Potassium-induced inhibition of nitrogen and phosphorus metabolism as a strategy of controlling <Emphasis Type="Italic">Microcystis</Emphasis> blooms |
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Authors: | Bideh Shukla Lal Chand Rai |
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Institution: | (1) Laboratory of Algal Biology, Center of advanced study in Botany, Banaras Hindu University, Varanasi, 221005, India |
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Abstract: | To explore potassium toxicity in Microcystis sp., growth, chlorophyll a, carotenoid and phycocyanin content, uptake of nitrate, phosphate and ammonium and activities of the assimilatory enzymes
nitrate reductase, alkaline phosphatase and glutamine synthetase (GS) were studied. Nitrate, phosphate, ammonium uptakes and
chlorophyll a and phycocyanin contents decreased with increase in the concentration of potassium, but carotenoid content registered an
increase at increasing potassium concentration. Alkaline phosphatase and GS activities followed the trend of inhibition of
their respective nutrients, whereas nitrate and nitrate reductase showed negative correlation (p < 0.01). Potassium was found to inhibit the activities of all the assimilatory enzymes in a non-competitive manner. Inhibitions
of these parameters support the view that potassium has the potential to regulate Microcystis blooms in an eco-friendly manner. |
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Keywords: | Bloom Microcystis Non-competitive Potassium |
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