Plant Viruses Online   

Descriptions and Lists from the VIDE Database

Rottboellia yellow mottle sobemovirus

Index

• Nomenclature
• Host range, transmission and symptoms
• Physical and biochemical properties
• Taxonomy and relationships
• Comments and References

Data collated by S.L. Bhattiprolu, 1993.

Nomenclature

ICTV decimal code

67.0.1.DE.01

Host range and symptoms

Natural host range and symptoms

Symptoms persist. Symptoms chlorotic mottling and severe stunting.

Rottboellia cochinchinensis - chlorotic leaf mottling.

Transmission

Virus transmitted by mechanical inoculation.

Geographical distribution

Spreads in Nigeria.

Experimental host range

Few (<3) families susceptible. Experimentally infected plants mostly show systemic chlorotic mottle and stunting.

Diagnostically susceptible host species and symptoms

• Rottboellia cochinchinensis - systemic chlorotic mottle.
• Zea mays - chlorotic spots, systemic mottle and stunting.

Diagnostically insusceptible host species

Chenopodium amaranticolor, Datura stramonium, Glycine max, Oryza sativa, Phaseolus vulgaris, Triticum aestivum.

Maintenance and propagation hosts

Rottboellia cochinchinensis.

Assay hosts (Local lesions or Whole plants)

Rottboellia cochinchinensis (W), Zea mays (W).

Susceptible host species

• Rottboellia cochinchinensis (syn. R. exaltata)
• Zea mays

Insusceptible host species

• Avena sativa
• Beta vulgaris
• Bromus commutatus
• Bromus sterilis
• Capsicum annuum
• Capsicum frutescens
• Chenopodium amaranticolor
• Chenopodium foliosum
• Chenopodium hybridum
• Cucumis melo
• Cucumis sativus
• Cucurbita maxima
• Cyamopsis tetragonoloba
• Datura stramonium
• Glycine max
• Gomphrena globosa
• Helianthus annuus
• Hordeum vulgare
• Lycopersicon esculentum
• Nicotiana benthamiana
• Nicotiana clevelandii
• Nicotiana glutinosa
• Nicotiana tabacum
• Oryza sativa
• Petunia × hybrida
• Phalaris arundinacea
• Phaseolus lunatus
• Phaseolus vulgaris
• Phleum pratense
• Pisum sativum
• Secale cereale
• Triticum aestivum
• Triticum durum
• Vigna unguiculata

Families containing susceptible hosts

• Gramineae (2/12)

Families containing insusceptible hosts

• Amaranthaceae (1/1)
• Chenopodiaceae (4/4)
• Compositae (1/1)
• Cucurbitaceae (3/3)
• Gramineae (10/12)
• Leguminosae-Papilionoideae (6/6)
• Solanaceae (9/9)

Sources of host-range data

Thottapilly et al. (1992).

Purification method

Thottapilly et al., 1992.

Physical and biochemical properties

Particle morphology

Virions isometric; not enveloped; 29 nm in diameter; angular in profile.

Physical properties

One sedimenting component in purified preparations; sedimentation coefficient 114 S (decreasing to c. 87S after EDTA treatment). Density 1.379 g cm^-3 in CsCl. Density two components in caesium sulphate; 1.29-1.31 and 1.32-1.33 g cm^-3. A₂₆₀/A₂₈₀ ratio 1.51.

Biochemical properties

Genome consists of RNA; single-stranded; linear. Total genome size 4.4 kb. Genome unipartite; largest (or only) genome part 4.4 kb. Genomic nucleic acid isolated by Thottapilly et al., 1992. Infectivity lost when deproteinised with proteases. Additional factor required for infectivity.

Features of the genome

Non-genomic nucleic acid not found in the virions.

Features of proteins

Virion protein(s) one; M_r 27000; coat. Method of preparation: Thottapilly et al., 1992.

Cytopathology

Virions found in leaves; in cytoplasm and in cell vacuoles. Inclusions present in infected cells; are crystals in the cytoplasm (virion aggregates); they contain virions.

Taxonomy and relationships

Sobemovirus

Virus(es) with serologically unrelated virions

Cocksfoot mild mosaic, cocksfoot mottle, cynosurus mottle, lucerne transient streak, panicum mosaic, rice yellow mottle and sowbane mosaic viruses.

Comments and References

References

• Thottapilly, G., van Lent, J.W.M., Rossel, H.W. and Sehgal, O.P. (1992). Ann. appl. Biol. 120: 405.

Cite this publication as: Brunt, A.A., Crabtree, K., Dallwitz, M.J., Gibbs, A.J., Watson, L. and Zurcher, E.J. (eds.) (1996 onwards). `Plant Viruses Online: Descriptions and Lists from the VIDE Database. Version: 20^th August 1996.' URL http://biology.anu.edu.au/Groups/MES/vide/

Dallwitz (1980) and Dallwitz, Paine and Zurcher (1993) should also be cited.