The aim of this work is to detect how 3,5-diacetamido-2,4,6-triiodosodium benzoate (sodium amidotrizoate), a synthetic derivative of the anti-auxin triiodonezoic acid (TIBA), influences the growth and content of primary metabolites in the green alga Chlorella vulgaris Beijerinck. It strongly suppressed cell number by 6–20%, chlorophyll a by 6–14%, chlorophyll b by 20–24%, total carotenoids by 7–13% and monosaccharides by 7–8% at the concentration of 10^-4 M, in comparison to the control. On the other hand, sodium amidotrizoate applied at lower concentrations (10^-7 – 10^-6 M) acted as a weak stimulator of analyzed biochemical compounds in algal cells. No statistically significant effect was detected with the application of sodium amidotrizoate at a concentration of 10^-8 M. It seems that sodium amidotrizoate plays an important role in algal growth and development and probably possesses anti-auxin activity, like TIBA.
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The effect of exogenous traumatic acid, (2E)-dodecene-1,12-dioic acid (TA), at concentrations of 10-6 - 10-3 M on the growth and development of the unicellular green alga Chlorella vulgaris was examined over 7 days. TA plays an important role in algal growth and development. Treatment with 10-5 M TA resulted in the greatest increase in cell numbers, by 77%, chlorophyll a content, by 126%, chlorophyll b, by 45%, total carotenoids, by 65%, monosaccharides, by 111%, and water-soluble proteins, by 37%, in relation to the control. After three days of treatment with 10-5 M TA cultures were analysed by SDS-PAGE, which showed the presence of new polypeptides with molecular weights 13-103 kDa.
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