title: Analysis of acidic endogenous phytohormones in grapes by using online solid-phase extraction coupled with LC-MS/MS.
abstract: Phytohormones play important roles in regulating numerous plant physiological and developmental processes, even during the postharvest storage period. In order to determine the functions and changes of gibberellins acid (GA3), indoleacetic acid (IAA), abscisic acid (ABA), indolebutyric acid (IBA) and jasmonic acid (JA) in grape berries during storage, an ultrasensitive method based on direct injection online solid-phase extraction coupled with high-performance liquid chromatography tandem mass spectrometry (LC-MS/MS) was developed. Grape berries were extracted with cold methanol. After centrifugation, the supernatants were concentrated with a vacuum centrifugal concentrator and injected into an online solid-phase extraction column. After the cleanup procedure, the analytes were determined by LC-MS/MS. The results showed that the linearity of the proposed method was 10-210 µg kg(-1) for ABA, 20-200 µg kg(-1) for IBA, 15-320 µg kg(-1) for IAA, 20-320 µg kg(-1) for GA3 and 3.0-90.0 µg kg(-1) for JA. The limits of detection of the method were 0.71, 2.79, 0.94, 0.39 and 0.57 µg kg(-1), respectively. The proposed method was successfully applied to the analysis of endogenous phytohormones in grape berries during the postharvest storage period.
authors.affiliation: College of Horticulture, Northwest A & F University, Yangling, Shaanxi 712100, China College of Life Science, Tarim University, Xinjiang 843300, China.
authors.forename: Jian-Na
authors.initials: JN
authors.lastname: Yu
authors.affiliation: College of Life Science, Tarim University, Xinjiang 843300, China.
authors.forename: Qing-Yan
authors.initials: QY
authors.lastname: Meng
authors.affiliation: College of Life Science, Tarim University, Xinjiang 843300, China.
authors.forename: Wen-Jie
authors.initials: WJ
authors.lastname: Liu
authors.affiliation: College of Life Science, Tarim University, Xinjiang 843300, China.
authors.forename: Ya-Ling
authors.initials: YL
authors.lastname: Lu
authors.affiliation: College of Horticulture, Northwest A & F University, Yangling, Shaanxi 712100, China renxl@nwsuaf.edu.cn.
authors.forename: Xiao-Lin
authors.initials: XL
authors.lastname: Ren
mesh_terms: D000040:Abscisic Acid / Q000032:analysis; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D003517:Cyclopentanes / Q000032:analysis; D061353:Food Storage; D005638:Fruit / Q000737:chemistry; D007210:Indoleacetic Acids / Q000032:analysis; D007211:Indoles / Q000032:analysis; D057230:Limit of Detection; D054883:Oxylipins / Q000032:analysis; D010937:Plant Growth Regulators / Q000032:analysis*; D015203:Reproducibility of Results; D052616:Solid Phase Extraction / Q000379:methods*; D053719:Tandem Mass Spectrometry / Q000379:methods*; D027843:Vitis / Q000737:chemistry*
chemical_list: D003517:Cyclopentanes; D007210:Indoleacetic Acids; D007211:Indoles; D054883:Oxylipins; D010937:Plant Growth Regulators; C014612:indolebutyric acid; C011006:jasmonic acid; C030737:indoleacetic acid; D000040:Abscisic Acid