In any case, the Arabidopsis mutant noa1 is not only impaired in NO production but is also more susceptible to infection by diverse pathogens, including Pseudomonas syringae, Colletotrichum orbiculare and Sclerotinia sclerotiorum (Zeidler et al., 2004; Asai et al., 2008; Perchepied et al., 2010). The gene discussed is NOA1; the disease is infection.