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Articles by Jon Ågren
Thiamine cross-feeding drives microbial coexistence in the leaf microbiome
Abstract Microbiome homeostasis is crucial for host health and ecosystem function, yet the molecular and ecological mechanisms underlying community assembly and stability remain elusive. Here we uncover a conserved yeast–oomycete association that promotes their coexistence in the leaf microbiome.
Testing a General Theory for Optimal Flowering Time in Deciduous Perennial Plants as a Function of Growing Season Length
1 Introduction When to reproduce is a critical fitness-determining decision for seasonal organisms, confined to a limited window of opportunity with conditions favourable for growth: the meteorological growing season (Körner et al. 2023). Climate change is both advancing the onset and prolonging the duration of this window in many systems (Linderholm 2006; Menzel and Fabian 1999).
The role of secondary pollinators in the evolution of complex colour signals in a bimodal pollination system
Abstract Flower colour is recognized as a key trait influencing pollinator visitation and behaviour, evolved to match the sensory system of a particular pollinator group. However, some flowers combine colours associated with different pollinators, suggesting bimodal adaptation. The perennial herb Cyrtanthus obliquus produces red corollas with yellow tips and is pollinated by birds, but also by bees.
Testing a general theory for flowering time shift as a function of growing season length
Abstract Understanding the effects of climate change on the evolution of phenological timing, such as start of flowering, is of major interest because phenology is critical for fitness of populations, and underpins many ecological dynamics. Much recent research has focused on the correlation between phenological timing and the arrival of spring.
Adaptation to soil type contributes little to local adaptation in an Italian and a Swedish population of Arabidopsis thaliana growing on contrasting soils
Abstract Natural populations are subject to selection caused by a range of biotic and abiotic factors in their native habitats. Identifying these agents of selection and quantifying their effects is key to understanding how populations adapt to local conditions. We performed a fully factorial reciprocal transplant experiment using locally adapted accessions of Arabidopsis thaliana at their native sites to distinguish the contributions of adaptation to soil type and climate.
A large effect genetic trade-off is caused by a single mutation in CBF2
Abstract Identifying the genetic basis of local adaptation and fitness trade-offs across environments is a central goal of evolutionary biology. Cold acclimation is an adaptive plastic response for surviving seasonal freezing, and the costs of acclimation may be a general mechanism for fitness trade-offs across environments in temperate zone species.
Reply to: Re-evaluating evidence for adaptive mutation rate variation - Nature
replying to L. Wang et al. Nature https://doi.org/10.1038/s41586-023-06314-y (2023) Wang and colleagues1 argue that our report2 of lower mutation rates in gene bodies, essential genes and regions marked by H3K4me1 must result from DNA sequencing errors. We appreciate the issues raised by them and by other colleagues3.
Author Correction: Mutation bias reflects natural selection in Arabidopsis thaliana - Nature
Correction to: Nature https://doi.org/10.1038/s41586-021-04269-6 Published online 12 January 2022 The second sentence in the Methods section “Identification of de novo somatic mutations in a resequencing dataset of A.
Ecological genetics of local adaptation in Arabidopsis: An 8‐year field experiment
1 INTRODUCTION Fitness trade-offs across environments are a compelling explanation for biological diversification at multiple scales (Agrawal, 2020; Futuyma & Moreno, 1988; MacArthur, 1972; Whitlock, 1996). Such trade-offs should arise when phenotypes conferring adaptation to the local environment are poorly matched to alternate environments, resulting in a fitness cost.
Mutation bias reflects natural selection in Arabidopsis thaliana - Nature
Identification of de novo mutations in A. thaliana Col-0 mutation accumulation lines Our training set of mutations was identified from 107 mutation accumulation lines of the A. thaliana Col-0 accession, which is the basis of the A. thaliana TAIR10 reference genome sequence12.
Pollinators, herbivores, and the evolution of floral traits
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