Centers & Labs

RIKEN Center for Sustainable Resource Science

Dormancy and Adaptation Research Unit

Unit Leader: Mitsunori Seo (D.Sci.)
Mitsunori  Seo(D.Sci.)

Our unit studies the mechanisms that regulate plant adaptation responses such as seed dormancy, germination and stress responses. We will reveal how biosynthesis and transport of plant hormones such as abscisic acid, gibberellin and jasmonates are regulated. We will optimize plant adaptation responses by genetic and chemical regulation of hormone transport and biosynthesis.

Main Research Field


Related Research Fields

Agricultural sciences

Research Subjects

  • Identification and functional characterization of plant hormone transporters
  • Elucidation of the mechanisms that regulate hormone biosynthesis
  • Identification of the factors that regulate seed dormancy and germination

Selected Publications

Papers with an asterisk(*) are based on research conducted outside of RIKEN.
  1. Maekawa, M., Honoki, R., Ihara, Y., Sato, R., Oikawa, A., Kanno, Y., Ohta, H., Seo, M., Saito, K. and Masuda, S.:
    "Impact of the plastidial stringent response in plant growth and stress responses"
    Nat Plants 1, 15167 (2015)
  2. Mega, R., Meguro-Maoka, A., Endo, A., Shimosaka, E., Murayama, S., Nambara, E., Seo, M., Kanno, Y., Abrams, S.R. and Sato, Y.:
    "Sustained low abscisic acid levels increase seedling vigor under cold stress in rice (Oryza sativa L.)"
    Sci Rep 9, 13819 (2015)
  3. Mutuku, J.M., Yoshida, S., Shimizu, T., Ichihashi, Y., Wakatake, T., Takahashi, A., Seo, M., and Shirasu, K.:
    "The WRKY45-dependent signaling pathway is required for resistance against Striga hermonthica parasitism"
    Plant Physiol 168, 1152-63 (2015)
  4. Shimizu, T., Miyakawa, S., Esaki, T., Mizuno, H., Masujima, T., Koshiba, T. and Seo, M.:
    "Live single cell plant hormone analysis by video-mass spectrometry"
    Plant Cell Physiol 56, 1287-1296 (2015)
  5. Chiba, Y., Shimizu, T., Miyakawa, S., Kanno, Y., Koshiba, T., Kamiya, Y. and Seo, M.:
    "Identification of Arabidopsis NRT1/PTR FAMIRY (NPF) proteins capable of transporting plant hormones"
    J Plant Res 128, 679-686 (2015)
  6. Saito, H., Oikawa, T., Hamamoto, S., Ishimaru, Y., Kanamori-Sato, M., Sasaki-Sekimoto, Y., Utsumi, T., Chen, J., Kanno, Y., Masuda, S., Kamiya, Y., Seo, M., Uozumi, N., Ueda, M. and Ohta, H.:
    "The jasmonate-responsive GTR1 transporter is required for gibberellin-mediated stamen development in Arabidopsis"
    Nat Commun 6, 6095 (2015)
  7. Léran, S., Varala, K., Boyer, J.C., Chiurazzi, M., Crawford, N., Daniel-Vedèle, F., David, L., Dickstein, R., Fernandez, E., Forde, B., Gassmann, W., Geiger, D., Gojon, A., Gong, J.M., Halkier, B.A., Harris, J.M., Hedrich, R., Limami, A.M., Rentsch, D., Seo, M., Tsay, Y.F., Zhang, M., Coruzzi, G., Lacombe, B.:
    "A unified nomenclature of NITRATE TRANSPORTER 1/PEPTIDE TRANSPORTER family members in plants"
    Trends Plant Sci 19, 5-9 (2014)
  8. Yano, R., Takebayashi, Y., Nambara, E., Kamiya, Y. and Seo, M.:
    "Combining association mapping and transcriptomics identify HD2B histone deacetylase as a genetic factor associated with seed dormancy in Arabidopsis thaliana"
    Plant J 74, 815-828 (2013)
  9. Kanno, Y., Hanada, A., Chiba, Y., Ichikawa, T., Nakazawa, M., Matsui, M., Koshiba, T., Kamiya, Y. and Seo, M.:
    "Identidication of an abscisic acid transporter by functional screening using the receptor complex as a sensor"
    Proc Natl Acad Sci USA 109, 9653-9658 (2012)
  10. Kanno, Y., Jikumaru, Y., Hanada, A., Nambara, E., Abrams, S.R., Kamiya, Y. and Seo, M.: "Comprehensive hormone profiling in developing Arabidopsis seeds: examination of the site of ABA biosynthesis, ABA transport and hormone interactions"
    Plant Cell Physiol 51, 1988-2001 (2010)

Lab Members

Principal Investigator

Mitsunori Seo
Unit Leader

Core Members

Naoto Sano
Special Postdoctoral Researcher
Takafumi Shimizu
Postdoctoral Researcher
Shunsuke Watanabe
Visiting Researcher
Yuri Kanno
Technical Staff II

Contact information

C614 Central Research Building 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama City, Kanagawa, 230-0045, Japan

Email: mitsunori.seo [at]

Related links

Recent research results

March 31, 2017: RIKEN RESEARCH
Protein study brings sweet success