Rice grain quality benchmarking through profiling of volatiles and metabolites in grains using gas chromatography mass spectrometry

Cindy Llorente, Rosario Jimenez, Jackie, Yariv Brotman, Alisdair R. Fernie, Nese Sreenivasulu

Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review

5 Scopus citations

Abstract

Gas chromatograph coupled with mass spectrometer is widely used to profile volatiles and metabolites from the homogenized rice flour obtained from mature grains. Rice grains consist of central endosperm which stores majorly starch and, in addition, accumulate various storage proteins as storage reserves. The outer nutritious aleurone layer stores lipids, sugar alcohols, volatiles, antioxidants, vitamins, and various micronutrients. Once paddy sample is dehulled, milled, and ground cryogenically, the brown rice flour is subjected to extraction of primary metabolites and volatiles using an appropriate extraction method. In metabolite profiling of the liquid extract obtained from the rice sample, mixture is initially subjected to methoxyamination then silylation before being subjected to untargeted metabolite profiling. Peaks obtained are processed for noise reduction and specific signal selection. Volatile compounds are initially extracted using a solid phase adsorbent prior to analysis. All these compounds, metabolites, and volatiles are detected in the mass selective detector by fragmentation at 70 eV ionization energy and the resultant mass spectrum compared with a built-in library of compounds. Data mined from the gas chromatography mass spectrometry analysis are then subjected to post-processing statistical analysis.

Original languageEnglish
Title of host publicationMethods in Molecular Biology
PublisherHumana Press Inc.
Pages187-199
Number of pages13
DOIs
StatePublished - 1 Jan 2019

Publication series

NameMethods in Molecular Biology
Volume1892
ISSN (Print)1064-3745

Keywords

  • Aroma
  • Metabolite profile analyses
  • Metabolites
  • Rice

ASJC Scopus subject areas

  • Molecular Biology
  • Genetics

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