title: Surface motility of Xylella fastidiosa visualized by oblique illumination.
abstract: Stereomicroscopic observations using oblique illuminations revealed the presence of two types of movement trails by Xylella fastidiosa strains (A- and G-genotypes) isolated from almond-leaf scorch samples on the surface of PW and PD3 culture media. The A-genotype strains showed curved motility trails, and the G-genotype strains showed straight motility trails. Haloes were found around some G-genotype colonies due to the excretion of unknown factors and (or) compounds, which might be related to bacterial surface motility.
authors.affiliation: United States Department of Agriculture, Agricultural Research Service, San Joaquin Valley Agricultural Sciences Center, 9611 South Riverbend Avenue, Parlier, CA 93648, USA. jichen@fresno.ars.usda.gov
authors.forename: J
authors.initials: J
authors.lastname: Chen
authors.forename: R
authors.initials: R
authors.lastname: Groves
authors.forename: E
authors.initials: E
authors.lastname: Civerolo
authors.forename: S
authors.initials: S
authors.lastname: Livingston
mesh_terms: D001431:Bacteriological Techniques; D002465:Cell Movement; D003470:Culture Media; D005336:Fiber Optic Technology; D005838:Genotype; D008029:Lighting; D008853:Microscopy / Q000295:instrumentation / Q000379:methods; D010935:Plant Diseases / Q000382:microbiology*; D018515:Plant Leaves / Q000382:microbiology*; D027861:Prunus / Q000382:microbiology*; D044167:Xylella / Q000145:classification / Q000235:genetics / Q000302:isolation & purification / Q000502:physiology*
chemical_list: D003470:Culture Media