Journal article

Publication year: 2016

Pages: 36074-

Journal: Scientific Reports

Volume number: 6

ISSN: 2045-2322

Open access status: Gold

DOI Link: https://doi.org/10.1038/srep36074

Publisher: Nature Research

Abstract: 
High-resolution atmospheric-pressure scanning microprobe matrix-assisted laser desorption/ionization mass spectrometry imaging (AP-SMALDI MSI) at 10 mu m pixel size was performed to unravel the spatiochemical distribution of major secondary metabolites in the root of Paeonia lactiflora. The spatial distributions of two major classes of bioactive components, gallotannins and monoterpene glucosides, were investigated and visualized at the cellular level in tissue sections of P. lactiflora roots. Accordingly, other primary and secondary metabolites were imaged, including amino acids, carbohydrates, lipids and monoterpenes, indicating the capability of untargeted localization of metabolites by using high-resolution MSI platform. The employed AP-SMALDI MSI system provides significant technological advancement in the visualization of individual molecular species at the cellular level. In contrast to previous histochemical studies of tannins using unspecific staining reagents, individual gallotannin species were accurately localized and unequivocally discriminated from other phenolic components in the root tissues. High-quality ion images were obtained, providing significant clues for understanding the biosynthetic pathway of gallotannins and monoterpene glucosides and possibly helping to decipher the role of tannins in xylem cells differentiation and in the defence mechanisms of plants, as well as to investigate the interrelationship between tannins and lignins.

Harvard Citation style: Li, B., Bhandari, D., Römpp, A. and Spengler, B. (2016) High-resolution MALDI mass spectrometry imaging of gallotannins and monoterpene glucosides in the root of Paeonia lactiflora, Scientific Reports, 6, p. 36074. https://doi.org/10.1038/srep36074

APA Citation style: Li, B., Bhandari, D., Römpp, A., & Spengler, B. (2016). High-resolution MALDI mass spectrometry imaging of gallotannins and monoterpene glucosides in the root of Paeonia lactiflora. Scientific Reports. 6, 36074. https://doi.org/10.1038/srep36074