Prof. A. N. Rai

Biochemistry Department

Designation: Professor

Qualifications:

  • B.Sc., Gorakhpur University
  • M.Sc. (Botany), BHU
  • Ph.D., Dundee University, Scotland

Prof. Rai joined the department as a Reader in 1984 from Hyderabad University where he was serving as a Lecturer. He became Professor in 1987. Earlier he did his Ph.D. (1977-1980) and post-doctoral at University of Dundee, UK (1980-83). His extensive research at doctoral and post-doctoral levels had already established him as an international authority in the field of N2-fixation and related metabolism. He has continued and developed the field at the department making a place for his group at international level. He had active research collaborations with Uppsala and Stockholm Universities for over two decades. He has been a Visiting Professor at Uppsala and Stockholm Universities, Sweden for varying period between 1985 and 2002. Prof. Rai has been Head of the Department (1986-89; 1990-93; 2003-2005) and the Dean of School of Life Sciences (1999-2002). As a Visitor’s nominee to various Central Universities, as member of various committees at national level, as Vice Chancellor of Mizoram University and NEHU, as Director NAAC and as member of Scientific Advisory Committee to the cabinet and central Advisory Board on Education, Prof Rai has made significant contributions. He was elected Fellow of Linnean Society London and member Institute of Biology London in 1982. He is recipient of young scientist Award (Biotechnology 1996) and Honorary D.Sc. (Rani Durgavati University). He has delivered 16 convocation Addresses.

With over 36 years of post-doctoral teaching/research experience, Prof. Rai has supervised 5 Ph.D. theses. His main research interest is in microbial biochemistry (Plant–microbe interactions/cyanobacterial physiology & biochemistry). Prof. Rai has (99 publications: 4 books, 32 book chapters, 62 research papers and 1 technical report). He has served on the editorial board and has been referee for many journals and funding agencies. He has >2200 citations.

Research grants: Prof. Rai has completed research projects funded by different national and international agencies: INSA-1 (1984-87), DST-2 (1989-1992 and 2004-2007) SAREC-SIDA, Sweden-3 (1986-89; 1990-93; 1998-2001), ICAR-1 (2006-11), DBT-1 (2007-10).

He was Head of the UGC Delegation of Indian Vice-Chancellor that visited New Zealand Universities (2012). He is recipient of Amity Academic Excellence Award (2007) and ABP News Award for outstanding contribution to Education (2012).

Area of Interest/Specialization:  Plant-Microbe Interactions, Cyanobacteria

Experience: 36 yrs Teaching / 39 yrs Research

Awards:

  • BHU Medal, 1976 (1st Position MSc)
  • Principal’s Gold Medal, 1974 (1st Position BSc)
  • Merit Certificates, 1972, 1973, 1975 1st position in Intermediate, BSc (I) and MSc (I)
  • Natl Scholarship for Studies Abroad, 1977-1980 (MHRD, India Gov, for PhD in UK)
  • Amity Academic Excellence Award (2007)
  • ABP News Awards for Outstanding Contribution to Education (2012)
  • DSc (Honoris Causa) 2013 Rani Durgavati Vishwavidyalaya, Jabalpur

PhD Awarded/Supervised:             5 PhDs Awarded

Administrative responsibilities undertaken:

  • Head,
  • Dean,
  • Vice-Chancellor (NEHU),
  • Vice-Chancellor (Mizoram Univ),
  • Director (Natl. Assessment & Accreditation Council)

Academic affiliations:  North-Eastern Hill University

Publications

  1. MJAM Sampaio, AN Rai, P Rowell & WDP Stewart (1979). Occurrence, synthesis and activity of glutamine synthetase in N2-fixing lichens. FEMS Microbiol. Letts. 6, 107-110.
  2. AN Rai (1980). Studies on the N2-fixing lichen Peltigera aphthosa Willd. PhD thesis, Dundee University, UK.
  3. AN Rai, P Rowell & WDP Stewart (1980). NH4+-assimilation and nitrogenase regulation in the lichen Peltigera aphthosa Willd. New Phytol. 85, 545-555.
  4. WDP Stewart, P Rowell & AN Rai (1980).  Symbiotic nitrogen-fixing cyanobacteria. In: Nitrogen Fixation; WDP Stewart & JR Gallon, Eds. Academic Press, London. pp. 239-277.
  5. AN Rai & HD Kumar (1980). Nitrogen-fixing cyanobacteria in the phyllosphere. SGM Quarterly 7, 106.
  6. AN Rai, P Rowell & WDP Stewart (1981). Nitrogenase activity and dark CO2 fixation in the lichen Peltigera aphthosa Willd. Planta 151, 256-264.
  7. WDP Stewart, AN Rai, RH Reed, E Creach, GA Codd & P Rowell (1981). Studies on the N2-fixing lichen Peltigera aphthosa. In: Current Perspectives in Nitrogen Fixation; AE Gibson & WE Newton, Eds. Elsevier North-Holland Biomedical Press, Amsterdam, pp 237-243.
  8. AN Rai, P Rowell & WDP Stewart (1981). The activities of glutamine synthetase and glutamate synthase in the N2-fixing lichens Peltigera aphthosa and Peltigera canina. SGM Quarterly 8, 261.
  9. AN Rai, P Rowell & WDP Stewart (1981). Glutamate synthase activity in symbiotic cyanobacteria. J Gen Microbiol. 126, 515-518.
  10. AN Rai, P Rowell & WDP Stewart (1981). 15N2-incorporation and metabolism in the lichen Peltigera aphthosa Willd. Planta 152, 544-552.
  11. AN Rai, P Rowell & WDP Stewart (1982). Glutamate synthase activity of heterocysts and vegetative cells of the cyanobacterium Anabaena variabilis Kutz. J Gen Microbiol 128, 2203-2205.
  12. AN Rai, P Rowell & WDP Stewart (1983). Mycobiont-cyanobiont interactions during dark nitrogen fixation by the lichen Peltigera aphthosa Willd. Physiol Plant 57, 285-290.
  13. WDP Stewart, T Preston, AN Rai & P Rowell (1983). Nitrogen Cycling. In: Nitrogen as an Ecological Factor, JA Lee, S MacNeill & IH Rorison, Eds. Blackwell Scientific Publications, Oxford, pp 1-27.
  14. AN Rai, P Rowell & WDP Stewart (1983). Interactions between cyanobacterium and fungus during 15N2-incorporation and metabolism in the lichen Peltigera canina (L) Willd. Arch. Microbiol. 134, 136-142.
  15. WDP Stewart, P Rowell & AN Rai (1983). Cyanobacteria-eukaryote plant symbioses. Ann. Microbiol. (Inst. Pasteur) 134B, 205-228.
  16. WDP Stewart, GA Codd & AN Rai (1983). H2 production from sunlight, air and water by N2-fixing systems involving cyanobacteria. In: Photochemical, Photoelectrochemical and Photobiological Processes Vol.II, DO Hall, W Paltz & D Pirwitz, Eds. D Reidel Publ Co., Dordrecht, The Netherlands. Pp. 214-220.
  17. AN Rai, P Rowell & WDP Stewart (1984). Methylamine transport in nitrogen-fixing cyanobacteria. In: Advances in Nitrogen Fixation Research, C Veeger & WE Newton, Eds. Nijhoff/W Junk Publ., The Hague, The Netherlands. pp. 239.
  18. VV Rao, AN Rai & HN Singh (1984). Metabolic activities of the akinetes of the cyanobacterium Anabaena doliolum: oxygen exchange, photosynthetic pigments and enzymes of nitrogen metabolism. J. Gen. Microbiol. 130, 1299-1302.
  19. AN Rai, P Rowell & WDP Stewart (1984). Evidence for an ammonium transport system in free-living and symbiotic cyanobacteria. Arch. Microbiol. 137, 241-246.
  20. SN Bagchi, UN Rai, AN Rai & HN Singh (1985). Nitrate metabolism in the cyanobacterium Anabaena cycadeae: regulation of nitrate uptake and reductase by ammonia. Physiol. Plant. 63, 322-326.
  21. SN Bagchi, AN Rai & HN Singh (1985). Regulation of nitrate reductase in cyanobacteria: repression-derepression control of nitrate reductase apoprotein in the cyanobacterium Nostoc muscorum. Biochimica et Biophysica Acta 838, 370-373.
  22. AP Kumar, AN Rai & HN Singh (1985). Nitrate reductase activity in isolated heterocysts of the cyanobacterium Nostoc muscorum. FEBS Letts. 179, 125-128.
  23. AN Rai, VV Rao & HN Singh (1985). The biology of cyanobacterial akinetes. J. Plant Sci. Res. 1, 1-20.
  24. HN Singh, AN Rai & SN Bagchi (1985). Evidence for a common genetic regulation of glutamine synthetase and nitrate uptake and reductase in the cyanobacterium Anabaena cycadeae. Mol. Gen. Genet. 198, 367-368.
  25. DT Singh, AN Rai & HN Singh (1985). Methylammonium (ammonium) uptake in a glutamine auxotroph of the cyanobacterium Anabaena cycadeae. FEBS Letts. 186, 51-53.
  26. P Rowell, AN Rai  & WDP Stewart (1985). Studies on the nitrogen metabolism of the lichens Peltigera aphthosa and Peltigera canina. In: Lichen Physiology and Cell Biology, DH Brown, Ed. Plenum Press, New York, USA. Pp. 145-160.
  27. AN Rai, DT Singh & HN Singh (1986). Regulation of methylammonium (ammonium) transport by ammonia in the cyanobacterium Anabaena variabilis ATCC 29413. Physiol. Plant. 68, 320-322.
  28. L Hallbom, B Bergman & AN Rai (1986). Immunogold localization of glutamine synthetase in the cyanobionts of the lichens Peltigera aphthosa and Peltigera canina. Lichen Physiol. Biochem. 1, 27-34.
  29. B Bergman, P Lindblad & AN Rai (1986). Nitrogenase in free-living and symbiotic cyanobacteria: immunoelectronmicroscopic localization. FEMS Microbiol. Letts. 35, 75-78.
  30. AN Rai, P Lindblad & B Bergman (1986). Absence of glutamine synthetase linked methylammonium (ammonium) transport system in the cyanobiont of the Cycas-cyanobacterial symbiosis. Planta 169, 379-381.
  31. AN Rai & B Bergman (1986). Modification of NO3- metabolism in heterocysts of the N2-fixing cyanobacterium Anabaena 7120 (ATCC 27893). FEMS Microbiol. Letts. 36, 133-137.
  32. BTVV Perraju, AN Rai, AP Kumar & HN Singh (1986). Cycas circinalis-Anabaena cycadeae symbiosis: photosynthesis and enzymes of nitrogen and hydrogen metabolism in symbiotic and cultured Anabaena cycadeae. Symbiosis 1, 239-250.
  33. P Lindblad, AN Rai & B Bergman (1987). Cycas revoluta-Nostoc symbiosis: enzymes of nitrogen and carbon metabolism in the cyanobiont. J. Gen. Microbiol. 133, 1695-1699.
  34. AN Rai, VV Rao & HN Singh (1988). Metabolic changes associated with akinete germination in the cyanobacterium Anabaena doliolum. New Phytol. 109, 133-138.
  35. AN Rai (1988). Regulation of nitrate reductase in the cyanobacterium Anabaena 7120. In: Nitrogen Fixation- Hundred Years After, H Bothe, FJ de Bruin & WE Newton, Eds. Gustav Fischer, Stuttgart, Germany. pp. 214.
  36. AK Kashyap, AN Rai & S Singh (1988). Effect of cyanophage N-1 development on nitrogen metabolism of the cyanobacterium Nostoc muscorum. FEMS Microbiol. Letts. 51, 145-148.
  37. AN Rai (1988). Nitrogen metabolism. In: Handbook of Lichenology Vol. I, M. Galum, Ed. CRC press, Boca Raton, USA. pp. 201-237.
  38. E Renstrom, AN Rai & B Bergman (1989). Glycolate metabolism in cyanobacteria II. Evidence for a mediated transport of glycolate in Anabaena 7120. Physiol. Plant. 75, 144-150.
  39. AN Rai, M Borthakur, S Singh & B Bergman (1989). Anthoceros-Nostoc symbiosis: immunoelectronmicroscopic localization of nitrogenase, glutamine synthetase, phycoerythrin and ribulose 1,5-bisphosphate carboxylase/oxygenase in the cyanobiont and the cultured isolate (free-living) Nostoc 7801. J. Gen. Microbiol. 135, 385-395.
  40. AN Rai & R Prakasham (1989). Characterization of the methylammonium (ammonium) transport systems in the N2-fixing cyanobacterium Anabaena 7120 (ATCC 27893). Ind. J. Biochem. Biophys. 26, 219-226.
  41. B Bergman & AN Rai (1989). The Nostoc –Nephroma symbiosis: localization, distribution pattern and levels of key proteins involved in nitrogen and carbon metabolism of the cyanobiont. Physiol. Plant. 77, 216-224.
  42. AN Rai (1990). Handbook of Symbiotic Cyanobacteria. CRC Press, Boca Raton, USA. ISBN: 0-8493-3275-3 (Hardback).
  43. E Renstrom-Kellner, AN Rai & B Bergman (1990). Correlation between nitrogenase and glutamine synthetase expression in the cyanobacterium Anabaena cylindrica. Physiol. Plant. 80, 12-19.
  44. AN Rai (1990). Cyanobacterial-fungal symbioses: the cyanolichens. In: Handbook of Symbiotic Cyanobacteria, AN Rai, Ed. CRC Press, Boca Raton, USA. pp. 9-41.
  45. AN Rai (1990). Cyanobacteria in symbiosis. In: Handbook of Symbiotic Cyanobacteria, AN Rai, Ed. CRC Press, Boca Raton, USA. pp. 1-7.
  46. AN Rai (1990). General methods. In: Handbook of Symbiotic Cyanobacteria, AN Rai, Ed. CRC Press, Boca Raton, USA. Pp. 231-239.
  47. AN Rai (1990). Metabolic modifications of cyanobacteria in liverwort symbioses and their use in photobiological production of ammonia. Final Technical Report for DST. pp. 1-115.
  48. R Prakasham, AK Singh, HN Singh & AN Rai (1991). Inorganic nitrogen regulation of glutamate uptake in the cyanobacterium Nostoc muscorum. Physiol. Plant. 82, 257-260.
  49. R Prakasham & AN Rai (1991). Evidence for the occurrence of a specific methylammonium transport system in the cultured cyanobiont of the Anthoceros punctatus-Nostoc association. J Gen Microbiol. 137, 1783-88.
  50. AN Rai & R Prakasham (1991). Transport of inorganic nitrogen in cyanobacteria and its relevance in use of cyanobacteria as biofertilizers. In: Biological Nitrogen Fixation Associated with Rice Production, SK Dutta & C Sloger, Eds. Oxford & IBH Publ. Co. Pvt. Ltd., New Delhi, India. pp. 177-190.
  51. R Prakasham, AN Rai, AK Singh & HN Singh (1991). Influence of different forms of nitrogen on uptake of ammonium, glutamate and glutamine in the cyanobacterium Nostoc muscorum. Ind. J. Biochem. Biophys. 28, 263-266.
  52. AK Singh, HN Singh & AN Rai (1991). Evidence for a role of glutamine synthetase in assimilation of amino acids as nitrogen source in the cyanobacterium Nostoc muscorum. Biochem. Int. 25, 887-894.
  53. AN Rai, M Borthakur, E Soderback & B Bergman (1992). Immunogoldlocalization of hydrogenase in the cyanobacterial-plant symbioses: Peltigera canina, Anthoceros punctatus and Gunnera magellanica. Symbiosis 12, 131-144.
  54. AN Rai, M Borthakur & B Bergman (1992). Nitrogenase derepression, its regulation and metabolic changes associated with diazotrophy in the filamentous non-heterocystous cyanobacterium Plectonema boryanum PCC 73110. J. Gen. Microbiol. 138, 483-491.
  55. AN Rai (1992). Regulation of primary ammonia assimilation and expression of nitrogenase and glutamine synthetase by nitrate and ammonia in heterocysts. In: Proc. Natl. Symp. Cyanobacterial Nitrogen Fixation, BD Kaushik, Ed. Associated Publ. Co., New Delhi. pp. 11-22.
  56. R Prakasham & AN Rai (1992). Methylammonium/ammonium transport and metabolism in the heterocystous cyanobacteria Anabaena 7120 and Nostoc ANTH. In: Proc. Natl. Symp. Cyanobacterial Nitrogen Fixation, BD Kaushik, Ed. Associated Publ. Co., New Delhi. pp. 49-62.
  57. HN Singh, AN Rai, AK Singh, SK Verma & S Katiyar (1992). Regulation of nitrogen transport, nitrogen metabolism and extracellular production of ammonia in the cyanobacterium Nostoc muscorum. In: Proc. Natl. Symp. Cyanobacterial Nitrogen Fixation, BD Kaushik, Ed. Associated Publ., New Delhi. pp. 23-34.
  58. AK Singh, SK Verma, HN Singh & AN Rai (1992). Glutamate inhibition of N2 fixation and its regulation by nitrate and ammonia in the cyanobacterium Nostoc muscorum. Ind. J. Exp. Biol. 30, 384-387.
  59. B Bergman, AN Rai, C Johanson & E Soderback (1992). Cyanobacterial-plant symbioses. Symbiosis 14, 61-81.
  60. S Janson, AN Rai & B Bergman (1993). The marine lichen Lichina confinis (O.F. Mull) c. Ag.: Ultrastructure and localization of nitrogenase, glutamine synthetase, phycoerythrin and ribulose 1,5-bisphosphate carboxylase/oxygenase in the cyanobiont. New. Phytol. 124, 149-160.
  61. AN Rai & R Prakasham (1994). Transport of inorganic nitrogen in cyanobacteria: implications for biotechnology. In: Frontiers in Microbial Technology, PS Bisen, Ed. CBS Publ. & Distributors, New Delhi, India. pp. 45-51.
  62. AN Rai (1994). Cyanobacteria in symbiosis: a review. In: Recent Advances in Phycology, AK Kashyap & HD Kumar, Eds. Rastogi & Co., New Delhi, India. pp. 31-38.
  63. S Janson, AN Rai & B Bergman (1995). Intracellular cyanobiont Richelia intracellularis: ultrastructure and immunolocalization of phycoerythrin, nitrogenase, Rubisco and glutamine synthetase. Mar. Biol. 124, 1-8.
  64. AN Rai, M Borthakur & D Paul (1996). Symbiotic cyanobacteria: biotechnological applications. J. Sci. Indus. Res. 55, 742-752.
  65. B Bergman, J Gallon, AN Rai & L Stal (1997). Nitrogen fixation by nonheterocystous cyanobacteria. FEMS Microbiol. Rev. 19, 139-185.
  66. AN Rai, M Borthakur & D Paul (1998). Cyanobacterial symbioses. In: Advances in Phycology, BN Verma, AN Kargupta & SK Goyal, Eds. APC Publ., New Delhi, India. pp. 81-107.
  67. AN Rai (1998). Cyanobacterial nitrogen metabolism: relevance in agricultural biotechnology. In: Cyanobacterial Biotechnology, G Subramanian, BD Kaushik & GS Venkatraman, Eds. Oxford & IBH Publ., New Delhi, India. pp. 223-231.
  68. AN Rai (1999). Cyanobacterial nitrogen metabolism: relevance in agricultural biotechnology with reference to North-East India. Proc. Natl. Conference on Sci. & Technol. in North-east India, Shillong. PP. 137-147.
  69. AN Rai, E Soderback & B Bergman (2000). Tansley Review: Cyanobacterium-Plant symbioses. New Phytol. 147, 449-481.
  70. AN Rai, U Rasmussen & B Bergman (2002). Cyanobacteria in Symbiosis. Kluwer Acad Publ, Dordrecht, The Netherlands.
  71. AN Rai (2002). Cyanolichens: nitrogen metabolism. In: Cyanobacteria in Symbiosis, AN Rai, U Rasmussen & B Bergman, Eds. Kluwer Academic Publ., Dordrecht, The Netherlands. pp. 97-115.
  72. J Bhattacharya, AK Singh & AN Rai (2002). Nitrogen nutrition in the cyanobacterium Nostoc ANTH, a symbiotic isolate from Anthoceros: Uptake and assimilation of inorganic-N and amino acids. Ind. J. Biochem. Biophys. 39, 163-169.
  73. J Bhattacharya, AK Singh & AN Rai (2002). Isolation and characterization of a chlorate-resistant mutant (Clo-R) of the symbiotic cyanobacterium, Nostoc ANTH: Heterocyst formation and N2-fixation in the presence of nitrate, and evidence for separate nitrate and nitrite transport systems. Curr. Microbiol. 45, 99-104
  74. AN Rai & B Bergman (2002) Creation of new N2-fixing cyanobacterial associations. Biol. & Environ.: Proc. Royal Irish Acad. 102B, 65-68.
  75. AN Rai & B Bergman (2002). Cyanolichens. Biol. & Environ.: Proc. Royal Irish Acad. 102B, 19-22.
  76. M Nilsson, J Bhattacharya, AN Rai & B Bergman ( 2002). Colonization of roots of rice (Oryza sativa L.) by symbiotic Nostoc strains. New Phytol. 155, 517-525.
  77. AN Rai (2004). Laboratory safety guidelines. NEHU Press, Shillong.
  78. J Bhattacharya, A K Singh, RKS Singh & AN Rai (2005). Metronidazole as a specific inhibitor of nitrogenase activity in the heterocystous cyanobacterium Nostoc ANTH, an isolate from Anthoceros punctatus. Ind.J.Microbiol.45, 115-120.
  79. N Khumanthem, MB Syiem, AK Singh & AN Rai (2006). Physiological and biochemical characterization of a thermophilic diazotrophic cyanobacterium Mastigocladus species. In: HN Pandey & SK Barik, eds, Ecology, Diversity & Conservation of Plants & Ecosystems in India. Regency Publs, N. Delhi. p. 354-365.
  80. RKS Singh, AK Singh, MB Syiem & AN Rai (2006). Colonization of roots of rice and associative N2-fixation by a symbiotic strain of Nostoc. In: HN Pandey & SK Barik, eds, Ecology, Diversity and Conservation of Plants and Ecosystems in India. Regency Publications, New Delhi. Pp. 366-376.
  81. AK Singh, MB Syiem, AN Rai (2006). Biodiversity of cyanobacteria: a molecular approach. In: Biotechnological applications of cyanobacteria. Kiran Singh, ed. Academic World, Varanasi. Pp. 1-12.
  82. DG Adams, B Bergman, SA Nierzwicki-Baur, AN Rai & A Schussler (2006). Cyanobacterial-plant symbioses. In: The Prokaryotes. A Handbook on the biology of bacteria, third edition. Vol. 1: Symbiotic associations, biotechnology, applied microbiology. M Dworkin, S Falkow, E Rosenberg, K-H Schleifer & E Stackebrandt. Springer, New York, pp 331-363.
  83. B Bergman, AN Rai & U Rasmussen (2007). Cyanobacterial associations. In: Associative and endophytic nitrogen-fixing bacteria and cyanobacteria Vol 5: C. Elmerich & WE Newton, Eds. Springer, Dordrecht, The Netherlands. Pp. 257-292.
  84. O Kyndiah & A N Rai (2007). Induction of sporulation by sulphate limitation in Nostoc ANTH, a symbiotic strain capable of colonizing roots of rice plants. Ind.J.Biotechnol. 6, 57-62.
  85. MB Syiem, AK Singh, AN Rai, N Khumanthem, RS Singh, S Adhikari & A Bhattacharjee (2007). Nitrogen metabolism, artificial association study in two cyanobacterial isolates and assessment of their potential as biofertilizer. Ind. J. Biotechnol. 6, 397-403.
  86. N Khumanthem, AN Rai, AK Singh & MB Syiem (2007). Isolation and characterization of a Mastigocladus species capable of growth, N2-fixation and N-assimilation at elevated temperature. Ind. J. Microbiol. 47, 345-352.
  87. A Bhattacharjee, NA Nongrum, MB Syiem, S Adhikari & AN Rai (2008). Role of cyanobacteria in cadmium bioremediation in rice-fields. Proc Natl Seminar “Toxicity of chemicals and their hazards with special reference to heavy metals”. Eds. SN Mazumdar et al., St Edmunds College, Shillong, India, pp. 73-74.
  88. NA Nongrum, A Bhattacharjee, MB Syiem & AN Rai (2008). Role of proline in management of NaCl and pH stress in cyanobacteria. Proc Natl Seminar “Toxicity of chemicals and their hazards with special reference to heavy metals”. Eds. SN Mazumdar et al., St Edmunds College, Shillong, India, pp. 114-120.
  89. AK Singh, MB Syiem, RKS Singh, S Adhikari & AN Rai (2008). A common transport system for methionine, MSX and PPT in diazotrophic filamentous cyanobacterium Nostoc muscorum. Curr. Microbiol. 56, 436-41.
  90. MB Syiem, AK Singh & AN Rai (2009). Nitrogen metabolism in cyanobacteria. In: “Algal Biology & Biotechnology”. Eds. JIS Khattar, DP Singh & G. Kaur. Punjabi University, Patiala, pp. 81-96.
  91. N Khumanthem, AK Singh, MB Syiem, AN Rai (2009). Methylammonium uptake in the thermophilic cyanobacterium, Mastigocladus laminosus. In: Biology and Biodiversity of Microalgae. N Anand, Ed. CAS in Botany, University of Madras, Chennai, pp. 331-341.
  92. MB Syiem, AK Singh, AN Rai (2011). Nitrogen metabolism in cyanobacteria. In: PK Prasad Ed. Phycodiversity: Aspects and Prospects. Daya Publ House, New Delhi. pp. 1-19. ISBN: 978-81-7035-678-3.
  93. C Akoijam, AK Singh AN Rai (2012). Characterization of free-living cyanobacterial strains and and their competence to colonize rice roots. Biol Fert. Soils 48, 679-687.
  94. MB Syiem & AN Rai (2013). Cyanobacteria in symbiosis: cellular responses. In: AK Srivastava et al Eds, Stress Biology of Cyanobacteria: Cellular Responses. CRC Press, Boca Raton, FL, USA. pp. 257-272.
  95. AK Srivastava, AN Rai, BA Neilan (2013). Stress Biology of Cyanobacteria: molecular mechanisms to cellular responses. CRC Press, Boca Raton , Florida, USA. pp 394.ISBN:978-1-4665-0478-3 (Hardback).
  96. DG Adams, B Bergman, SA Nierzwicki-Bauer, PS Duggan, AN Rai & A Schussler (2013). Cyanobacterial-Plant Symbioses. In: The Prokaryotes – Prokaryotic Biology and Symbiotic Associations. Eds. E Rosenberg, EF DeLong, S Lory, E Stackebrandt  & F Thompsen. Springer-Verlag Berlin Heidelberg. pp. 359-400. ISBN 978-3-642-30193-0
  97. J Patil & AN Rai (2013). Need for a National Quality Assurance Framework for Higher Education in light of RUSA and mandatory accreditation regime. Univ. News, 51 (39), pp. 29-36.
  98. JS Singh, A Kumar, AN Rai & DP Singh (2016). Cyanobacteria: a precious bio-resource in agriculture, ecosystem and environmental sustainability. Frontiers in Microbiology 7: 529 (pp1-19). Doi: 10.3389/fmicb.2016.00529. (Elsevier, IF 3.98). 19 pages.
  99. AK Srivastava, AN Rai, BA Neilan (2017). Stress Biology of Cyanobacteria: molecular mechanisms to cellular responses. CRC Press, Boca Raton , Florida, USA. pp 394. ISBN:9781-1381-98746 (Paperback), 9781-4665-75196 (E-book).
  100. MB Syiem, AK Singh & AN Rai (2017). N2-fixing cyanobacterial systems as biofertilizer. In: Agro-Environmental Sustainability Vol I: Managing Crop Health. Eds.  JS Singh & G Seneviratne. Springer International Publishing AG. PP. 43-61. ISBN: 978-3-319-49724-2.
  101. OL Diengdoh, MB Syiem, K Pakshirajan and AN Rai (2017). Zn2+ removal from aqueous solution by Nostoc muscorum: thermodynamics, equilibrium isotherms and biosorption parameters. Environ Monit Assess 189: 314 (13 pages). DOI 10.1007/s10661-017-6013-4.
  102. AN Rai (2017). Handbook of Symbiotic Cyanobacteria. CRC Press, Boca Raton, Florida. ISBN: 9781315892085 (Hardback).
  103. AN Rai (2018). Handbook of Symbiotic Cyanobacteria. E-Book. CRC Press, Boca Raton, Florida. ISBN: 97813510-88084.
  104. T Phukan, AN Rai and MB Syiem (2018). Dose dependent variance in UV-C radiation induced effects on carbon and nitrogen metabolism in the cyanobacterium Nostoc muscorum Meg1. Ecotoxicol Environ. Safety 155, 171-179.
  105. T Phukan, AN Rai and MB Syiem (2019). Unstandardized UV-C dose used for killing harmful cyanobacteria may instead initiate accelerated growth in the target organism. Ecotoxicol. Environ. Safety 181, 274-283.
  106. AN Rai, AK Singh and MB Syiem (2019). Plant growth promoting abilities in cyanobacteria. In: Cyanobacteria: From Basic Science to Applications. Eds. AK Mishra, DN Tiwari and AN Rai. Elsevier Inc – Academic Press, London, Oxford (UK) & Cambridge, San Diego (USA). PP. 459-476.
  107. AK Mishra, DN Tiwari and AN Rai (2019). Cyanobacteria: From Basic Science to Applications. Academic Press, London, Oxford (UK) & Cambridge, San Diego (USA). 522 pages. ISBN: 978-0-12-814667-5.
  108. B Chettri, NA Singha, A Mukherjee, AN Rai, D Chattopadhyay and AK Singh (2019). Hydrocarbon degradation potential and competitive persistence of hydrocarbonoclastic bacterium Acinetobacter pittii strain ABC. Arch. Microbiol. http://doi.org/10.1007/s00203-019-01687-z. 05 June 2019.

Papers presented in Conferences/Seminars:

  1. WDP Stewart, AN Rai, GM Gadd, MJAM Sampaio & P Rowell (1979). Nitrogen-fixing symbioses involving cyanobacteria. Abs A-28, Proc. Third Int. Conf. Photosynthetic Prokaryotes, Oxford, England. Ed. JM Nicholls.
  2. AN Rai, P Rowell & WDP Stewart (1980). Nitrogen metabolism in the lichen Peltigera aphthosa. Abs. 182, Fourth International Symposium on Nitrogen Fixation, Canberra, Australia.
  3. WDP Stewart, AN Rai, RH Reed, E Creach, GA Codd & P Rowell (1980). Symbiotic nitrogen-fixing cyanobacteria. Abs 43, Ivth Int. Symp Nitrogen Fixation, Canberra, Australia.
  4. WDP Stewart, AN Rai, P Rowell, SM Ip, MH Mian, RH Reed & MJ Hawkesford (1981). Studies on N2-fixing symbiotic cyanobacteria. Paper presented at European Symp. Nitrogen Fixation (Enzymology, Physiology & Genetics), Grenoble, France.
  5. AN Rai, P Rowell & WDP Stewart (1981). Pathways of 15N2-assimilation in the lichen Peltigera canina. Paper presented at Int. Symp. Photosynthetic C, N and S Metabolism, Leicester, England.
  6. AN Rai, P Rowell & WDP Stewart (1982). Nitrogen metabolism in symbiotic cyanobacteria. Paper presented at SEB Conf. Symbiotic Nitrogen Fixation, Leiden, The Netherlands.
  7. AN Rai, P Rowell & WDP Stewart (1982). Interrelations of carbon and nitrogen metabolism in the N2-fixing lichens Peltigera canina and Peltigera aphthosa. Abs B-39, 4th Int. Conf. Photosynthetic Prokaryotes, Bombannes, France.
  8. AN Rai, P Rowell & WDP Stewart (1983). Methylamine transport in N2-fixing cyanobacteria. Abs 4A-16, 5th  Int. Symp. Nitrogen Fixation, Noordwijkerhout, The Netherlands.
  9. HN Singh & AN Rai (1983). Modulation of nitrogen fixation and ammonia assimilation in cyanobacteria with agricultural implications. P. 12, Abstract of the 24th Annual Conf. Microbiologist of India, Hyderabad, India.
  10. HN Singh, AN Rai, DT Singh, SN Bagchi & VV Rao (1984). Manipulation of nitrogen-fixing cyanobacteria for photobiological production of ammonia, p. 172. Abs 7th Int Biotechnol Conf, New Delhi, India.
  11. AP Kumar, AN Rai, HN Singh (1984). Heterocyst differentiation as a mechanism to avoid direct competition for Mo between the two molybdoenzymes nitrogenase and nitrate reductase, in Nostoc muscorum; p. 5-6, Abs 25th Annual Conf Microbiologists of India, Pantnagar, India.
  12. AN Rai (1985). Nitrogen metabolism in isolated heterocysts and akinetes of cyanobacteria. Paper presented at the 5th Swedish Meeting on Nitrogen Fixation, Umea, Sweden.
  13. AN Rai (1985). Cyanobacterial symbioses: interactions between photosynthesis and nitrogen fixation. Paper presented at the Natl Symp Photophysical & Photochemical Processes in Biological Systems, Hyderabad, India.
  14. AN Rai (1987). Cyanobacteria in symbiosis. Special Invited Lecture at the International Phycotalk Symposium, Varanasi, India.
  15. AN Rai (1988). Regulation of nitrate reductase in cyanobacteria. Paper presented at the 7th International Symp. Nitrogen Fixation, Cologne, Germany.
  16. B Bergman, AN Rai & E Soderback (1988). Nostoc of Anthoceros and Gunnera symbioses: immunoelectronmicroscopic localization of key proteins, p. 50. Proc. 6th Photosynthetic Prokaryotes Congress, Amsterdam, The Netherlands.
  17. AN Rai & R Prakasham (1988). Transport of inorganic nitrogen in cyanobacteria and its relevance in use of cyanobacteria as biofertilizers. Paper presented at the International Symposium and Workshop on Biological Nitrogen Fixation and Rice Production and Rice Culture, Cuttack, India.
  18. AN Rai (1990). Regulation of primary ammonia assimilation and expression of nitrogenase and glutamine synthetase by nitrate and ammonia in heterocysts. Paper presented at the Natl. Symp. Cyanobacterial Nitrogen Fixation, New Delhi, India.
  19. AN Rai (1991. Metabolic changes associated with induction of nitrogenase in nonheterocystous cyanobacteria. Paper presented at the NATO Advanced Workshop on Marine Cyanobacteria, Bamberg, Germany.
  20. AN Rai (1991). Uptake and metabolism of ammonia, methylamine and ethylenediamine by the Nostoc cyanobiont of Anthoceros puctatus. International Symbiosis Congress, Jerusalem, Israel.
  21. AN Rai (1996). Cyanobacterial nitrogen metabolism: relevance in agricultural biotechnology. Paper presented at Int Symp Cyanobacterial Biotechnology, Tiruchirapally, India.
  22. AN Rai (1999). Cyanobacterial nitrogen metabolism: relevance in agricultural biotechnology with particular reference to North-East India. Natl Symp Science and Technology in North-East India, Shillong, India.
  23. AN Rai (2000). Cyanolichens. Paper presented at European Science Foundation Workshop & Summer School on Symbiotic Cyanobacteria at Vallyvaugan, Ireland.
  24. AN Rai (2000). Creation of new N2-fixing cyanobacterial symbioses. Paper presented at European Science Foundation Workshop & Summer School on Symbiotic Cyanobacteria at Vallyvaugan, Ireland.
  25. AN Rai (2003). Cyanobacteriua-plant symbioses. Keynote address and paper presented at symposium on ‘Cyanobacteria and Plants under Stress: responses, defense strategies and biotechnological applications’ at Banaras Hindu University, Varanasi; 25-27 Feb 2003.
  26. AN Rai (2004). Blue-green algae in symbiosis: potential for creating new nitrogen-fixing associations. Keynote address and paper presented at Natl Symp. ‘Recent trends in algal biology and biotechnology’, Feb 4-5, 2004, Punjabi Univ, Patiala.
  27. AN Rai (2004). Keynote speaker (cyanobacterial symbioses) and member national organising committee of ‘Natl Sem. & training workshop on impact of changing climate on biodiversity conservation and ecofunctional status’. January 15-17, 2004, Jiwaji Univ, Gwalior.
  28. AN Rai (2004). Need for microbial databases & networking). Keynote address at ‘International workshop on isolation, preservation and conservation of microorganisms’. NBAIM-CAB, New Delhi. March 2004.
  29. AN Rai (2006). Chief Guest and Keynote address. Research methodology in basic sciences. AIU Workshop, Assam University, Silcher, 13-17 Nov.
  30. AN Rai (2006). Cyanolichens. Keynote address at ‘International conference on algal bioresource utilization. Assam University, Silchar, Dec. 4-6.
  31. AN Rai (2007). Analysing biodiversity of symbiotic cyanobacteria. Keynote address at ‘Workshop on microbial metagenomics’ at NBAIM, Mau, 7th Feb.