title: Molecular analysis of genes in Nostoc punctiforme involved in pilus biogenesis and plant infection.
abstract: Hormogonia are the infective agents in many cyanobacterium-plant symbioses. Pilus-like appendages are expressed on the hormogonium surface, and mutations in pil-like genes altered surface piliation and reduced symbiotic competency. This is the first molecular evidence that pilus biogenesis in a filamentous cyanobacterium requires a type IV pilus system.
authors.affiliation: Institute of Integrative and Comparative Biology, Garstang Building, Faculty of Biological Sciences, University of Leeds, Leeds, LS2 9JT, United Kingdom.
authors.forename: Paula S
authors.initials: PS
authors.lastname: Duggan
authors.forename: Priscila
authors.initials: P
authors.lastname: Gottardello
authors.forename: David G
authors.initials: DG
authors.lastname: Adams
mesh_terms: D000595:Amino Acid Sequence; D017124:Conserved Sequence; D010861:Fimbriae, Bacterial / Q000235:genetics* / Q000502:physiology / Q000648:ultrastructure; D005798:Genes, Bacterial; D046529:Microscopy, Electron, Transmission; D008969:Molecular Sequence Data; D009154:Mutation; D046937:Nostoc / Q000235:genetics* / Q000254:growth & development* / Q000502:physiology; D018521:Plant Physiological Phenomena; D010944:Plants / Q000382:microbiology*; D016415:Sequence Alignment; D013559:Symbiosis / Q000235:genetics*