Bioprospecting antioxidants in some non-heterocystous filamentous cyanobacteria inhabit water bodies of semi-arid Rajasthan in India


Research Articles | Published:

Print ISSN : 0970-4078.
Online ISSN : 2229-4473.
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Doi: 10.1007/s42535-020-00147-0
First Page: 601
Last Page: 609
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Keywords: Antioxidants, Cyanobacteria, Bioprospects, Phycobiliproteins, Pigments, Phenolics


Cyanobacteria are ancient photosynthetic organisms inhabitant of various habitats including arid and semi- arid water bodies. These are effective producers of various biologically active compounds that have been widely used in food, medicine, cosmetics and pharmaceutical industry. However, non-heterocystous cyanobacteria of arid and semi- arid water bodies are less explored for biotechnological applications. The aim of the present study was to investigate non-heterocystous filamentous cyanobacteria of freshwater bodies of semi-arid region for their pigment profile, phenolic contents and antioxidant properties. Our results revealed that among 8 cyanobacterial strains, D. tharense AT2015/7 and S. subsalsa AT2016/1 possessed higher amount of valuable pigments, phenolic contents and also showed good antioxidant properties. S. subsalsa AT2016/1 was the most promising cyanobacterial taxa for the production of phycocyanin when compared to so far studied non-heterocystous cyanobacteria inhabit aquatic habitats. In the LC-HRMS/MS analysis, 11 phenolic compounds were tentatively identified in D. tharense AT2015/7 and nine phenolic compounds detected in S. subsalsa AT2016/1. The present study revealed that cyanobacteria thriving in the semi-arid region could be promising candidates for the production of valuable pigments, phenolic compounds and could be a potential source of antioxidants.

Antioxidants, Cyanobacteria, Bioprospects, Phycobiliproteins, Pigments, Phenolics

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We are thankful to the Department of Microbiology, Central University of Rajasthan for providing necessary facilities and Material Research Centre, MNIT, Jaipur for providing LC-HRMS/MS facility. This work was financially supported by the Department of Science and Technology, Rajasthan (P.7(3) DST/BTR&D/EAC/2018/3158). Authors are thankful to Dr. Kiran Kumar Tejavath for providing Elisa Reader facility and also Dr. Tarun Kumar Bhatt for providing Sonicator facility.

Author Information

Tomer Anuj Kumar
Department of Microbiology, School of Life Sciences, Central University of Rajasthan, Ajmer, India

Dadheech Pawan K.
Department of Microbiology, School of Life Sciences, Central University of Rajasthan, Ajmer, India