KOI Satoshi


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Research Areas 【 display / non-display

Evolutionary Morphology of Plants

Current Career 【 display / non-display

  • Osaka City University   Graduate School of Science   Biology and Geosciences Course   Lecturer  


Published Papers 【 display / non-display

  • Paraphyletic Species of Podostemaceae: Cladopus fallax and Polypleurum wallichii

    Kato Masahiro, Werukamkul Petcharat, Won Hyosig, Koi Satoshi

    PHYTOTAXA  401 ( 1 ) 33 - 48 2019.04  [Refereed]


  • Two new genera of Podostemaceae from northern Central Laos: saltational evolution and enigmatic morphology

    Koi Satoshi, Won Hyosig, Kato Masahiro

    JOURNAL OF PLANT RESEARCH  132 ( 1 ) 19 - 31 2019.01  [Refereed]

    DOI PubMed

  • Three New Species of Hydrobryum (Podostemaceae) from Laos

    Koi Satoshi, Kato Masahiro

    日本植物分類学会 ACTA PHYTOTAXONOMICA ET GEOBOTANICA  70 ( 1 ) 29 - 39 2019  [Refereed]

     View Summary

    Three new species of <i>Hydrobryum </i>(Podostemaceae) from central Laos are described. These species, like most other congeners, share crustose roots, but differ in the characteristics of the bract, spathella, stamen, and/or ovary locule. Their recognition as distinct was supported by molecular phylogenetic analyses. As a result, 16 species of <i>Hydrobryum </i>occur in Laos and 33 species occur throughout southeastern and eastern Asia.

    DOI CiNii

  • Two new species of Hydrobryum (Podostemaceae) from Laos

    Koi Satoshi, Kato Masahiro

    KEW BULLETIN  73 ( 4 )  2018.12  [Refereed]


  • Molecular and morphological variation in Terniopsis (Podostemaceae) show contrasting patterns

    Koi Satoshi, Won Hyosig, Hung Tran, Ampornpan La-aw, Kato Masahiro

    NORDIC JOURNAL OF BOTANY  36 ( 11 )  2018.11  [Refereed]


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Books etc 【 display / non-display

  • 水草の疑問 50

    水草保全ネットワーク (Part: Single Work )

    成山堂書店  2018.10

  • 人と植物の共生ー都市の未来を考えるー

    飯野 盛利 他 (Part: Single Work )

    大阪市立大学国際学術シンポジウム「人と植物の共生ー都市の未来を考えるー」組織委員会  2018.02

Review Papers (Misc) 【 display / non-display

  • Glossy white flowers of Gentiana squarrosa Ledeb., Gentianaceae

    17 ( 2 ) 185 - 187 2017  [Refereed]  [Invited]

  • 白花のコケリンドウ

    橋本 利清,岡田 博,厚井 聡

    分類  17 ( 2 ) 185 - 187 2017  [Refereed]  [Invited]

  • Gene expression analysis of aquatic angiosperms Podostemaceae to gain insight into the evolution of their enigmatic morphology. In: Ive De Smet (ed) Plant organogenesis, methods and protocols

    Satoshi Koi, Natsu Katayama

    Humana Press    83 - 95 2013.01  [Refereed]  [Invited]

  • Gene expression analysis of aquatic angiosperms Podostemaceae to gain insight into the evolution of their enigmatic morphology. In: Ive De Smet (ed) Plant organogenesis, methods and protocols

    Satoshi Koi, Natsu Katayama

    Humana Press    83 - 95 2013.01

  • 器官の中身と器を入れ替える進化—カワゴケソウの奇妙な形態形成

    厚井 聡

    生物の科学 遺伝  67 ( 1 ) 63 - 68 2013  [Refereed]  [Invited]

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Conference Activities & Talks 【 display / non-display

  • ラオス産カワゴケソウ科植物がもつ奇妙な軸状器官の相同性の解明


    日本植物学会第82回大会(広島)  2018.09 

  • カワゴケソウ科の生態的住み分けに関する研究

    Petcharat Werukamkul,La-aw Ampornpan,加藤雅啓,厚井聡

    日本植物分類学会第17回大会(金沢)  2018.03 

  • 茎頂を欠いたカワゴケソウ科カワゴロモ属における単子葉性の進化


    日本植物学会第81回大会(野田)  2017.09 

  • カワゴケソウ科に見られる特異な分枝


    日本植物学会第80回大会(沖縄)  2016.09 

  • Evolution of root morphology in Podostemaceae.

    Satoshi Koi, Ryoko Imaichi, Masahiro Kato

    Contribution of Genetics to Plant Conservation, Brazil - Japan International Workshop 2015 (Piracicaba)  2015.02 

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Grant-in-Aid for Scientific Research 【 display / non-display

  • Studies on the evolution of foliose root with the loss of apical growth

    Project/Area Number : 26870502  Grant-in-Aid for Young Scientists(B) Representative

    Project Year :


     View Summary

    Morphological evolution of root in aquatic angiosperm family Podostemaceae was studied. The evolution of root branching from endogenous to exogenous development occurred within the African Podostemoideae independently to the Asia clade. It is suggested that the evolution of crustose root involved the transition of root branching. On the other hands, subcylindrical roots evolved three times from crustose roots within Lao Hydrobryum. New species was found in Laos and the homology of its enigmatic organs was hard to identify.

  • Genetic Analyses of Morphological Diversity in Podostemaceae adapted to Extreme Environments

    Project/Area Number : 25291091  Grant-in-Aid for Scientific Research(B) Partaker / Other

    Project Year :


    Partaker : KATAYAMA Natsu, NISHIYAMA Tomoaki, KOI Satoshi, YAMADA Toshihiro

     View Summary

    An evolutionary biological theory claims that the evolution of morphology is neutral under no or little pressure of selection. It may be possible that neutral evolution of morphology is involved in the diversification of the aquatic flowering plant family Podostemaceae living in extreme habitats with no or few competitors. In comprehensive analyses of genes, we found high synonymous substitution rates or mutation rates, and also numerous nonsynonymous substitutions.It may be likely therefore that Podostemaceae evolved in a condition of relaxed negative selection. We also found four monocotyledonous species in Hydrobryum, and the evolution of monocotyly is recurrent. In a monocotyledonous species, unusual cell divisions take place in an early stage of embryogenesis.

  • Mechanisms regulating early embryogenesis in Arabidopsis thaliana

    Project/Area Number : 24370022  Grant-in-Aid for Scientific Research(B) Partaker / Other

    Project Year :


    Partaker : KIM Jong-Myong, ENDO Takaho, KOI Satoshi, HISANAGA Tetsuya, FURUTA Kaori, KOHCHI Takayuki, SHIMAMURA Masaki, YAMATO Katsuyuki, ISHIZAKI Kimitsune, LUKOWITZ Wolfgang

     View Summary

    Mechanisms regulating early phases of plant embryogenesis are poorly understood. We have previously identified a member of the plant-specific RKD transcription factors, RKD4, as a regulator of early embryogenesis in Arabidopsis thaliana. The present study revealed that RKD4 directly binds to the genomic DNAs of many genes including known regulators of embryogenesis, and thereby regulates their expression. In addition, genetic studies using liverworts and Arabidopsis indicated that RKD factors are evolutionarily conserved regulators of germ cell differentiation in land plants.


Foreigner acceptance 【 display / non-display

  • Academic year : 2017

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    Number of foreigners accepted