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Bioassay of water from urban river systems of Armenia using model test system

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R.E. Avalyan, E.A. Aghajanyan, A.L. Atoyants, R.M. Aroutiounian

Section: Monitoring of natural and anthropogenically disturbed areas

The Tradescantia clone 02 stamen hair mutations (Trad-SHM) and Tradescantia micronucleus (Trad-MCN) bioassays are two of the efficient and reliable biomonotory test systems for mutagenicity of air, water and soil polutans. The genotoxicity and clastogenicity of water samples collected from diferent sites of Razdan river were assessed by means of Trad-SHM and Trad-MCN assay using model test plant Tradescantia (clone 02). Here we report a significant increase in the level of somatic mutation (recessive mutation events – RME) and micronuclei (MN) in tetrads of pollen microspores frequency in the Tradescantia inflorescences exposed to the water samples of river compared to the background. The maximum manifestation of these genetic effects from both investigated bioassays was observed in Kievsky bridge water samples. A significant positive correlation between the somatic mutation events and MN with tetrads was revealed. These results indicate that Trad-SHM and Trad-MCN bioassays of the Tradescantia clone 02 can be applied for biotesting of water quality of river’s ecosystems.

Keywords: Tradescantia clone 02, biotesting, genotoxicity, clastogenicity, water pollution

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Article published in number 1 for 2021
DOI: 10.25750/1995-4301-2021-1-097-103