Different localization patterns of anthocyanin species in the pericarp of black rice revealed by imaging mass spectrometry

Black rice (Oryza sativa L. Japonica) contains high levels of anthocyanins in the pericarp and is considered an effective health-promoting food. Several studies have identified the molecular species of anthocyanins in black rice, but information about the localization of each anthocyanin species is...

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Veröffentlicht in:PloS one 2012-02, Vol.7 (2), p.e31285-e31285
Hauptverfasser: Yoshimura, Yukihiro, Zaima, Nobuhiro, Moriyama, Tatsuya, Kawamura, Yukio
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Zaima, Nobuhiro
Moriyama, Tatsuya
Kawamura, Yukio
description Black rice (Oryza sativa L. Japonica) contains high levels of anthocyanins in the pericarp and is considered an effective health-promoting food. Several studies have identified the molecular species of anthocyanins in black rice, but information about the localization of each anthocyanin species is limited because methodologies for investigating the localization such as determining specific antibodies to anthocyanin, have not yet been developed Matrix-assisted laser desorption/ionization imaging mass spectrometry (MALDI-IMS) is a suitable tool for investigating the localization of metabolites. In this study, we identified 7 species of anthocyanin monoglycosides and 2 species of anthocyanin diglycosides in crude extracts from black rice by matrix-assisted laser desorption/ionization mass spectrometry (MALDI-MS) analysis. We also analyzed black rice sections by MALDI-IMS and found 2 additional species of anthocyanin pentosides and revealed different localization patterns of anthocyanin species composed of different sugar moieties. Anthocyanin species composed of a pentose moiety (cyanidin-3-O-pentoside and petunidin-3-O-pentoside) were localized in the entire pericarp, whereas anthocyanin species composed of a hexose moiety (cyanidin-3-O-hexoside and peonidin-3-O-hexoside) were focally localized in the dorsal pericarp. These results indicate that anthocyanin species composed of different sugar moieties exhibit different localization patterns in the pericarp of black rice. This is the first detailed investigation into the localization of molecular species of anthocyanins by MALDI-IMS.
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We also analyzed black rice sections by MALDI-IMS and found 2 additional species of anthocyanin pentosides and revealed different localization patterns of anthocyanin species composed of different sugar moieties. Anthocyanin species composed of a pentose moiety (cyanidin-3-O-pentoside and petunidin-3-O-pentoside) were localized in the entire pericarp, whereas anthocyanin species composed of a hexose moiety (cyanidin-3-O-hexoside and peonidin-3-O-hexoside) were focally localized in the dorsal pericarp. These results indicate that anthocyanin species composed of different sugar moieties exhibit different localization patterns in the pericarp of black rice. This is the first detailed investigation into the localization of molecular species of anthocyanins by MALDI-IMS.</abstract><cop>United States</cop><pub>Public Library of Science</pub><pmid>22363605</pmid><doi>10.1371/journal.pone.0031285</doi><tpages>e31285</tpages><oa>free_for_read</oa></addata></record>
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subjects Actinidia chinensis
Adhesives
Agriculture
Animal behavior
Anthocyanins
Anthocyanins - chemistry
Anthocyanins - metabolism
Antibodies
Arabidopsis
Arabidopsis thaliana
Biological Transport
Biology
Biosynthesis
Chemistry
Cultivars
Desorption
Flowers - metabolism
Genes
Health promotion
Hexose
Identification
Imaging, Three-Dimensional - methods
Ionization
Ions
Lasers
Litchi chinensis
Localization
Mass spectrometry
Mass spectroscopy
Metabolites
Monosaccharides
Oryza - metabolism
Oryza sativa japonica
Pentose
Pericarp
Pigmentation - physiology
Plant Extracts - chemistry
Rice
Scientific imaging
Seeds
Species
Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization - methods
Spectroscopy
Studies
Sugar
Transcription factors
title Different localization patterns of anthocyanin species in the pericarp of black rice revealed by imaging mass spectrometry
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