Original Research Article I Volume 10 I Issue 2 I 2024

Studies on Biologically Active Compounds Produced by Certain Members of Non Heterocystous Cyanobacteria

Rajitha Tungani and Raju Porika

The American Journal of Science and Medical Research (2024), 10(2); 1-6



Cyanobacteria, also called blue-green algae, are O2-evolving photosynthetic prokaryotes, many (though not all) of which can fix N2. N2-fixing (diazotrophic) cyanobacteria can be broadly grouped as heterocystous and non-heterocystous forms. All heterocystous forms are capable of aerobic N2 fixation and, in the absence of combined nitrogen, 5–10% of their vegetative cells differentiate into specialized cells called heterocysts that provide an environment suitable for the functioning of nitrogenase (the enzyme that catalyses N2 fixation). Unlike vegetative cells, heterocysts are photo synthetically inactive. They do not fix CO2, nor do they produce O2. Cyanobacteria generally remain potential source for investigations as prospective and excellent sources of biologically active constituents produced during primary and especially secondary metabolism. The soil samples containing NHC were collected from different paddy fields in and around Warangal district, Telangana State. About 10 samples were collected from different locations and utilized for enrichment studies in BG–11 medium without nitrogen supplementation. Strains were transferred in liquid nutrient BG 11 medium all the collected Non Heterocystous cyano bacteria strains were maintained at 7.2 pH, 28+20C and with a 14/10-hour light/dark cycle photoperiod. The morphology of Oscillatoria curviceps, Oscillatoria princeps and Oscillatoria acuta was influenced similarly by physicochemical properties of soil. Although Oscillatoria corntiana and Oscillatoria quadrapanculata belong to the same order and family, the latter was influenced differently due to the physicochemical properties of the soil. All extracts exhibited different degrees of antimicrobial activity unrelatedly to the tested pathogen.


Heterocystous, Cyanobacteria, diazotropic, NHC, Telangana


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Article Dates:

Received: 12 January 2024; Accepted: 18 February 2024; Published: 01 April, 2024

How To Cite:

Rajitha Tungani and Raju Porika. Studies on Biologically Active Compounds Produced by Certain Members of Non Heterocystous Cyanobacteria. In The American Journal of Science and Medical Research. 2024. 10(2);1–6. https://doi.org/10.5281/zenodo.11054412

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