UTILIZATION OF CHILLPEACH MICROARRAY PLATFORM FOR COMPARING CHILLING INJURY-SUSCEPTIBLE 'HERMOZA' AND CHILLING INJURY-RESISTANT 'ODED' PEACHES
Transcriptomic analyses of two peach cultivars, which differ in their resistance to chilling injury, were examined after 2 weeks of cold storage at 5°C by utilizing the ChillPeach cDNA microarray platform. Both cultivars are white-, melting-flesh, however Oded (Prunus persica Oded), is a cling-stone, early season peach while Hermoza (P. persica Hermoza), is a free-stone, mid-season cultivar. Chilling injury symptoms of flesh browning, woolly texture and flesh bleeding were lower in Oded fruits than in Hermoza fruits after cold storage at 5°C, indicating that Oded is more resistant to chilling injury. In cold-stored Hermoza peaches, the expression level of selected genes involved in ethylene biosynthesis and its perception and signal transduction was lower than cold-stored Oded peaches. In addition, the expression level of genes related to cell wall degradation, stress response and various transcription factor families (e.g., NAC, HD-ZIP and AP2/EREBP) was higher in cold-stored Oded peaches than Hermoza peaches. Overall, the results suggest that resistance to chilling injury in peaches is associated with ethylene pathway, stress tolerance, synthesis of cell wall degrading enzymes and transcription factors.
Dagar, A., Friedman, H., Lurie, S., Crisosto, C.H., Ibanez, C.M., Puig , C.P. and Granell, A. (2012). UTILIZATION OF CHILLPEACH MICROARRAY PLATFORM FOR COMPARING CHILLING INJURY-SUSCEPTIBLE 'HERMOZA' AND CHILLING INJURY-RESISTANT 'ODED' PEACHES. Acta Hortic. 945, 337-343
peach, chilling injury, microarray