title: Tissue-specific metabolite profiling of Cyperus rotundus L. rhizomes and (+)-nootkatone quantitation by laser microdissection, ultra-high-performance liquid chromatography-quadrupole time-of-flight mass spectrometry, and gas chromatography-mass spectrometry techniques.
abstract: Cyperus rotundus L. is a plant species commonly found in both India and China. The caused destruction of this plant is of critical concern for agricultural produce. Nevertheless, it can serve as a potential source of the commercially important sesquiterpenoid (+)-nootkatone. The present work describes comparative metabolite profiling and (+)-nootkatone content determination in rhizome samples collected from these two countries. Laser dissected tissues, namely, the cortex, hypodermal fiber bundles, endodermis, amphivasal vascular bundles, and whole rhizomes were analyzed by ultra-high-performance liquid chromatography-quadrupole time-of-flight mass spectrometry (UHPLC-QTOF MS). Gas chromatography-mass spectrometry (GC-MS) analysis was used for profiling of essential oil constituents and quantitation of (+)-nootkatone. The content of (+)-nootkatone was found to be higher in samples from India (30.47 μg/10 g) compared to samples from China (21.72 μg/10 g). The method was validated as per International Conference on Harmonisation (ICH) guidelines (Q2 R1). The results from this study can be applied for quality control and efficient utilization of this terpenoid-rich plant for several applications in food-based industries.
authors.affiliation: School of Chinese Medicine, Hong Kong Baptist University , Kowloon, Hong Kong Special Administrative Region, People's Republic of China.
authors.forename: Yogini
authors.initials: Y
authors.lastname: Jaiswal
authors.forename: Zhitao
authors.initials: Z
authors.lastname: Liang
authors.forename: Ping
authors.initials: P
authors.lastname: Guo
authors.forename: Hing-Man
authors.initials: HM
authors.lastname: Ho
authors.forename: Hubiao
authors.initials: H
authors.lastname: Chen
authors.forename: Zhongzhen
authors.initials: Z
authors.lastname: Zhao
mesh_terms: D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D029786:Cyperus / Q000378:metabolism*; D008401:Gas Chromatography-Mass Spectrometry; D007834:Lasers; D013058:Mass Spectrometry / Q000379:methods*; D000081223:Polycyclic Sesquiterpenes; D012717:Sesquiterpenes / Q000032:analysis*
chemical_list: D000081223:Polycyclic Sesquiterpenes; D012717:Sesquiterpenes; C050302:nootkatone