Co-Authors:
Pangallo, S., Dipartimento di Agraria Università Mediterranea di Reggio Calabria Località Feo di Vito Reggio Calabria 89122 Italy
Li Destri Nicosia, M.G., Dipartimento di Agraria Università Mediterranea di Reggio Calabria Località Feo di Vito Reggio Calabria 89122 Italy
Raphael, G., Department of Postharvest Science ARO The Volcani Center PO Box 6 Bet Dagan 50250 Israel
Levin, E., Department of Postharvest Science ARO The Volcani Center PO Box 6 Bet Dagan 50250 Israel
Ballistreri, G., Consiglio per la ricerca in agricoltura e l'analisi dell'economia agraria (CREA) - Centro di Ricerca per l'Agrumicoltura e le Colture Mediterranee Corso Savoia 190 Acireale (CT) 95024 Italy
Cacciola, S.O., Dipartimento di Agricoltura Alimentazione e Ambiente Università degli Studi Via S. Sofia 100 95123 Catania Italy
Rapisarda, P., Consiglio per la ricerca in agricoltura e l'analisi dell'economia agraria (CREA) - Centro di Ricerca per l'Agrumicoltura e le Colture Mediterranee Corso Savoia 190 Acireale (CT) 95024 Italy
Droby, S., Department of Postharvest Science ARO The Volcani Center PO Box 6 Bet Dagan 50250 Israel
Schena, L., Dipartimento di Agraria Università Mediterranea di Reggio Calabria Località Feo di Vito Reggio Calabria 89122 Italy
Pangallo, S., Dipartimento di Agraria, Università Mediterranea di Reggio Calabria, Località Feo di Vito, Reggio Calabria, Italy
Li Destri Nicosia, M.G., Dipartimento di Agraria, Università Mediterranea di Reggio Calabria, Località Feo di Vito, Reggio Calabria, Italy
Raphael, G., Department of Postharvest Science, ARO, The Volcani Center, PO Box 6, Bet Dagan, Israel
Levin, E., Department of Postharvest Science, ARO, The Volcani Center, PO Box 6, Bet Dagan, Israel
Ballistreri, G., Consiglio per la ricerca in agricoltura e l'analisi dell'economia agraria (CREA) – Centro di Ricerca per l'Agrumicoltura e le Colture Mediterranee, Corso Savoia 190, Acireale (CT), Italy
Cacciola, S.O., Dipartimento di Agricoltura, Alimentazione e Ambiente, Università degli Studi, Via S. Sofia 100, Catania, Italy
Rapisarda, P., Consiglio per la ricerca in agricoltura e l'analisi dell'economia agraria (CREA) – Centro di Ricerca per l'Agrumicoltura e le Colture Mediterranee, Corso Savoia 190, Acireale (CT), Italy
Droby, S., Department of Postharvest Science, ARO, The Volcani Center, PO Box 6, Bet Dagan, Israel
Schena, L., Dipartimento di Agraria, Università Mediterranea di Reggio Calabria, Località Feo di Vito, Reggio Calabria, Italy
Abstract:
The defence responses of grapefruit and lemon to treatment with pomegranate extract (PGE) were investigated. PGE, an alcoholic extract from pomegranate peel, was recently proposed as a means of effective alternative control against postharvest rots. In in vivo experiments, a significant reduction of rots caused by Penicillium digitatum and P. italicum was achieved on artificially inoculated fruits without direct contact between PGE and pathogens. On lemons both pathogens were completely inhibited by PGE at 12 g dry matter L-1 applied 12 and 24 h before the pathogen but a significant reduction of rots was also achieved by inoculating the pathogen immediately after PGE (0 h), indicating a very quick activation of defence responses. Lower, but significant, reductions were also obtained on grapefruits. An increase in reactive oxygen species (ROS) activity, reaching its peak after 24 h, was observed, in agreement with in vivo efficacy trials. Similarly, the expression of five genes involved in activation of defence responses in plants (CHI, CHS, MAPK, MAPKK and PAL) increased following PGE application. Based on the results of the present study, the high efficacy demonstrated for PGE in previous studies can be partially attributed to the induction of resistance in host tissues. © 2016 British Society for Plant Pathology.
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