Figure 1.

Schematic diagram depicting the generation of the plant material used for the experiments. (A) Endophyte was removed from the Lolium multiflorum Pampean population naturally infected with Neotyphodium occultans endophyte to obtain female parent plants from the same population with contrasting infection level (Ps+ and Ps−). Plants from these populations were crossed with male parent plants from four different populations and the resulting ones were Ps+(Ps), Ps−(Ps), Ps+(Mr), Ps−(Mr), Ps+(Gs), Ps−(Gs), Ps+(Gr), and Ps−(Gr). (B) Response variables used to estimate the performance of both host plant population and endophyte symbiont subjected to different stresses during the grass life cycle.