To test whether MeNHP is able to prime the defense response in Arabidopsis and further to rescue the fmo1-1 infection phenotype, we challenged MeNHP-treated fmo1-1 and Col-0 plants with a spore solution of H. arabidopsidis Noco 2 and analyzed spore growth on mock- or MeNHP-treated plants (Fig. 6A, B). The gene discussed is FMO1; the disease is infection.