Germination of Viburnum odoratissimum seeds: A new level of morphophysiological dormancy

Carol C. Baskin, Ching Te Chien, Shun Ying Chen, Jerry M. Baskin

Research output: Contribution to journalArticlepeer-review

45 Scopus citations

Abstract

Previous studies indicated that seeds of Viburnum odoratissimum had only physiological dormancy (PD), but no measurements of embryos were made during the dormancy-break treatments. Thus, we investigated embryo growth and radicle and cotyledon emergence over a range of temperatures. Seeds have underdeveloped embryos, and their length increased about 300% before radicle emergence. Embryos also had PD, as evidenced by delays in beginning of embryo growth (2-3 weeks) and of germination after embryos were elongated (4 weeks). After radicle emergence, epicotyl emergence was delayed 1-8 weeks, depending on incubation temperature, but cold stratification was not required to break PD of the epicotyl. Unlike seeds of many previously studied Viburnum spp., epicotyls of V. odoratissimum have non-deep, rather than deep, PD. Hence, a new level of MPD called non-deep, simple, epicotyl MPD has been identified.

Original languageEnglish
Pages (from-to)179-184
Number of pages6
JournalSeed Science Research
Volume18
Issue number3
DOIs
StatePublished - Sep 2008

Keywords

  • Epicotyl dormancy
  • Morphophysiological dormancy
  • Seed dormancy
  • Seed germination
  • Viburnum

ASJC Scopus subject areas

  • Plant Science

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