The article discusses the research about the physiology of Bacillus subtilis (BsIA) biofilms. It references the study "BsIA is a self-assembling bacterial hydrophobin that coats the Bacillus subtilis biolfim," by L. Hobley and colleagues in the 2013 issue. It states that BsIA biofilms acts as water-repellent and defend bacterial colonies formed on plant roots from environmental threats.