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

  • 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

  • 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

    Satoshi Koi, Hyosig Won, Hùng Trần, La-aw Ampornpan, Masahiro Kato

    Nordic Journal of Botany  2018.08  [Refereed]

  • Three New Species of Hydrobryum (Podostemaceae) from Laos

    Satoshi Koi, Masahiro Kato

    Acta Phytotaxonomica et Geobotanica  2018  [Refereed]

  • Two rare species of Hydrobryum from Laos (Podostemaceae).

    Satoshi Koi, Masahiro Kato

    Kew Bulletin  2018  [Refereed]

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Review Papers (Misc) 【 display / non-display

  • Glossy white flowers of Gentiana squarrosa Ledeb., Gentianaceae

    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

  • Gene expression analysis on enigmatic shoots in Podostemaceae

    Satoshi Koi, Natsu Katayama

    24   73 - 80 2012

  • Morphological evolution of Podostemaceae

    11 ( 2 ) 109 - 119 2011

  • Developmental morphological and evolutionary studies on shoots in some species of Podostemaceae

    6 ( 2 ) 165 - 168 2006

Conference Activities & Talks 【 display / non-display

  • 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 

  • Functions of the RKD gene family in reproduction of basal land plant Marchantia polymorpha.

    Satoshi Koi, Masaki Shimamura, Kimitsune Ishizaki, Takayuki Kohchi, Keiji Nakajima

    Marchantia Workshop 2014 (Kobe)  2014.12 

  • Evolutionarily conserved role of RKD gene family in land plant reproduction.

    Satoshi Koi, Kimitsune Ishizaki, Takayuki Kohchi, Keiji Nakajima

    Marchantia Workshop IV (Melbourne)  2013.12 

  • Adaptive evolution and diversification of body plan in river-weed Podostemaceae.

    Satoshi Koi  [Invited]

    Environmental Adaptation and Speciation of Plants and Fungi (Tokyo)  2012.10 

  • Evolutionary insights into the RKD gene function in the development of land plants.

    Satoshi Koi, Kimitsune Ishizaki, Takashi Hashimoto, Takayuki Kohchi, Keiji Nakajima

    A New Generation of Plant Embryo Research (Nara)  2012.10 

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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