Plant pathogens secrete effector proteins to overcome host immunity and promote colonization. In oomycete plant pathogens, the expression of many effector genes is altered upon infection; however, the regulatory mechanisms are unclear. In this study, we identified a su(var)3-9, enhancer of zeste, and trithorax (SET) domain protein-encoding gene, PsKMT3, that was highly induced at early infection stages in Phytophthora sojae.
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