title: Effects of pulsed electric field on secondary metabolism of Vitis vinifera L. cv. Gamay Fréaux suspension culture and exudates.
abstract: Plant cell cultures provide a large potential for the production of secondary metabolites. Through the application of different physical and chemical cell stress factors, we investigated the production of the secondary metabolites in plant cell cultures. The effects of pulsed electric field (PEF) and ethephon on growth and secondary metabolism, particularly anthocyanins and phenolic acids synthesis, were investigated by using suspension culture of Vitis vinifera L. cv. Gamay Fréaux as a model system. Anthocyanins were measured by spectrophotometer and extracellular phenolic acids were determined by high-performance liquid chromatography. The compounds were identified by liquid chromatography-mass spectrometry and nuclear magnetic resonance. After the treatments with PEF and ethephon, the concentrations of anthocyanins and phenolic acids in cell culture were higher than in the control, without loss of biomass. The combination of PEF treatment and ethephon improved secondary metabolites formation. Production levels of extracellular phenolic acids, 3-O-glucosyl-resveratrol were increased by PEF and ethephon treatments. The results show that PEF induced a defense response of plant cells and may have altered the cell/membrane's dielectric properties. PEF, an external stimulus or stress, is proposed as a promising new abiotic elicitor for stimulating secondary metabolites biosynthesis in plant cell cultures.
authors.affiliation: Institute of Food Biotechnology and Food Chemistry, Berlin University of Technology, Germany. zhenzhen.cai@mailbox.tu-berlin.de
authors.forename: Zhenzhen
authors.initials: Z
authors.lastname: Cai
authors.forename: Heidi
authors.initials: H
authors.lastname: Riedel
authors.forename: Nay Min Min
authors.initials: NM
authors.lastname: Thaw Saw
authors.forename: Onur
authors.initials: O
authors.lastname: Kütük
authors.forename: Inga
authors.initials: I
authors.lastname: Mewis
authors.forename: Henry
authors.initials: H
authors.lastname: Jäger
authors.forename: Dietrich
authors.initials: D
authors.lastname: Knorr
authors.forename: Iryna
authors.initials: I
authors.lastname: Smetanska
mesh_terms: D000872:Anthocyanins / Q000032:analysis; D018929:Cell Culture Techniques; D002851:Chromatography, High Pressure Liquid; D004574:Electromagnetic Fields; D004734:Energy Metabolism / Q000502:physiology; D062385:Hydroxybenzoates / Q000032:analysis; D010940:Plant Proteins / Q000378:metabolism; D010944:Plants / Q000378:metabolism; D000077185:Resveratrol; D013267:Stilbenes / Q000378:metabolism; D013535:Suspensions / Q000032:analysis; D027843:Vitis / Q000378:metabolism*
chemical_list: D000872:Anthocyanins; D062385:Hydroxybenzoates; D010940:Plant Proteins; D013267:Stilbenes; D013535:Suspensions; C017616:phenolic acid; D000077185:Resveratrol