title: The logistic growth of duckweed (Lemna minor) and kinetics of ammonium uptake.
abstract: Mathematical models have been developed to describe nitrogen uptake and duckweed growth experimentally to study the kinetics of ammonium uptake under various concentrations. The kinetics of duckweed ammonium uptake was investigated using the modified depletion method after plants were grown for two weeks at different ammonium concentrations (0.5-14 mg/L) in the culture medium. The maximum uptake rate and Michaelis-Menten constant for ammonium were estimated as 0.082 mg/(g fresh weight x h) and 1.877 mg/L, respectively. Duckweed growth was assessed when supplied at different total nitrogen (TN) concentrations (1-5 mg/L) in the culture medium. The results showed that the intrinsic growth rate was from 0.22 to 0.26 d(-1), and TN concentrations had no significant influence on the duckweed growth rate.
authors.forename: Kun
authors.initials: K
authors.lastname: Zhang
authors.forename: You-Peng
authors.initials: YP
authors.lastname: Chen
authors.forename: Ting-Ting
authors.initials: TT
authors.lastname: Zhang
authors.forename: Yun
authors.initials: Y
authors.lastname: Zhao
authors.forename: Yu
authors.initials: Y
authors.lastname: Shen
authors.forename: Lei
authors.initials: L
authors.lastname: Huang
authors.forename: Xu
authors.initials: X
authors.lastname: Gao
authors.forename: Jin-Song
authors.initials: JS
authors.lastname: Guo
mesh_terms: D064751:Ammonium Compounds / Q000737:chemistry* / Q000493:pharmacokinetics*; D029064:Araceae / Q000254:growth & development / Q000378:metabolism*; D001673:Biodegradation, Environmental; D018533:Biomass; D003470:Culture Media / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D007477:Ions; D007700:Kinetics; D008962:Models, Theoretical; D009584:Nitrogen / Q000032:analysis / Q000737:chemistry; D013053:Spectrophotometry; D013696:Temperature; D014865:Waste Disposal, Fluid / Q000379:methods; D018508:Water Purification / Q000379:methods
chemical_list: D064751:Ammonium Compounds; D003470:Culture Media; D007477:Ions; D009584:Nitrogen