Cardamom bushy dwarf virus

Family   : Nanoviridae
Genus    : Babuvirus
Acronym  : CBDV

Introduction

Cardamom bushy dwarf virus (CBDV) is associated with foorkey disease which is a serious constraint to the production of large cardamom (Amomum subulatum, family Zingiberaceae). The disease is characterized by profuse proliferation of excessive stunted shoots, which makes the clump totally unproductive. Nine novel DNA components were isolated and characterized from foorkey affected plants. CBDV contained six major DNA components (DNA-R, -S, -M, -C, -N and -U3) similar to the integral genome components known for the members of the genus Babuvirus in the family Nanoviridae. Additional components, satellite Rep (DNA-sRep1) and unknown components (DNA-Uf1 and -Uf2) were also identified. The size of the genome components ranged from 1028 to 1127 nucleotides.

Major Diseases

Dwarfing disease

Geographical Distribution

Sub Himalayan regions

Particle Morphology

Isometric particles of about 18-20 nm in diameter

Transmission Method

By the aphid, Pentalonia nigronervosa in a persistent manner

Detection

ELISA, PCR and rolling circle amplification

Host Range and Symptomatology ShowHide

Host	Symptoms
Large cardamom	Appearance of numerous stunted pseudostems at the base of the affected clump that gradually becomes unproductive.

References ShowHide

1	Bikash Mandal; Shilpi, S.; Barman, A. R.; Seema Mandal; Anupam Varma, Nine novel DNA components associated with the foorkey disease of large cardamom: evidence of a distinct babuvirus species in Nanoviridae.. 2013, Virus Research, 178, 2, pp 297-305.
2	Mandal, B.; Mandal, S.; Pun, K. B.; Varma, A., First report of the association of a nanovirus with foorkey disease of large cardamom in India.. 2004, Plant Disease, 88, 4, pp 428.
3	Savory, F. R.; Ramakrishnan, U., Cryptic diversity and habitat partitioning in an economically important aphid species complex.. 2015, Infection, Genetics and Evolution, 30, 4, pp 230-237.
4	Savory, F. R.; Ramakrishnan, U., Asymmetric patterns of reassortment and concerted evolution in Cardamom bushy dwarf virus.. 2014, Infection, Genetics and Evolution, 24, 4, pp 15-24.
5	Savory, F. R.; Varun Varma; Uma Ramakrishnan, Identifying geographic hot spots of reassortment in a multipartite plant virus.. 2014, Evolutionary Applications, 7, 5, pp 569-579.
6	Vijayan, A. K.; Gudade, B. A.; Deka, T. N.; Chhetri, P., Status of viral diseases of large cardamom (Amomum subulatum Roxb.) and its management in Sikkim and Darjeeling, West Bengal.. 2014, Journal of Mycology and Plant Pathology, 44, 4, pp 438-441.

Sequences ShowHide