Many species of chili peppers have overlapping morphological characters and delimitation by visual descriptors in many cases fails to differentiate one species from another. In Peru, there are 413 accessions of native chili pepper and 296 accessions of rocotos conserved in the Germplasm Collections of the National Institute of Agrarian Innovation (INIA), of which five accessions (three species from three locations) were selected for the present metabolomic study. The Discrimination of the three species of native chili peppers and identification of biomarkers was performed using untargeted metabolomic approach based on profiling by UHPLC-HRMS and multivariate data analysis. The samples of fresh chili peppers (whole fruit) from Chincha area were used to construct an OPLS-DA model. To validate the biomarkers (identified 15 biomarkers, mainly flavonoids), an external validation set of the OP...

“Kañiwa" (Chenopodium pallidicaule Aellen) is a very nutritious Andean grain characterized by its high protein content and good amino acid profile. The diversity of this species has been characterized by agro-morphological and genomic studies, which are not completely efficient to discriminate between accessions and varieties. Metabolomics is currently used as an additional tool for species delimitation. In this sense, in the present work a nontargeted metabolomic analysis of two varieties of kañiwa (“Ramis” and “Chilliwa”) from the department of Puno, Peru was carried out. For the analysis, ultra-high performance liquid chromatography coupled to high resolution mass spectrometry with Orbitrap analyzer (UHPLC-HRMS) was used. The MSDIAL and MSFINDER software were used to identify the metabolites. The chemical profiles obtained were summarized in a single table for statistical ...

A SCREENING OF 24 CHUNCHO CACAO POSTHARVEST PROCESSES WAS CARRIED OUT AND THREE TREATMENTS WERE IDENTIFIED WITH THE BEST LEVELS OF FUNCTIONAL NON-VOLATILE METABOLITES AND THE BEST PROFILE OF VOLATILE METABOLITES. THE RELATIONSHIP BETWEEN THE SENSORY PROFILE OF FLAVOR AND AROMA, VOLATILE AND NON-VOLATILE METABOLITES WAS INVESTIGATED BY MULTIBLOCK ANALYSIS. THE MOST PROMINENT VOLATILE METABOLITES WERE BENZALDEHYDE (BZ), 2,3,5-TRIMETHYLPYRAZINE (TRIMP), 2,3,5,6-TETRAMETHYLPYRAZINE (TETRAMP), MYRCENE (MYR), LIMONENE (LM), ETHYLPHENYL ACETATE (EPHAC) AND 2-PHENYLETHYL ACETATE (PHETHAC), AND FUNCTIONAL NONVOLATILE METABOLITES WERE TOTAL FLAVONOIDS (TFLAV), TOTAL POLYPHENOLS (TPPH), CATECHINS (CAT), EPICATECHIN (EPCAT), CAFFEINE (CAF), AND THEOBROMINE (TEOB). SENSORY ANALYSIS BY MFA (MULTIPLE FACTORIAL ANALYSIS) ALLOWED CHECKING THE SUBSTRATES OF THE METABOLITES AND HIGHLIGHTING CORRELATED FLAV...

El fruto del Vaccinium floribundum Kunth “pushgay”, integra al grupo de los berries nativos, el cual presenta una gran cantidad de antioxidantes, mucho mayor que los arándanos que actualmente se exportan a diferentes países. El objetivo de este estudio fue la determinación de los parámetros fisicoquímicos y la capacidad antioxidante in vitro del extracto vegetal del Vaccinium floribundum Kunth. Se prepararon extractos por maceración a partir de frutos liofilizados, usando como solvente etanol al 50 %, 70 % y 96 %. Los extractos presentaron valores similares de densidad relativa, sólidos totales, índice de refracción, grados Brix y pH. El tamizaje fitoquímico evidenció la presencia de carbohidratos, azúcares reductores, taninos, compuestos amino y heterósidos, destacando los compuestos fenólicos y flavonoides de relevante capacidad antioxidante. El extracto al 50 % prese...