Plant Viruses Online   

Descriptions and Lists from the VIDE Database

Blackgram mottle (?) carmovirus

Index

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

Data collated by H.C. Phatak, 1983.

Nomenclature

Acronym

BMoV

ICTV decimal code

74.0.2.T.014

Host range and symptoms

Natural host range and symptoms

Symptoms persist.
• Vigna mungo - mottling, puckering, vein clearing and malformation of leaves.

Transmission

Transmitted by a vector; an insect; Ceratoma trifurcata, Epilachna varivestis; Coleoptera. Virus does not require a helper virus for vector transmission; transmitted by mechanical inoculation; transmitted by seed (8% in Vigna mungo).

Geographical distribution

Spreads in the Pacific region; Australia, India, the Philippines, and Thailand.

Experimental host range

Few (<3) families susceptible. Experimentally infected plants mostly show necrotic local lesions, mosaics.

Diagnostically susceptible host species and symptoms

• Cyamopsis tetragonoloba, Phaseolus lunatus, Phaseolus vulgaris cv. Pinto, Vicia faba - necrotic local lesions; not systemic.
• Phaseolus vulgaris cv. Black Valentine - systemic mosaic, leaf malformation.
• Vigna radiata - necrotic local lesions; systemic mosaic.

Diagnostically insusceptible host species

Chenopodium spp., Glycine max, Sesamum indicum, Nicotiana clevelandii.

Maintenance and propagation hosts

Cyamopsis tetragonoloba, Phaseolus vulgaris cv. Black Valentine.

Assay hosts (Local lesions or Whole plants)

Cyamopsis tetragonoloba (L), Macrotyloma uniflorum (L), Phaseolus lunatus (L), P. vulgaris cvs Pinto, Puregold (L).

Susceptible host species

• Cyamopsis tetragonoloba
• Glycine max
• Lablab purpureus
• Macroptilium lathyroides
• Macrotyloma uniflorum
• Phaseolus lunatus
• Phaseolus vulgaris
• Pisum sativum
• Sesamum indicum
• Vicia faba
• Vigna mungo
• Vigna radiata
• Vigna unguiculata

Insusceptible host species

• Chenopodium amaranticolor
• Chenopodium quinoa
• Cyamopsis tetragonoloba
• Datura stramonium
• Glycine max
• Gomphrena globosa
• Nicotiana clevelandii
• Nicotiana glutinosa
• Nicotiana rustica
• Ocimum basilicum
• Sesamum indicum

Families containing susceptible hosts

• Leguminosae-Papilionoideae (12/12)
• Pedaliaceae (1/1)

Families containing insusceptible hosts

• Amaranthaceae (1/1)
• Chenopodiaceae (2/2)
• Labiatae (1/1)
• Leguminosae-Papilionoideae (2/12)
• Pedaliaceae (1/1)
• Solanaceae (4/4)

Sources of host-range data

Phatak (1974).

Physical and biochemical properties

Properties of particles in sap

TIP: 90-92 °C. LIV: 45 days. DEP: log₁₀ minus 5. Infectivity of sap not changed by treatment with di-ethyl ether. Leaf sap contains many virions.

Purification method

Scott and Phatak (1979).

Particle morphology

Virions isometric; not enveloped; 28 nm in diameter; angular in profile; with a conspicuous capsomere arrangement.

Physical properties

One sedimenting component in purified preparations; sedimentation coefficient 122 S. Density 1.364 g cm^-3 in CsCl.

Biochemical properties

Genome consists of RNA; single-stranded. Base composition 24.9 % G; 25.9 % A; 25.2 % C; 24 % U.

Features of the genome

Non-genomic nucleic acid not found in the virions.

Features of proteins

Virion protein(s) one; M_r 38200. Method of preparation: Scott and Phatak (1979).

Cytopathology

Virions found in mesophyll, epidermis and in the lumen of xylem; in cytoplasm and in mitochondria. Inclusions absent from infected cells. Other cellular changes: cell membrane proliferation in association with dictyosomes and endoplasmic reticulum, accumulation of Golgi vesicles.

Taxonomy and relationships

Possible Carmovirus: Tombusviridae

Virus(es) with serologically unrelated virions

Southern bean mosaic (type and cowpea strain), broad bean mottle, cowpea severe mosaic, bean pod mottle, cowpea chlorotic mottle, quail pea mosaic, cowpea mottle, bean mild mottle and more than 35 other isometric viruses.

Comments and References

References

• Phatak, H.C. (1974). Seed Sci. Technol. 2: 3.
• Scott, H.A. and Hoy, J.W. (1981). CMI/AAB Descr. Pl. Viruses No. 237, 4 pp.
• Scott, H.A. and Phatak, H.C. (1979). Phytopathology 69: 346.

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.