Profile of Metal Accumulation in Aquatic Macrophytes
Journal Title: International Journal of Current Research and Review - Year 2018, Vol 10, Issue 16
Abstract
Industrial development coupled with population growth has resulted in the over exploitation of natural resources. Life support systems viz; water, air and soil are thus getting exposed to an array of pollutants especially heavy metals released by anthropogenic activities. Tolerant species of aquatic plants are able to survive and withstand the pollution stress serves as pollution indicators and as tool for phytoremediation of heavy metals is an environment clean up strategy in which green plants are employed to remove toxic contaminants and operates on the principles of biogeochemical cycling. The aquatic plants viz; Salvinia molesta and Pistia stratiotes were used for its toxicity and profile of metal accumulation (Cadmium –Cd) from synthetic media. The test plants were cultured in a modified Hoagland solution supplemented with cadmium nitrate Cd (NO3)2. The present study focuses on Cd toxicity on morphology, biochemical parameters and bioaccumulation potential of Salvinia and Pistia. The laboratory experiments were conducted for the assay of morphological index parameters (MIP), biochemical parameters, and profile of cadmium accumulation in test plants at various concentrations viz, 0.1 ,0.5 ,1.0,1.5 & 2.0 ppm at 4 days regular intervals for 12 days exposure. The test plants show visible symptoms, like withering of roots, chlorosis, necrosis and in particular, at higher concentrations (2.0 ppm) lower leaves gets decayed. However, the lower concentrations i.e. 0.1 ppm shows normal growth. The estimation of biochemical parameters viz total chlorophyll, protein & carbohydrates of test plants showed significant increased at lower concentrations i.e. 0.1 ppm of Cd. The biochemical constituents decreased with increase in exposure concentrations i.e.0.5 to 2.0 ppm. The toxic effect Cd was directly proportional to its concentrations and exposure durations. The profile of metal accumulation by both test plants was maximum at 4 days exposure irrespective concentrations and gradually decreases at subsequent exposure concentrations and duration.
Authors and Affiliations
N. M. Rolli
Keywords
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- EP ID EP533579
- DOI 10.31782/IJCRR.2018.10165
- Views 142
- Downloads 0
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