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10 results for “Serpentine Soil”
Fig. 5. — Modified from VAN KORES 1995 in Are plant adaptations to growing on serpentine soil rare or common? A few case studies from New Caledonia
Fig. 5. — Modified from VAN KORES 1995, showing soil preferences as in Fig. 1. A, Acianthus sect. Macropetalus; B, Acianthus sect. Univiscidiatus.
Fig. 2 in Are plant adaptations to growing on serpentine soil rare or common? A few case studies from New Caledonia
Fig. 2. — Cladogram of Morinda (modified from JOHANSSON 1994), showing soil preferences as in Fig. 1. A, version with ability to grow on serpentine soil as plesiomorphic; B, version with ability to grow on serpentine soils apomorphic.
Data from: Major QTL controls adaptation to serpentine soils in Mimulus guttatus
Spatially varying selection is a critical driver of adaptive differentiation. Yet, there are few examples where the fitness effects of naturally segregating variants that contribute to local adaptation have been measured in the field. Plant adaptation to harsh soil habitats provides an ideal study system for investigating the genetic basis of local adaptation. The work presented here identifies a major locus underlying adaptation to serpentine soils in Mimulus guttatus and estimates the strength of selection on this locus in native field sites. Reciprocal transplant and common garden studies show that serpentine and non-serpentine populations of M. guttatus differ in their ability to survive on serpentine soils. We directly mapped these field survival differences by performing a bulk segregant analysis with F2 survivors from a field transplant study and identify a single QTL where individuals that are homozygous for the non-serpentine allele do not survive on serpentine soils. Genotyping the survivors from an independent mapping population reveals that this same QTL controls serpentine tolerance in a second, geographically distant population. Finally, we show that this QTL controls tolerance to soil properties, as opposed to some other aspect of the field sites that may differ, by performing a lab-based common-garden experiment in native serpentine soils that replicates the survival differences observed in the field. These results indicate that despite the myriad chemical and physical challenges that plants face in serpentine habitats, adaptation to these soils in M. guttatus has a simple genetic basis.
Fig. 4 in Are plant adaptations to growing on serpentine soil rare or common? A few case studies from New Caledonia
Fig. 4. — Guioa (WELZEN 1990), showing soil preferences as in Fig. 1.
Fig. 3 in Are plant adaptations to growing on serpentine soil rare or common? A few case studies from New Caledonia
Fig. 3. — Cupaniopsis (modified from ADEMA 1991), showing soil preferences as in Fig. 1.
Soil composition, phenotypic and genetic data to: Adaptive differentiation on serpentine soil in diploid versus autotetraploid populations of Biscutella laevigata (Brassicaceae)
<p><span>Serpentine soils exhibit extreme properties (e.g. high magnesium content) influencing plant growth and survival and have been repeatedly documented to promote adaptive edaphic differentiation in plants. Individuals from four pairs of nearby diploid and autotetraploid populations of <em>Biscutella laevigata</em> sampled on serpentine vs non-serpentine soils in a factorial design are used to assess the genetic and phenotypic changes associated with edaphic origin and ploidy level. Individual samples from natural populations were subjected to soil elemental analysis and genotyping using restriction site-associated DNA sequences (RAD-seq) to link genetic variation with contrasting soils and ploidy levels. In diploids, genetic variation was consistent with demographic contraction and a pattern of isolation by environment with respect to the ratio of calcium / magnesium concentrations, whereas tetraploids presented evidence of expansion with limited edaphic differentiation. The genetic basis of tolerance and adaptation to serpentine was further assessed experimentally on seed-grown individuals from all populations subjected to high (serpentine-like) vs low (control) concentrations of magnesium in hydropony. Fitness-related phenotypic traits under experimental cultivation were consistent with adaptive differentiation among diploid ecotypes but not among the tetraploids that similarly grow in both habitats and consistently present higher investment in roots. Further work comparing experimentally resynthesized polyploids to natural diploids and polyploids has to tease the role of whole genome duplication apart from the impact of post-polyploidy evolution.</span></p>
Data from: Major QTL controls adaptation to serpentine soils in Mimulus guttatus
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Soil composition, phenotypic and genetic data to: Adaptive differentiation on serpentine soil in diploid versus autotetraploid populations of Biscutella laevigata (Brassicaceae)
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Data from: Adaptation and divergence in edaphic specialists and generalists: serpentine soil endemics in the California flora occur in barer serpentine habitats with lower soil calcium levels than serpentine tolerators
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Interspecific trait differences drive plant community responses on serpentine soils.
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