People
Niek Scheepens (PI), Oliver Bossdorf
Funding
Alexander von Humboldt Foundation
Duration
September 2014 - August 2016 (publications
pending)
In short
Changes in climate variability are one of the
least understood aspects of global climate change. In this project, we test
whether the ability of plants to deal with increased climate variability is a
variable and evolvable trait, so that we can expect plants to adapt to such
changes in the future
Project description
The effects of global climate change on plant
growth is a hot topic, but research mainly focuses on changes in temperature
and precipitation means. In 2014, the Alexander von Humboldt Foundation awarded
a research fellowship to Niek Scheepens to investigate variability and
evolvability of phenotypic plasticity to climate variability.
In a series of experiments using Arabidopsis
thaliana as an experimental system we first evaluate the relationships between
the precipitation variability at plant origins and phenotypic plasticity in
response to watering variability in a common garden experiment with 200 natural
ecotypes from Eurasia and two watering treatments differing only in
variability. Secondly, we test the adaptive significance of phenotypic
plasticity under variable climatic conditions through a multi-generation
selection experiment on standing variation in communities of selected ecotypes
that showed a broad range in plasticity in the first experiment. We use growth
cabinets differing in temperature variability, and similar watering regimes as
in the first experiment will be used. Communities are composed to reflect
diversity with decreasing spatial scales in order to investigate the response
to selection under increasingly realistic conditions but with decreasing
genetic diversity. Finally, we improve our understanding of the mechanism
through which phenotypic plasticity confers fitness advantages by performing a
common garden experiment with multiple crossed environmental treatments, i.e.
frequency, timing and intensity of drought stress, applied to 30 selected
ecotypes with a broad range in phenotypic plasticity.
Publications
Scheepens JF, Deng Y, Bossdorf O (2018) Phenotypic plasticity in response to temperature fluctuations is genetically variable, and relates to climatic variability of origin, in Arabidopsis thaliana. AoB Plants, 10: ply043. Link
Scheepens JF, Rauschkolb R, Ziegler R, Schroth V, Bossdorf O (2018) Genotypic diversity and environmental variability affect the invasibility of experimental plant populations. Link