High-Spatial and High-Mass Resolution Imaging of Surface Metabolites of Arabidopsis thaliana by Laser Desorption-Ionization Mass Spectrometry Using Colloidal Silver

High-spatial resolution and high-mass resolution techniques are developed and adopted for the mass spectrometric imaging of epicuticular lipids on the surface of Arabidopsis thaliana. Single cell level spatial resolution of ∼12 μm was achieved by reducing the laser beam size by using an optical fibe...

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Veröffentlicht in:Analytical Chemistry 2010-04, Vol.82 (8), p.3255-3265
Hauptverfasser: Jun, Ji Hyun, Song, Zhihong, Liu, Zhenjiu, Nikolau, Basil J, Yeung, Edward S, Lee, Young Jin
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container_end_page 3265
container_issue 8
container_start_page 3255
container_title Analytical Chemistry
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creator Jun, Ji Hyun
Song, Zhihong
Liu, Zhenjiu
Nikolau, Basil J
Yeung, Edward S
Lee, Young Jin
description High-spatial resolution and high-mass resolution techniques are developed and adopted for the mass spectrometric imaging of epicuticular lipids on the surface of Arabidopsis thaliana. Single cell level spatial resolution of ∼12 μm was achieved by reducing the laser beam size by using an optical fiber with 25 μm core diameter in a vacuum matrix-assisted laser desorption ionization-linear ion trap (vMALDI-LTQ) mass spectrometer and improved matrix application using an oscillating capillary nebulizer. Fine chemical images of a whole flower were visualized in this high spatial resolution showing substructure of an anther and single pollen grains at the stigma and anthers. The LTQ-Orbitrap with a MALDI ion source was adopted to achieve MS imaging in high mass resolution. Specifically, isobaric silver ion adducts of C29 alkane (m/z 515.3741) and C28 aldehyde (m/z 515.3377), indistinguishable in low-resolution LTQ, can now be clearly distinguished and their chemical images could be separately constructed. In the application to roots, the high spatial resolution allowed molecular MS imaging of secondary roots and the high mass resolution allowed direct identification of lipid metabolites on root surfaces.
doi_str_mv 10.1021/ac902990p
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Chem</addtitle><description>High-spatial resolution and high-mass resolution techniques are developed and adopted for the mass spectrometric imaging of epicuticular lipids on the surface of Arabidopsis thaliana. Single cell level spatial resolution of ∼12 μm was achieved by reducing the laser beam size by using an optical fiber with 25 μm core diameter in a vacuum matrix-assisted laser desorption ionization-linear ion trap (vMALDI-LTQ) mass spectrometer and improved matrix application using an oscillating capillary nebulizer. Fine chemical images of a whole flower were visualized in this high spatial resolution showing substructure of an anther and single pollen grains at the stigma and anthers. The LTQ-Orbitrap with a MALDI ion source was adopted to achieve MS imaging in high mass resolution. Specifically, isobaric silver ion adducts of C29 alkane (m/z 515.3741) and C28 aldehyde (m/z 515.3377), indistinguishable in low-resolution LTQ, can now be clearly distinguished and their chemical images could be separately constructed. 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Chem</addtitle><date>2010-04-15</date><risdate>2010</risdate><volume>82</volume><issue>8</issue><spage>3255</spage><epage>3265</epage><pages>3255-3265</pages><issn>0003-2700</issn><eissn>1520-6882</eissn><coden>ANCHAM</coden><abstract>High-spatial resolution and high-mass resolution techniques are developed and adopted for the mass spectrometric imaging of epicuticular lipids on the surface of Arabidopsis thaliana. Single cell level spatial resolution of ∼12 μm was achieved by reducing the laser beam size by using an optical fiber with 25 μm core diameter in a vacuum matrix-assisted laser desorption ionization-linear ion trap (vMALDI-LTQ) mass spectrometer and improved matrix application using an oscillating capillary nebulizer. Fine chemical images of a whole flower were visualized in this high spatial resolution showing substructure of an anther and single pollen grains at the stigma and anthers. 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subjects ADDUCTS
ALDEHYDES
Aldehydes - chemistry
ALKANES
Alkanes - chemistry
Analytical chemistry
ARABIDOPSIS
Arabidopsis - metabolism
Chemistry
Colloids - chemistry
DESORPTION
Exact sciences and technology
FLOWERS
INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
ION SOURCES
Ions
LASERS
LIPIDS
MASS RESOLUTION
MASS SPECTROMETERS
Mass spectrometry
MASS SPECTROSCOPY
METABOLITES
Molecules
OPTICAL FIBERS
OTHER INSTRUMENTATION
Plant Roots - chemistry
POLLEN
RESOLUTION
SILVER
Silver - chemistry
SILVER IONS
SPATIAL RESOLUTION
Spectrometric and optical methods
Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization - methods
STAMEN
title High-Spatial and High-Mass Resolution Imaging of Surface Metabolites of Arabidopsis thaliana by Laser Desorption-Ionization Mass Spectrometry Using Colloidal Silver
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