Plant Viruses Online   

Descriptions and Lists from the VIDE Database

Banana bunchy top nanavirus

Index

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

Data collated by J.L. Dale, 1986. Revised 1991.

Nomenclature

Synonyms

abaca bunchy top virus.

Acronym

BBTV

ICTV decimal code

79.0.P.1.001

Host range and symptoms

Natural host range and symptoms

Symptoms persist. Symptoms chlorosis, stunting.
• Musa spp. - chlorosis, stunting, death.

Transmission

Transmitted by a vector; an insect; Pentalonia nigronervosa; Aphididae. Transmitted in a persistent manner. Virus probably retained when the vector moults; not transmitted congenitally to the progeny of the vector; not transmitted by mechanical inoculation.

Ecology and control

Studies reported by Magee (1940 and 1953).

Geographical distribution

Spreads in the African region and the Pacific region; Australia, Burundi, Egypt, Gabon, the Philippines, and Taiwan.

Experimental host range

Few (<3) families susceptible. Experimentally infected plants mostly show chlorosis, stunting.

Diagnostically susceptible host species and symptoms

• Musa sapientum cv. Cavendish - chlorosis, stunting.

Maintenance and propagation hosts

Musa spp.

Susceptible host species

• Musa
• Musa sapientum (cv. Cavendish)

Families containing susceptible hosts

• Musaceae (2/2)

Physical and biochemical properties

Properties of particles in sap

Leaf sap contains few virions.

Particle morphology

Virions isometric; not enveloped; 18-20 nm in diameter; rounded in profile; without a conspicuous capsomere arrangement.

Biochemical properties

Genome consists of DNA; single-stranded; circular; of three parts (J. Dale, personal communication); largest (or only) genome part the largest 1.3 kb; the 2nd largest 1.3 kb; the 3rd largest 1.171 kb. Genomic nucleic acid isolated by Dale et al. (1986).

NCBI sequence data (Entrez search)

Sequence database accession code(s)

• L32166 Gb(84)n:BYTV1 Banana bunchy top virus (BBTV DNA I) V1 and C1-C3 genes, complete cds's. 8/94 1,106bp.
• L32167 Gb(84)n:BYTV2 Banana bunchy top virus (BBTV DNA II) V1, V2, C1 and C2 genes, complete cds's. 8/94 1,096bp.
• S56276 Em(40)_vi:S56276 Gb(84)_vi:S56276 orf V1 (component 1) banana bunchy top virus BBTV, Genomic, 1111 nt. 1/94 1,111bp.
• U02312 Em(40)_vi:BBU02312 Gb(84)_vi:U02312 Banana bunchy top virus component 2. 6/94 1,095bp
• L41574 Gb(89)n:Bytorfaa Banana bunchy top virus gene, complete cds. 6/95 1,075bp.
• L41575 Gb(89)n:Bytorfab Banana bunchy top virus gene, complete cds. 6/95 1,043bp.
• L41576 Gb(89)n:Byttataaa Banana bunchy top virus gene, TATA and polyA signals. 6/95 1,060bp.
• L41577 Gb(89)n:Bytorfac Banana bunchy top virus gene, complete cds. 6/95 1,089bp.
• L41578 Gb(89)n:Bytorfad Banana bunchy top virus gene, complete cds. 6/95 1,018bp.
• U12586 Em(43)_vi:Bb12586 Gb(89)_vi:Bbu12586 Banana bunchy top virus DNA I II ORF V1 and ORF C1 genes, complete cds. 2/95 1,111bp.
• U12587 Em(43)_vi:Bb12587 Gb(89)_vi:Bbu12587 Banana bunchy top virus DNA IV ORF V1 and ORF C1 genes, complete cds. 2/95 1,127bp.
• U18077 Em(43)_vi:Bb18077 Gb(89)_vi:Bbu18077 Banana bunchy top virus putative replicase and hypothetical 13.8 kDa protein, component 1 DNA
• U18078 Em(43)_vi:Bb18078 Gb(89)_vi:Bbu18078 Banana bunchy top virus unknown protein, component 3 DNA, complete cds. 12/94 1,057bp.
• U18079 Em(43)_vi:Bb18079 Gb(89)_vi:Bbu18079 Banana bunchy top virus unknown protein, component 4 DNA, complete cds. 12/94 1,017bp.

Features of proteins

Virion protein(s) one; M_r 20000; virion protein.

Cytopathology

Virions found in phloem.

Taxonomy and relationships

nanavirus

Additional comments on relationships

In nucleic acid hybridization tests, its genome reacts distantly with that of abaca bunchy top virus. It was originally thought to be a luteovirus: infected plants sometimes contain dsRNA, but these may come from a contaminant virus.

Comments and References

References

• Dale, J.L. (1987). Adv. Virus Res. 33: 301.
• Magee, C.J.P. (1940). J. Aust. Inst. Agric. Sci. 6: 109.
• Magee, C.J.P. (1953). J. Proc. R. Soc. N.S.W. 87: 3.

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.