Effects of cell-free filtrates of cyanobacteria on green microalgae
Akmukhanova N.R. Seiilbek S.N. Sydykbekova R.K. Yelamanova A.B. Bakytzhan R.A. Domash G.S.
2025Schweizerbart Science Publishers
Fundamental and Applied Limnology
2025#197Issue 4255 - 263 pp.
The allelopathic properties of cyanobacteria were investigated, and their effects on microalgae were screened. Among the studied cyanobacterial cultures, Oscillatoria SS-8 exhibited the ability to suppress the growth of Chlorella vulgaris SP and Chlamydomonas reinhardtii CC-124, with inhibitions at levels of 48 % and 46 % respectively (p < 0.05). The cyanobacterial culture Synechococcus SS-3 demonstrated a stimulating effect on the growth of Chlamydomonas reinhardtii CC-124. The growth dynamics of microalgae were comparable to the control group at the end of the experiment, despite the initial reduction in cell numbers induced by the cell-free filtrates of Anabaena SS-6 and Phormidium SS-7. Chemical analysis of the cell-free filtrate of Oscillatoria SS-8 revealed the presence of various organic compounds, including hexadecanoic acid, 1,2-benzenedicarboxylic acid, and dibutyl phthalate. These compounds are widely distributed in nature and are known for their involvement in antibacterial and antioxidant processes. The results underscore the importance of studying the chemical compounds produced by cyanobacteria and their impact on aquatic ecosystem communities, as well as the interactions between different trophic levels within these ecosystems.
allelopathic activity , cyanobacteria , microalgae , secondary metabolites
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Department of Biotechnology, Faculty of Biology and Biotechnology, Al-Farabi Kazakh National University, Almaty, 050040, Kazakhstan
Department of Biotechnology
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