S. CHAKRABORTY

SUPRIYA CHAKRABORTY Professor School of Life Sciences Jawaharlal Nehru University New Delhi - 110067, India. Room No.: 405, 416 Off. Phone: 26704153 E-mail : schakraborty@mail.jnu.ac.in , supriyachakrasls@yahoo.com
Education: Ph. D. (1993-1997) : Indian Agricultural Research Institute, New Delhi. Career: 1996 - 2000 Scientist, Indian Institute of Vegetable Research (IIVR), Varanasi 2000 - 2004 Scientist (Sr. Scale), IIVR, Varanasi 2004 – 2010 Associate Professor, School of Life Sciences, JNU. 2010 – present Professor, School of Life Sciences, JNU. Area of Research: Begomoviruses : Molecular biology, host virus interaction, RNAi and transgenic resistance Research in our laboratory targets interfering with interactions between plant viruses and their hosts, and developing strategies to control begomoviruses in plants. We are currently studying steps of begomovirus pathogenesis especially how they enter into nucleus, replicate, and spread throughout the host. We also aim to identify host genes that respond to infection. Virus replication is regulated by both host-encoded and virus-encoded genes. Similarly, host cells and tissues respond to infection by viruses and either permit or restrict replication and local and long distance spread of infection. We are engaged in studies to determine how successful pathogenesis is established and developing strategies to control infection and to restrict replication and spread of begomoviruses Begomoviruses (Family – Geminiviridae) are very destructive viruses that can cause devastating diseases in vegetable crops in all tropical regions of the world including India. Their genomes are composed of circular single stranded DNA and they are subjected to gene silencing through an unknown mechanism. We have demonstrated that virulent pseudo-recombination and synergism between two distinct species of begomoviruses, Tomato leaf curl New Delhi virus (ToLCNDV) and Tomato leaf curl Gujarat virus (ToLCGV-Var) that infect tomato, reasons of which are being investigated in our laboratory. RNAi mediated host recovery and role of suppressors of PTGS in modulating symptom expression is also being analyzed in our laboratory. We have developed virus induced gene silencing (VIGS) vector to identify role of plant gene(s) responsible for either facilitating or restricting viral pathogenesis. We are also assessing molecular diversity among begomoviruses causing leaf curl disease in chillies, tomato, radish and okra. We have identified several distinct new species of begomoviruses causing severe leaf curl diseases on tomato (Tomato leaf curl Gujarat virus & Tomato leaf curl Patna virus) on radish (Radish leaf curl virus) and also on chillies. We discovered a wealth of infectious viral molecules from chilli and we also found that together they do cause a disease; we are now attempting to determine the molecular mechanisms behind this phenomenon. For the first time, we have demonstrated Koch’s postulates using clone DNA molecules associated with chilli leaf curl disease by agroinoculation. Recently, we have initiated to develop strategies for generating broad spectrum resistance against begomoviruses. Research Projects Development of transgenic resistance against Bhindi yellow mosaic virus, DBT, 2012-2015. Engineering broad-spectrum resistance against geminiviruses, DBT, 2011-2014. Engineering broad-spectrum resistance against plant-infecting RNA viruses, CSIR, 2011-2014. Engineering RNAi mediated broad-spectrum resistance against chilli begomoviruses, DBT, 2010-2013. Molecular identification and characterization of virulence factors of Tomato leaf curl virus, DST, 2010-2013. Molecular diversity of begomoviruses causing chilli leaf curl disease and identification of virulence factors, DBT, 2007-2010. Strategy for engineering broad-spectrum resistance against geminiviruses, DBT, 2006-2010. Molecular determinants of supervirulent pseudo-recombinant and asymmetric synergism between genomic components of two distinct begomoviruses causing severe leaf curl disease on tomato in India, International Foundation for Science, Sweden, 2006-2008. Molecular Characterization of Pepper leaf curl geminivirus and development of DNA based screening technique, DST, 2005-2008. Development of transgenic cowpea (Vigna unguiculata L.) resistant to cowpea golden mosaic geminivirus, ICAR (2000 - 2003). Molecular characterization of whitefly transmitted geminiviruses infecting selected leguminous vegetable crops, ICAR Lal Bahadur Shastri young Scientist award project (2001 – 2004). Detection and differentiation of whitefly transmitted geminiviruses infecting cucurbitaceous vegetable crops, ICAR, 2003-2004. Awards and Honour Pran Vohra Award by the Indian Science Congress Association during 2005. Dr. Harbhajan Singh Award by the Indian Society of Vegetable Science during 2005. BOYSCAST fellowship by the Department of Science and Technology, Govt. of India, during 2002 for one year Advanced training in Molecular Virology at Danforth Plant Science Center, Saint Louis, Missourie, USA. Lal Bahadur Shastri Award by the Indian Council of Agricultural Research (ICAR), New Delhi during 2000. Best Oral paper presentation in the National Symposium on Biotechnology of Plant Protection held at BHU, Varanasi 2000. Jawahar Lal Nehru Award by the ICAR, New Delhi during1998. Best student of Indian Agricultural Research Institute (IARI), New Delhi during 1997. IARI Merit medal during1997. Best student of Plant Pathology IARI, New Delhi during 1997. Best student of Plant Pathology of Banaras Hindu University (BHU), Varanasi 1993. IARI Senior Research Fellowship by the IARI, New Delhi 1993. Membership Life member of Indian Science Congress Association. Life member of Indian Phytopathological Society. Life member of Indian Virological Society. Selected Publications Singh, AK., Chattopadhyay, B. and Chakraborty, S. 2012. Biology and interactions of two distinct monopartite begomoviruses and betasatellites associated with radish leaf curl disease in India. Virology Journal 2012, 9:43. Vinoth Kumar, R., Singh, A. K. and Chakraborty, S. 2012. A new monopartite begomovirus species, Chilli leaf curl Vellanad virus, and associated betasatellites infecting chilli in the Vellanad region of Kerala, India. New Disease Reports (Plant Pathology) 25, 20. [doi:10.5197/j.2044-0588.2012.025.020]. George, B., Mashhood Alam, Ch., Jain, SK., Sharfuddin, Ch. and Chakraborty, S. 2012. Differential distribution and occurrence of SSRs in diverse geminivirus genomes. Virus Genes (accepted). Vinothkumar, R., Sharma, V.K., Chattopadhyay, B. and Chakraborty, S. 2012. An improved plant regeneration and Agrobacterium-mediated transformation of red pepper (Capsicum annuum L.). Physiology and Molecular Biology of Plants (accepted). Kumari, P., Singh AK, Sharma VK, Chattopadhyay B, Chakraborty, S. 2011. A novel recombinant tomato-infecting begomovirus capable of. Archieves of Virology. 156(5):769-83. Kumari, P., Singh AK, Chattopadhyay B, Chakraborty, S. 2011. A new begomovirus species and betasatellite causing severe tomato leaf curl disease in Ranchi, India. Plant Pathology 23,11 [doi:10.5197/j.2044-0588.2011.023.011]. Kumari, P., Singh AK, Chattopadhyay B, Chakraborty, S. 2010. Molecular characterization of a new species of Begomovirus and betasatellite causing leaf curl disease of tomato in India. Virus Research 152 (2010) 19–29. Sahu, P.P, Rai, N.K, Chakraborty, S., Singh, M., Prasanna, H.C., Ramesh, B., Chattopadhyay, D. and Prasad, M. 2010. Tomato cultivar tolerant to Tomato leaf curl New Delhi virus infection induces virus-specific short interfering RNA accumulation and defence-associated host gene expression. Molecular Plant Pathology. 11(4): 531-544. Kushwaha, N, Singh, A.K., Chattopadhyay, B. Chakraborty S. 2010. Recent advances in Geminivirus detection. The Journal of Plant Protection Sciences,(1) : 1-18. Kumari, P., Chattopadhyay, B., Singh, A.K and Chakraborty, S. 2009. A New Begomovirus Species Causing Tomato Leaf Curl Disease in Patna, India. Plant Disease. 95(5):595 Singh, A. K. Mishra K. K., Chattopadhyay, B. and Chakraborty, S. 2009. Biological and Molecular characterization of a Begomovirus associated with yellow mosaic vein mosaic disease of pumpkin from Northern India. Virus Genes. 39(3):359-70. Chakraborty S. 2008. Tomato Leaf Curl Viruses from India. Encyclopedia of Virology, 5 vols. (B.W.J. Mahy and M.H.V. Van Regenmortel, Editors), pp. 124-133 Oxford: Elsevier. Chakraborty, S., Vanitharani, R., Chattopadhyay, B. and Fauquet, C.M. 2008. More virulent recombination and asymmetric synergism between two distinct species of causing tomato leaf curl disease in India. Journal of General Virology, 89 (3), 818–828. Chattopadhyay, B., Singh, A.K., Yadav, T., Fauquet, C.M., Sarin, N.B. and Chakraborty, S. 2008. Infectivity of the cloned components of a begomovirus: DNA beta causing chilli leaf curl disease in India. Archieves of Virology 153(3):533-539. Singh AK, Chattopadhyay B, Pandey PK, Singh AK and Chakraborty, S. 2007. First report of a new species of Begomovirus causing leaf curl disease of radish in India. Plant Disease 91 (8), 1053. Singh SK, Chakraborty S, Singh AK, Pandey PK. 2006. Cloning, restriction mapping and phylogenetic relationship of genomic components of MYMIV from Lablab purpureus. Bioresource Technology 1807-1814. Chakraborty, S., B Singh and P K Pandey. (2005). An evaluation of the reactions of okra cultivars and breeding Selections to okra leaf curl geminivirus. **Annals of Applied Biology** (Tests of Agrochemicals and Cultivars) 26: 32-33. Chakraborty, S., Pandey, P.K., Banerjee, M.K., Kalloo, G. and Fauquet, C.M.(2003).Tomato leaf Gujarat virus, a new begomovirus species causing a severe leaf curl disease of tomato in Varanasi, India. *Phytopathology* 93 (12): 1485-1496. Chakraborty, S., Pandey, P.K., Banerjee, M.K., Kalloo, G. and Fauquet, C.M.(2003).A new begomovirus species causing tomato leaf curl disease in Varanasi, India. *Plant Disease. 87(3): 313. Chakraborty, S.,* Raj Kumar and M. (2003).Identification of resistant sources to cowpea golden mosaic geminivirus. *Vegetable Science* 30(2): 101-105. Singh M, Kumar S, Srivastava K, Chakraborty S, Kumar PA, Kalloo G and Banerjee MK.(2003). Transfer of crystal protein gene (Cry1Ab) to brinjal (Solanum melongena L.). *Indian J. Plant Physiol. (Spl. Issue) 630-633. Chattopadhyay, B., B. Rai and Chakraborty, S. (2002). In vitro* efficacy of some systemic fungicides against Fusarium oxysporum f. sp. Iycopersici. Annals of Applied Biology(Tests of Agrochemicals and Cultivars), 22:008-009. Chakraborty, S., Sinha, A. and Pandey, P. K. (2002).Viruses of vegetable crops: biology, detection and management. In: Microbes and Plants (ed. Asha Sinha), Kalyani Publishers, India, p 198-225. Chakraborty, S. Anupam Varma and V.G. Malathi. (2001). Molecular characterization of mungbean yellow mosaic geminivirus - a novel approach for engineering transgenic resistance. In proceedings of International Conference on Environment and Agriculture, held in Kathmandu, Nepal, Nov. 1-3, 1998, p.376-382. Singh, M., Chakraborty, S., Srivastava, K. and Kalloo, G. (2000). Biotechnological advances in improvement of vegetable crops. . In : Emerging Scenario in Vegetable Research and Development (Eds. G. Kalloo and Kirti Singh), Research Periodicals and Book Publishing House, India, pp 58-84. Chakraborty, S., M. Singh, G. Kalloo, M. K. Banerjee and P. K. Pandey. (2000). Screening of cowpea cultivars against cowpea golden mosaic geminivirus. *Annals of Applied Biology* (Tests of Agrochemicals and Cultivars) 20: 40-41. Singh, M, Chakraborty, S., A.K. Singh, P.M.Singh and G. Kalloo. (1999). Seed protein electrophoresis for varietal identification of cowpea (Vigna unguiculata). *Seed Research29:1-6. Chakraborty, S., P. K. Pandey and B. Singh. (1997). Okra enation leaf curl disease- a threat to cultivation of okra (Abelmoschus esculentus* L). Vegetable Science 24 (1): 52-54. Chakraborty, S., A. Sinha and P. K. Pandey. (1997). Occurrence of watermelon mosaic virus- I on bottle gourd [Lagenaria siceraria ( Mol. ) Standl ]. *Vegetable Science* 24(2): 147-149. Chakraborty, S., A. Sinha and B.V.B. Reddy. (1995). Post infection changes in total nitrogen, total phosphorus and protein contents of cucurbit plants affected by cucumber mosaic virus. Advances in Plant Sciences 8(2): 417-419. Chakraborty, S. and A. Sinha. (1994). A mosaic disease of pumpkin (Cucurbita moschata in Varanasi region. *Crop Research* 8(1): 196-198. Chakraborty, S., A. Sinha and B.V.B. Reddy. (1994). Effect of cucurbit mosaic viruses on chlorophyll and total phenol content of cucurbits. *Crop Research7(3): 461-465 Referred Papers in Published Conference Proceedings* Chakraborty, S., Singh, A.K., Chattopadhyay, B., Kushwaha ,.N., Vinoth Kumar R, Basu, S. Synergistic interaction among diverse begomoviruses results in leaf curl disease of chillies in India. In: The 6th International Geminivirus Symposium, held at Guanajuato, Mexico during November 7-12, 2010. (invited lecture)* Kushwaha, N., Sahu, P. P., Manoj Prasad and Chakraborty, S. Altered Gene Expression Profile of Resistant Chilli Genotype Infected With Chilli Leaf Curl Virus In: The 6th International Geminivirus Symposium, held at Guanajuato, Mexico during November 7-12, 2010. Sahu, P. P., Chakraborty, S., Singh, M, Chattopadhyay, D and Manoj Prasad Altered Gene Expression Profile of Resistant Chilli Genotype Infected With Chilli Leaf Curl Virus In: The 6th International Geminivirus Symposium, held at Guanajuato, Mexico during November 7-12, 2010. George, B., Bhardwaj, A., Prabu, G., Alam, C. M. and Chakraborty, S. Characterization of replication initiator protein of Tomato Leaf Curl New Delhi Virus (ToLCNDV). In: Conference on Whitefly and thrips transmitted viruses, to be held at UDSC, New Delhi during August 27-28, 2010. Basu, S., George, B. and Chakraborty, S. Identification of post transcriptional gene silencing (PTGS) suppressors in Tomato Leaf Curl New Delhi Virus (ToLCNDV). In: Conference on Whitefly and thrips transmitted viruses, to be held at UDSC, New Delhi during August 27-28, 2010. R Vinothkumar, R., Sharma, V, K., Chattopadhyay, B. and Chakraborty, S. An efficient regeneration and transformation method for developing transgenic chilli expressing viral orfs. In: Conference on Whitefly and thrips transmitted viruses, to be held at UDSC, New Delhi during August 27-28, 2010. Ranjan, P., Singh, A.K., Chattopadhyay, B. and Chakraborty, S. Two distinct tomato-infecting begomovirus species from northern India with unique transreplication ability. In: Conference on Whitefly and thrips transmitted viruses, to be held at UDSC, New Delhi during August 27-28, 2010. Singh, A.K. and Chakraborty, S. Roles and interactions of begomoviruses and satellite DNAs associated with radish leaf curl disease in India. In: Conference on Whitefly and thrips transmitted viruses, to be held at UDSC, New Delhi during August 27-28, 2010. Singh, A.K. and Chakraborty, S. Molecular characterization of begomovirus infecting okra in northern India. In: Conference on Whitefly and thrips transmitted viruses, to be held at UDSC, New Delhi during August 27-28, 2010. Kushwaha , N., Sahu, P., Prasad, M., Singh, A.K, Chattopadhyay, B. and Chakraborty, S. Differential expression genes on resistant chilli cultivar in response to chilli leaf curl virus infection. In: Conference on Whitefly and thrips transmitted viruses, to be held at UDSC, New Delhi during August 27-28, 2010. Chakraborty, S., Singh, A.K., Chattopadhyay, B., Kushwaha ,.N., Vinoth Kumar R, Basu, S. Chilli leaf curl disease is caused by interaction among diverse Begomoviruses in India. In: The 6th Solanaceae genome workshop, held at New Delhi during November 8-13, 2009. Prasad,M., Rai, N.K., Reddy, M.K., Ravishankar, K,V., Chakraborty, S., Sahu,P. P,and Sadashiva, A.T. Identification and Molecular mapping Of Tomato Leaf Curl New Delhi Virus(ToLCNDV) resistant Gene(s) in tomato (Solanum lycopersicum L.) In: The 6th Solanaceae genome workshop, held at New Delhi during November 8-13, 2009. Sahu, .P, Rai, N.K, Chakraborty,S., Singh ,M. ,Prasanna ,HC and Prasad ,M. Identication and characterization of differentially expressed genes induced by Tomato Leaf Curl New Delhi Virus (ToLCNDV) infection in tolerant cultivar of tomato (Solanum habrochaitis L.) In: The 6th Solanaceae genome workshop, held at New Delhi during November 8-13, 2009. Chattopadhyay, B., Singh, A.K., Yadav, T, Sarin, N.B. and Chakraborty, S. Chilli leaf curl disease is caused by the co-infection of a Begomovirus and a Beta satellite. In: International Conference on Emerging and Re-emerging Viral Diseases of the Tropics and Sub-Tropics, held at Indian Agricultural Research Institute, New Delhi during December 11-14, 2007. George, B., Akhtar, J., Chattopadhyay, B.,and Chakraborty, S. Expression and purification of replication-initiator (Rep) protein of Tomato leaf curl Gujarat virus. In: International Conference on Emerging and Re-emerging Viral Diseases of the Tropics and Sub-Tropics, held at Indian Agricultural Research Institute, New Delhi during December 11-14, 2007. Kumari, P., Chattopadhyay, B., Singh, A.K. and Chakraborty, S. Biological and Molecular characterization of a Begomovirus isolate associated with Tomato leaf curl disease from Dhanbad. In: International Conference on Emerging and Re-emerging Viral Diseases of the Tropics and Sub-Tropics, held at Indian Agricultural Research Institute, New Delhi during December 11-14, 2007. Chattopadhyay, B., Singh, A. K., Yadav, T., Sarin, N.B., P. K .Hazra, Chakraborty, S. Molecular characterization of begomoviruses infecting chillies in India. In: 5th International Geminivirus symposium, to be held at Ouro Preto, Brazil, during May 20-26, 2007. Singh, A.K., Chattopadhyay, B., Pandey, P. K, and Chakraborty, S. Emergence of a new species of Begomovirus causing leaf curl disease of radish in India. In: 5th International Geminivirus symposium, to be held at Ouro Preto, Brazil, during May 20-26, 2007. Chakraborty, S. and Fauquet, C.M. More virulent asymmetric pseudorecombination and synergism between genomic components of two distinct species of begomoviruses causing severe leaf curl diseases of tomato in India. In: the 4th International Geminivirus Symposium held in Cape town, South Africa, during February16 to 20, 2004. Chakraborty, S., Singh, S.K., Singh, A.K., Pandey, P.K., Rai, M. and Fauquet, C.M. Molecular characterization of begomoviruses causing yellow mosaic disease on cowpea (Vigna unguiculata) and hyacinth bean (Lablab purpureus) . In: the 4th International Geminivirus Symposium held in Cape town, South Africa, during February16 to 20, 2004. Chakraborty, S., Varma, A. and Malathi, V.G. Agroinoculation with wild type and pseudorecombinant DNAs of mungbean yellow mosaic geminivirus isolates in different leguminous hosts. In: the 4th International Geminivirus Symposium, held in Cape town, South Africa, during February16 to 20, 2004. Chakraborty, S., Singh, S.K. and Pandey, P.K. Molecular characterization of cowpea golden mosaic geminivirus. In: International Conference on Vegetables, held at Bangalore, November 11-14, 2002. Singh, S.K., Chakraborty, S. and Pandey, P.K. Molecular cloning of dolichos yellow mosaic geminivirus. In: International Conference on Vegetables, held at Bangalore, November 11-14, 2002. Kumar, R., Banerjee, M.K., Verma, N.K. and Chakraborty, S. Confirmation of resistance against tomato leaf curl virus (TLCV) through grafting in tomato cv. H-24. In: International Conference on Vegetables, held at Bangalore, November 11-14, 2002. Chakraborty, S., P. K. Pandey and G. Kalloo. Molecular cloning of cowpea golden mosaic geminivirus. In: National Symposium on Eco-friendly approaches for Plant Disease Management, held at Chennai, India, January 22 – 24, 2001. Chakraborty, S. and Varma, A. Detection of possible reservoirs of infection of mungbean yellow mosaic geminivirus. In: Symposium on Biotechnology of Plant Protection, to be held at Banaras Hindu University, Varanasi, India, February 25-27, 2000. Chakraborty, S. and Varma, A. Role of temperature on replication and movement of mungbean yellow mosaic geminivirus. In: Symposium on Biotechnology of Plant Protection, to be held at Banaras Hindu University, Varanasi, India, February 25-27, 2000. TOP

Supriya Chakraborty

SUPRIYA CHAKRABORTY
Professor
School of Life Sciences
Jawaharlal Nehru University
New Delhi - 110067, India.
Room No.: 405, 416
Off. Phone: 26704153
E-mail : schakraborty@mail.jnu.ac.in , supriyachakrasls@yahoo.com

Education:

Ph. D. (1993-1997) : Indian Agricultural Research Institute, New Delhi.

Career:

1996 - 2000                 Scientist, Indian Institute of Vegetable Research (IIVR),   Varanasi
2000 - 2004                 Scientist (Sr. Scale), IIVR, Varanasi
2004 – 2010                Associate Professor, School of Life Sciences, JNU.
2010 – present            Professor, School of Life Sciences, JNU.

Area of Research:

Begomoviruses : Molecular biology, host virus interaction, RNAi and transgenic resistance

Research in our laboratory targets interfering with interactions between plant viruses and their hosts, and developing strategies to control begomoviruses in plants. We are currently studying steps of begomovirus pathogenesis especially how they enter into nucleus, replicate, and spread throughout the host. We also aim to identify host genes that respond to infection. Virus replication is regulated by both host-encoded and virus-encoded genes. Similarly, host cells and tissues respond to infection by viruses and either permit or restrict replication and local and long distance spread of infection. We are engaged in studies to determine how successful pathogenesis is established and developing strategies to control infection and to restrict replication and spread of begomoviruses

Begomoviruses (Family – Geminiviridae) are very destructive viruses that can cause devastating diseases in vegetable crops in all tropical regions of the world including India. Their genomes are composed of circular single stranded DNA and they are subjected to gene silencing through an unknown mechanism. We have demonstrated that virulent pseudo-recombination and synergism between two distinct species of begomoviruses, Tomato leaf curl New Delhi virus (ToLCNDV) and Tomato leaf curl Gujarat virus (ToLCGV-Var) that infect tomato, reasons of which are being investigated in our laboratory. RNAi mediated host recovery and role of suppressors of PTGS in modulating symptom expression is also being analyzed in our laboratory. We have developed virus induced gene silencing (VIGS) vector to identify role of plant gene(s) responsible for either facilitating or restricting viral pathogenesis.

We are also assessing molecular diversity among begomoviruses causing leaf curl disease in chillies, tomato, radish and okra. We have identified several distinct new species of begomoviruses causing severe leaf curl diseases on tomato (Tomato leaf curl Gujarat virus & Tomato leaf curl Patna virus) on radish (Radish leaf curl virus) and also on chillies. We discovered a wealth of infectious viral molecules from chilli and we also found that together they do cause a disease; we are now attempting to determine the molecular mechanisms behind this phenomenon. For the first time, we have demonstrated Koch’s postulates using clone DNA molecules associated with chilli leaf curl disease by agroinoculation. Recently, we have initiated to develop strategies for generating broad spectrum resistance against begomoviruses.

Research Projects

Development of transgenic resistance against Bhindi yellow mosaic virus, DBT, 2012-2015.
Engineering broad-spectrum resistance against geminiviruses, DBT, 2011-2014.
Engineering broad-spectrum resistance against plant-infecting RNA viruses, CSIR, 2011-2014.
Engineering RNAi mediated broad-spectrum resistance against chilli begomoviruses, DBT, 2010-2013.
Molecular identification and characterization of virulence factors of Tomato leaf curl virus, DST, 2010-2013.
Molecular diversity of begomoviruses causing chilli leaf curl disease and identification of virulence factors, DBT, 2007-2010.
Strategy for engineering broad-spectrum resistance against geminiviruses, DBT, 2006-2010.
Molecular determinants of supervirulent pseudo-recombinant and asymmetric synergism between genomic components of two distinct begomoviruses causing severe leaf curl disease on tomato in India, International Foundation for Science, Sweden, 2006-2008.
Molecular Characterization of Pepper leaf curl geminivirus and development of DNA based screening technique, DST, 2005-2008.
Development of transgenic cowpea (Vigna unguiculata L.) resistant to cowpea golden mosaic geminivirus, ICAR (2000 - 2003).
Molecular characterization of whitefly transmitted geminiviruses infecting selected leguminous vegetable crops, ICAR Lal Bahadur Shastri young Scientist award project (2001 – 2004).
Detection and differentiation of whitefly transmitted geminiviruses infecting cucurbitaceous vegetable crops, ICAR, 2003-2004.

Awards and Honour

Pran Vohra Award by the Indian Science Congress Association during 2005.
Dr. Harbhajan Singh Award by the Indian Society of Vegetable Science during 2005.
BOYSCAST fellowship by the Department of Science and Technology, Govt. of India, during 2002 for one year Advanced training in Molecular Virology at Danforth Plant Science Center, Saint Louis, Missourie, USA.
Lal Bahadur Shastri Award by the Indian Council of Agricultural Research (ICAR), New Delhi during 2000.
Best Oral paper presentation in the National Symposium on Biotechnology of Plant Protection held at BHU, Varanasi 2000.
Jawahar Lal Nehru Award by the ICAR, New Delhi during1998.
Best student of Indian Agricultural Research Institute (IARI), New Delhi during 1997.
IARI Merit medal during1997.
Best student of Plant Pathology IARI, New Delhi during 1997.
Best student of Plant Pathology of Banaras Hindu University (BHU), Varanasi 1993.
IARI Senior Research Fellowship by the IARI, New Delhi 1993.

Membership

Life member of Indian Science Congress Association.
Life member of Indian Phytopathological Society.
Life member of Indian Virological Society.

Selected Publications

Singh, AK., Chattopadhyay, B. and Chakraborty, S. 2012. Biology and interactions of two distinct monopartite begomoviruses and betasatellites associated with radish leaf curl disease in India. Virology Journal 2012, 9:43.
Vinoth Kumar, R., Singh, A. K. and Chakraborty, S. 2012. A new monopartite begomovirus species, Chilli leaf curl Vellanad virus, and associated betasatellites infecting chilli in the Vellanad region of Kerala, India. New Disease Reports (Plant Pathology) 25, 20. [doi:10.5197/j.2044-0588.2012.025.020].
George, B., Mashhood Alam, Ch., Jain, SK., Sharfuddin, Ch. and Chakraborty, S. 2012. Differential distribution and occurrence of SSRs in diverse geminivirus genomes. Virus Genes (accepted).
Vinothkumar, R., Sharma, V.K., Chattopadhyay, B. and Chakraborty, S. 2012. An improved plant regeneration and Agrobacterium-mediated transformation of red pepper (Capsicum annuum L.). Physiology and Molecular Biology of Plants (accepted).
Kumari, P., Singh AK, Sharma VK, Chattopadhyay B, Chakraborty, S. 2011. A novel recombinant tomato-infecting begomovirus capable of. Archieves of Virology. 156(5):769-83.
Kumari, P., Singh AK, Chattopadhyay B, Chakraborty, S. 2011. A new begomovirus species and betasatellite causing severe tomato leaf curl disease in Ranchi, India. Plant Pathology 23,11 [doi:10.5197/j.2044-0588.2011.023.011].
Kumari, P., Singh AK, Chattopadhyay B, Chakraborty, S. 2010. Molecular characterization of a new species of Begomovirus and betasatellite causing leaf curl disease of tomato in India. Virus Research 152 (2010) 19–29.
Sahu, P.P, Rai, N.K, Chakraborty, S., Singh, M., Prasanna, H.C., Ramesh, B., Chattopadhyay, D. and Prasad, M. 2010. Tomato cultivar tolerant to Tomato leaf curl New Delhi virus infection induces virus-specific short interfering RNA accumulation and defence-associated host gene expression. Molecular Plant Pathology. 11(4): 531-544.
Kushwaha, N, Singh, A.K., Chattopadhyay, B. Chakraborty S. 2010. Recent advances in Geminivirus detection. The Journal of Plant Protection Sciences,(1) : 1-18.
Kumari, P., Chattopadhyay, B., Singh, A.K and Chakraborty, S. 2009. A New Begomovirus Species Causing Tomato Leaf Curl Disease in Patna, India. Plant Disease. 95(5):595
Singh, A. K. Mishra K. K., Chattopadhyay, B. and Chakraborty, S. 2009. Biological and Molecular characterization of a Begomovirus associated with yellow mosaic vein mosaic disease of pumpkin from Northern India. Virus Genes. 39(3):359-70.
Chakraborty S. 2008. Tomato Leaf Curl Viruses from India. Encyclopedia of Virology, 5 vols. (B.W.J. Mahy and M.H.V. Van Regenmortel, Editors), pp. 124-133 Oxford: Elsevier.
Chakraborty, S., Vanitharani, R., Chattopadhyay, B. and Fauquet, C.M. 2008. More virulent recombination and asymmetric synergism between two distinct species of causing tomato leaf curl disease in India. Journal of General Virology, 89 (3), 818–828.
Chattopadhyay, B., Singh, A.K., Yadav, T., Fauquet, C.M., Sarin, N.B. and Chakraborty, S. 2008. Infectivity of the cloned components of a begomovirus: DNA beta causing chilli leaf curl disease in India. Archieves of Virology 153(3):533-539.
Singh AK, Chattopadhyay B, Pandey PK, Singh AK and Chakraborty, S. 2007. First report of a new species of Begomovirus causing leaf curl disease of radish in India. Plant Disease 91 (8), 1053.
Singh SK, Chakraborty S, Singh AK, Pandey PK. 2006. Cloning, restriction mapping and phylogenetic relationship of genomic components of MYMIV from Lablab purpureus. Bioresource Technology 1807-1814.
Chakraborty, S., B Singh and P K Pandey. (2005). An evaluation of the reactions of okra cultivars and breeding Selections to okra leaf curl geminivirus. Annals of Applied Biology (Tests of Agrochemicals and Cultivars) 26: 32-33.
Chakraborty, S., Pandey, P.K., Banerjee, M.K., Kalloo, G. and Fauquet, C.M.(2003).Tomato leaf Gujarat virus, a new begomovirus species causing a severe leaf curl disease of tomato in Varanasi, India. Phytopathology 93 (12): 1485-1496.
Chakraborty, S., Pandey, P.K., Banerjee, M.K., Kalloo, G. and Fauquet, C.M.(2003).A new begomovirus species causing tomato leaf curl disease in Varanasi, India. Plant Disease. 87(3): 313.
Chakraborty, S., Raj Kumar and M. (2003).Identification of resistant sources to cowpea golden mosaic geminivirus. Vegetable Science 30(2): 101-105.
Singh M, Kumar S, Srivastava K, Chakraborty S, Kumar PA, Kalloo G and Banerjee MK.(2003). Transfer of crystal protein gene (Cry1Ab) to brinjal (Solanum melongena L.). Indian J. Plant Physiol. (Spl. Issue) 630-633.
Chattopadhyay, B., B. Rai and Chakraborty, S. (2002). In vitro efficacy of some systemic fungicides against Fusarium oxysporum f. sp. Iycopersici. Annals of Applied Biology(Tests of Agrochemicals and Cultivars), 22:008-009.
Chakraborty, S., Sinha, A. and Pandey, P. K. (2002).Viruses of vegetable crops: biology, detection and management. In: Microbes and Plants (ed. Asha Sinha), Kalyani Publishers, India, p 198-225.
Chakraborty, S. Anupam Varma and V.G. Malathi. (2001). Molecular characterization of mungbean yellow mosaic geminivirus - a novel approach for engineering transgenic resistance. In proceedings of International Conference on Environment and Agriculture, held in Kathmandu, Nepal, Nov. 1-3, 1998, p.376-382.
Singh, M., Chakraborty, S., Srivastava, K. and Kalloo, G. (2000). Biotechnological advances in improvement of vegetable crops. . In : Emerging Scenario in Vegetable Research and Development (Eds. G. Kalloo and Kirti Singh), Research Periodicals and Book Publishing House, India, pp 58-84.
Chakraborty, S., M. Singh, G. Kalloo, M. K. Banerjee and P. K. Pandey. (2000). Screening of cowpea cultivars against cowpea golden mosaic geminivirus. Annals of Applied Biology (Tests of Agrochemicals and Cultivars) 20: 40-41.
Singh, M, Chakraborty, S., A.K. Singh, P.M.Singh and G. Kalloo. (1999). Seed protein electrophoresis for varietal identification of cowpea (Vigna unguiculata). Seed Research29:1-6.
Chakraborty, S., P. K. Pandey and B. Singh. (1997). Okra enation leaf curl disease- a threat to cultivation of okra (Abelmoschus esculentus L). Vegetable Science 24 (1): 52-54.
Chakraborty, S., A. Sinha and P. K. Pandey. (1997). Occurrence of watermelon mosaic virus- I on bottle gourd [Lagenaria siceraria ( Mol. ) Standl ]. Vegetable Science 24(2): 147-149.
Chakraborty, S., A. Sinha and B.V.B. Reddy. (1995). Post infection changes in total nitrogen, total phosphorus and protein contents of cucurbit plants affected by cucumber mosaic virus. Advances in Plant Sciences 8(2): 417-419.
Chakraborty, S. and A. Sinha. (1994). A mosaic disease of pumpkin (Cucurbita moschata in Varanasi region. Crop Research 8(1): 196-198.
Chakraborty, S., A. Sinha and B.V.B. Reddy. (1994). Effect of cucurbit mosaic viruses on chlorophyll and total phenol content of cucurbits. Crop Research7(3): 461-465

Referred Papers in Published Conference Proceedings

Chakraborty, S., Singh, A.K., Chattopadhyay, B., Kushwaha ,.N., Vinoth Kumar R, Basu, S. Synergistic interaction among diverse begomoviruses results in leaf curl disease of chillies in India. In: The 6th International Geminivirus Symposium, held at Guanajuato, Mexico during November 7-12, 2010. (invited lecture)*
Kushwaha, N., Sahu, P. P., Manoj Prasad and Chakraborty, S. Altered Gene Expression Profile of Resistant Chilli Genotype Infected With Chilli Leaf Curl Virus In: The 6th International Geminivirus Symposium, held at Guanajuato, Mexico during November 7-12, 2010.
Sahu, P. P., Chakraborty, S., Singh, M, Chattopadhyay, D and Manoj Prasad Altered Gene Expression Profile of Resistant Chilli Genotype Infected With Chilli Leaf Curl Virus In: The 6th International Geminivirus Symposium, held at Guanajuato, Mexico during November 7-12, 2010.
George, B., Bhardwaj, A., Prabu, G., Alam, C. M. and Chakraborty, S. Characterization of replication initiator protein of Tomato Leaf Curl New Delhi Virus (ToLCNDV). In: Conference on Whitefly and thrips transmitted viruses, to be held at UDSC, New Delhi during August 27-28, 2010.
Basu, S., George, B. and Chakraborty, S. Identification of post transcriptional gene silencing (PTGS) suppressors in Tomato Leaf Curl New Delhi Virus (ToLCNDV). In: Conference on Whitefly and thrips transmitted viruses, to be held at UDSC, New Delhi during August 27-28, 2010.
R Vinothkumar, R., Sharma, V, K., Chattopadhyay, B. and Chakraborty, S. An efficient regeneration and transformation method for developing transgenic chilli expressing viral orfs. In: Conference on Whitefly and thrips transmitted viruses, to be held at UDSC, New Delhi during August 27-28, 2010.
Ranjan, P., Singh, A.K., Chattopadhyay, B. and Chakraborty, S. Two distinct tomato-infecting begomovirus species from northern India with unique transreplication ability. In: Conference on Whitefly and thrips transmitted viruses, to be held at UDSC, New Delhi during August 27-28, 2010.
Singh, A.K. and Chakraborty, S. Roles and interactions of begomoviruses and satellite DNAs associated with radish leaf curl disease in India. In: Conference on Whitefly and thrips transmitted viruses, to be held at UDSC, New Delhi during August 27-28, 2010.
Singh, A.K. and Chakraborty, S. Molecular characterization of begomovirus infecting okra in northern India. In: Conference on Whitefly and thrips transmitted viruses, to be held at UDSC, New Delhi during August 27-28, 2010.
Kushwaha , N., Sahu, P., Prasad, M., Singh, A.K, Chattopadhyay, B. and Chakraborty, S. Differential expression genes on resistant chilli cultivar in response to chilli leaf curl virus infection. In: Conference on Whitefly and thrips transmitted viruses, to be held at UDSC, New Delhi during August 27-28, 2010.
Chakraborty, S., Singh, A.K., Chattopadhyay, B., Kushwaha ,.N., Vinoth Kumar R, Basu, S. Chilli leaf curl disease is caused by interaction among diverse Begomoviruses in India. In: The 6th Solanaceae genome workshop, held at New Delhi during November 8-13, 2009.
Prasad,M., Rai, N.K., Reddy, M.K., Ravishankar, K,V., Chakraborty, S., Sahu,P. P,and Sadashiva, A.T. Identification and Molecular mapping Of Tomato Leaf Curl New Delhi Virus(ToLCNDV) resistant Gene(s) in tomato (Solanum lycopersicum L.) In: The 6th Solanaceae genome workshop, held at New Delhi during November 8-13, 2009.
Sahu, .P, Rai, N.K, Chakraborty,S., Singh ,M. ,Prasanna ,HC and Prasad ,M. Identication and characterization of differentially expressed genes induced by Tomato Leaf Curl New Delhi Virus (ToLCNDV) infection in tolerant cultivar of tomato (Solanum habrochaitis L.) In: The 6th Solanaceae genome workshop, held at New Delhi during November 8-13, 2009.
Chattopadhyay, B., Singh, A.K., Yadav, T, Sarin, N.B. and Chakraborty, S. Chilli leaf curl disease is caused by the co-infection of a Begomovirus and a Beta satellite. In: International Conference on Emerging and Re-emerging Viral Diseases of the Tropics and Sub-Tropics, held at Indian Agricultural Research Institute, New Delhi during December 11-14, 2007.
George, B., Akhtar, J., Chattopadhyay, B.,and Chakraborty, S. Expression and purification of replication-initiator (Rep) protein of Tomato leaf curl Gujarat virus. In: International Conference on Emerging and Re-emerging Viral Diseases of the Tropics and Sub-Tropics, held at Indian Agricultural Research Institute, New Delhi during December 11-14, 2007.
Kumari, P., Chattopadhyay, B., Singh, A.K. and Chakraborty, S. Biological and Molecular characterization of a Begomovirus isolate associated with Tomato leaf curl disease from Dhanbad. In: International Conference on Emerging and Re-emerging Viral Diseases of the Tropics and Sub-Tropics, held at Indian Agricultural Research Institute, New Delhi during December 11-14, 2007.
Chattopadhyay, B., Singh, A. K., Yadav, T., Sarin, N.B., P. K .Hazra, Chakraborty, S. Molecular characterization of begomoviruses infecting chillies in India. In: 5th International Geminivirus symposium, to be held at Ouro Preto, Brazil, during May 20-26, 2007.
Singh, A.K., Chattopadhyay, B., Pandey, P. K, and Chakraborty, S. Emergence of a new species of Begomovirus causing leaf curl disease of radish in India. In: 5th International Geminivirus symposium, to be held at Ouro Preto, Brazil, during May 20-26, 2007.
Chakraborty, S. and Fauquet, C.M. More virulent asymmetric pseudorecombination and synergism between genomic components of two distinct species of begomoviruses causing severe leaf curl diseases of tomato in India. In: the 4th International Geminivirus Symposium held in Cape town, South Africa, during February16 to 20, 2004.
Chakraborty, S., Singh, S.K., Singh, A.K., Pandey, P.K., Rai, M. and Fauquet, C.M. Molecular characterization of begomoviruses causing yellow mosaic disease on cowpea (Vigna unguiculata) and hyacinth bean (Lablab purpureus) . In: the 4th International Geminivirus Symposium held in Cape town, South Africa, during February16 to 20, 2004.
Chakraborty, S., Varma, A. and Malathi, V.G. Agroinoculation with wild type and pseudorecombinant DNAs of mungbean yellow mosaic geminivirus isolates in different leguminous hosts. In: the 4th International Geminivirus Symposium, held in Cape town, South Africa, during February16 to 20, 2004.
Chakraborty, S., Singh, S.K. and Pandey, P.K. Molecular characterization of cowpea golden mosaic geminivirus. In: International Conference on Vegetables, held at Bangalore, November 11-14, 2002.
Singh, S.K., Chakraborty, S. and Pandey, P.K. Molecular cloning of dolichos yellow mosaic geminivirus. In: International Conference on Vegetables, held at Bangalore, November 11-14, 2002.
Kumar, R., Banerjee, M.K., Verma, N.K. and Chakraborty, S. Confirmation of resistance against tomato leaf curl virus (TLCV) through grafting in tomato cv. H-24. In: International Conference on Vegetables, held at Bangalore, November 11-14, 2002.
Chakraborty, S., P. K. Pandey and G. Kalloo. Molecular cloning of cowpea golden mosaic geminivirus. In: National Symposium on Eco-friendly approaches for Plant Disease Management, held at Chennai, India, January 22 – 24, 2001.
Chakraborty, S. and Varma, A. Detection of possible reservoirs of infection of mungbean yellow mosaic geminivirus. In: Symposium on Biotechnology of Plant Protection, to be held at Banaras Hindu University, Varanasi, India, February 25-27, 2000.
Chakraborty, S. and Varma, A. Role of temperature on replication and movement of mungbean yellow mosaic geminivirus. In: Symposium on Biotechnology of Plant Protection, to be held at Banaras Hindu University, Varanasi, India, February 25-27, 2000.

TOP