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DOI: | 10.1111/nph.15215 |
Web URL(s): | https://nph.onlinelibrary.wiley.com/doi/10.1111/nph.15215 Last checked: 07/20/2018 https://nph.onlinelibrary.wiley.com/doi/epdf/10.1111/nph.15215 Last checked: 07/20/2018 Requires: PDF Reader |
Publication Type:
| Refereed |
Author(s): | Cavazos, Brittany R.;
Bohner, Teresa F.;
Donald, Marion L.;
Sneck, Michelle E.;
Shadow, Alan;
Omacini, Marina;
Rudgers, Jennifer A.;
Miller, Tom E. X. |
Author Affiliation: | Cavazos, Bohner, Donald, Sneck, and Miller: Department of BioSciences, Program in Ecology and Evolutionary Biology, Rice University, Houston, TX; Shadow: USDA NRCS East Texas Plant Materials Center, Nacogdoches, TX; Omacini: IFEVA - Facultad de Agronomia, Universidad de Buenos Aires, CONICET, Buenos Aires, Argentina; Rudgers: Department of Biology, University of New Mexico, Albuquerque, NM |
Title: | Testing the roles of vertical transmission and drought stress in the prevalence of heritable fungal endophytes in annual grass populations |
Section: | Research Other records with the "Research" Section
Full papers Other records with the "Full papers" Section
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Source: | New Phytologist. Vol. 219, No. 3, August 2018, p. 1075-1084. |
Publishing Information: | Oxford, England, United Kingdom: Blackwell Publishing, for the New Phytologist Trust |
# of Pages: | 10 |
Related Web URL: | https://nph.onlinelibrary.wiley.com/doi/abs/10.1111/nph.15215 Last checked: 07/20/2018 Notes: Abstract only https://doi.org/10.1111/nph.15215 Last checked: 07/20/2018 Notes: Abstract only |
Keywords: | TIC Keywords: Drought stress; Endophytes; Epichloe occultans; Heritability; Lolium multiflorum; Transmission; Diseases
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Abstract/Contents: | "Beneficial inherited symbionts are expected to reach high prevalence in host populations, yet many are observed at intermediate prevalence. Theory predicts that a balance of fitness benefits and efficiency of vertical transmission may interact to stabilize intermediate prevalence. We established populations of grass hosts (Lolium multiflorum) that varied in prevalence of a heritable fungal endophyte (Epichloë occultans), allowing us to infer long-term equilibria by tracking change in prevalence over one generation. We manipulated an environmental stressor (elevated precipitation), which we hypothesized would reduce the fitness benefits of symbiosis, and altered the efficiency of vertical transmission by replacing endophyte-positive seeds with endophyte-free seeds. Endophytes and elevated precipitation both increased host fitness, but symbiont effects were not stronger in the drier treatment, suggesting that benefits of symbiosis were unrelated to drought tolerance. Reduced transmission suppressed the inferred equilibrium prevalence from 42.6% to 11.7%. However, elevated precipitation did not modify prevalence, consistent with the result that it did not modify fitness benefits. Our results demonstrate that failed transmission can influence the prevalence of heritable microbes and that intermediate prevalence can be a stable equilibrium due to forces that allow symbionts to increase (fitness benefits) but prevent them from reaching fixation (failed transmission)." |
Language: | English |
References: | 69 |
Note: | Figures Tables Graphs |
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete): Cavazos, B. R., T. F. Bohner, M. L. Donald, M. E. Sneck, A. Shadow, M. Omacini, et al. 2018. Testing the roles of vertical transmission and drought stress in the prevalence of heritable fungal endophytes in annual grass populations. New Phytol. 219(3):p. 1075-1084. |
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| DOI: 10.1111/nph.15215 |
| Web URL(s): https://nph.onlinelibrary.wiley.com/doi/10.1111/nph.15215 Last checked: 07/20/2018 https://nph.onlinelibrary.wiley.com/doi/epdf/10.1111/nph.15215 Last checked: 07/20/2018 Requires: PDF Reader |
| MSU catalog number: b2219226 |
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