<p> 1 Supplementary Material </p><p>2</p><p>3 Article title: Symbiotic interactions as drivers of trade-offs in plants: effects of fungal</p><p>4 endophytes on tall fescue </p><p>5 Journal: Fungal Diversity</p><p>6 Authors: Pedro E. Gundel1,2,*, Lucas A. Garibaldi3, Marjo Helander4, Kari Saikkonen1</p><p>7 Affiliations: </p><p>8 1 MTT Agrifood Research Finland, Department of Plant Production, Jokioinen, Finland. </p><p>9 2 IFEVA - CONICET – Faculty of Agronomy, Buenos Aires University (UBA), Argentina. </p><p>10 3 Sede Andina, Universidad Nacional de Río Negro (UNRN) and Consejo Nacional de 11 Investigaciones Científicas y Técnicas (CONICET), Mitre 630, CP 8400, San Carlos de 12 Bariloche, Río Negro, Argentina.</p><p>13 4 Section of Ecology, Department of Biology, University of Turku, Turku, Finland.</p><p>14</p><p>15 * Corresponding author: MTT, Agrifood Research Finland, Department of Plant Production,</p><p>16 31600 Jokioinen, Finland. Tel: +358 341 881; fax +348 20 772 040; E-mail:</p><p>17 [email protected]</p><p>18</p><p>1 19</p><p>20 Table 1. Effect values for minimum adequate models of the influence of endophyte</p><p>21 colonization on biomass allocation patterns in Schedonorus phoenix plants from different</p><p>22 origins and environmental treatments of water and nutrient addition (see Fig. 4, and</p><p>23 Statistical analyses). The coefficients for level of factors are estimated relative to a given</p><p>24 level as for example, Water-yes (water added) is estimated relative to Water-no (not in the</p><p>25 table). Meaning of terms: Water-yes = water added; Nutrient-yes = nutrient added;</p><p>26 Oringin_G = Gotland population; Oringin_K = cultivar KY-31; Oringin_S = Sweden</p><p>27 population; Endophyte_E+ = endophyte colonized plants; Endophyte_ME- =</p><p>28 manipulatively uncolonized plants; rep_biomass: reproductive biomass; and rep_effort =</p><p>29 reproductive effort. </p><p>Reproductive Panicles (log10 no. Relative panicle biomass (log10 g) plant-1) number (log10) Fixed effects (mean) Intercept -1.9 1.0 -0.14 Water_yes 0.036 -0.027 0.072 Nutrient_yes -0.49 0.058 0.29 Origin_G -0.11 -0.18 0.098 Origin_K -0.21 0.053 0.32 Origin_S 0.028 -0.11 0.17 Endophyte_E+ 0.081 -0.15 Endophyte_ME- -0.095 -0.011 Origin_G x nutrient_yes -0.33 Origin_K x nutrient_yes -0.39 Origin_S x nutrient_yes -0.089 vegetative biomass 1.31 reproductive biomass 0.67 rep_biomass x origin_G 0.058 rep_biomass x origin_K -0.038 rep_biomass x origin_S 0.094 rep_biomass x endophyte_E+ -0.028 rep_biomass x endophyte_ME- 0.066 reproductive effort -0.60 rep_effort x water_yes 0.092 rep_effort x origin_G 0.18 rep_effort x origin_K 0.28 rep_effort x origin_S 0.12 rep_effort x nutrient_yes 0.25 rep_effort x endophyte_E+ -0.14 rep_effort x endophyte_ME- -0.018 rep_effort x origin_G x nutrient_yes -0.25 rep_effort x origin_K x nutrient_yes -0.37 rep_effort x origin_S x nutrient_yes -0.059</p><p>Random effects (standard deviation) Blocks 0.12 0.045 0.040 Plots within blocks 0.13 0.015 0.014 Plants within plots within blocks 0.44 0.18 0.16 (residual) 30 31</p><p>32</p><p>3</p>