Considering the imporatance of some aquatic macrophytes in Bangladesh and their gradual declination of the population from the natural habitats, ex- situ culture studies of five selected species, namely, Nymphaea rubra Roxb., Enhydra fluctuans Lour., Ipomoea aquatica Forsk., Hygroryza aristata (Retz.) Nees ex Wight & Arn. and Limnocharis flava (L.) Buch. were carried out. So, ex-situ culture studies for their conservation and at the same time to know the nutritional properties of these aquatic plants have been investigated. Comparing the biochemical composition of the above mentioned five...