Plant Viruses Online   

Descriptions and Lists from the VIDE Database

Potato T trichovirus

Index

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

Data collated by A.A. Brunt and L.F. Salazar, 1987.

Nomenclature

Acronym

PVT.

ICTV decimal code

76.0.1.0.002

Host range and symptoms

Natural host range and symptoms

Symptoms disappear soon after infection.
• Solanum tuberosum - usually symptomless but occasionally induces mild leaf mottling.

Transmission

Virus transmitted by mechanical inoculation; transmitted by grafting; not transmitted by contact between plants; transmitted by seed (10-72% in solanaceous hosts); transmitted by pollen to the seed.

Ecology and control

Studies reported by Salazar and Harrison (1978a).

Geographical distribution

Spreads in the South and Central American region; Bolivia and Peru.

Experimental host range

Several (3-9) families susceptible.

Diagnostically susceptible host species and symptoms

• Chenopodium amaranticolor - systemic leaf necrosis.
• C. quinoa - systemic leaf mosaic and tip necrosis.
• Datura stramonium - mild systemic leaf chlorosis.
• Nicotiana debneyi - leaf mottling and systemic necrosis.
• Phaseolus vulgaris - necrotic local lesions and systemic necrosis.

Maintenance and propagation hosts

Chenopodium quinoa.

Assay hosts (Local lesions or Whole plants)

Phaseolus vulgaris (L), Chenopodium amaranticolor (W).

Susceptible host species

• Beta vulgaris
• Catharanthus roseus
• Chenopodium album
• Chenopodium amaranticolor
• Chenopodium ambrosioides
• Chenopodium foetidum
• Chenopodium foliosum
• Chenopodium murale
• Chenopodium quinoa
• Cyamopsis tetragonoloba
• Datura metel
• Datura stramonium
• Datura tatula
• Gomphrena globosa
• Hyoscyamus niger
• Lycopersicon chilense
• Nicandra physalodes
• Nicotiana benthamiana
• Nicotiana clevelandii
• Nicotiana debneyi
• Nicotiana glutinosa
• Nicotiana tabacum
• Phaseolus vulgaris
• Physalis floridana
• Pisum sativum
• Solanum rostratum
• Solanum tuberosum
• Spinacia oleracea
• Stellaria media
• Vicia faba
• Vigna unguiculata
• Vigna unguiculata ssp. sesquipedalis

Insusceptible host species

• Amaranthus caudatus
• Apium graveolens
• Brassica campestris
• Cucumis sativus
• Dianthus barbatus
• Hordeum vulgare
• Lactuca sativa
• Lycopersicon esculentum
• Petunia × hybrida
• Tetragonia tetragonioides
• Trifolium pratense
• Triticum aestivum
• Zea mays

Families containing susceptible hosts

• Amaranthaceae (1/2)
• Apocynaceae (1/1)
• Caryophyllaceae (1/2)
• Chenopodiaceae (9/9)
• Leguminosae-Papilionoideae (6/7)
• Solanaceae (14/16)

Families containing insusceptible hosts

• Amaranthaceae (1/2)
• Caryophyllaceae (1/2)
• Compositae (1/1)
• Cruciferae (1/1)
• Cucurbitaceae (1/1)
• Gramineae (3/3)
• Leguminosae-Papilionoideae (1/7)
• Solanaceae (2/16)
• Tetragoniaceae (1 /1)
• Umbelliferae (1/1)

Sources of host-range data

Salazar and Harrison (1978a).

Physical and biochemical properties

Properties of particles in sap

TIP: 65 °C (in Chenopodium quinoa sap). LIV: 2-4 days (at 20ºC). DEP: log₁₀ minus 5. Leaf sap contains few virions.

Purification method

Salazar and Harrison (1978b).

Particle morphology

Virions filamentous; not enveloped; usually flexuous; with a clear modal length; of 637 nm; 12 nm wide. Axial canal obscure. Basic helix obvious (when virions mounted in UA); pitch of basic helix 3.4 nm.

Physical properties

One sedimenting component in purified preparations; sedimentation coefficient 99 S.

Biochemical properties

Virions contain 95 % nucleic acid; 5 % protein.

Genome consists of RNA; single-stranded; linear. Total genome size 7.5 kb. Genome unipartite; largest (or only) genome part 7.5 kb. Poly A region present; at the 3´terminus.

NCBI sequence data (Entrez search)

Sequence database accession code(s)

• D10172 Gb(84)n:PVTGR Potato virus T genomic RNA, 3´-terminal region. 8/94 2,392bp.

Features of proteins

Virion protein(s) one; M_r 27000; coat protein.

Taxonomy and relationships

Trichovirus

Virus(es) with serologically unrelated virions

Apple chlorotic leafspot, potato M, potato S, potato X and potato Y viruses.

Comments and References

References

• Ochi, M., Kashiwazaki, S., Hiratsuka, K., Namba, S. and Tsuchizaki, T. (1992). Ann. Phytopath. Soc. Japan 58: 416.
• Salazar, L.F. and Harrison, B.D. (1977). Nature, Lond. 265: 337.
• Salazar, L.F. and Harrison, B.D. (1978a). Ann. appl. Biol. 89: 223.
• Salazar, L.F. and Harrison, B.D. (1978b). CMI/AAB Descr. Pl. Viruses No. 187, 4 pp.

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.