Faculty

Dr.Anil Kumar Tripathi

Professor
Ph.D. (BHU)
Contact Information:
Tel: +91-542-2368331 Fax:+91-542-2368693
Email Id:tripathianil@rediffmail.com

Academic Qualifications:
 
S. No.DegreeInstitutionYear
1.B.Sc.Banaras Hindu University1978
2.M.Sc.Banaras Hindu University1980
3.Ph. D.Banaras Hindu University1984
 
 
Area of specialization:
 

Azospirillum brasilense is a plant growth promoting rhizobacterium which colonizes a large number of agronomically important grasses and promotes their growth through phytohormone production and nitrogen fixation. The genome of A. brasilense encodes 23 sigma factors including 10 extra-cytoplasmic function (RpoE) sigma factors and 5 RpoH sigma factors. In order to understand the role of each of these sigma factors in its physiology, we are knocking out each gene encoding alternative sigma factor and trying to characterize their phenotype and identify members of their regulon using proteomic and transcriptomic approaches. We have shown that oxidative and photo-oxidative stress in A. brasilense is regulated by a network of multiple cascades of RpoE and RpoH sigma factors. We are also investigating the role of genes involved in the transport of dicarboxylates, glucose and ethanol, and their regulation by alternative sigma factors. We have determined whole genome sequence of the four Indian isolates of A. brasilense to identify their unique features vis a vis their South American cousins. Currently, we are also focusing our attention on the role of six Iron starvation sigma factors (FecI) in siderophore mediated Iron nutrition. We are using our understanding of the systems biology of A. brasilense to produce high value phytochemicals (amorphadiene, geraniol etc) in A. brasilense using synthetic biology approach.

Awards:
  • Fellow, Indian National Science Academy (INSA), New Delhi (2015)
  • NASI Lecture Award in the Field of Biodiversity (2017) (NASI, Allahabad)
  • Dr B. D. Tilak Memorial Lecture Award (2017) (INSA, New Delhi)
  • Prof R. N. Tandon Memorial Lecture Award (2016) (NASI, Allahabad)
  • Prof P. Maheshwari Memorial Lecture Award, University of Delhi (2016)
  • Vice Chancellor's Award for Excellence in Research, BHU for publication in high impact scientific Journal (2014)
  • CSIR Technology Award in Life Science (2016)
  • CSIR Technology Award for S & T Innovation for Rural Development (2014)
  • Fellow, National Academy of Sciences India (NASI), Allahabad (2012)
  • Fellow, National Academy of Agricultural Sciences (NAAS), New Delhi (2009)
  • Fellow, Association of Microbiologists of India (AMI), New Delhi (2006)
  • Fellow, Biotech Research Society of India (BRSI), Trivandrum (2005)
  • UGC Career Award in Biotechnology (1994-97)
  • DBT Overseas Associateship (Short term) of Department of Biotechnology, Govt. of India to visit University of California at San Francisco for 4 months (2006).
  • INSA visiting scientist at Institute of Molecular Biology, SAS, Bratislava under bilateral exchange program with Slovak Academy of Sciences, (2009).
  • DAAD (German Academic Exchange Service) fellowship in Biotechnology, 1987 ISCA Young Scientist Award, Indian Science Congress, Bangalore, 1987
 
Projects Undertaken as PI/ Co PI:
 

  1. 1.German Agency for Technical Cooperation (GTZ), Eschborn (1991-1992)
  2. 2. International Foundation for Science (IFS), Stockholm (1992-1995)
  3. 3. German Ministry for Research & Technology (BMFT), Bonn (1998-1999)
  4. 4. Indo-French Centre (IFCPAR/CEFIPRA), New Delhi (1999-2002)
  5. 5. International Rice Research Instiute, Manila (1999-2002)
  6. National Agencies:
  7. 6. Department of Science & Technology, New Delhi (1992-1996)
  8. 7. Board of Research in Nuclear Sciences, Mumbai (1992-1995)
  9. 8. University Grants Commission, New Delhi (1994-1997)
  10. 9. Min. of Environ & Forests (MoEnF), New Delhi (1999-2011)
  11. 10. Department of Biotechnology (DBT), New Delhi (2006- 2010)
  12. 11. Council of Science & Industrial Research, New Delhi (2007-2011)
  13. 12. Department of Biotechnology (DBT), New Delhi (2008-2011)
  14. 13. Department of Science & Technology (DST) New Delhi (2010- 2013)
  15. 14. Department of Biotechnology (DBT), New Delhi (2010- 2013)
  16. 15. Department of Biotechnology (DBT), New Delhi (2011-2014)
  17. 16. Indian Council of Agricultural Research, New Delhi (2014-2017)
 
Any additional information:
 
  • Member, Empowered Committee, SERB (2018- )
  • Member, Council, The National Academy of Sciences (NASI), India (2018-)
  • Member, INSA Sectional Committee IX: Microbiology & Immunology (2016-2019)
  • Member, CSIR Governing Body and CSIR Society (2016)
  • Convener, INSA Chapter, Lucknow (2015 onwards)
  • Member, SERB Empowered Committee (2018 onwards)
  • Member, SERB-FIST Subject Expert Committee on Life Sciences (2016-2020)
  • Member, Advisory Committee for Shanti Swarup Bhatnagar Prize for Science & Technology in Biological Science (2016)
  • Member, DBT Task Force on Environmental Biotechnology & Biodiversity Conservation (2013-2017)
  • Leader of CSIR Delegation to National Institute of Medicinal Materials, Hanoi, Vietnam (2016)
  • Chairman, Ad Hoc committee constituted by Regional Centre for Science and Technology Transfer (RCSTT), Indian Ocean Rim Association on Standards and Standardization for Medicinal Plants and Herbal Medicine June 2014
  • Chairman, Advisory Committee for Biotechnology, Council of Science & Technology, U. P. (2015-)
  • Member, Science Advisory Committee, ICMR-National Institute of Traditional Medicine, Belagavi (2018-)
  • Member, Research Council, NBRI, Lucknow (2015-17)
  • Member, Research Council, Central Drugs Research Institute, (2014-)
  • Member, Management Council, Indian Institute of Toxicological Research (2014)
  • Member, Management Council, NBRI, Lucknow (2018-)
  • Member, Research Council, Agharkar Research Institute (DST), Pune (2017- )
  • Member, Research Council, National Institute of Interdisciplinary Science & Technology (CSIR-NIIST), Thiruvanantpuram (2017- )
  • Member, General Body, Council of Science & Technology, U. P. (2016-2019)
  • Member, Court, Jawaharlal Nehru University, New Delhi
  • Member, Academic Council, Jawaharlal Nehru University, New Delhi (2015-)
  • President, CSIR Sports Promotion Board (2015-2017)
  • Outstanding Professor of Biological Sciences, Academy of Scientific and Innovative Research, New Delhi (2014 onwards)
  • Member Senate, Academy of Scientific and Innovative Research, Delhi (2014-17)
  • Member, Advisory-cum-Monitoring Committee, Biotech Park, Lucknow (2014 onwards)
  • Member, National Research Advisory Committee, National Innovation Foundation, Ahmedabad (2014 onwards)
  • Member, Board of Governors, Biotech Research Society, India (2013-2015)
  • Member, International Scientific Committee, International Symposia on Nitrogen Fixation with Non-legumes, Mexico (2005) and Munich (2012)
  • Member, Executive Committee, Indian Society of Cell Biology (2011-2013)
  • Member, Editorial Board, Indian Journal of Microbiology (2006)
  • Member, National Science Digital Library working group in Microbiology, NISCAIR, CSIR, New Delhi (2005)
  • Member, Advisory Board, Indo-Russian Center for Biotechnology, Indian Institute of Information Technology, Allahabad (2003 onwards)
  • Member, Working Group on Micro organisms Diversity, National Biodiversity Strategy and Action Plan, Ministry of Environment and Forests, New Delhi (2002)
  • Chairman, Board of Studies in Biotechnology, Rajiv Gandhi Technical University, Bhopal
  • Member, School Board of Life Sciences. North Eastern Hill University, Shillong
  • Member, Board of Studies in Biotechnology, BHU
  • Member, Board of Studies in Molecular & Human Genetics, BHU
  • Member, Board of Studies in Biotechnology, Allahabad University
  • Convener, Board of Studies in Biotechnology, D. D. U. Gorakhpur University
  • Chairman: Guest House Complex Advisory Committee, BHU (2009- 2010)
  • Convener, DST-PURSE Implementation committee, Faculty of Science, BHU (2009-2010)
  • Member, Task Force for Fostering Excellence in Research, BHU (2009-contd)
  • Convener, Website Committee, Faculty of Science, BHU (2010)
  • Chairperson, Committee for promoting/Fostering Innovation in BHU (2010)
  • Member, Alumni Cell, BHU (2012)
  • Administrative Experience:
  • Director, CSIR-CIMAP (since February 2014
  • Mission Director, CSIR Aroma Mission (May2016....)
  • Coordinator, DBT-BHU Interdisciplinary School of Life Sciences, BHU (2013-2014)
  • Professor & Head, Department of Biotechnology, D. D. U. Gorakhpur Univerity, Gorakhpur (July 2002-Jun 2004)
  • Coordinator, School of Biotechnology, Banaras Hindu University (May 2007- May 2010)
  • Coordinator, Centre for Bioinformatics, Banaras Hindu University (March 2008-Contd.)
  • Chairman: Guest House Complex Advisory Committee, BHU (2009- 2010)
  • Convener, DST-PURSE Implementation committee, Faculty of Science, BHU (2009-2010)
  • Member, Task Force for Fostering Excellence in Research, BHU (2009-contd)
  • Group Leader, Research Group on Functional Genomics, DBT-BHU Interdisciplinary School of Life Sciences, BHU (2009- contd)
  • Convener, Website Committee, Faculty of Science, BHU (2010)
  • Chairperson, Committee for promoting/Fostering Innovation in the University, BHU
  • Member, Alumni Cell, BHU (2012)

List of ten major publications:
  1. 1. Rai, A.K., Singh, S., Dwivedi, S.K., Srivastava, A., Pandey, P., Kumar S., Singh, B. N. and Tripathi A. K. (2018) Expression of catalases in Azospirillum brasilense Sp7 is regulated by a network of OxyR and two RpoH paralogs including a regulatory cascade of RpoE1 and RpoH5. Applied Environmental Microbiology (ASM) doi: 10.1128/AEM.01787-18
  2. 2. Singh, V. S., Dubey, A. P., Gupta, A., Singh1,S., Singh, B. N. and Tripathi, A. K. (2017) Regulation of a glycerol induced quinoprotein alcohol dehydrogenase by s54 and a LuxR-type regulator in Azospirillum brasilense Sp7 Journal of Bacteriology (ASM) doi:10.1128/JB.00035-17
  3. 3. Srivastava, A., Brilisauer, K., Rai, A. K., Ballal, A., Forchhammer, K. and Tripathi, A. K. (2016) Downregulation of the alternative sigma factor SigJ confers a photoprotective phenotype to Anabaena PCC 7120. Plant and Cell Physiology (JSPP) 58: 287-297
  4. 4. Rai, A.K., Dubey, A.P.,Kumar, S., Mishra, M. N., Dutta, D., Singh, B.N. and Tripathi, A. K. (2016) Carotenoid biosynthetic pathways are regulated by a network of multiple cascades of alternative sigma factors in Azospirillum brasilense Sp7. Journal of Bacteriology (ASM) 198:2955-2964
  5. 5. Singh, D. N, Gupta, A., Singh, V.S., Mishra, R., Kateriya, S., Tripathi, A. K. (2015) Identification and characterization of a novel phosphodiesterase from the metagenome of an Indian coalbed. PLoS ONE 10(2): e0118075. doi:10.1371/journal.pone.0118075
  6. 6. Gupta, N., Gupta,A., Kumar,S., Mishra,R., Singh, C. and Tripathi, A. K. (2014) Cross-talk between cognate and non-cognate RpoE sigma factors and Zn2+-binding anti-sigma factors regulates photooxidative stress response in Azospirillum brasilense Anti-oxidants and Redox Signalling 20:42-59
  7. 7. Gehlot, H.S., Tak, N., Kaushik, M., Mitra, S., Chen, W-B, Poweleit, N., Panwar, D., Poonar, N., Parihar, R., Tak, A., Sankhla, I.S., Ojha, A., Rama Rao, S., Simon, M.F., Reis Junior, F.B.D., Perigolo, N., Tripathi, A.K., Sprent, J.I., Young, J.P.W., James, E.K. and Gyaneshwar, P. (2013) An invasive Mimosa in India does not adopt the symbionts of its native relatives. Annals of Botany 112: 179-196
  8. 8. Kumar, S., Kateriya, S., Singh, V. S., Tanwar, M., Agarwal, M., Singh, H., Khurana, J. P., Amla, D. V. and Tripathi, A. K. (2012) Bacteriophytochrome controls carotenoid-indepedent response to photodynamic stress in a non-photosynthetic rhizobacterium, Azospirillum brasilense Sp7. Scientific Reports (Nature Publishing Group) 2, doi:10.1038/srep00872
  9. 9. Kumar, S., Rai, A. K., Mishra, M.N., Shukla, M., Singh, P. K. and Tripathi, A. K. (2012) RpoH2 sigma factor controls the photooxidative stress response in a non-photosynthetic rhizobacterium, Azospirillum brasilense Sp7. Microbiology (SGM) 158:2891-2902
  10. 10. Verma, S. C., Ladha, J. K. and Tripathi, A. K. (2001) Evaluation of plant growth promoting and colonization ability of endophytic diazotrophs from deep water rice. Journal of Biotechnology 91: 127-141

A. Full length research papers:
  1. Rai, A.K., Singh, S., Dwivedi, S.K., Srivastava, A., Pandey, P., Kumar S., Singh, B. N. and Tripathi A. K. (2018) Expression of catalases in Azospirillum brasilense Sp7 is regulated by a network of OxyR and two RpoH paralogs including a regulatory cascade of RpoE1 and RpoH5. Applied Environmental Microbiology (ASM) doi: 10.1128/AEM.01787-18
  2. Singh, V. S., Dubey, A. P., Gupta, A., Singh1,S., Singh, B. N. and Tripathi, A. K. (2017) Regulation of a glycerol induced quinoprotein alcohol dehydrogenase by s54 and a LuxR-type regulator in Azospirillum brasilense Sp7 Journal of Bacteriology (ASM) doi:10.1128/JB.00035-17
  3. Srivastava, A., Brilisauer, K., Rai, A. K., Ballal, A., Forchhammer, K. and Tripathi, A. K. (2016) Downregulation of the alternative sigma factor SigJ confers a photoprotective phenotype to Anabaena PCC 7120. Plant and Cell Physiology (JSPP) 58: 287-297
  4. Singh, S., Dwivedi, S., Singh, V.S., and Tripathi A.K. (2016) Expression of alkylhydroperoxide reductase is regulated negatively by OxyR1 and positively by RpoE2 sigma factor in Azospirillum brasilense Sp7. Microbiology (SGM) 162:1870-1883
  5. Rai, A.K., Dubey, A.P.,Kumar, S., Mishra, M. N., Dutta, D., Singh, B.N. and Tripathi, A. K. (2016) Carotenoid biosynthetic pathways are regulated by a network of multiple cascades of alternative sigma factors in Azospirillum brasilense Sp7. Journal of Bacteriology (ASM) 198:2955-2964
  6. Singh, D. N, Gupta, A., Singh, V.S., Mishra, R., Kateriya, S., Tripathi, A. K. (2015) Identification and characterization of a novel phosphodiesterase from the metagenome of an Indian coalbed. PLoS ONE 10(2): e0118075. doi:10.1371/journal.pone.0118075
  7. Rastogi, S., Kalra, A., Gupta, V., Khan, F., Lal, R. K., Tripathi, A. K., Parameswaran, S., Gopalakrishnan. C., Ramaswamy, G., Shasany, A. K. (2015) Unravelling the genome of Holy basil: an "incomparable" "elixir of life" of traditional Indian medicine. BMC Genomics. 16:413. doi: 10.1186/s12864-015-1640-z.
  8. Singh, S., Singh, C. and Tripathi, A. K. (2014) A SAM-dependent methyltransferase cotranscribed with arsenate reductase alters resistance to peptidyl transferase center-binding antibiotics in Azospirillum brasilense Sp7. Applied Microbiology & Biotechnology 98: 4625-4636
  9. Gupta, N., Gupta,A., Kumar,S., Mishra,R., Singh, C. and Tripathi, A. K. (2014) Cross-talk between cognate and non-cognate RpoE sigma factors and Zn2+-binding anti-sigma factors regulates photooxidative stress response in Azospirillum brasilense Anti-oxidants and Redox Signalling 20:42-59
  10. Gehlot, H.S., Tak, N., Kaushik, M., Mitra, S., Chen, W-B, Poweleit, N., Panwar, D., Poonar, N., Parihar, R., Tak, A., Sankhla, I.S., Ojha, A., Rama Rao, S., Simon, M.F., Reis Junior, F.B.D., Perigolo, N., Tripathi, A.K., Sprent, J.I., Young, J.P.W., James, E.K. and Gyaneshwar, P. (2013) An invasive Mimosa in India does not adopt the symbionts of its native relatives. Annals of Botany 112: 179-196
  11. Singh, D. N. and Tripathi, A. K (2013) Coal induced production of a rhamnolipid biosurfactant by Pseudomonas stutzeri, isolated from the formation water of Jharia coalbed. Bioresource Technology 128:215-221
  12. Gupta,N., Kumar, S., Mishra, M. N. and Tripathi, A. K. (2013) A constitutively expressed pair of rpoE2-chrR2 in Azospirillum brasilense Sp7 is required for survival under antibiotic and oxidative stress. Microbiology (SGM)159:205-218
  13. Kumar, S., Kateriya, S., Singh, V. S., Tanwar, M., Agarwal, M., Singh, H., Khurana, J. P., Amla, D. V. and Tripathi, A. K. (2012) Bacteriophytochrome controls carotenoid-indepedent response to photodynamic stress in a non-photosynthetic rhizobacterium, Azospirillum brasilense Sp7. Scientific Reports (Nature Publishing Group) 2, doi:10.1038/srep00872
  14. Kumar, S., Rai, A. K., Mishra, M.N., Shukla, M., Singh, P. K. and Tripathi, A. K. (2012) RpoH2 sigma factor controls the photooxidative stress response in a non-photosynthetic rhizobacterium, Azospirillum brasilense Sp7. Microbiology (SGM) 158:2891-2902
  15. Singh, D. N., Kumar, A., Sarbhai, M. P. and Tripathi, A. K (2012) Cultivation independent analysis of archaeal and bacterial communities of the formation water in an Indian coal bed to enhance biotransformation of coal into methane. Applied Microbiology & Biotechnology 93:13371350
  16. Singh, D. N. and Tripathi, A. K. (2011) Evaluation of the coal-degrading ability of Rhizobium and Chelatococcus strains isolated from the formation of an Indian coal bed. Journal of Microbiology & Biotechnology 21:1101-1108
  17. Mishra, M. N., Kumar, S., Gupta, N., Kaur, S., Gupta, A. and Tripathi, A. K. (2011) The extra-cytoplasmic function sigma factor (RpoE) cotranscribed with its cognate anti-sigma factor confers tolerance to NaCl, ethanol and methylene blue in Azospirillum brasilense Sp7. Microbiology (SGM) 157: 988 - 999
  18. Kaur, S, Mishra M.N. and Tripathi, A. K. (2010) Gene encoding ?-carbonic anhydrase is cotranscribed with argC and induced in response to stationary phase and high CO2 in Azospirillum brasilense Sp7. BMC Microbiology 10:184
  19. Ghosh M, Ganguli A, Tripathi AK. (2009) Decolorization of anaerobically digested molasses spent wash by Pseudomonas putida. Applied Biochemistry & Microbiology 45:78-83
  20. Kaur, S, Mishra M.N. and Tripathi, A. K. (2009) Regulation of expression and biochemical characterization of a -class carbonic anhydrase from the plant growth-promoting rhizobacterium, Azospirillum brasilense Sp7. FEMS Microbiology Letters 299:149-158
  21. Shukla, A. K., Vishwakarma, P., Upadhyay, S. N., Tripathi, A. K., Prasana, H. C. and Dubey, S. K. (2009) Biodegradation of trichloroethylene (TCE) by methanotrophic community. Bioresource Technology 100: 2469-2474 (IF: 4.453)
  22. Rishiram R., Krishnamurthi K., Saravana Devi S., Mudliar, S., Kaur, S., Tripathi, A. K. and Chakrabarti, T. (2009) Bio-sequestration of carbon dioxide using carbonic anhydrase enzyme purified from Citrobacter freundii World Journal of Microbiology & Biotechnology 25:981-987
  23. Paul Chowdhury, S., Schmid, S., Hartmann, A. and Tripathi, A.K. (2009) Diversity of 16S-rRNA and nifH genes derived from rhizosphere soil and roots of an endemic drought tolerant grass, Lasiurus sindicus. European Journal of Soil Biology 45:114-122
  24. Nagarajan, T., Mishra, M. N., Spaepen, S., Vanderleyden, J., Gross, C.A. and Tripathi, A.K. (2008) An extra cytoplasmic function sigma factor and anti-sigma factor control carotenoid biosynthesis in Azospirillum brasilense. Microbiology 154: 2096-2105 (IF:3.14)
  25. Mishra, M. N., Nagarajan, T., Sharma, I.M., Jagannadham, M. V. and Tripathi, A.K. (2008) Mutation in a gene encoding anti-sigma factor in Azospirillum brasilense confers tolerance to elevated temperature, anti-bacterial peptide and PEG-200 via carotenoid synthesis. FEMS Microbiology Letters, 287:221-229. (IF: 2.274)
  26. Paul Chowdhury, S., Schmid, S., Hartmann, A. and Tripathi, A.K. (2007) Identification of diazotrophs in the culturable bacterial community associated with roots of Lasiurus sindicus, a perennial grass of Thar Desert, India. Microbial Ecology 54: 82-90 (IF: 2.558)
  27. Paul Chowdhury, S., Nagarajan, T., Tripathi, Rachna., Mishra, Muktinath., Le Rudulier, D. and Tripathi, A. K. (2007) Strain specific salt tolerance and osmoregulatory mechanisms in Azospirillum brasilense. FEMS Microbiology Letters 267:72-79 (IF: 2.274)
  28. Nagarajan, T., Vanderleyden, J. and Tripathi, A.K. (2007) Identification of salt stress inducible genes that control cell envelope related functions in Azospirillum brasilense Sp7. Molecular Genetics & Genomics 278: 43-51 (IF: 2.978)
  29. Alahari, A., Tripathi, A.K. and Le Rudulier, D. (2006) Cloning and characterization of a fur homolog from Azospirillum brasilense Sp7. Current Microbiology 52:123-127
  30. Tripathi, A.K., Verma, S. C., Chowdhury, S.P., Lebuhn, M., Gattinger, A. and Schloter, M. (2006) Ochrobactrum oryzae sp. nov., a novel endophytic bacterial species isolated from deep-water rice in India, International Journal of Systematic & Evolutionary Microbiology 56:1677-1680 (IF:2.66) 24 citations (Google Scholar)
  31. Srivastava, A. and Tripathi A. K. (2006) ADP ribosylation of dinitrogenase reductase and adenylylation of glutamine synthetase control ammonia excretion in ethylene diamine resistant mutants of Azospirillum brasilense Sp7. Current Microbiology 53:317-323
  32. Verma, S.C., Paulchowdhury, S. and Tripathi, A.K. (2004) Phylogeny based on 16S rDNA and nifH sequences of Ralstonia taiwanensis strains isolated from nitrogen fixing nodules of Mimosa pudica in India. Canadian Journal of Microbiology 50:312-322
  33. Verma, S.C., Singh, A., PaulChowdhury, S. and Tripathi, A.K. (2004) Endophytic colonization ability of two deep water rice endophytes, Pantoea agglomerans and Ochrobactrum sp using GFP reporter. Biotechnology Letters 26:425-429 28 citations (Google Scholar)
  34. Ghosh, M., Verma, S.C., Mengoni. A. and Tripathi, A.K. (2004) Enrichment and identification of bacteria capable of reducing chemical oxygen demand of anaerobically treated molasses spent wash. Journal of Applied Microbiology 96: 1278-1286 (IF: 2.5)
  35. Paul Chowdhury, S., Khanna, S., Verma, S.C. and Tripathi, A.K. (2004) Molecular diversity of tannic acid degrading bacteria isolated from tannery soil. Journal of Applied Microbiology 97: 1210-1219 (IF: 2.5)
  36. Ghosh, M., Ganguli, A. and Tripathi, A. K. (2002) Treatment of anaerobically digested distillery spentwash by a two stage bioreactor using Pseudomonas putida and Aeromonas sp. Process Biochemistry 37: 857-862 (IF: 2.336)
  37. Ganguli, A. and Tripathi, A. K. (2002) Bioremediation of toxic chromium from electroplating effluent by chromate reducing Pseudomonas aeruginosa A2chr in two bioreactors. Applied Microbiology and Biotechnology 58: 416-420 (IF: 2.475) 88 citations (Google Scholar)
  38. Tripathi, A. K., Nagarajan, T., Verma, S. C. and Le Rudulier, D. (2002) Inhibition of biosynthesis and activity of nitrogenase in Azospirillum brasilense Sp7 under salinity stress. Current Microbiology 44:363-367
  39. Tripathi, A. K., Verma, S. C., Ron, E. Z. and Tripathi, P. (2002) Molecular characterization of a salt-tolerant bacterial community in the rice rhizosphere Research in Microbiology 153:579-584 (IF: 2.219) 20 citations (Google Scholar)
  40. Ganguli, A. and Tripathi, A. K. (2001) Inducible periplasmic chromate reducing activity in Pseudomonas aeruginosa. Journal of Microbiology & Biotechnology 11:355-361 (IF: 2.062)
  41. Verma, S. C., Ladha, J. K. and Tripathi, A. K. (2001) Evaluation of plant growth promoting and colonization ability of endophytic diazotrophs from deep water rice. Journal of Biotechnology 91: 127-141 (IF: 2.565) 93 citations (Google Scholar)
  42. Tikoo, A., Verma, S.C., Tripathi, A. K. and Nath, G. (2001) PCR fingerprinting of some Indian isolates of Salmonella typhi. Current Science 80: 1049-1052
  43. Khare, S. and Tripathi, A. K. (2001) Reduced accumulation of chromium confers chromate tolerance in Pseudomonas aeruginosa isolated from tannery effluent. Indian Journal of Microbiology. 41: 303-305
  44. Ganguli, A. and Tripathi, A. K. (1999) Survival and Chromate reducing ability of Pseudomonas aeruginosa in tannery effluent. Letters in Applied Microbiology 28: 76-80.
  45. Tripathi, A. K. and Mishra B.M. (1998) Identification and cloning of a Azospirillum lipoferum locus that complements Escherichia coli proU mutant. FEMS Microbiology Letters.162:241-247(IF:2.274)
  46. Tripathi, A. K., Ganguli, A, Tripathi, R. and Bazzicalupo, M. (1998) Duplication of IS50 and its elimination by homologous recombination in Azospirillum brasilense. Canadian Journal of Microbiology.44:1110-1113
  47. Tripathi, A. K., Mishra, B. M. and Tripathi, P. (1998) Salinity stress responses in the plant growth promoting rhizobacteria, Azospirillum spp. Journal of Biosciences 23: 463-471.
  48. Khare, S., Ganguli, A. and Tripathi, A. K. (1997) Responses of Pseudomonas aeruginosa to chromium stress. European Journal of Soil Biology 33:153-158
  49. Tripathi, A. K. and Mishra, B. M. (1996) Isolation and characterization of Azospirillum lipoferum locus that complements dctA mutant of Rhizobium meliloti. Canadian Journal of Microbiology 42: 503-506.
  50. Chatterjee, S., Asthana, R. K., Tripathi, A. K. and Singh, S. P. (1995) Metal removal by selected sorbents. Process Biochemistry 31; 457-462. (IF: 2.336)
  51. Tripathi, A. K. (1995) Genomic characterization of Azospirillum halopraeferens. Indian Journal of Experimental Biology, 33: 249-252.
  52. Tripathi A. K., (1993) Evidence for the existence of fixJ and fixK - like genes in Azospirillum brasilense. Indian Journal of Experimental Biology 31: 559-561.
  53. Tripathi, A. K. and Klingmueller, W. (1992) Temperature sensitivity of nitrogen fixation in Azospirillum spp. Canadian Journal of Microbiology 38: 1238-1241.
  54. Singh, D.V., Tripathi, A. K. and Kumar, H. D. (1991) Isolation and characterization of salinity resistant mutant of a nitrogen fixing cynobacterium, Anabaena doliolum. Journal of Applied Bacteriology 71: 207-210. (IF: 2.5)
  55. Tripathi, A. K., Kreutzer, R. and Klingmueller, W. (1991) Identification of a promoter dependent on nifA and ? 54 upstream of nifH in Azospirillum lioferum. Molecular and General Genetics, 227: 86-90. (IF: 2.978)
  56. Singh, M., Tripathi, A. K. and Klingmueller, W. (1989) Identification of a regulatory nifA type gene and physical mapping of cloned new nif regions of Azospirillum brasilense. Molecular and General Genetics, 219: 235-240. (IF: 2.978)
  57. Tripathi, A. K., Singh, D.V. and Kumar, H.D. (1987) Isolation of mutants of Nostoc linckia resistant to DL-5-fluorotryptophan. Microbios Letter 36: 121-127.
  58. Tripathi, A. K. and Kumar, H. D. (1986) Mutagenesis by ethidium bromide, proflavine and mitomycin C in cyanobacterium Nostoc sp. Mutation Research 174: 175-178. (IF: 4.159)
  59. Singh, D.V., Tripathi, A. K. and Kumar H.D. (1986) Is tryptophan a repressor of heterocyst differentiation and nitrogenase activity in the cynobacterium Anabaena doliolum Annales des Sciences Naturelles Botanique 8: 29-33.
  60. Tripathi, A. K. and Kumar, H. D. (1985) Transformation in the cyanobacterium Nostoc. Biologisches Zentralblatt. 104: 239-243.
  61. Kumar, H. D. and Tripathi, A. K. (1985) Isolation of a hydroxyproline secreting pigment mutant of Nostoc.sp. by metronidazole selection. MIRCEN Journal of Applied Microbiology & Biotechnology 1:269-275.
  62. Kumar, H. D. and Tripathi, A. K. (1985) Mutagenic and plasmid eliminating action of acridine orange in the cyanobacterium Nostoc. Current Science. 54: 845-852.
  63. Kumar, H. D., Mishra, D. K. and Tripathi, A. K. (1983) Isolation and characterization of a propionate resistant mutant of the cyanobacterium Nostoc linckia. Plant & Nature. 1:1-9.
    B. Short research papers:
  64. Johri, B.N., Ganguly, B.N., Goel, S.K., Virdi, J.S., Tripathi, A.K., Jain, R.K., Kamra, D.N, and Bhatnagar, A. (2005) Microorganism diversity: Strategy and action plan. Current Science 89: 151-154
  65. Tripathi, A. K. (2002) Rhizobia of the b-subclass of proteobacteria: A tale of losing the race. Current Science 82: 8-9.
  66. Nath, G. Tikoo, A., Manocha, S., Tripathi, A. K. and Gulati, A. K. (2000) Drug resistance in Salmonella typhi in North India with special reference to ciprofloxacin. Journal of Antimicrobial Chemotherapy. 46: 149-150 (IF: 4.038)
  67. Tripathi, A. K. (1995) Cloning wild-type chromosomal genes using transposon mutagenized DNA in Gram Negative bacteria. Trends in Genetics. 11:340. (IF: 9.729)
    C. Scientific reviews:
  68. Dubey, S.K., Tripathi, A.K. and Upadhyay, S.N. (2006) Exploration of soil bacterial communities for exploring their potential as bioresource. Bioresource Technology 97:2217-2224
  69. Tilak, K.V.B.R., Ranganayaki, N., Pal, K.K., De, R., Saxena, A.K., Nautiyal, C.S., Mittal, S., Tripathi, A.K., Johri, B.N. (2005) Diversity of plant growth and soil health supporting bacteria. Current Science 89:136-150
  70. Tripathi, A. K. and Kumar, H. D. (1991) The organization and regulation of nif genes in non- symbiotic nitrogen fixing bacteria. Journal of Scientific Research, BHU, 41A; 1-20.
    D. Chapters contributed to books:
  71. Kaur, S., Bhattacharya, A., Sharma, A. and Tripathi, A. K. (2011) Diversity of microbial carbonic anhydrases, their physiological role and applications. Microorganisms in Environmental Management and Biotechnology (Eds. T. Satyanarayana, B. N. Johri, & A. Prakash) Springer International
  72. Tripathi, A.K., PaulChowdhury, S. and Parashar, V. (2007) Biological Nitrogen Fixation: From Fundamentals to Field consideration (Eds. Y. P. Abrol, N. Raghuram & M. S. Sachdev) Tripathi, A. K. (2004) Production, formulation, application and quality control of biofertilizers. In Concise Encyclopedia of Bioresource Technology (ed.) A. Pandey. Haworth Press, USA 483-493
  73. Tripathi, A. K. and Singh, B. D. (2004) Assessment and reduction of risks associated with genetically engineered microorganisms. Recent Advances in Biotechnology (Ed. M.P. Singh and N. C. Gautam) Shree Publishers & Distributors, Delhi, 147-162
  74. Barraquio, W. L. Segubre, E. M., Gonzalez, M. S., Verma, S. C., James, E. K., Ladha, J. K. and Tripathi, A. K. (2000) Diazotrophic enterobacteria: What is their role in the rhizosphere? In (Eds. J. K. Ladha and P. M. Reddy) The Quest for Nitrogen Fixation in Rice. IRRI, Manila pp. 93-118.
  75. Verma, S. C., Ladha, J. K. and Tripathi, A. K. (2000) Diversity of endophytic diazotrophs and mechanism of endophytic colonization in deep water rice. In (Eds. F. O. Pedrosa, M. Hungria, M.G. Yates and W. E. Newton) Nitrogen Fixation: From molecules to crop productivity. Kluwer Acad. Publish. pp. 419-420.
  76. Tripathi, A. K. and Mishra, B. M. (1998) Responses of Azospirillum brasilense cd to sodium chloride stress. In Nitrogen Fixation with Non-Legumes (eds. Malik, K.A., Mirza, S.A. and Ladha, J.K.) Kluwer Acad. Publ. pp 179-185
  77. Tripathi, A. K., Mishra, B. M. and Schloter, M. (1995) Role of choline and glycine betaine in Azospirillum brasilense Cd under salinity stress. In Fendrik, I., Del Gallo, M. and Vanderleyden, J. (eds) NATO-ASI Series, Vol.G37, Azospirillum IV and Related Microorganisms pp 383-391.
  78. Tripathi, A. K. (1995) Regulation of the expression of nitrogen fixation genes in Azospirillum brasilense. In B. Sharma et.al. (eds) Genetic Research and Education: Current Trends and the Next Fifty Years. Ind. Soc. Plant Breed. & Genetics, New Delhi.
  79. Tripathi, A. K., Khare S. and Ganguli, A. (1994) Isolation and characterization of Pseudomonas strains for detoxifying chromium in the tannery effluent. Symposium - cum - Workshop on Environmental Biotechnology, NEERI, Nagpur pp. 149-157.
  80. Tripathi, A. K., Singh, M. and Klingmueller, W. (1991) Regulation of nitrogen fixation genes in Azospirillum: Characterization of a nif regulatory region. In Polsinelli, M., Materassi, R. and Vincenzini, M. (eds) Nitrogen Fixation: Proceedings 5th Intl. Symp. Nitrogen Fixation with Non-legumes. Kluwer Acad. Publ., pp. 139-145.
  81. Tripathi, A. K., Kreutzer, R. and Klingmueller, W. (1989) Engineering thermostability to nitrogen fixation in soil bacteria. Proc. Intl. Congress on "Prospects in Protein Engineering", Groningen, Holland.
  82. Tripathi, A. K., Singh, D.V and Klingmueller, W. (1988) Regulation of nitrogen fixation in Azospirillum brasilense by the nifA gene of Klebsiella pneumoniae. Proc. Intl. Symp. on "Applied Plant Molecular Biology", Braunschweig, FRG pp. 247-254.
    E. Books-authored or edited:
    1. Guest editor (together with Prof. S. C. Lakhotia, BHU) special volume of "Journal of Biosciences" on 'Cellular Stress Responses' vol. 23, no. 4 October 1998

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