Figure 1. Experimental design used to analyse the combined effects of plant density and costs of infection on competitive ability of Arabidopsis.

Costs of infection were analysed at 1, 2 and 4 plants per pot using monocultures of infected (I, I/I and I/I/I/I) and mock-inoculated plants (M, M/M and M/M/M/M), as well as in mixed cultures of infected and mock-inoculated plants simulating different CMV prevalence (M/I, M/M/M/I, M/M/I/I and M/I/I/I with infected and mock-inoculated plants next to each other; M/I/M/I with infected and mock-inoculated plants opposite to each other). Fifteen replicated pots per treatment were grown and differences between treatments were analysed by ANOVA.