Impact of mercury (II) nitrate on physiological and biochemical characteristics of selected marine algae of different classes
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Date
2015
Journal Title
Journal ISSN
Volume Title
Publisher
Procedia Environmental Science
Abstract
Short-term physiological and biochemical responses induced by mercury(II) nitrate (Hg(NO3)2) in three marine macroalgae,
Gracilaria salicornia (Rhodophyceae), Sargassum sp. (Phaeophyceae) and Ulva reticulata (Chlorophyceae) were studied. All
algae were good accumulators of Hg. However, this characteristic significantly decreases in G. salicornia and significantly
increases in U. reticulata as concentration of Hg increases. Algal FV/FM, chlorophyll (chl) a content and relative growth showed a
significant reduction in the presence of Hg. Hg impact was prominent in FV/FM than the other parameters while a small impact
was shown by the relative growth. Hg induced synthesis of new amino acids and inhibit the production of some. The profile even
changed when the concentration of Hg(NO3)2 increases.
Description
Keywords
heavy metals, marine alga, maximal quantum yield, chl a content, amino acid content