Yujin Park

Yujin Park

Telephone: (517) 353-0453

Department of Horticulture

PhD Graduate Research Assistant


I am pursuing a doctoral degree in Horticulture under Dr. Erik Runkle's guidance. My research focuses on optimizing the radiation spectrum of sole-source light-emitting diodes (LEDs) for plant growth and quality during young ornamental plant production. There's been a fundamental shift of incorporating LEDs into commercial controlled-environment agriculture due to their high energy efficiency, longevity, and waveband specificity. Using a mixture of red and blue radiation for sole-source LED lighting has been widely considered desirable from plant growth and energy efficiency perspective. However, this limited radiation combination is not necessarily optimized for many plant growth applications as well as is difficult for people to see plants to evaluate growth. During my Ph.D. research, I will investigate the impacts of using additional narrow- or broad-band lighting, including far-red and white, to improve growth and quality attributes of young ornamental plants. Also, the underlying mechanisms of the spectral quality manipulations will be identified based on thorough photosynthesis and plant morphology study.


  • Ph.D. Michigan State University, Horticulture (MSU), 2018 (expected)
  • M.S. Seoul National University (SNU), Horticultural Science, 2013
  • B.S. Yonsei University, Architectural Engineering, 2011

Honors and Awards

  • Future Academic Scholars in Teaching Fellowship, 2016
  • John L. Arend Excellence in Graduate Student Research Scholarship, 2016
  • American Society for Horticultural Science (ASHS) Graduate Ph.D. Student Poster Competition Second Place, 2015
  • ASHS Travel Grant, 2015
  • NCERA-101 Travel Grant, 2015
  • MSU Graduate Office Fellowship in the Department of Horticulture, 2015
  • John L. Arend Excellence in Graduate Student Research Scholarship, 2015
  • Outstanding Award of Oral Presentation, Annual Conference of the Korean Society for Horticultural Science, 2012

Research Experience

  • Ph.D. Research Assistant, Department of Horticulture, MSU, 2014-present
  • Research Associate, Research Institute for Agriculture and Life Sciences, SNU, 2013-2014
  • M.S. Research Assistant, Department of Horticultural Science, SNU, 2011-2013

Refereed Publications

  • Park, Y. and E.S. Runkle. 2017. Far-red radiation promotes growth of seedlings by increasing leaf expansion and whole-plant net assimilation. Environ. Exp. Bot. 136:41-49.
  • Park, Y. and E.S. Runkle. 2016. Investigating the merit of including far-red radiation in the production of ornamental seedlings grown under sole-source lighting. Acta Hortic. 1134:259-266
  • An, H.R, Y.J. Kim, Y. Park, and K.S. Kim. 2015. Night interruption promotes subsequent cut flower quality in Cymbidium ‘Red Fire'. Hort. Environ. Biotechnol. 56:455-461.
  • Kim, Y.J., Y. Park, and K.S. Kim. 2015. Night interruption promotes flowering and improves flower quality in Doritaenopsis Orchid. Flower. Res. J. 23:6-10.
  • Hong, Y.Y., Y. Park, Y.J. Kim, and K.S. Kim. 2014. Vegetative growth and flowering of Salvia splendens 'Salsa' in response to night interruption. Kor. J. Hort. Sci. Technol. 32:434-439.
  • Park, Y., Y.J. Kim, and K.S. Kim. 2013. Vegetative growth and flowering of Dianthus, Zinnia, and Pelargonium as affected by night interruption at different timings. Hort. Environ. Biotechnol. 54:236-242.

Extension Articles


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