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Legacy of historic ozone exposure on plant community and food web structure

preparation of the manuscript. Author Contributions Conceptualization: M. Alejandra MartÂõnez-Ghersa, Pedro E. Gundel, Claudio M. Ghersa. Data curation: Ana M. Folcia, Jennifer B. Landesmann, Laura Ventura ... . Formal analysis: AnalÂõa I. MeneÂndez, Pedro E. Gundel, Ana M. Folcia, Laura Ventura. Funding acquisition: M. Alejandra MartÂõnez-Ghersa. Investigation: M. Alejandra MartÂõnez-Ghersa, AnalÂõa I

Geographic Variation in Festuca rubra L. Ploidy Levels and Systemic Fungal Endophyte Frequencies

Polyploidy and symbiotic Epichloë fungal endophytes are common and heritable characteristics that can facilitate environmental range expansion in grasses. Here we examined geographic patterns of polyploidy and the frequency of fungal endophyte colonized plants in 29 Festuca rubra L. populations from eight geographic sites across latitudes from Spain to northernmost Finland and ...

Epichloë Endophytes Alter Inducible Indirect Defences in Host Grasses

Epichloë endophytes are common symbionts living asymptomatically in pooid grasses and may provide chemical defences against herbivorous insects. While the mechanisms underlying these fungal defences have been well studied, it remains unknown whether endophyte presence affects the host's own defences. We addressed this issue by examining variation in the impact of Epichloë on ...

Ozone Exposure of a Weed Community Produces Adaptive Changes in Seed Populations of Spergula arvensis

Tropospheric ozone is one of the major drivers of global change. This stress factor alters plant growth and development. Ozone could act as a selection pressure on species communities composition, but also on population genetic background, thus affecting life history traits. Our objective was to evaluate the consequences of prolonged ozone exposure of a weed community on phenotypic ...

Neotyphodium endophyte infection frequency in annual grass populations: relative importance of mutualism and transmission efficiency

Persistence and ubiquity of vertically transmitted Neotyphodium endophytes in grass populations is puzzling because infected plants do not consistently exhibit increased fitness. Using an annual grass population model, we show that the problems for matching endophyte infection and mutualism are likely to arise from difficulties in detecting small mutualistic effects, variability in ...