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Abstract

The influence of salicylic acid concentrations on Isochrysis galbana growth dynamics of in the enrichment culture was evaluated. The cultivation was carried out in monoculture. The increase in algal biomass was found by the increasing of cells number, counted in each experiment under a light microscope. The duration of the experiments was 7 days. It was found that the concentrations of salicylic acid 2.8 - 5.6  × 10-7 mol/l had a stimulating effect on the growth dynamics of I. galbana cells, compared with the control group. The maximum cells growth  in culture was observed with the addition of salicylic acid at a concentration of 2.8 × 10-7 mol/l, while the specific growth rate at a given concentration of salicylic acid on the 7th day of the experiment was 1.2 times higher than in the control group. The assessment of the biochemical parameters of the culture of I. galbana with the addition of salicylic acid at a concentration of 2.8 × 10-7 mol/l during 7 days of the experiment was carried out in comparison with the control group. The maximum protein content in the experimental group was noted on the 7th day of the experiment. The increase was 76.9% compared to the initial value. It was shown that the maximum increase in the content of lipids and carbohydrates in the experimental group fell on the 5th day of the experiment. The growth in these indicators was 41.7 and 87%, respectively. The chlorophyll content increased throughout the entire time of the experiment both in the control and in the experimental groups, while the highest value of this indicator was noted for the experimental group.

Authors

N. N. Kovalev
S. E. Leskova
E. V. Mikheev

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