Use of Natural Variation in<i>Arabidopsis thaliana</i>to Study Adaptation

Smith, Lisa M.; Laitinen, Roosa A. E.

doi:10.1002/9781118860526.ch2

Cited by 2 publications

(2 citation statements)

References 151 publications

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“…Natural populations of the genetic model plant A. thaliana are widely distributed, showing a strong population structure. This natural genetic variation provides an excellent tool for studying mechanisms involved in local adaptation (Smith & Laitinen, ). Common garden experiments performed in largely distant locations (e.g., Ågren & Schemske, ; Fournier‐Level et al, ) revealed that not only climate but also geography determines plant fitness as a proxy for local adaptation in A. thaliana .…”

Section: Introductionmentioning

confidence: 99%

Soil carbonate drives local adaptation in Arabidopsis thaliana

Terés

Busoms

Martín

et al. 2019

Plant Cell & Environment

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High soil carbonate limits crop performance especially in semiarid or arid climates. To understand how plants adapt to such soils, we explored natural variation in tolerance to soil carbonate in small local populations (demes) of Arabidopsis thaliana growing on soils differing in carbonate content. Reciprocal field-based transplants on soils with elevated carbonate (+C) and without carbonate (−C) over several years revealed that demes native to (+C) soils showed higher fitness than those native to (−C) soils when both were grown together on carbonate-rich soil. This supports the role of soil carbonate as a driving factor for local adaptation. Analyses of contrasting demes revealed key mechanisms associated with these fitness differences. Under controlled conditions, plants from the tolerant deme A1 (+C) native to (+C) soil were more resistant to both elevated carbonate and iron deficiency than plants from the sensitive T6 (−C) deme native to (−C) soil. Resistance of A1 (+C) to elevated carbonate was associated with higher root extrusion of both protons and coumarin-type phenolics. Tolerant A1 (+C) also had better Ca-exclusion than sensitive T6 (−C) . We conclude that Arabidopsis demes are locally adapted in their native habitat to soils with moderately elevated carbonate. This adaptation is associated with both enhanced iron acquisition and calcium exclusion.

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Section: Introductionmentioning

confidence: 99%

Soil carbonate drives local adaptation in Arabidopsis thaliana

Terés

Busoms

Martín

et al. 2019

Plant Cell & Environment

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“…Although outcrossing is beneficial in nature, the high degree of homozygosity in selfing A. thaliana makes it an easily tractable genetic system. Indeed, studies of natural variation in A. thaliana in controlled experiments have been successfully used to reveal the genetic basis of many adaptive processes (Weigel, ; Smith and Laitinen, ). In nature, the different Arabidopsis species often grow in mono‐populations, but sometimes they are mixed.…”

Section: Arabidopsis As a Model Genus To Understand Hybrid Incompatibmentioning

confidence: 99%

Diverse paths to hybrid incompatibility in Arabidopsis

Vaid

Laitinen

2018

The Plant Journal

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Summary One of the most essential questions of biology is to understand how different species have evolved. Hybrid incompatibility, a phenomenon in which hybrids show reduced fitness in comparison with their parents, can result in reproductive isolation and speciation. Therefore, studying hybrid incompatibility provides an entry point in understanding speciation. Hybrid incompatibilities are known throughout taxa, and the underlying mechanisms have mystified scientists since the theory of evolution by means of natural selection was introduced. In plants, it is only in recent years that the high‐throughput genetic and molecular tools have become available for the Arabidopsis genus, thus helping to shed light on the different genes and molecular and evolutionary mechanisms that underlie hybrid incompatibilities. In this review, we highlight the current knowledge of diverse mechanisms that are known to contribute to hybrid incompatibility.

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Use of Natural Variation inArabidopsis thalianato Study Adaptation

Cited by 2 publications

References 151 publications

Soil carbonate drives local adaptation in Arabidopsis thaliana

Soil carbonate drives local adaptation in Arabidopsis thaliana

Diverse paths to hybrid incompatibility in Arabidopsis

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