Role of temperature, light and date: seeds were exhumed from soil on germination of four wetland perennials

J. M. Baskin, C. C. Baskin, D. M. Spooner

Research output: Contribution to journalArticlepeer-review

48 Scopus citations

Abstract

Seeds of the four wetland perennials Cyperus odoratus L., Gratiola viscidula Pennell, Penthorum sedoides L. and Scirpus lineatus Michx. were buried in soil and exposed to yearly seasonal temperature cycles. At monthly intervals for 30.5 or 31 months, seeds were exhumed and tested at daily alternating (12/12 h) temperature regimes of 15/6, 20/10, 25/15, 30/15 and 35/20°C in light (14 h photoperiod) and darkness. Seeds of all species had an absolute light requirement for germination. Freshly matured seeds of C. odoratus and P. sedoides were conditionally dormant, while those of G. viscidula and S. lineatus were dormant. Seeds of all species became non-dormant during winter; however, those of C. odoratus and G. viscidula never gained the ability to germinate at 15/6°C. Buried seeds of C. odoratus and P. sedoides remained non-dormant during the remainder of the study, while those of G. viscidula and S. lineatus exhibited an annual conditional dormancy/non-dormancy cycle.

Original languageEnglish
Pages (from-to)387-394
Number of pages8
JournalAquatic Botany
Volume35
Issue number3-4
DOIs
StatePublished - Nov 1989

ASJC Scopus subject areas

  • Aquatic Science
  • Plant Science

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