A review of the relationship between primary and secondary dormancy, with reference to the volunteer crop weed oilseed rape (Brassica napus)

E. Soltani, J. M. Baskin, C. C. Baskin

Research output: Contribution to journalReview articlepeer-review

13 Scopus citations

Abstract

Fresh seeds of oilseed rape (Brassica napus) are reported to be nondormant and nonphotoblastic. However, a portion of the seeds can be induced into a light-requiring state (secondary dormancy) for germination and also exhibit dormancy cycling. Thus, if seeds become buried in the soil they can form a persistent seedbank and become a serious volunteer weed in succeeding crops. The capacity of nondormant seeds of B. napus to be induced into secondary dormancy is contrary to results of studies on fresh nondormant seeds of some other species. A reanalysis of published and unpublished data shows that fresh seeds of this species have some degree of primary dormancy and that there is a significant relationship between primary dormancy and the capacity to enter secondary dormancy. However, most germination tests on B. napus have not been done in enough detail to detect primary dormancy (or not) in fresh seeds of this species. The usefulness of information on the relationship between primary dormancy and the capacity of the seeds to enter secondary dormancy is discussed in relation to management of weedy volunteers of this species.

Original languageEnglish
Pages (from-to)5-14
Number of pages10
JournalWeed Research
Volume59
Issue number1
DOIs
StatePublished - Feb 1 2019

Bibliographical note

Publisher Copyright:
© 2018 European Weed Research Society

Keywords

  • conditional dormancy
  • light sensitivity
  • oilseed rape
  • physiological dormancy
  • soil seedbank

ASJC Scopus subject areas

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

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