Comparative Transcriptome Profiling in a Segregating Peach Population with Contrasting Juiciness Phenotypes

Talía Del Pozo, Simón Miranda, Mauricio Latorre, Felipe Olivares, Leonardo Pavez, Ricardo Gutiérrez, Jonathan Maldonado, Patricio Hinrichsen, Bruno G. Defilippi, Ariel Orellana, Mauricio González

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Cold storage of fruit is one of the methods most commonly employed to extend the postharvest lifespan of peaches (Prunus persica (L.) Batsch). However, fruit quality in this species is affected negatively by mealiness, a physiological disorder triggered by chilling injury after long periods of exposure to low temperatures during storage and manifested mainly as a lack of juiciness, which ultimately modifies the organoleptic properties of peach fruit. The aim of this study was to identify molecular components and metabolic processes underlying mealiness in susceptible and nonsusceptible segregants. Transcriptome and qRT-PCR profiling were applied to individuals with contrasting juiciness phenotypes in a segregating F 2 population. Our results suggest that mealiness is a multiscale phenomenon, because juicy and mealy fruit display distinctive reprogramming processes affecting translational machinery and lipid, sugar, and oxidative metabolism. The candidate genes identified may be useful tools for further crop improvement.

Original languageEnglish
Pages (from-to)1598-1607
Number of pages10
JournalJournal of Agricultural and Food Chemistry
Volume67
Issue number5
DOIs
Publication statusPublished - 6 Feb 2019

Keywords

  • cold storage
  • gene expression
  • mealiness
  • Prunus persica
  • transcriptome

ASJC Scopus subject areas

  • Chemistry(all)
  • Agricultural and Biological Sciences(all)

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