Metabolomics combined with chemometric tools (PCA, HCA, PLS-DA and SVM) for screening cassava (Manihot esculenta Crantz) roots during postharvest physiological deterioration

VIRGILIO GAVICHO UARROTA , Rodolfo Moresco, Bianca Coelho, Eduardo Da Costa Nunes, Luiz Augusto Martins Peruch, Enilto De Oliveira Neubert, Miguel Rocha, Marcelo Maraschin

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78 Scopus citations

Abstract

Cassava roots are an important source of dietary and industrial carbohydrates and suffer markedly from postharvest physiological deterioration (PPD). This paper deals with metabolomics combined with chemometric tools for screening the chemical and enzymatic composition in several genotypes of cassava roots during PPD. Metabolome analyses showed increases in carotenoids, flavonoids, anthocyanins, phenolics, reactive scavenging species, and enzymes (superoxide dismutase family, hydrogen peroxide, and catalase) until 3-5 days postharvest. PPD correlated negatively with phenolics and carotenoids and positively with anthocyanins and flavonoids. Chemometric tools such as principal component analysis, partial least squares discriminant analysis, and support vector machines discriminated well cassava samples and enabled a good prediction of samples. Hierarchical clustering analyses grouped samples according to their levels of PPD and chemical compositions.

Original languageEnglish
Pages (from-to)67-78
Number of pages12
JournalFood Chemistry
Volume161
DOIs
StatePublished - 15 Oct 2014

Keywords

  • Cassava
  • Chemometrics
  • Metabolomics
  • Postharvest deterioration

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