Phytopathology (2000) 90, 120-124

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S.M. Scagliusi and B.E.L. Lockhart (2000)
Transmission, characterization, and serology of a luteovirus associated with yellow leaf syndrome of sugarcane
Phytopathology 90 (2), 120-124
Abstract: A previously uncharacterized luteovirus was associated with one form of yellow leaf syndrome (YLS), a widespread disease of sugarcane (Saccharum sp.). The virus was named Sugarcane yellow leaf luteovirus (ScYLV), and was identified in major sugarcane-producing areas of the world. Typical disease symptoms were reproduced when ScYLV was transmitted by Melanaphis sacchari or Rhopalosiphum maidis from infected to healthy sugarcane, suggesting that this virus may be the causal agent of one form of YLS. The only known hosts of ScYLV are Saccharum and Erianthus spp. Virions of ScYLV were 24 to 29 nm in diameter in sodium phosphotungstate at pH 5.0, had a buoyant density of 1.30 g/cm3 in Cs2SO4, and contained a 5.8-kb genomic ssRNA. The capsid protein had an estimated relative molecular mass of 27 kDa and was not glycosylated. A polyclonal rabbit antiserum raised against ScYLV did not detect any of eight other luteoviruses by enzyme-linked immunosorbent assay or immunosorbent electron microscopy, but in immunoblot assays, antibodies to ScYLV detected the RPV serotype of Barley yellow dwarf luteovirus. It is concluded that ScYLV is a previously undescribed luteovirus that is biologically and serologically distinct from other members of the group and may be the causal agent of one form of YLS of sugarcane.
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Full text of article
Database assignments for author(s): Ben Lockhart

Research topic(s) for pests/diseases/weeds:
transmission/dispersal of plant diseases
general biology - morphology - evolution

Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.

Melanaphis sacchari Sugarcane (Saccharum officinarum)
Rhopalosiphum maidis Sugarcane (Saccharum officinarum)
Sugarcane yellow leaf virus Sugarcane (Saccharum officinarum)