title: Bacterial endobionts in the big non-mycorrhizal roots of Scots pine (Pinus sylvestris L.).
abstract: Subsurface bacterial growth occurred in an N-free medium inoculated with interior tissues of big non-mycorrhizal roots (7 to 8 mm diameter) of 15-20 years-old Scots pine (Pinus sylvestris L.) growing on sand dunes at the Baltic Sea of Poland. The bacteria were not N2 fixers as determined by the acetylene reduction method. Light microscopic and scanning electron microscopic observations revealed massive bacterial clusters residing in the cortical cells underlying epidermis and parenchyma. The bacteria produced yellow-green pigments on King's medium, which fluoresced under ultraviolet (UV) irradiation at 366 nm wavelength, and could be a siderophore-producing Pseudomonas.
authors.affiliation: Department of Microbiology, Institute of General and Molecular Biology, Nicolaus Copernicus University, Toruń, Poland. strzelcz@biol.uni.torun.pl
authors.forename: E
authors.initials: E
authors.lastname: Strzelczyk
authors.forename: C Y
authors.initials: CY
authors.lastname: Li
mesh_terms: D032462:Cycadopsida / Q000382:microbiology*; D009792:Oceans and Seas; D041605:Pinus sylvestris; D018517:Plant Roots / Q000382:microbiology* / Q000648:ultrastructure; D011044:Poland; D012822:Silicon Dioxide
chemical_list: D012822:Silicon Dioxide