SCIENCE PROTECTING PLANT HEALTH 26-28 September, 2017, Brisbane, Australia Diversity of Brevipalpus-transmitted plant viruses EW Kitajima 1 , J Freitas-Astúa 2,3 , PL Ramos-González 3 & RG Dietzgen 4 1 ESALQ/Universidade de São Paulo, Piracicaba, 13418-900 Piracicaba, SP, Brazil; 2 Embrapa Cassava and Fruits, 4438-000 Cruz das Almas, BA, Brazil; 3 Instituto Biológico, 04014-900 São Paulo, SP, Brazil; 4 QAAFI, The University of Queensland, St.Lucia, QLD 4072, Australia [email protected]Fapesp/Univ.Queensland Sprint Program 2017/50039-1
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Diversity of Brevipalpus-transmitted plant viruses · Brevipalpus-transmitted plant viruses: an overview The viruses Cytoplasmic type-Cilevirus Higrevirus Nuclear type Dichorhavirus
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SCIENCE PROTECTING PLANT HEALTH26-28 September, 2017, Brisbane, Australia
Diversity of Brevipalpus-transmitted plantviruses
EW Kitajima1, J Freitas-Astúa2,3, PL Ramos-González3 & RG Dietzgen4
1ESALQ/Universidade de São Paulo, Piracicaba, 13418-900 Piracicaba, SP, Brazil; 2Embrapa Cassava and Fruits, 4438-000 Cruz das Almas, BA, Brazil; 3Instituto Biológico, 04014-900 São Paulo, SP, Brazil; 4QAAFI, The University of Queensland, St.Lucia, QLD 4072, Australia
Local necrotic lesions onbean leaf experimentallyinfected with CiLV-C
Geographic distribution of BTV (except OFV, present worldwide)
BTV- CYTOPLASMIC TYPECilevirus: bipartite (5 & 9 kb) ssRNA (+). Short, bacilliform, membrane boundedparticles. Accumulate in the ER. Dense, vacuolated viroplasma in the cytoplasm.Type member- CiLV-C; recognized member- CiLV-C2
Higrevirus: similar but tripartiteType and sole member- HGSV-2
BTV- NUCLEAR TYPEDichorhavirus: bipartite (2 x 6kb) ssRNA (-), member of Rhabdoviridae. Short, rod-like particles in the nucleus and cytoplasm. Electron lucent nuclear viroplasm.Type member: OFV; recognized member- CoRSV
Economically important diseases-Citrus leprosis-Coffee ringspot-Passion fruit green spot-Orchid fleck
Citrus leprosis
CoRSV
PfGSV
OFV
Genome organization of BTV
BTV-CCilevirusCiLV-C(Locali et al., 2006)
BTV-NDichorhavirus(Rhabdoviridae)OFV(Kondo et al., 2006)
-BTV, likely are present in other geographic regionsoutside the Americas and Hawaiian islands.
-Isolates of OFV were found infecting citrus (Mexico,Colombia) and an ornamental in Australia, and similarincidents may have occurred elsewhere, since this virusis distributed worldwide.
-Significant diversity has been found within Cilevirus andDichorhavirus.