Streltsova T.A. Natural virus-free Grounds of the Altai mountains as longevity’s bioresource of valuable varieties and problems of potato degeneration

Al-Farabi Kazakh National University, Almaty, Kazakhstan

Abstract

In the research water samples were biologically tested using cyanobacteria strains Nostoccalsicola Z-2 and Synechococcuselongatus IS-2.
Water samples were taken from three sewage treatment facilities located
in Almaty: water from the bio-ponds, water from the storage Sorbulak and
biologically treated water located near the «Tospasu» plant. As a control
group a standard culture medium without the addition of water samples
were taken. With the help of Nostoccalsicola Z-2 strain, water samples’
index of toxicity factor from sewage treatment facilities were calculated to
be in the range from 0.57 to 0.73 based on the diameter of colonies. This
data corresponds to the class of medium and low toxicity and it appears
to reduce the magnitude of test- functions in the experiment as compared
with the control. Water samples from treatment facilities of Almaty are
characterized by low and middle level of toxicity in comparison to Nostoccalsicola Z-2 and Synechococcuselongatus IS-2. The results of biological
testing showed that the strain of the cyanobacterium Nostoccalsicola Z-2
is a sensitive test object with respect to the test samples of water and can
be recommended for use as a model for bioassay of polluted water reserviors.
Key words: cyanobacteria, bioassay, toxicity index factor, toxicity,
Sorbulak hoarder.