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

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Lundell , R , Hänninen , H , Saarinen , T , Åström , H & Zhang , R 2020 , ' Beyond rest and quiescence (endodormancy and ecodormancy) : A novel model for quantifying plant-environment interaction in bud dormancy release ' , Plant, Cell and Environment , vol. 43 , no. 1 , pp. 40-54 . https://doi.org/10.1111/pce.13650

Title: Beyond rest and quiescence (endodormancy and ecodormancy) : A novel model for quantifying plant-environment interaction in bud dormancy release
Author: Lundell, Robin; Hänninen, Heikki; Saarinen, Timo; Åström, Helena; Zhang, Rui
Contributor: University of Helsinki, Organismal and Evolutionary Biology Research Programme
University of Helsinki, Organismal and Evolutionary Biology Research Programme
University of Helsinki, Organismal and Evolutionary Biology Research Programme
Date: 2020-01
Language: eng
Number of pages: 15
Belongs to series: Plant, Cell and Environment
ISSN: 1365-3040
URI: http://hdl.handle.net/10138/323947
Abstract: 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.
Subject: 11831 Plant biology
BOREAL
BUDBURST
CHILLING REQUIREMENT
PHENOLOGY
SEASONALITY
TEMPERATURE
TREES
chilling
dormancy
ecodormancy
endodormancy
forcing
growth onset
phenology models
post-rest
quiescence
rest
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