ArticleOecologia2007
Soil calcium and plant disease in serpentine ecosystems: a test of the pathogen refuge hypothesis.
Article in Oecologia, 2007. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Who cites it
6 citing papers in PubMed, 23 citations in OpenAlex.
- A pathogen's spatial range is not constrained by geographical features in the flax rust pathosystem.Ecology and evolution · 2023Article
- Calcium nutrition nanoagent rescues tomatoes from mosaic virus disease by accelerating calcium transport and activating antiviral immunity.Frontiers in plant science · 2022Article
- Habitat type and interannual variation shape unique fungal pathogen communities on a California native bunchgrass.Fungal ecology · 2020Article
- Evidence of a salt refuge: chytrid infection loads are suppressed in hosts exposed to salt.Oecologia · 2015Article
- Occupation of bare habitats, an evolutionary precursor to soil specialization in plants.Proceedings of the National Academy of Sciences of the United States of America · 2014Article
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Authors and funding
3 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Ecologists have long sought mechanistic explanations for the patterns of plant distribution and endemism associated with serpentine soils. We conducted the first empirical test of the serpentine pathogen refuge hypothesis, which posits that the low levels of calcium found in serpentine soils provide associated plants with a refuge from attack by pathogens. We measured the range of soil calcium concentrations experienced by 16 wild population of California dwarf flax (Hesperolinon californicum) and experimentally recreated part of this range in the greenhouse by soaking serpentine soils in calcium chloride solutions of varying molarity. When flax plants grown in these soils were inoculated with spores of the rust fungus Melampsora lini we found a significant negative relationship between infection rates and soil calcium concentrations. This result refutes the pathogen refuge hypothesis and suggests that serpentine plants, by virtue of their association with low calcium soils, may be highly vulnerable to attack by pathogens. This interaction between plant nutrition and disease may in part explain demographic patterns associated with serpentine plant populations and suggests scenarios for the evolution of life history traits and the distribution of genetic resistance to infection in serpentine plant communities.
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Registered trials
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