title: Pectinase production by Aspergillus niger using wastewater in solid state fermentation for eliciting plant disease resistance.
abstract: An elicitor of plant disease resistance, pectinase, was produced by solid state fermentation with Aspergillus niger. Sugar beet pulp was used as carbon source and the wastewater from monosodium glutamate production was used as nitrogen and water source. The composition of the fermentation medium was: 11 ml concentrated wastewater (containing NH3-N 38.2 mg/ml), sugar beet pulp 10 g, Na2HPO4.12H2O 0.2 g, KH2PO4 0.04 g in a 500 ml Erlenmeyer flask. The fermentation temperature was 30 degrees C and the relative humidity of the air was 75-90%. The maximum production of pectinase was reached after 96 h cultivation. The crude pectinase extracted from the fermented materials could elicit disease resistance in cucumber and tomato seedlings.
authors.affiliation: Department of Environmental Bio-Technology, The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, P.O. Box 2871, Beijing 100085.
authors.forename: Z H
authors.initials: ZH
authors.lastname: Bai
authors.forename: H X
authors.initials: HX
authors.lastname: Zhang
authors.forename: H Y
authors.initials: HY
authors.lastname: Qi
authors.forename: X W
authors.initials: XW
authors.lastname: Peng
authors.forename: B J
authors.initials: BJ
authors.lastname: Li
mesh_terms: D001234:Aspergillus niger / Q000378:metabolism*; D002244:Carbon / Q000378:metabolism; D018553:Cucumis sativus / Q000187:drug effects / Q000502:physiology; D003470:Culture Media; D005285:Fermentation; D007113:Immunity, Innate / Q000187:drug effects; D007218:Industrial Microbiology / Q000379:methods*; D018551:Solanum lycopersicum / Q000187:drug effects / Q000502:physiology; D009584:Nitrogen / Q000378:metabolism; D010935:Plant Diseases; D011096:Polygalacturonase / Q000378:metabolism* / Q000494:pharmacology; D036226:Seedlings / Q000187:drug effects; D013696:Temperature; D014865:Waste Disposal, Fluid
chemical_list: D003470:Culture Media; D002244:Carbon; D011096:Polygalacturonase; D009584:Nitrogen