Required for plastoglobule development and resistance to multiple stresses. Regulates plastoglobule osmiophilic content. May be involved in the transport of lipophilic antioxidants in and out of the plastoglobule. Part of the Photosystem II light-harvesting complex (LHCII). Phosphorylated as part of a basal defense response. Increased susceptibility to ozone and to bacterial disease. Belongs to the PAP/fibrillin family.