miyamoto, N., Harshavardhini, S., Nagata, N., Tsuchikane, Y., Sekimoto, H., Kodama, Y., Suzuki, T., Shinomura, T. (2024) Light promotes asexual reproduction and mediates transcriptomic changes in Pediastrum duplex. J. Plant Res., https://doi.org/10.1007/s10265-024-01567-8.
  • Tsuchikane, Y., Watanabe, M., Kawaguchi, Y.W., Uehara, K., Nishiyama, T., Sekimoto, H., Tsuchimatsu, T. (2024)  Diversity of genome size and chromosome number in homothallic and heterothallic strains of the Closterium peracerosum–strigosum–littorale complex (Desmidiales, Zygnematophyceae, Streptophyta). J. Phycol., http://doi.org/10.1111/jpy.13457 .
  • Kawaguchi, Y.W., Tsuchikane, Y., Tanaka, K., Taji, T., Suzuki, Y., Toyoda, A., Ito, M., Watano, Y., Nishiyama, T., Sekimoto, H., Tsuchimatsu, T. (2023) Extensive copy number variation explains genome size variation in the unicellular zygnematophycean alga, Closterium peracerosum-strigosum-littorale complex. Genome Biol. Evol., evad115, https://doi.org/10.1093/gbe/evad115.  
  • Yamamoto, K., Matsuzaki, R., Mahakham, W., Heman, W., Sekimoto, H., Kawachi, M., Minakuchi, Y., Toyoda, A., Nozaki, H. (2023) Expanded male sex-determining region conserved during the evolution of homothallism in the green alga Volvox. iScience, 26: 106893, doi.org/10.1016/j.isci.2023.106893.
  • Sekimoto, H., Komiya, A., Tsuyuki, N., Kawai, J., Kanda, N., Ootsuki, R., Suzuki, Y., Toyoda, A., Fujiyama, A., Kasahara, M., Abe, J., Tsuchikane, Y., Nishiyama, T. (2023) A divergent RWP-RK transcription factor determines mating type in heterothallic Closterium. New Phytol. 237: 1636-1651 Doi/10.1111/nph.18662.
  • Kawai, J., Kanazawa, M., Suzuki, R., Kikuchi, N., Hayakawa, Y., Sekimoto, H. (2022) Highly efficient transformation of the model zygnematophycean alga Closterium peracerosum-strigosum-littorale complex by square-pulse electroporation. New Phytol. 233: 569-578, doi:10.1111/nph.17763
  • Takahashi, K., Kawai-Toyooka, H., Ootsuki, R., Hamaji, T., Tsuchikane, Y., Sekimoto, H., Higashiyama, T., Nozaki, H. (2021) Three sex phenotypes in a haploid algal species give insights into the evolutionary transition to a self-compatible mating system. Evolution 75: 2984-2993, doi:10.1111/evo.14306
  • Rahman, H., Toda, E., Kobayashi, M., Kudo, T., Koshimizu, S., Takahara, M., Iwami, M., Watanabe, Y., Sekimoto, H., Yano, K., Okamoto, T. (2019) Expression of genes from paternal alleles in rice zygotes and involvement of OsASGR-BBML1 in initiation of zygotic development. Plant Cell Physiol. 60: 725-737, pcz030, https://doi.org/10.1093/pcp/pcz030
  • Higo, A., Kawashima, T., Borg, M., Zhao, M., López-Vidriero, I., Sakayama, H., Montgomery, S. A., Sekimoto, H., Hackenberg, D., Shimamura, M., Nishiyama, T., Sakakibara, K., Tomita, Y., Togawa, T., Kunimoto, K., Osakabe, A., Suzuki, Y., Yamato, K. T., Ishizaki, K., Nishihama, R., Kohchi, T., Franco-Zorrilla, J. M., Twell, D., Berger, F., Araki, T. (2018) Transcription factor DUO1 generated by neo-functionalization is associated with evolution of sperm differentiation in plants. Nat. Commun. 9(1) 5283. DOI: 10.1038/s41467-018-07728-3.
  • Tsuchikane, Y., Kobayashi, H., Kato, M., Watanabe, J., Wu, J.-T., Sekimoto, H. (2018) Identification of a new mating group and reproductive isolation in the Closterium peracerosum-strigosum-littorale complex., J. Plant Res. 131(5): 735-746, 10.1007/s10265-018-1043-8.
  • Kanda, N., Ichikawa, M., Ono, A., Toyoda, A., Fujiyama, A., Abe, J., Tsuchikane, Y., Nishiyama, T., Sekimoto, H. (2017) CRISPR/Cas9-based knockouts reveal that CpRLP1 is a negative regulator of the sex pheromone PR-IP in the Closterium peracerosum-strigosum-littorale complex. Sci. Rep. 7: 17873.
  • Yamamoto, K., Kawai-Toyooka, H., Hamaji, T., Tsuchikane, Y., Mori, T., Takahashi, F., Sekimoto, H., Ferris, P.J., Nozaki. H. (2017) Molecular evolutionary analysis of a gender-limited MID ortholog from the homothallic species Volvox africanus with male and monoecious spheroids. PLOS One 12: e0180313.
  • Abe, J., Hori, S., Sato, M., Sekimoto, H. (2016) Concanavalin A disrupts the release of fibrous material necessary for zygote formation of a unicellular charophycean alga, Closterium peracerosum-strigosum-littorale complex. Frontiers in Plant Science, 7: 1040.
  • Abe, J., Hirano, N., Komiya, A., Kanda, N., Fujiwara, A., Hori, S., Tsuchikane, Y., Sekimoto, H. (2016). Preparation of knockdown transformants of unicellular charophycean alga, Closterium peracerosum-strigosum-littorale complex. Bio-protocol 6(10): e1813. http://www.bio-protocol.org/e1813
  • Delaux, P-M., Radhakrishnan, G.V., Jayaraman, D., Cheema, J., Malbreil, M., Volkening, J.D., Sekimoto, H., Nishiyama, T., Melkonian, M., Pokorny, L., Rothfels, C.J., Sederoff, H.W., Stevenson, D.W., Surek, B., Zhang, Y., Sussman, M.R., Dunand, C., Morris, R.J., Roux, C., Wong, G.K-S., Oldroyd, G.E.D., Ané, J-M. (2015) Algal ancestor of land plants was pre-adapted for symbiosis. Proc. Natl. Acad. Sci. USA. 112: 13390-13395.
  • Hirano, N., Marukawa, Y., Abe, J., Hashiba, S., Ichikawa, M., Tanabe, Y., Ito, M., Nishii, I., Tsuchikane, Y., Sekimoto, H. (2015) A Receptor-like kinase, related with cell wall sensor of higher plants, is required for sexual reproduction in the unicellular charophycean alga, Closterium peracerosum-strigosum-littorale complex. Plant Cell Physiol. 56: 1456-1462 (this paper was picked up in the Research Highlight section of this issue).
  • Tsuchikane, Y., Nakai, A., Sekimoto, H. (2014) Detailed analyses on the parthenospore formation in Closterium moniliferum (Zygnematophyceae, Charophyta). Phycologia 53: 571-578
  • Sato, M., Sakayama, H., Sato, M., Ito, M., Sekimoto, H. (2014) Characterization of sexual reproductive processes in Chara braunii (Charales, Charophyceae). Phycol. Res. 62: 214-221.
  • Hiraide, R., Kawai-Toyooka, H., Hamaji, T., Matsuzaki, R., Kawafune, K., Abe, J., Sekimoto, H., Umen, J., Nozaki, H. (2013) The evolution of Male-Female sexual dimorphism predates the gender-based divergence of mating locus gene Mat3/RB. Mol. Biol. Evol. 30: 1038-1040.
  • Hori, S., Sekimoto, H., Abe, J. (2012) Properties of cell surface carbohydrates in sexual reproduction of the Closterium peracerosum-strigosum-littorale complex (Zygnematophyceae, Charophyta). Phycol. Res. 60: 254-260.
  • Tsuchikane, Y., Tsuchiya, M., Hindák, F., Nozaki, H., Sekimoto, H. (2012) Zygospore formation between homothallic and heterothallic strains of Closterium. Sex Plant Reprod. 25: 1-9.
  • Yang, Y., Maruyama, S., Sekimoto, H., Sakayama, H., Nozaki, H. (2011) An extended phylogenetic analysis reveals ancient origin of “non-green” phosphoribulokinase genes from two lineages of “green” secondary photosynthetic eukaryotes: Euglenophyta and Chlorarachniophyta. BMC Research Notes 4: 330.
  • Abe, J., Hori, S., Tsuchikane, Y., Kitao, N., Kato, M., Sekimoto, H. (2011) Stable nuclear transformation of Closterium peracerosum-strigosum-littorale complex. Plant Cell Physiol. 52 (9): 1676-1685.
  • Tsuchikane, Y., Tsuchiya, M., Kokubun, Y., Abe, J., Sekimoto, H. (2011) Conjugation processes of Penium margaritaceum (Zygnematophyceae, Charophyta). Phycol. Res. 59: 74-82.
  • Tsuchikane, Y., Kokubun, Y., Sekimoto, H. (2010) Characterization and Molecular Cloning of Conjugation-regulating Sex Pheromones in Homothallic Closterium. Plant Cell Physiol. 51: 1515-1523.
  • Vannerum, K., Abe, J., Sekimoto, H., Inzé, D., Vyverman, W. (2010) Intracellular localization of an endogenous cellulose synthase of Micrasterias denticulata (Desmidiales, Chlorophyta) by means of transient genetic transformation. J. Phycol. 46: 839-845.
  • Tsuchikane, Y., Sato, M., Ootaki, T., Kokubun, Y., Nozaki, H., Ito, M., Sekimoto, H. (2010) Sexual processes and phylogenetic relationships of a homothallic strain in the Closterium peracerosum-strigosum-littorale complex (Zygnematales, Charophyceae). J. Phycol. 46: 278-284.
  • Yamada, T.K., Tsuchikane, Y., Wu, J.-T., Sekimoto, H., Miyaji, K., Nozaki, H. (2008) Morphology and molecular phylogeny of Eudorina sp. (Volvocaceae, Chlorophyceae) from Taiwan. Hikobia 15: 135-143.
  • Tsuchikane, Y., Ito, M., Sekimoto, H. (2008) Reproductive isolation by sex pheromones in the Closterium peracerosum-strigosum-littorale complex (Zygnematales, Charophyceae). J. Phycol. 44:1197-1203.
  • Abe, J., Hiwatashi, Y., Ito, M., Hasebe, M., Sekimoto, H. (2008) Expression of exogenous genes under the control of endogenous HSP70 and CAB promoters in the Closterium peracerosum-strigosum-littorale complex. Plant Cell Physiol. 49: 625-632.
  • Abe, J., Sakayori, K., Sekimoto, H. (2008) Effect of antibiotics on cell proliferation in the Closterium peracerosum-strigosum-littorale complex (Charophyceae, Chlorophyta). Biologia 63: 932-936.
  • F. Takahashi, Y. Okabe, T. Nakada, H. Sekimoto, M. Ito, H. Kataoka, H. Nozaki (2007) Origins of the secondary plastids of Euglenophyta and Chlorarachniophyta as revealed by an analysis of the plastid-targeting nuclear-encoded gene psbO., J. Phycol. 43: 1302-1309.
  • M. Imaizumi, H. Sekimoto, T. Noguchi (2007) Induction of sex pheromone secretion and observation on the secretary pathway in Closterium peracerosum-strigosum-littorale complex., Plant Sci. 173: 206-212.
  • S. Akatsuka, Y. Tsuchikane, R. Fukumoto, T. Fujii, H. Sekimoto (2006) Physiological characterization of the sex pheromone protoplast-release-inducing protein from the Closterium peracerosum-strigosum-littorale complex (Charophyta)., Phycol. Res. 54: 116-121.
  • Sekimoto, H., Tanabe, Y., Tsuchikane, Y., Shirosaki, H., Fukuda, H., Demura, T., Ito, M. (2006) Gene expression profiling using cDNA microarray analysis of the sexual reproduction stage of the unicellular charophycean alga Closterium peracerosum-strigosum-littorale complex., Plant Physiol. 141: 271-279.
  • Hamada, S., Sekimoto, H., Tanabe, Y., Tsuchikane, Y., Ito, M. (2006) Isolation of myosin XI genes from the Closterium peracerosum-strigosum-littorale complex and analysis of their expression during sexual reproduction., J. Plant Res. 119: 105-113.
  • F. Nakanishi, Y. Nagasawa, Y. Kabaya, H. Sekimoto, K. Shimomura (2005) Characterization of lucidin formation in Rubia tinctorum L., Plant Physiol. Biochem. 43: 921-928.
  • Tsuchikane, Y., Ito, M., Fujii, T., Sekimoto, H. (2005) A sex pheromone, protoplast-release-inducing protein (PR-IP) inducer, induces sexual cell division and production of PR-IP in Closterium., Plant Cell Physiol. 46: 1472-1476.
  • Tanabe, Y., Hasebe, M., Sekimoto, H., Nishiyama, T., Kitani, M., Henschel, K., Münster, T., Theißen, G., Nozaki, H., Ito, M. (2005) Characterization of MADS-box genes in charophycean green alga and its implication for the evolution of MADS-box genes., Proc. Natl. Acad. Sci. USA. 102: 2436-2441.
  • S. Akatsuka, H. Sekimoto, H. Iwai, R. Fukumoto, T. Fujii (2003) Mucilage secretion regulated by sex pheromones in Closterium peracerosum-strigosum-littorale complex, Plant Cell Physiol. 44: 1081-1087.
  • Sekimoto, H., Tanabe, Y., Takizawa, M., Ito, N., Fukumoto, R., Ito, M. (2003) Expressed sequence tags from Closterium peracerosum-strigosum-littorale complex, a unicellular charophycean alga, in the sexual reproduction process, DNA Res. 10: 147-153.
  • R. Fukumoto, T. Fujii, H. Sekimoto (2003) Cloning of a cDNA encoding a sexual cell division-inducing pheromone from a unicellular green alga Closterium ehrenbergii, J. Phycol. 39: 931-936.
  • Y. Tsuchikane, R. Fukumoto, S. Akatsuka, T. Fujii, H. Sekimoto (2003) Sex pheromones that induce sexual cell division in the Closterium peracerosum-strigosum-littorale complex (Charophyta), J. Phycol. 39: 303-309.
  • H. Sekimoto (2002) Production and secretion of a biologically active Closterium sex pheromone by Saccharomyces cerevisiae, Plant Physiol. Biochem., 40: 789-794.
  • R. Fukumoto, N. Dohmae, K. Takio, S. Satoh, T. Fujii, H. Sekimoto (2002) Purification and characterization of a pheromone that induces sexual cell division in the unicellular green alga Closterium ehrenbergii, Plant Physiol. Biochem., 40: 183-188.
  • T. Tada, H. Sekimoto, M. Ohmori (2001) Biochemical characterization of an adenylate cyclase, CyaB1, in the cyanobacterium Anabaena sp. strain PCC 7120. J. Plant Res., 114: 387-394.
  • S. Akaba, M. Seo, N. Dohmae, K. Takio, H. Sekimoto, Y. Kamiya, N. Furuya, T. Komano, T. Koshiba (1999). Production of homo- and hetero-dimeric isozymes from two aldehyde oxidase genes of Arabidopsis thaliana. J. Biochem., 126: 395-401.
  • M. Rebers, T. Kaneta, H. Kawaide, S. Yamaguchi, Y.-Y. Yang, R. Imai, H. Sekimoto, Y. Kamiya (1999) Regulation of gibberellin biosynthesis genes during flower and early fruit development of tomato. Plant J., 17: 241-250.
  • H. Sekimoto, R. Fukumoto, N. Dohmae, K. Takio, T. Fujii, Y. Kamiya (1998) Molecular cloning of a novel sex pheromone responsible for the release of a different sex pheromone in Closterium peracerosum-strigosum-littorale complex. Plant Cell Physiol., 39: 1169-1175.
  • H. Sekimoto, M. Seo, N. Kawakami, T. Komano, S. Desloire, S. Liotenberg, A. Marion-Poll, M. Caboche, Y. Kamiya, T. Koshiba (1998) Molecular cloning and characterization of aldehyde oxidases in Arabidopsis thaliana. Plant Cell Physiol., 39: 433-442.
  • R. Fukumoto, T. Fujii, H. Sekimoto (1998) A newly identified chemotactic sexual pheromone from Closterium ehrenbergii. Sex. Plant Reprod., 11: 81-85.
  • B. Endo, T. Fujii, Y. Kamiya, H. Sekimoto (1997) Analysis of genomic sequences encoding a sex pheromone from the Closterium peracerosum-strigosum-littorale complex. J. Plant Res., 110: 463-467.
  • S. Kamachi, H. Sekimoto, N. Kondo, S. Sakai (1997) Cloning of a cDNA for a 1-aminocyclopropane-1-carboxylate synthase that is expressed during development of female flowers at the apices of Cucumis sativus L. Plant Cell Physiol., 38: 1197-1206.
  • H. Sekimoto, M. Seo, N. Dohmae, K. Takio, Y. Kamiya, T. Koshiba (1997) Cloning and molecular characterization of plant aldehyde oxidase. J. Biol. Chem., 272: 15280-15285.
  • R. Fukumoto, T. Fujii, H. Sekimoto (1997) Detection and evaluation of a novel sexual pheromone that induces sexual cell division of Closterium ehrenbergii (Chlorophyta). J. Phycol. 33: 441-445.
  • T. Toyomasu, H. Kawaide, H. Sekimoto, C. von Numers, A. L Phillips, P. Hedden, Y. Kamiya (1997) Cloning and characterization of a cDNA encoding gibberellin 20-oxidase from rice (Oryza sativa L.) seedlings. Physiol. Plant., 99: 111-118.
  • H. Sekimoto, Y. Sone, T. Fujii (1995) Biochemical, physiological and molecular analysis of sexual isolation in the species complex Closterium peracerosum-strigosum-littorale (Chlorophyta). J. Phycol. 31: 609-613.
  • T. Nojiri, T. Fujii, H. Sekimoto (1995) Purification and characterization of a novel sex pheromone that induces the release of another sex pheromone during sexual reproduction of the heterothallic Closterium peracerosum-strigosum-littorale complex. Plant Cell Physiol. 36: 79-84.
  • H. Sekimoto, Y. Sone, T. Fujii (1994) Regulation of expression of the genes for a sex pheromone by an inducer of the sex pheromone in the Closterium peracerosum-strigosum-littorale complex. Planta 193: 137-144.
  • H. Sekimoto, Y. Sone, T. Fujii (1994) cDNA cloning of 42-kD subunit of protoplast-release-inducing protein from Closterium. Plant Physiol. 104: 1095-1096.
  • H. Sekimoto, Y. Sone, T. Fujii (1994) A cDNA encoding a 19-kD subunit of protoplast-release-inducing protein from Closterium. Plant Physiol. 105: 447-447.
  • H. Sekimoto, Y. Inoki, T. Fujii (1993) Detection and evaluation of an inducer of a diffusible mating pheromone of the heterothallic Closterium peracerosum-strigosum-littorale complex. Plant Cell Physiol. 34: 991-996.
  • H. Sekimoto, S. Satoh, T. Fujii (1993) Analysis of binding of a biotinylated protoplast-release-inducing protein that induces release of gametic protoplasts in the Closterium peracerosum-strigosum-littorale complex. Planta 189: 468-474.
  • H. Sekimoto, T. Fujii (1992) Analysis of gametic protoplast release in the Closterium peracerosum-strigosum-littorale complex (Chlorophyta). J. Phycol. 28: 615-619.
  • H. Sekimoto, S. Satoh, T. Fujii (1990) Biochemical and physiological properties of a protein inducing protoplast release during conjugation in the Closterium peracerosum-strigosum-littorale complex. Planta 182: 348-354.



(2) Reviews and Proceedings（査読付のみ）



(3) 総説と和文原著論文

  • 小林弘佳、関本弘之、土金勇樹（2022）「ヒメミカヅキモ(Closterium peracerosum-strigosum-littorale complex)における交配群II-Cの再発見」Jpn. J. Phycol. 70: 117-123. （査読付）
  • 関本弘之（2012）「単細胞シャジクモ藻類ミカヅキモにおける生殖隔離、種分化機構の研究」IFO Research communications　26巻、71-85.
  • 土金勇樹、関本弘之（2012）「ミカヅキモの生殖について」海洋と生物　34巻、5号、426-434.
  • 坂山英俊、西山智明、関本弘之、伊藤元己 (2009)Biophilia 5: 69–72.「陸上植物の祖先「シャジクモ藻類」の進化学　水中から陸上へのストーリー」
  • 関本弘之（2002）「私のおすすめ実験生物　—ミカヅキモー」細胞工学　21巻、10号、1232-1233.
  • 関本弘之、福本亮平（1999）「Closteriumの性フェロモン」植物の化学調節　34巻、2号、305-315.
  • H. Sekimoto, T. Fujii (1993) Mode of induction of gametic protoplast-release by a proteinaceous sex pheromone in Closterium peracerosum-strigosum-littorale complex. In proceedings of a JSPS-NUS Seminar, pp 17-24.
  • 関本弘之、藤伊　正（1993）「ミカヅキモの有性生殖に関わる細胞間情報交換」生物の科学　遺伝　47巻、1号、43-48.
  • 関本弘之、藤伊　正（1991）「微細藻類の有性生殖　ーその生理生化学的側面」Cell Science 7巻、7号、562-571.



(4) 著書

  • Mechanism of sexual reproduction in fresh water microalgae (Sekimoto, H., Abe, J., Tsuchikane, Y.). In “Reproductive Biology of Plants”, Ramawat, K.G., Merillon, J.M., Shivanna, K.R. eds. CRC Press (2014).
  • 分担執筆「動植物の受精学」（澤田均　編）、化学同人（2014） 　4章　藻類の有性生殖（野崎久義、関本弘之、pp. 60-75）
  • Sexual reproduction of a unicellular charophycean alga, Closterium peracerosum-strigosum-littorale complex (Sekimoto, H., Tsuchikane, Y., Abe, J.). In “Sexual Reproduction in Animals and Plants”, Sawada, H, Inoue, N., Iwano, M. eds. Springer (2014).
  • New insights into the regulation of sexual reproduction in Closterium (Sekimoto, H., Abe, J., Tsuchikane, Y.). In “International review of cell and molecular biology”, Jeon, K.W. ed. Academic Press, vol. 297: 309-338 (2012).
  • 分担執筆「細胞生物学実験法」（野村浩二　編著）、朝倉書店（2007）   8.5　免疫応答の利用（土金勇樹、関本弘之、PP. 137-141)
  • 分担執筆「細胞生物学実験法」（野村浩二　編著）、朝倉書店（2007）　8.4　タンパク質の解析（関本弘之、PP. 133-137)
  • Plant Sex Pheromones. In “Plant Hormones: A volume of Vitamins and Hormones”, Litwack, G. ed. ELSEVIER Inc., vol. 72: 457-478 (2005).
  • 分担執筆「花」- 性と生殖の分子生物学（日向　康吉　編著）、学会出版センター（2001).
  • 分担翻訳「植物生理学」H. Mohr, P. Schopfer 著（網野真一・駒嶺　穆　監訳）、Springer-Verlag (1998)



(5) 招待講演（国内学会）

  • 関本弘之「ヒメミカヅキモのゲノム解読と緑色植物特異的転写因子RWP-RKの機能」日本植物学会第87回大会（札幌+オンライン）シンポジウム「いまストレプト藻類が熱い：多様なストレプト藻類から陸上植物をみる」2023年9月8日
  • Hiroyuki Sekimoto, Natsumi Tsuyuki, Ayumi Komiya, Tomoaki Nishiyama 「The mechanism of mating type determination in heterothallic strains of Closterium peracerosum-strigosum-littorale complex, a new model organism to study sexual reproduction in streptophytes」第43回日本分子生物学会年会（オンライン）シンポジウム「コケ植物とシャジクモ藻類から陸上植物を探る」2020年12月2日
  • 関本弘之「シャジクモ藻類ヒメミカヅキモのモデル植物化」第82回日本植物学会（広島国際会議場）シンポジウム「新規モデル植物を作ろう：ゲノム解読と形質転換系の確立」2018年9月15日
  • 関本弘之「シャジクモ藻類ヒメミカヅキモの性決定機構の解析」第80回日本植物学会（沖縄・沖縄コンベンションセンター）シンポジウム「ゲノム解析から見えてきた性の多様性と共通性」2016年9月16日
  • Hiroyuki Sekimoto「Sexual reproduction and sex determination of green algae」第79回日本植物学会（新潟大学）シンポジウム “Fusion” in Fertilization: Interdisciplinary Collaboration among Plant and Animal Scientists, 2015年9月7日
  • 関本弘之「シャジクモ藻類ヒメミカヅキモの有性生殖機構」第84回日本動物学会（岡山大学）シンポジウム「受精機能と生殖戦略の進化　〜藻類から脊椎動物まで」2013年9月26日
  • 関本弘之、平野直子、大槻涼、川井絢子、土金勇樹、西山智明、阿部淳「シャジクモ藻類ヒメミカヅキモの有性生殖制御」第77回日本植物学会（北海道大学）シンポジウム「アルガルセックス：有性生殖と生活環制御が切り拓く藻類バイオの新戦略」2013年9月13日
  • 関本弘之「ミカヅキモの有性生殖に関わる細胞間情報伝達機構の解析」第7回化学生態学研究会（湯の川プリンスホテル渚亭）2012年6月30日
  • 阿部淳、関本弘之「藻類の遺伝子操作の現状と課題 ―単細胞シャジクモ藻類ヒメミカヅキモを例として―」第53回日本植物生理学会（京都産業大学）シンポジウム「微細藻類による燃料生産:実現への課題と生物学からの解決策」2012年3月18日
  • 西山智明、阿部　淳、土金勇樹、坂山英俊、 関本弘之「次世代シーケンサーデータのde novoアセンブリー解析」第53回日本植物生理学会（京都産業大学）シンポジウム「次世代シーケンサーによる高速分子遺伝学」2012年3月17日
  • 阿部 淳、西山 智明、関本弘之「単細胞シャジクモ藻類ヒメミカヅキモのゲノミクス」日本植物学会（東京大学）シンポジウム「ゲノム解析によって解き明かされる植物の多様性」2011年9月18日
  • 西山智明、関本弘之、坂山英俊「参照配列無し短リード塩基配列の情報解析」日本植物学会（東京大学）シンポジウム「ケノム解析によって解き明かされる植物の多様性」2011年9月18日
  • 関本弘之「シャジクモ藻類ヒメミカヅキモの有性生殖に関わる性フェロモン」日本植物学会シンポジウム「藻類から解き明かされる生殖と発生の原理」（高知）、2008年9月
  • 関本弘之「ヒメミカヅキモの有性生殖解明に向けての分子生物学的アプローチ」NBRP藻類ワークショップ「藻類の多様性と分子生物学」（東京）、2007年3月
  • 関本弘之、福本亮平「ミカヅキモの有性生殖システム」日本植物学会シンポジウム「緑藻類の生殖システムの多様性と進化を考える」（東京）、2001年9月
  • 関本弘之「ミカヅキモの有性生殖に関わる細胞間情報伝達機構の解析」日本植物学会奨励賞受賞講演（広島）、1998年9月
  • 関本弘之、藤伊　正「藻類の生殖時におけるコミュニケーション」日本生化学会シンポジウム「植物のコミュニケーション」（仙台）、1995年9月
  • 藤伊　正、関本弘之「藻類の生殖時におけるコミュニケーション」重点領域研究（高等植物における雌雄の分化・受粉過程の遺伝解剖的吟味）公開シンポジウム、1995年7月

(6) 招待講演（国際会議）

  • Sekimoto, H. “Transformation, whole genome, mating-type determination, and RWP-RK genes in the heterothallic Closterium peracerosum-strigosum-littorale complex, a new model streptophyte alga” Workshop in Streptophyte Algae, Wageningen, the Netherlands, 15-16 May, 2023.
  • Sekimoto, H., Tsuyuki, N., Komiya, A., Nishiyama, T. “The mechanism of mating type determination in heterothallic strains of Closterium peracerosum-strigosum-littorale complex, a new model organism to study sexual reproduction in streptophytes” The SEB satellite meeting "Algal model systems on the rise: understanding and exploiting the algae to land plant transition", Seville, Spain, June 30, 2019.
  • Sekimoto, H. “New insights into the sexual reproduction in unicellular zygnematophycean alga, Closterium peracerosum-strigosum-littoralecomplex” The 65th NIBB Conference Marchantia Workshop 2017 “Renaissance of Marchantia polymorpha – the genome and beyond”, Okazaki, Aichi, December 17, 2017.
  • Sekimoto, H., Hirano, N., Marukawa, Y., Tsuchikane, Y., Abe, J. “Intercellular communication in sexual reproduction of a unicellular charaphycean alga, Closterium peracerosum-strigosum-littorale complex” International Symposium on the Mechanisms of Sexual Reproduction in Animals and Plants, Nagoya, November 16, 2012.
  • Abe, J., Sakayama, H., Suzuki, Y., Toyoda, A., Tsuchikane, Y., Sekimoto, H., Nishiyama, T. “Closterium and Chara genome and transcriptome analyses.” The International Plant & Animal Genome XX Conference, San Diego, CA, USA, January 14, 2012.
  • Sekimoto, H. “Sexual Reproduction of a Unicellular Alga, Closterium” International Symposium of Intercellular Recognition and Allogeneic Authentication: Perspectives of Reproduction and Mechanisms Shared by Animals and Plants, Nagoya, January 14, 2010.
  • Sekimoto, H. “Biologically active molecules involved in the sexual reproduction of Closterium peracerosum-strigosum-littorale complex” The Ninth international phycological congress, Tokyo, Japan, August 2009.
  • Tsuchikane, Y., Sekimoto, H. “Biological speciation in Closterium (Zygnematales, Charophyceae): Reproductive isolation by sex pheromones” The Vth Asian Pacific Phycological Forum, (Wellington, New Zealand), November 2008.
  • Sekimoto, H., Tanabe, Y., Tsuchikane, Y., Fukuda, H., Demura, T.,  Ito, M. “Genes relating to the sexual reproduction of a unicellular charophycean alga, Closterium peracerosum-strigosum-littorale complex, identified by microarray analysis” 4th Asian Pacific Phycological Forum, (Bangkok, Thailand), October 2005.
  • Sekimoto, H., Tsuchikane, Y., Akatsuka, A., Fukumoto, R., Fujii, T. "Sexual reproduction of Closterium peracerosum-strigosum-littorale complex: physiological, biochemical and molecular biological approaches." 3rd Asian Pacific Phycological Forum, (Tsukuba, Japan), July 2002.
  • Fukumoto, R., Sekimoto, H. "Sex pheromones in Closterium." International Symposium of the Asian Pacific Phycological Assoiation (Yamagata), June 2001.
  • Sekimoto, H. "Intercellular communication by proteinous pheromones during sexual reproduction of Closterium." 16th International Conference on Plant Growth Substances (Chiba), August 1998.
  • Sekimoto, H., Fujii, T. "Intercellular communication by novel sex pheromones during sexual reproduction of the heterothallic Closterium peracerosum-strigosum-littorale complex." Japan-French Workshop (ENS-LYON, France), November 1995.
  • Sekimoto, H., Fujii, T. "Mode of induction of gametic protoplast-release by a proteinaceous sex pheromone in Closterium peracerosum-strigosum-littorale complex." JSPS-NUS Seminar (Tsukuba), August 1993.
  • Sekimoto, H. Satoh, S., Fujii, T. "Biochemical and physiological properties of a gametic protoplast-release-inducing protein in Closterium." Second Japan-Korea Symposium on Phycology (Tsukuba), September 1991.

(7) その他

  • Best Student Poster Awards in the 6th Asian Pacific Phycological Forum (2011)
    S.Hori, J. Abe, H. Sekimoto "Effect of lectin on the sexual reproduction of Closterium peracerosum-strigosum-littorale complex"
  • 2009年度　日本植物分類学会口頭発表賞「接合藻ヒメミカヅキモの生殖隔離：　性フェロモン（PR-IP）の認識低下による非対称な生殖隔離」（土金勇樹、関本弘之)
  • Rising Sun Award in 16th International Conference on Plant Growth Substances (1998)
    R. Fukumoto, T. Fujii, H. Sekimoto "Newly identified two sexual pheromones in Closterium ehrenbergii"
  • 1998年度　日本植物学会奨励賞受賞「ミカヅキモの有性生殖に関わる細胞間情報伝達機構の解析」（関本弘之）



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