Proteomics and metabolomics analysis of Cormus domestica (L.) fruits and the valorisation of an ethnobotanical heritage of culinary and medicinal uses in Mediterranean area.

Author:

Tartaglia Maria1,Zuzolo Daniela1,Prigioniero Antonello1,Ranauda Maria Antonietta1,Scarano Pierpaolo1,Tienda-Parrilla Marta2,Hernandez Tamara2,Jorrín-Novo Jesús2,Guarino Carmine1

Affiliation:

1. Department of Science and Technology, University of Sannio, via de Sanctis snc, 82100 Benevento

2. Agroforestry and Plant Biochemistry, Proteomics and Systems Biology, Department of Biochemistry and Molecular Biology, University of Cordoba, UCO-CeiA3, 14014, Cordoba

Abstract

Abstract Background Cormus domestica (L.) is a monophyletic wild fruit tree belonging to the Rosaceae family, with well-documented use in the Mediterranean region. Traditionally, these fruits are harvested and stored for at least 2 weeks before consumption. During this period, the fruit reaches its well-known and peculiar organoleptic and texture characteristics. However, the spread of more profitable fruit tree species, resulted in its progressive erosion. In this work we performed proteomic and metabolomic fruit analyses at three times after harvesting to provide data on its chemical composition, nutritional and nutraceutical properties. Results Proteomic and metabolomic analyses were performed at three ripening stages: freshly harvested fruit (T0), fruit two weeks after harvest (T1) and fruit four weeks after harvest (T2). Proteomic analysis (Shotgun Proteomic in LC-MS/MS) resulted in 643 proteins identified. Most of the differentially abundant proteins between the three phases observed were involved in the softening process, carbohydrate metabolism and stress responses. Enzymes, such as xyloglucan endotransglucosylase/hydrolase, pectin acetylesterase, beta-galactosidase and pectinesterase, accumulated during fruit ripening and could explain the pulp breakdown observed in C. domestica. At the same time, enzymes abundant in the early stages (T0), such as sucrose synthase and malic enzyme, explain the accumulation of sugars and the lowering of acidity during the process. The metabolites extraction from C. domestica fruits enabled the identification of 606 statistically significant differentially abundant metabolites. Some compounds such as piptamine and resorcinol, well-known for their antimicrobial and antifungal properties, and several bioactive compounds such as endocannabinoids, usually described in the leaves, accumulate in C.domestica fruit during the post-harvest process. Conclusions The C. domestica fruit metabolomic and proteomic profiling during the post-harvest process showed in the study, fills an information gap and has enabled the molecular and phytochemical characterisation of this erosion-endangered fruit. Data support the nutritional and nutraceutical value of this species.

Publisher

Research Square Platform LLC

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