Monitoring of extremely low oxygen control atmosphere storage of 'Greenstar' apples using chlorophyll fluorescence

A chlorophyll fluorescence-based technology to monitor low-oxygen stress during controlled atmosphere (CA) storage was tested on apples (Malus domestica Borkh. cv. Greenstar). A static CA regime of 2% oxygen was established in a CA unit for the control fruit. In two other CA units apple fruit were exposed to extremely low oxygen conditions while monitoring the fluorescence signal. The latter spiked when the oxygen level was reduced below 0.2%. The oxygen level was subsequently set to 0.4% in one CA unit and 0.7% in the other. In all CA units the temperature and CO2 levels were maintained at 1.2±0.2°C and 3%, respectively. Instrumental measurements were used to analyze quality attributes of apples at harvest and after 1, 4.5, 7 and 10 months of storage plus 0 day and 7 days of shelf life. Sensory quality was evaluated after 4.5 and 10 months of storage. After 10 months of storage, apples stored in extremely low oxygen controlled atmosphere storage had a better color retention than control fruits. The apple firmness, SSC and acidity were not affected by the storage condition. Sensory evaluation tests indicated no significant difference between the two storage conditions. Apples removed after 10 months of storage plus 7 days of shelf life were completely free of any disorder in both storage conditions. By using chlorophyll fluorescence as an effective non-destructive indicator to monitor the response of 'Greenstar' apples to extremely low oxygen conditions, it is thus possible to optimize the storage atmosphere for the specific product in a given year with maximum quality retention.

Title:	Monitoring of extremely low oxygen control atmosphere storage of 'Greenstar' apples using chlorophyll fluorescence
Authors:	Tran, Dinh T. Verlinden, Bert E. Hertog, Maarten Nicolaï, Bart M.
Keywords:	Environmental stress,Fluorescence,Malus domestica,Food quality
Issue Date:	2015
Publisher:	Elsevier
Citation:	Scopus
Abstract:	A chlorophyll fluorescence-based technology to monitor low-oxygen stress during controlled atmosphere (CA) storage was tested on apples (Malus domestica Borkh. cv. Greenstar). A static CA regime of 2% oxygen was established in a CA unit for the control fruit. In two other CA units apple fruit were exposed to extremely low oxygen conditions while monitoring the fluorescence signal. The latter spiked when the oxygen level was reduced below 0.2%. The oxygen level was subsequently set to 0.4% in one CA unit and 0.7% in the other. In all CA units the temperature and CO2 levels were maintained at 1.2±0.2°C and 3%, respectively. Instrumental measurements were used to analyze quality attributes of apples at harvest and after 1, 4.5, 7 and 10 months of storage plus 0 day and 7 days of shelf life. Sensory quality was evaluated after 4.5 and 10 months of storage. After 10 months of storage, apples stored in extremely low oxygen controlled atmosphere storage had a better color retention than control fruits. The apple firmness, SSC and acidity were not affected by the storage condition. Sensory evaluation tests indicated no significant difference between the two storage conditions. Apples removed after 10 months of storage plus 7 days of shelf life were completely free of any disorder in both storage conditions. By using chlorophyll fluorescence as an effective non-destructive indicator to monitor the response of 'Greenstar' apples to extremely low oxygen conditions, it is thus possible to optimize the storage atmosphere for the specific product in a given year with maximum quality retention.
Description:	Scientia Horticulturae, Volume 184, March 05, 2015, Pages 18-22
URI:	http://www.sciencedirect.com/science/article/pii/S0304423814006347 http://repository.vnu.edu.vn/handle/VNU_123/32529
ISSN:	03044238
Appears in Collections:	Bài báo của ĐHQGHN trong Scopus