Unmasking Mildew Resistance Locus O

Although Loss of Mildew Resistance Locus O (MLO) has become nearly synonymous with powdery mildew susceptibility, recent research reveals a much broader role in plant sensing and development. MLO is required for normal colonization by arbuscular mycorrhizal fungi and the endophyte Serendipita indica. Several MLO family members are required for other essential plant processes, including pollen tube reception and thigmotropism. While these...