Physiological dormancy in seeds of tropical montane woody species in Hawai`i

Carol C. Baskin, Jerry M. Baskin, Alvin Yoshinaga, Dustin Wolkis

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

Worldwide, there is relatively little information on seed dormancy and germination of tropical montane species. Our aim was to help fill this knowledge gap by conducting seed dormancy/germination studies on woody species from this vegetation zone in Hawai`i. All species had water-permeable seeds with a fully developed embryo. Seeds of 29 species (23 genera) were incubated in light/dark at 15/6, 20/10 and 25/15°C and germination monitored at 2-week intervals for 16–128 weeks. Seeds of Chenopodium oahuense, Dubautia menziesii and Silene lanceolata were non-dormant (ND) and those of 26 other species had physiological dormancy (PD); 10 of the 26 species had conditional PD. The optimum germination temperature regime(s) was (were) 25/15°C, 17 species; 25/10 and 20/10°C, 2; 20/10°C, 6; 20/10 and 15/6°C, 2; and 15/6°C, 2. Worldwide, PD in the woody genera included in our study is more common than ND. In addition to its contribution to the world biogeography of seed dormancy/germination, this study will be useful to conservation biologists who need to germinate seeds of tropical montane species.

Original languageEnglish
Pages (from-to)60-71
Number of pages12
JournalPlant Species Biology
Volume36
Issue number1
DOIs
StatePublished - Jan 2021

Bibliographical note

Publisher Copyright:
© 2020 The Society for the Study of Species Biology

Keywords

  • conditional dormancy
  • fully developed embryo
  • non-dormant seeds
  • physiological dormancy
  • tropical montane zone

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Ecology
  • Plant Science

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