Biomass and dynamic changes of nutritive value over different growth periods of Potamogeton crispus in Baiyangdian Lake Biosorption and Bioaccumulation of Heavy Metals Copper,Lead and Zinc by a Submerged Aquatic Plant Potamogeton crispus L. at Low Temperature Impacts of Different Light Intensity on Morphology and Structure of Potamogeton crispus ANTIXIDANT ENZYMES ACTIVITY CHANGES AND ULTRASTRUCTURAL DAMAGE WERE CAUSED BY ZINC IN POTAMOGETON CRISPUS LINN. LEAVES Effects of water transparency on Potamogeton crispus growth and its dynamic model Effects of substrate nitrogen and phosphorus contents on Potamogeton crispus growth and reproduction. Ce3+-abating Effects on the Damage of Cu2+Stress to Potamogeton crispus Leaves Influence of water turbidity on germination of Potamogeton crispus and growth of germinated seedling Growth curve of Potamogeton crispus and its influence on water quality of plain reservoir in the Yellow River Delta Response of periphyton to nutrient level and relationships between periphyton and decay degree of Potamogeton crispus Fragment Propagation and Colonization Ability Enhanced and Varied at Node Level after Escaping from Apical Dominance in Submerged Macrophytes Physiological and ultrastructural responses of Potamogeton crispus to Hg2+ stress Effect of dietary supplements of Potamogeton crispus on laying rate and color of egg yolk in Ma duck under confinement feeding condition Toxic Effects of Cr6+ on Chlorophyll Fluorescence Parameters,Antioxidant Systems and Ultrastructure of Potamogeton crispus Effects of Weight and Store Temperature on Turion Germination and Seedling growth of Potamogeton crispus L. Stresses of Eutrophic Lake Sediment on Submersed Macrophytes Ι.Effects of Acetic Acid on Germination and Bud Growth of Elodea nuttallii and Potamogeton crispus Diurnal variation of water quality around Potamogeton crispus population