Non-structural Carbohydrate Metabolism in the Flesh of Stone Fruits of the Genus Prunus (Rosaceae) - A Review.

Robert P Walker,Alberto Battistelli,María V Lara,Franco Famiani,Rachele Falchi,María F Drincovich,Giannina Vizzotto,Claudio Bonghi,Stefano Moscatello

doi:10.3389/fpls.2020.549921

Abstract

Non-structural carbohydrates are abundant constituents of the ripe flesh of all stone fruits. The bulk of their content comprises sucrose, glucose, fructose and sorbitol. However, the abundance of each of these carbohydrates in the flesh differs between species, and also with its stage of development. In this article the import, subcellular compartmentation, contents, metabolism and functions of non-structural carbohydrates in the flesh of commercially cultivated stone fruits of the family Rosaceae are reviewed.

Highlights

The term stone fruits refers to a number of species that are trees belonging to the genus Prunus of the rose family (Rosaceae), that are characterized by fruits which possess a lignified endocarp called the stone or pit
A feature of many sink tissues is the presence of enzymes that degrade sucrose together with enzymes involved in sucrose synthesis (SPS and potentially sucrose synthase (SuSy)), and in some of these tissues a cycle of sucrose synthesis and breakdown occurs. One function of this cycle could be in sucrose breakdown and re-synthesis associated with turgor regulation (Rossouw et al, 2010; Li et al, 2012, 2016, 2018), and in the flesh of stone fruits it is possible that one function of sucrose phosphate synthase (SPS) is in this process
From the foregoing, it is clear that the work of a large number of people over several decades has resulted in an impressive understanding of non-structural carbohydrate metabolism in the flesh of stone fruits

Summary

INTRODUCTION

The term stone fruits refers to a number of species that are trees belonging to the genus Prunus of the rose family (Rosaceae), that are characterized by fruits which possess a lignified endocarp called the stone or pit. In the ripe flesh and skin of all stone fruits differing amounts of sucrose, glucose, fructose and sorbitol account for the bulk of the sugar content, and little or no starch is present (Table 1; Pavel and DeJong, 1993b; Moing et al, 1998; Desnoues et al, 2014, 2018; Baldicchi et al, 2015; Cirilli et al, 2016). Plant neutral invertase family protein Plant neutral invertase family protein CINV2 Plant neutral invertase family protein alkaline/neutral invertase S CINV2 ATBETAFRUCT4, VAC-INV ATCWINV1, ATBFRUCT1 ATCWINV1, ATBFRUCT1 ATBETAFRUCT4, VAC-INV INV-E, At-A/N-InvE Plant neutral invertase family protein

References transcripts analysis

Findings

CONCLUSION