Long term storage of Abb? Fetel pears

Abb? Fetel pears harvested at two maturity stages, were stored in regular Controlled Atmosphere (CA) (3% O2 and 2% CO2), Low - O2 (0.7% O2 and 0.8% CO2), Dynamic Controlled Atmosphere (DCA) (0.4 - 0.6% O2 and 0.8% CO2) and conventional air storage. The fruit were kept in metal cabinets at -1?C and inspected after 4 and 6 months. During storage, within each picking period, ethylene production by the fruit was in the following descending order, air storage > regular CA > Low - O2 > DCA. The reverse for flesh firmness and green colour of fruit skin. Overall fruit metabolism was markedly lower in the first picking during 6 months storage period. Low - O2 and DCA fully prevented the superficial scald development at the end of each storage period (4 and 6 months) followed by shelf life. Air storage was characterized by a significant incidence of superficial scald that was reduced by regular CA. In these storage conditions a close relationship between superficial scald and increase of conjugated trienols during storage was detected, while a significantly lower content was found in Low - O2 and DCA. The lowest incidence of superficial scald was detected in the second picking. All fruit lots, except those stored in air storage, developed soft scald, a CA storage related disorder. Low - O2 and DCA promoted the highest incidence. At the end of shelf life all the fruit stored at the various conditions softened at different rates and fruit yellowing was sensibly delayed by Low - O2 and DCA. No brown core disorder was? detected. Original title, list of authors and source:INFLUENCE OF CONTROLLED ATMOSPHERE AND DYNAMIC CONTROLLED ATMOSPHERE ON PHYSIOLOGY, SCALD PREVENTION AND CA RELATED DISORDERS OF ABB? FETEL PEARS DURING LONG -TERM STORAGEFolchi, A., Bertolini, P.(*) and Mazzoni, D.paolo.bertolini@unibo.itCRIOF, Department of Agricultural Sciences, University of Bologna, Bologna, Italy CA MA 2013, XI International Controlled & Modified Atmosphere Research Conference,Trani (Italy), 3-7 June 2013The pictures are by Dr. Bertolini. ?