Department of Biological Sciences

Indian Institute of Science Education and Research Mohali
(0172) 229 3152
headbiology@iisermohali.ac.in
Education
  • 1978

    B. Sc.

    Botany, Zoology, Chemistry

  • 1980

    M. Sc.

    Botany

  • 1984

    Ph. D.

    Botany

People
Sambuddha Talukdar M Sc Botany

Ph. D. student

Mahima M Sc Biotechnology

Ph. D. student

Teaching
Publication
Biosynthesis of carotenoids in Azospirillum brasilense Cd is mediated via squalene (C30) route. 2024, Tiwari N,Tripathi AK. Biochemical and Biophysical Research Communications 722 (150154), 150154

Engineering D-glucose utilization in Azospirillum brasilense Sp7 promotes rice root colonization. 2022, Singh VS,Dubey BK,Rai S,Singh SP,Tripathi AK. Applied Microbiology and Biotechnology 106 (23), 7891-7903

Deciphering the role of the two conserved motifs of the ECF41 family σ factor in the autoregulation of its own promoter in Azospirillum brasilense Sp245. 2022, Pathak E,Dubey AP,Singh VS,Mishra R,Tripathi AK. Proteins 90 (11), 1926-1943

β-lactam resistance in Azospirillum baldaniorum Sp245 is mediated by lytic transglycosylase and β-lactamase, and regulated by a cascade of RpoE7→RpoH3 sigma factors. 2022, Pandey, P., Dubey, A.P., Mishra, S., Singh, C., Singh, V. S. and Tripathi, A.. Journal of Bacteriology (ASM)

Role of a fasciclin domain protein in photooxidative stress and flocculation in Azospirillum brasilense Sp7. 2021, Dubey AP,Pandey P,Mishra S,Gupta P,Tripathi AK. Research in Microbiology 172 (6), 103875

Co-metabolism of ethanol in Azospirillum brasilense Sp7 is mediated by fructose and glycerol and regulated negatively by an alternative sigma factor RpoH2. 2021, Singh, V. S., Dubey, B. K., Pandey, P., Rai, S. and Tripathi, A. K. Journal of Bacteriology (ASM)

Characterization of carotenoids and genes encoding their biosynthetic pathways in Azospirillum brasilense. 2021, Mishra, S., Chanotiya, C., Shanker, K., Tripathi, A. K. FEMS Microbiology Letters

Construction of Antisense RNA-mediated Gene Knock-downStrains in the Cyanobacterium Anabaena sp. PCC 7120. 2020, Srivastava A,Ballal A,Forchhammer K,Tripathi AK. Bio-protocol 10 (4), e3528

Engineering a carotenoid-overproducing strain of Azospirillum brasilense for heterologous production of geraniol and amorphadiene. 2020, Mishra S,Pandey P,Dubey AP,Zehra A,Chanotiya CS,Tripathi AK,Mishra MN. Applied and Environmental Microbiology 86 (17),

An ECF41 family σ factor controls motility and biogenesis of lateral flagella in Azospirillum brasilense Sp245. 2020, Dubey AP,Pandey P,Singh VS,Mishra MN,Singh S,Mishra R,Tripathi AK. Journal of Bacteriology 202 (16),

Whole-Genome Sequences of Four Indian Isolates of Azospirillum brasilense. 2019, Singh C,Pandey P,Singh DN,Pandey R,Shasany AK,Tripathi AK. Microbiology resource announcements 8 (31),

Dicarboxylate transporters of Azospirillum brasilense Sp7 play an important role in the colonization of finger millet (Eleusine coracana) roots. 2019, Singh VS,Tripathi P,Pandey P,Singh DN,Dubey BK,Singh C,Singh SP,Pandey R,Tripathi AK. Molecular Plant-Microbe Interactions: MPMI 32 (7), 828-840

Catalase expression in Azospirillum brasilense Sp7 is regulated by a network consisting of OxyR and two RpoH paralogs and including an RpoE1→RpoH5 regulatory cascade. 2018, Rai AK,Singh S,Dwivedi SK,Srivastava A,Pandey P,Kumar S,Singh BN,Tripathi AK. Applied and Environmental Microbiology 84 (23),

Regulation of a glycerol-induced quinoprotein alcohol dehydrogenase by σ54 and a LuxR-type regulator in Azospirillum brasilense Sp7. 2017, Singh VS,Dubey AP,Gupta A,Singh S,Singh BN,Tripathi AK. Journal of Bacteriology 199 (13),

Down-regulation of the alternative sigma factor SigJ confers a photoprotective phenotype to Anabaena PCC 7120. 2016, Srivastava A,Brilisauer K,Rai AK,Ballal A,Forchhammer K,Tripathi AK. Plant & Cell Physiology 58 (2), 287-297

Expression of alkyl hydroperoxide reductase is regulated negatively by OxyR1 and positively by RpoE2 sigma factor in Azospirillum brasilense Sp7. 2016, Singh S,Dwivedi SK,Singh VS,Tripathi AK. Microbiology (Reading, England) 162 (10), 1870-1883

Carotenoid biosynthetic pathways are regulated by a network of multiple cascades of alternative sigma factors in Azospirillum brasilense Sp7. 2016, Rai AK,Dubey AP,Kumar S,Dutta D,Mishra MN,Singh BN,Tripathi AK. Journal of Bacteriology 198 (21), 2955-2964

Identification and characterization of a novel phosphodiesterase from the metagenome of an Indian coalbed. 2015, Singh DN,Gupta A,Singh VS,Mishra R,Kateriya S,Tripathi AK. PloS one 10 (2), e0118075

Unravelling the genome of Holy basil: an "incomparable" "elixir of life" of traditional Indian medicine. 2015, Rastogi, S., Kalra, A., Gupta, V., Khan, F., Lal, R. K., Tripathi, A. K., Parameswaran, S., Gopalakrishnan. C., Ramaswamy, G., Shasany, A. K.. BMC Genomics 16, 413

A SAM-dependent methyltransferase cotranscribed with arsenate reductase alters resistance to peptidyl transferase center-binding antibiotics in Azospirillum brasilense Sp7. 2014, Singh S,Singh C,Tripathi AK. Applied Microbiology and Biotechnology 98 (10), 4625-4636

Cross-talk between cognate and noncognate RpoE sigma factors and Zn(2+)-binding anti-sigma factors regulates photooxidative stress response in Azospirillum brasilense. 2014, Gupta N,Gupta A,Kumar S,Mishra R,Singh C,Tripathi AK. Antioxidants & redox signaling 20 (1), 42-59

Coal induced production of a rhamnolipid biosurfactant by Pseudomonas stutzeri, isolated from the formation water of Jharia coalbed. 2013, Singh DN,Tripathi AK. Bioresource technology 128 (), 215-221

A constitutively expressed pair of rpoE2-chrR2 in Azospirillum brasilense Sp7 is required for survival under antibiotic and oxidative stress. 2013, Gupta N,Kumar S,Mishra MN,Tripathi AK. Microbiology (Reading, England) 159 (Pt 2), 205-218

An invasive Mimosa in India does not adopt the symbionts of its native relatives. 2013, 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.. Annals of Botany 112: 179-196

Bacteriophytochrome controls carotenoid-independent response to photodynamic stress in a non-photosynthetic rhizobacterium, Azospirillum brasilense Sp7. 2012, Kumar S,Kateriya S,Singh VS,Tanwar M,Agarwal S,Singh H,Khurana JP,Amla DV,Tripathi AK. Scientific reports 2 (1), 872

RpoH2 sigma factor controls the photooxidative stress response in a non-photosynthetic rhizobacterium, Azospirillum brasilense Sp7. 2012, Kumar S,Rai AK,Mishra MN,Shukla M,Singh PK,Tripathi AK. Microbiology (Reading, England) 158 (Pt 12), 2891-2902

Cultivation-independent analysis of archaeal and bacterial communities of the formation water in an Indian coal bed to enhance biotransformation of coal into methane. 2012, Singh DN,Kumar A,Sarbhai MP,Tripathi AK. Applied microbiology and biotechnology 93 (3), 1337-1350

Evaluation of the coal-degrading ability of Rhizobium and Chelatococcus strains isolated from the formation water of an Indian coal bed. 2011, Singh DN,Tripathi AK. Journal of microbiology and biotechnology 21 (11), 1101-1108

An extracytoplasmic function sigma factor cotranscribed with its cognate anti-sigma factor confers tolerance to NaCl, ethanol and methylene blue in Azospirillum brasilense Sp7. 2011, Mishra MN,Kumar S,Gupta N,Kaur S,Gupta A,Tripathi AK. Microbiology (Reading, England) 157 (Pt 4), 988-999

Gene encoding gamma-carbonic anhydrase is cotranscribed with argC and induced in response to stationary phase and high CO2 in Azospirillum brasilense Sp7. 2010, Kaur S,Mishra MN,Tripathi AK. BMC Microbiology 10 (1), 184

Regulation of expression and biochemical characterization of a β-class carbonic anhydrase from the plant growth-promoting rhizobacterium,Azospirillum brasilenseSp7. 2009, Kaur S,Mishra MN,Tripathi AK. FEMS Microbiology Letters 299 (2), 149-158

Biodegradation of trichloroethylene (TCE) by methanotrophic community. 2009, Shukla AK,Vishwakarma P,Upadhyay SN,Tripathi AK,Prasana HC,Dubey SK. Bioresource Technology 100 (9), 2469-2474

Diversity of 16S-rRNA and nifH genes derived from rhizosphere soil and roots of an endemic drought tolerant grass, Lasiurus sindicus. 2009, Paul Chowdhury, S., Schmid, S., Hartmann, A. and Tripathi, A.K.. European Journal of Soil Biology 45:114-122

Bio-sequestration of carbon dioxide using carbonic anhydrase enzyme purified from Citrobacter freundii 2009, Rishiram R., Krishnamurthi K., Saravana Devi S., Mudliar, S., Kaur, S., Tripathi, A. K. and Chakrabarti, T.. World Journal of Microbiology & Biotechnology 25:981-987

Mutation in a gene encoding anti-σ factor inA. brasilenseconfers tolerance to elevated temperature, antibacterial peptide and PEG-200 via carotenoid synthesis. 2008, Mishra MN,Thirunavukkarasu N,Sharma IM,Jagnnadham MV,Tripathi AK. FEMS Microbiology Letters 287 (2), 221-229

An extra-cytoplasmic function sigma factor and anti-sigma factor control carotenoid biosynthesis in Azospirillum brasilense. 2008, Thirunavukkarasu N,Mishra MN,Spaepen S,Vanderleyden J,Gross CA,Tripathi AK. Microbiology (Reading, England) 154 (Pt 7), 2096-2105

Identification of salt stress inducible genes that control cell envelope related functions in Azospirillum brasilense Sp7. 2007, Nagarajan T,Vanderleyden J,Tripathi AK. Molecular genetics and genomics: MGG 278 (1), 43-51

Identification of diazotrophs in the culturable bacterial community associated with roots of Lasiurus sindicus, a perennial grass of Thar Desert, India. 2007, Chowdhury SP,Schmid M,Hartmann A,Tripathi AK. Microbial ecology 54 (1), 82-90

Strain-specific salt tolerance and osmoregulatory mechanisms in Azospirillum brasilense. 2007, Chowdhury SP,Nagarajan T,Tripathi R,Mishra MN,Le Rudulier D,Tripathi AK. FEMS microbiology letters 267 (1), 72-79

Adenosine diphosphate ribosylation of dinitrogenase reductase and adenylylation of glutamine synthetase control ammonia excretion in ethylenediamine-resistant mutants of Azospirillum brasilense Sp7. 2006, Srivastava A,Tripathi AK. Current microbiology 53 (4), 317-323

Ochrobactrum oryzae sp. nov., an endophytic bacterial species isolated from deep-water rice in India. 2006, Tripathi AK,Verma SC,Chowdhury SP,Lebuhn M,Gattinger A,Schloter M. International journal of systematic and evolutionary microbiology 56 (Pt 7), 1677-1680

Exploration of soil bacterial communities for their potential as bioresource. 2006, Dubey SK,Tripathi AK,Upadhyay SN. Bioresource technology 97 (17), 2217-2224

Molecular diversity of tannic acid degrading bacteria isolated from tannery soil. 2004, Chowdhury SP,Khanna S,Verma SC,Tripathi AK. Journal of Applied Microbiology 97 (6), 1210-1219

Phylogeny based on 16S rDNA and nifH sequences of Ralstonia taiwanensis strains isolated from nitrogen-fixing nodules of Mimosa pudica, in India. 2004, Verma SC,Chowdhury SP,Tripathi AK. Canadian journal of microbiology 50 (5), 313-322

Enrichment and identification of bacteria capable of reducing chemical oxygen demand of anaerobically treated molasses spent wash. 2004, Ghosh M,Verma SC,Mengoni A,Tripathi AK. Journal of applied microbiology 96 (6), 1278-1286

Endophytic colonization ability of two deep-water rice endophytes, Pantoea sp. and Ochrobactrum sp. using green fluorescent protein reporter. 2004, Verma SC,Singh A,Chowdhury SP,Tripathi AK. Biotechnology letters 26 (5), 425-429

Molecular characterization of a salt-tolerant bacterial community in the rice rhizosphere. 2002, Tripathi AK,Verma SC,Ron EZ. Research in microbiology 153 (9), 579-584

Bioremediation of toxic chromium from electroplating effluent by chromate-reducing Pseudomonas aeruginosa A2Chr in two bioreactors. 2002, Ganguli A,Tripathi AK. Applied microbiology and biotechnology 58 (3), 416-420

Inhibition of biosynthesis and activity of nitrogenase in Azospirillum brasilense Sp7 under salinity stress. 2002, Tripathi AK,Nagarajan T,Verma SC,Rudulier DL. Current microbiology 44 (5), 363-367

Evaluation of plant growth promoting and colonization ability of endophytic diazotrophs from deep water rice. 2001, Verma SC,Ladha JK,Tripathi AK. Journal of biotechnology 91 (2-3), 127-141

Contact
Work Email: director[at]iisermohali[dot]ac[dot]in Address: Director Office, Administrative Block, IISER-Mohali, Sector 81, SAS Nagar 140306, INDIA

Indian Institute of Science Education and Research (IISER)- Mohali
Knowledge City, Sector 81, SAS nagar 140306, INDIA
headbiology@iisermohali.ac.in| +91 172 2240266

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