Skip to main content
Stratification and Light Improve Germination of Katsura Tree Seed
  • Michael S. Dosmann, Iowa State University
  • Jeffery K. Iles, Iowa State University
  • Mark P. Widrlechner, United States Department of Agriculture
Document Type
Publication Version
Published Version
Publication Date
Germinability of two, half-sib seed sources of Cercidiphyllum japonicum Sieb. & Zucc. and one seed source of Cercidiphyllum magnificum (Nakai) Nakai was determined after not stratifying or stratifying seeds at 3.5 ± 0.5 °C (38.3 ± 0.9 °F) for 8 days followed by germination for 21 days at 25 °C (77 °F) in darkness or under a 15-hour photoperiod. Stratification was not required for germination, but increased germination percentage, peak value, and germination value for both species. Stratification increased germination of C. japonicum from 42% to 75%, and germination of C. magnificum from 12% to 24%. Light enhanced germination of nonstratified seeds of one source of C. japonicum and of C. magnificum from 34% to 52% and from 8% to 15%, respectively. Stratification improved germinability of both species and obviated any preexisting light requirements the seeds may have had.

This article is from HortTechnology 10 (2000): 571.

Works produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted.
File Format
Citation Information
Michael S. Dosmann, Jeffery K. Iles and Mark P. Widrlechner. "Stratification and Light Improve Germination of Katsura Tree Seed" HortTechnology Vol. 10 Iss. 3 (2000) p. 571 - 573
Available at: