title: Cocksfoot mottle sobemovirus establishes infection through the phloem.
abstract: Cocksfoot mottle virus (CfMV) localization in oat plants was analyzed during three weeks post infection by immunohistochemical staining to follow its spread through different tissues. In early stages of infection, the virus was first detectable in phloem parenchyma and bundle sheath cells of inoculated leaves. Bundle sheath and phloem parenchyma were also the cell types where the virus was first detected in stems and systemic leaves of infected plants. In later stages of infection, CfMV spread also into the mesophyll surrounding vascular bundles and was seldom detected in xylem parenchyma of inoculated leaves. In systemic leaves, CfMV was not detected from xylem. Moreover, sometimes it was found from phloem only. In straw and roots, CfMV was detected both from phloem and xylem. According to our observations, CfMV predominantly moves through phloem, which makes the systemic movement of CfMV different from that of another monocot-infecting sobemovirus, Rice yellow mottle virus (RYMV).
authors.affiliation: Department of Gene Technology, Tallinn University of Technology, Akadeemia tee 15, 12618 Tallinn, Estonia.
authors.forename: Maarja
authors.initials: M
authors.lastname: Otsus
authors.forename: Gabriela
authors.initials: G
authors.lastname: Uffert
authors.forename: Merike
authors.initials: M
authors.lastname: Sõmera
authors.forename: Heiti
authors.initials: H
authors.lastname: Paves
authors.forename: Allan
authors.initials: A
authors.lastname: Olspert
authors.forename: Bulat
authors.initials: B
authors.lastname: Islamov
authors.forename: Erkki
authors.initials: E
authors.lastname: Truve
mesh_terms: D018554:Avena / Q000821:virology*; D007150:Immunohistochemistry; D052585:Phloem / Q000821:virology; D010935:Plant Diseases / Q000821:virology*; D018515:Plant Leaves / Q000821:virology; D018517:Plant Roots / Q000821:virology; D018547:Plant Stems / Q000821:virology; D010942:Plant Viruses / Q000472:pathogenicity*; D012328:RNA Viruses / Q000472:pathogenicity*; D052584:Xylem / Q000821:virology