Research output: Contribution to journal › Article › peer-review
Effect of Humic Acids on the Metabolism of Chlorella vulgaris in a Model Experiment. / Toropkina, M. A.; Ryumin, A. G.; Kechaikina, I. O.; Chukov, S. N.
In: Eurasian Soil Science, Vol. 50, No. 11, 11.2017, p. 1294-1300.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Effect of Humic Acids on the Metabolism of Chlorella vulgaris in a Model Experiment
AU - Toropkina, M. A.
AU - Ryumin, A. G.
AU - Kechaikina, I. O.
AU - Chukov, S. N.
PY - 2017/11
Y1 - 2017/11
N2 - The effect of humic acids (HAs) on physiological processes (photosynthesis, respiration, and abundance) of green microalga Chlorella vulgaris has been studied, and the relationships between the physiological activity of HAs and their structural parameters have been investigated. It has been found that the optimum range of HA concentrations for the growth of C. vulgaris is 0.01-0.03%. In this range, the highest positive effect on total photosynthesis increment is due to hydrophilic HA preparations from fallow soddypodzolic soil (Albic Retisol) and virgin gray soil (Luvic Greyzemic Phaeozem). The minimum stimulation of respiration is noted for all HA preparations in the region of the maximum photosynthesis stimulation. At concentrations above 0.003%, all HA preparations have a negative effect: the rate of photosynthesis in C. vulgaris cells decreases, and their respiration is strongly enhanced. The abundance of C. vulgaris under the effect of all of the studied preparations under illumination increases more rapidly than in the dark. A high positive coefficient of correlation is found between the hydrophilicity of HAs calculated from C-13 NMR data and the photosynthesis rate in C. vulgaris.
AB - The effect of humic acids (HAs) on physiological processes (photosynthesis, respiration, and abundance) of green microalga Chlorella vulgaris has been studied, and the relationships between the physiological activity of HAs and their structural parameters have been investigated. It has been found that the optimum range of HA concentrations for the growth of C. vulgaris is 0.01-0.03%. In this range, the highest positive effect on total photosynthesis increment is due to hydrophilic HA preparations from fallow soddypodzolic soil (Albic Retisol) and virgin gray soil (Luvic Greyzemic Phaeozem). The minimum stimulation of respiration is noted for all HA preparations in the region of the maximum photosynthesis stimulation. At concentrations above 0.003%, all HA preparations have a negative effect: the rate of photosynthesis in C. vulgaris cells decreases, and their respiration is strongly enhanced. The abundance of C. vulgaris under the effect of all of the studied preparations under illumination increases more rapidly than in the dark. A high positive coefficient of correlation is found between the hydrophilicity of HAs calculated from C-13 NMR data and the photosynthesis rate in C. vulgaris.
KW - humic substances
KW - physiological activity
KW - photosynthesus
KW - respiration
KW - soil biota
KW - 13C-NMR
KW - amphiphily of humic acids
KW - SOIL ORGANIC-MATTER
KW - SUBSTANCES
KW - ROOT
KW - VERMICOMPOST
KW - ARABIDOPSIS
KW - EXPRESSION
KW - GROWTH
U2 - 10.1134/S1064229317110126
DO - 10.1134/S1064229317110126
M3 - статья
VL - 50
SP - 1294
EP - 1300
JO - Eurasian Soil Science
JF - Eurasian Soil Science
SN - 1064-2293
IS - 11
ER -
ID: 36574759