Full TGIF Record # 299620
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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:
i
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
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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
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.
Fastlink to access this record outside TGIF: https://tic.msu.edu/tgif/flink?recno=299620
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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
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