Significance of Nuphar Species in the Aquatic Habitat

On the other hand, it was found that N. variegatum (growing at Flin Flon, Manitoba, Canada) does not accumulate elements such as Zn, Cu, and Cd in amounts comparable to the water milfoil (Myriophyllum exalbescens) and so cannot be used as a biological indicator of contamination (6). The possibilities 

Nuphar lutea, a plant very sensitive to perturbations such as those which may accompany the mining of metal ores, was also examined in order to measure the content of radionuclides in a series of uranium group elements (11). In experiments carried out in the Okanagan region of south-central British Columbia, N. lutea was found to accumulate natural uranium and 226 Ra, and the amounts of these elements were found to depend on the season and also on the pH of the mud. Nuphar lutea was also used in investigations into the concentration of137Cs and potassium in Lake Ulkesjon in the southern part of Sweden (12). 

Similar nonalkaloidal classes of compounds were isolated from Nuphar lutea thus, the presence of fraws-cinnamic, arachidic, behenic, and palmitic acids was confirmed in rhizomes (27) and that of ellagic, caffeic, p-coumaric, sinapic, and 

Finally, it was also found that the tissue of Nuphar advena Ait. contains cyclic adenosine 3 -5 -monophosphate (cAMP) in amounts similar to those published for algae (25). 

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