Beyond rest and quiescence (endodormancy and ecodormancy): A novel model for quantifying plant-environment interaction in bud dormancy release

Robin Lundell, Heikki Hänninen, Timo Saarinen, Helena Åström, Rui Zhang

Research output: Contribution to journalArticleScientificpeer-review


Bud dormancy of plants has traditionally been explained either by physiological growth arresting conditions in the bud or by unfavourable environmental conditions, such as non-growth-promoting low air temperatures. This conceptual dichotomy has provided the framework also for developing process-based plant phenology models. Here, we propose a novel model that in addition to covering the classical dichotomy as a special case also allows the quantification of an interaction of physiological and environmental factors. According to this plant-environment interaction suggested conceptually decades ago, rather than being unambiguous, the concept of "non-growth-promoting low air temperature" depends on the dormancy status of the plant. We parameterized the model with experimental results of growth onset for seven boreal plant species and found that based on the strength of the interaction, the species can be classified into three dormancy types, only one of which represents the traditional dichotomy. We also tested the model with four species in an independent experiment. Our study suggests that interaction of environmental and physiological factors may be involved in many such phenomena that have until now been considered simply as plant traits without any considerations of effects of the environmental factors.

Original languageEnglish
JournalPlant, Cell and Environment
Issue number1
Pages (from-to)40-54
Number of pages15
Publication statusPublished - Jan 2020
MoE publication typeA1 Journal article-refereed

Fields of Science

  • 11831 Plant biology
  • chilling
  • dormancy
  • ecodormancy
  • endodormancy
  • forcing
  • growth onset
  • phenology models
  • post-rest
  • quiescence
  • rest

Cite this