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International Journal on Algae
SJR: 0.219 SNIP: 0.261 CiteScore™: 0.24

ISSN Print: 1521-9429
ISSN Online: 1940-4328

International Journal on Algae

DOI: 10.1615/InterJAlgae.v14.i2.60
pages 182-197

Modelling Nitrate Uptake and Nitrite Release by Seaweed

V. A. Silkin
Southern Branch of the P.P. Shirshov Inst. of Oceanology, RAS, 353467 Gelendzhik, Krasnodar Region, Russia ; Institute of Cosmic Research, RAS, 84/32, Profsoyuznaya St., 17997Moscow, Russia
V.D. Dzizurov
Pacific Research Fish Industry Centre, 4, Shevchenko Alley, Vladivostok, Russia
V.K. Chasovnikov
Southern Branch of the P.P. Shirshov Inst. of Oceanology, RAS, 353467 Gelendzhik, Krasnodar Region, Russia
N.I. Esin
Southern Branch of the P.P. Shirshov Inst. of Oceanology, RAS, 353467 Gelendzhik, Krasnodar Region, Russia

ABSTRACT

The kinetics of nitrate uptake, their assimilation in cell and the kinetics of nitrite release under different initial concentration of nitrates is described with the help of mathematical model The hypothesis of immutability of ferments which take part in transformation of different forms of nitrogen is assumed as a basis of the model. The content of these ferments can be changed only; the induction of their synthesis depends on the initial concentration of nitrates. It is shown that the maximum velocity of nitrate uptake (equal to the activity of nitratereductase) depends on the initial concentration of nitrates and may be presented by hyperbolic function with saturation. It is shown on the example of seaweed Gelidium latifolium (Grev.) Born. et Thur. (Rhodophyta) that the maximum velocity of nitrate absorption can be 5 times more that the initial one.


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