Enhanced biomass production of duckweeds by inoculating a plant growth-promoting bacterium, Acinetobacter calcoaceticus P23, in sterile medium and non-sterile environmental waters.

摘要: Duckweed offers the promise of co-benefit culture combining water purification with biomass production. Acinetobacter calcoaceticus P23 is a plant growth-promoting bacterium isolated from duckweed, Lemna aequinoctialis . This study quantified its effect on three duckweeds ( L. aoukikusa , minor and Spirodela polyrhiza ) in sterile Hoagland solution evaluated usefulness duckweed under non-sterile conditions. promoted growth at low to high nutrient concentrations (1.25–10 mg NO 3 -N/L 0.25–2.0 PO 4 -P/L). It increased production 3.8–4.3-fold, 2.3–3.3-fold, S. 1.4–1.5-fold after 7 days compared uninoculated controls. also 2.4-fold pond 1.7-fold secondary effluent sewage treatment conditions lab-scale experiments. rescued inhibition caused by microorganisms indigenous water. The results demonstrate that use can improve efficiency production, positive duckweed-based wastewater be assumed.