Rice tungro bacilliform virus

Family   : Caulimoviridae
Genus    : Tungrovirus
Acronym  : RTBV

Introduction

Rice tungro bacilliform virus is a pararetrovirus of the Tungrovirus genus that causes severe stunting and yellowing of infected plants. RTBV along with rice tungro spherical virus cause tugro disease of rice.

Major Diseases

Tungro disease.

Geographical Distribution

Eastern and southern rice growing regions.

Particle Morphology

Non enveloped bacilliform shaped particles of 110-400 x 30-55 nm.

Transmission Method

Leaf hopper- Nephotettix cincticeps, N. virescens, N. parvus, N. nigropictus semipersistently. Virus is lost in molting and do not multiply in vector body, requires helper virus RTSV for transmission. RTBV is acquired only in the presence of RTSV or, the vector should have fed earlier on RTSV infected plants. Not transmitted mechanically and through seed.

Detection

ELISA, LAMP, Real-time PCR and PCR.

Host Range and Symptomatology ShowHide

Host	Symptoms
Rice	Yellow to orange discolouration of leaf margins, followed by the discoluration of the whole leasves, stunting and sterility, reduced number of ear bearing tillers and panicles, reduced filling of grains, grains with dark blotches and with less starch and less yield.

References ShowHide

1	Amrita Banerjee ; Somnath Roy ; Jayanta Tarafdar, Phylogenetic analysis of Rice tungro bacilliform virus ORFs revealed strong correlation between evolution and geographical distribution.. 2011, Virus Genes, 43, 3, pp 398-408.
2	Anjaneyulu, A. ; Bhaktavatsalam, G. ; Shenoi, M. M., Reaction of tungro (RTV) isolates on Taichung Native 1.. 1986, International Rice Research Newsletter, 11, 5, pp 18.
3	Bhaktavatsalam, G. ; Anjaneyulu, A., Identifying tungro viruses by the transmission method.. 1986, International Rice Research Newsletter, 11, 6, pp 19-20.
4	Cabunagan, R. C. ; Angeles, E. R. ; Tiongco, E. R. ; Villareal, S. ; Azzam, O. ; Teng, P. S. ; Khush, G. S. ; Chancellor, T. C. B. ; Truong, X. H. ; Mancao, S. ; Astika, I. G. N. ; Muis, A. ; Chowdhury, A. K. ; Ganapathy, T. ; Subramanian, N., Multilocational evaluation of promising advanced breeding lines for resistance to rice tungro viruses.. 1998, International Rice Research Notes, 23, 1, pp 15.
5	Chowdhury, A. K. ; Mallick, S. C. ; Pal, D., Comparative estimation on the growth and yield components of tungro virus infected and healthy rice plants with different levels of resistance to virus and vector.. 1999, Journal of Mycopathological Research, 37, 1, pp 29-32.
6	Kamble, P. U. ; Ramesh, M. ; Surjeet Singh ; Patil, D. V., Survival rate of Tungro virus disease transmitor (Nenhotettix virescens) on resistant and susceptible genotypes of rice.. 2006, Annals of Plant Physiology, 20, 1, pp 112-115.
7	Kamble, P. U. ; Ramiah, M. ; Patil, D. V. ; Surjit Singh, Combining ability of the resistant donor for tungro virus disease in susceptible genotypes of rice (Oryza sativa L.).. 2004, Plant Archives, 4, 1, pp 167-170.
8	Khush, G. S. ; Angeles, E. ; Virk, P. S. ; Brar, D. S., Breeding rice for resistance to tungro virus at IRRI.. 2004, SABRAO Journal of Breeding and Genetics, 36, 2, pp 101-106.
9	Mallick, S. C. ; Chowdhury, A. K. ; Pal, D., Ischaemum rugosum - a potential alternate host of rice tungro viruses in West Bengal.. 1999, International Rice Research Notes, 24, 1, pp 28-29.
10	Mangrauthia, S. K. ; Malathi, P. ; Surekha Agarwal ; Ramkumar, G. ; Krishnaveni, D. ; Neeraja, C. N. ; Madhav, M. S. ; Ladhalakshmi, D. ; Balachandran, S. M. ; Viraktamath, B. C., Genetic variation of coat protein gene among the isolates of Rice tungro spherical virus from tungro-endemic states of the India.. 2012, Virus Genes, 44, 3, pp 482-487.
11	Mangrauthia, S. K. ; Malathi, P. ; Surekha Agarwal ; Sailaja, B. ; Jagrati Singh ; Ramkumar, G. ; Krishnaveni, D. ; Balachandran, S. M., The molecular diversity and evolution of Rice tungro bacilliform virus from Indian perspective.. 2012, Virus Genes, 45, 1, pp 126-138.
12	Manoranjitham, S. K. ; Kavino, M. ; Thiribhuvanamala, G. ; Ganapathy, T. ; Rabindran, R. ; Kumar, N., Detection of banana [AB1] streak virus (BSV) Tamil Nadu isolate (India) and its serological relationship with other badna viruses.. 2012, African Journal of Biotechnology, 11, 81, pp 14632-14637.
13	Muthulakshmi, P. ; Narayanasamy, P., Changes in the nucleic acid contents in rice following antiviral principle application and inoculation with rice tungro virus.. 2001, Madras Agricultural Journal, 88, 01-Mar, pp 158-160.
14	Nagaraju, P. ; Dronavalli, N. ; Biradar, D. P., Effects of genotypes and insecticide application on tungro disease incidence and grain yield of rice.. 2001, International Rice Research Notes, 26, 2, pp 39-40.
15	Nath, N. ; Mathur, S. ; Dasgupta, I., Molecular analysis of two complete rice tungro bacilliform virus genomic sequences from India.. 2002, Archives of Virology, 147, 6, pp 1173-1187.
16	Radhakrishnan, G. ; Niazi, F. R., Reaction of rice hybrids and basmati varieties to tungro infection and indexing for rice tungro bacilliform virus with DNA probes.. 2000, Indian Phytopathology, 53, 2, pp 129-133.
17	Rekha Joshi ; Indranil Dasgupta, Cloning and molecular analysis of DNA of rice tungro bacilliform viruses from different rice growing regions of India.. 2001, Indian Phytopathology, 54, 4, pp 469-475.
18	Saloni Mathur ; Indranil Dasgupta, Further support of genetic conservation in Indian isolates of Rice tungro bacilliform virus by sequence analysis of an isolate from North-Western India.. 2013, Virus Genes, 46, 2, pp 387-391.
19	Sharma, S. ; Rabindran, R. ; Robin, S. ; Dasgupta, I., Analysis of the complete DNA sequence of rice tungro bacilliform virus from southern India indicates it to be a product of recombination.. 2011, Archives of Virology, 156, 12, pp 2257-2262.
20	Terafdar, J. ; Chowdhury, A. K., Variation on the susceptibility of rice tungro virus components in respect to variety and vector Nephotettix virescens.. 2002, Journal of Mycopathological Research, 40, 1, pp 17-20.
21	Vidhu Verma ; Indranil Dasgupta, Molecular analysis of coat protein genes of Rice tungro spherical virus from eastern and southern India.. 2007, Indian Phytopathology, 60, 1, pp 99-104.

Sequences ShowHide