Linking genes with ecological strategies in <i>Arabidopsis thaliana</i>

Takou, Margarita; Wieters, Benedict; Coupland, George; Linstädter, Anja; Meaux, Juliette de

doi:10.1093/jxb/ery447

Cited by 43 publications

(49 citation statements)

References 145 publications

(207 reference statements)

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“…Our results are consistent with previous observations of covariation in seed dormancy (measured as after-ripening requirements) and flowering-time traits across climatic gradients in A. thaliana (12,19,20,37). Trait syndromes allow local adaptation, as covariation in life-history traits, growth rate, and stress responses influence fitness (37). However, our observations of germination responses to chilling add a new dimension to this picture of multivariate life histories, showing that coldinduced secondary dormancy is correlated with flowering and senescence to construct a wide range of seasonal life-history strategies.…”

Section: Significancesupporting

confidence: 92%

“…The timing of germination defines the temporal environment an annual plant experiences, and interacts with later life-cycle traits to generate different life histories. Our results are consistent with previous observations of covariation in seed dormancy (measured as after-ripening requirements) and flowering-time traits across climatic gradients in A. thaliana (12,19,20,37). Trait syndromes allow local adaptation, as covariation in life-history traits, growth rate, and stress responses influence fitness (37).…”

Section: Significancesupporting

confidence: 91%

“…However, strong vernalization requirements and late flowering may be maladaptive for summer annuals, especially if the growing season is short. Consequently, natural selection on germination and later life-history traits may be correlated, and adaptation to climate across a species' range may therefore involve coordinated evolution of suites of life-history traits (11,12,19,20,36,37).…”

Section: Significancementioning

confidence: 99%

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Functional variants of DOG1 control seed chilling responses and variation in seasonal life-history strategies in Arabidopsis thaliana

Martínez‐Berdeja

Stitzer

Taylor

et al. 2020

Proc. Natl. Acad. Sci. U.S.A.

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The seasonal timing of seed germination determines a plant’s realized environmental niche, and is important for adaptation to climate. The timing of seasonal germination depends on patterns of seed dormancy release or induction by cold and interacts with flowering-time variation to construct different seasonal life histories. To characterize the genetic basis and climatic associations of natural variation in seed chilling responses and associated life-history syndromes, we selected 559 fully sequenced accessions of the model annual species Arabidopsis thaliana from across a wide climate range and scored each for seed germination across a range of 13 cold stratification treatments, as well as the timing of flowering and senescence. Germination strategies varied continuously along 2 major axes: 1) Overall germination fraction and 2) induction vs. release of dormancy by cold. Natural variation in seed responses to chilling was correlated with flowering time and senescence to create a range of seasonal life-history syndromes. Genome-wide association identified several loci associated with natural variation in seed chilling responses, including a known functional polymorphism in the self-binding domain of the candidate gene DOG1. A phylogeny of DOG1 haplotypes revealed ancient divergence of these functional variants associated with periods of Pleistocene climate change, and Gradient Forest analysis showed that allele turnover of candidate SNPs was significantly associated with climate gradients. These results provide evidence that A. thaliana’s germination niche and correlated life-history syndromes are shaped by past climate cycles, as well as local adaptation to contemporary climate.

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Section: Significancesupporting

confidence: 92%

Section: Significancesupporting

confidence: 91%

Section: Significancementioning

confidence: 99%

See 1 more Smart Citation

Functional variants of DOG1 control seed chilling responses and variation in seasonal life-history strategies in Arabidopsis thaliana

Martínez‐Berdeja

Stitzer

Taylor

et al. 2020

Proc. Natl. Acad. Sci. U.S.A.

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“…Made of artificial crosses, they preclude examining the relationships between LES and the natural environment. Interestingly, A. thaliana has recently gained a renewed interest in functional ecology and biogeography 50–52 , notably due to the large panel of natural accessions that have been collected from contrasting climates, and genotyped at high density ( e.g . 42–45 ).…”

Section: Introductionmentioning

confidence: 99%

Leaf economics and slow-fast adaptation across the geographic range of Arabidopsis thaliana

Sartori

Vasseur

Violle

et al. 2019

Sci Rep

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Life history strategies of most organisms are constrained by resource allocation patterns that follow a ‘slow-fast continuum’. It opposes slow growing and long-lived organisms with late investment in reproduction to those that grow faster, have earlier and larger reproductive effort and a short longevity. In plants, the Leaf Economics Spectrum (LES) depicts a leaf-level trade-off between the rate of carbon assimilation and leaf lifespan, as stressed in functional ecology from interspecific comparative studies. However, it is still unclear how the LES is connected to the slow-fast syndrome. Interspecific comparisons also impede a deep exploration of the linkage between LES variation and adaptation to climate. Here, we measured growth, morpho-physiological and life-history traits, at both the leaf and whole-plant levels, in 378 natural accessions of Arabidopsis thaliana . We found that the LES is tightly linked to variation in whole-plant functioning, and aligns with the slow-fast continuum. A genetic analysis further suggested that phenotypic differentiation results from the selection of different slow-fast strategies in contrasted climates. Slow growing and long-lived plants were preferentially found in cold and arid habitats while fast growing and short-lived ones in more favorable habitats. Our findings shed light on the role of the slow-fast continuum for plant adaptation to climate. More broadly, they encourage future studies to bridge functional ecology, genetics and evolutionary biology to improve our understanding of plant adaptation to environmental changes.

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“…For example, genome-wide single-nucleotide polymorphisms (SNPs) have been investigated for associations with the environmental conditions of the source sites (Hancock et al 2011) and with fitness measures in a common garden experiment (Fournier-Level et al 2011). The patterns of local adaptation in A. thaliana allowed one to interpret co-variation of multiple traits as a set of life history strategies (Takou et al 2019), such as competitor, stress-tolerator and ruderal (CSR) strategies (Grime et al 1988). Another advanced tool that has recently been used in ecological studies is whole-genome measures of gene expression (transcriptome) analysis with microarray and RNA-Seq (Richards et al 2012; Alvarez et al 2015).…”

Section: Introductionmentioning

confidence: 99%

Arabidopsis halleri: a perennial model system for studying population differentiation and local adaptation

Honjo

Kudoh

2019

AoB PLANTS

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Local adaptation is assumed to occur when populations differ in a phenotypic trait or a set of traits, and such variation has a genetic basis. Here, we introduce Arabidopsis halleri and its life history as a perennial model system to study population differentiation and local adaptation. Studies on altitudinal adaptation have been conducted in two regions: Mt. Ibuki in Japan and the European Alps. Several studies have demonstrated altitudinal adaptation in ultraviolet-B (UV-B) tolerance, leaf water repellency against spring frost and anti-herbivore defences. Studies on population differentiation in A. halleri have also focused on metal hyperaccumulation and tolerance to heavy metal contamination. In these study systems, genome scans to identify candidate genes under selection have been applied. Lastly, we briefly discuss how RNA-Seq can broaden phenotypic space and serve as a link to underlying mechanisms. In conclusion, A. halleri provides us with opportunities to study population differentiation and local adaptation, and relate these to the genetic systems underlying target functional traits.

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Linking genes with ecological strategies in Arabidopsis thaliana

Abstract: This review collects together evidence that phenotypic traits often evolve as syndromes in Arabidopsis thaliana populations, pointing to extensive levels of ecological diversification within species.

Cited by 43 publications

References 145 publications

Functional variants of DOG1 control seed chilling responses and variation in seasonal life-history strategies in Arabidopsis thaliana

Functional variants of DOG1 control seed chilling responses and variation in seasonal life-history strategies in Arabidopsis thaliana

Leaf economics and slow-fast adaptation across the geographic range of Arabidopsis thaliana

Arabidopsis halleri: a perennial model system for studying population differentiation and local adaptation

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