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פותח על ידי קלירמאש פתרונות בע"מ -
Seasonal variations in cell membrane properties and long-term quality preservation of semi-dry 'Medjool' date fruit
Year:
2010
Source of publication :
Acta Horticulturae
Authors :
שומר, אילן
;
.
Volume :
877
Co-Authors:
Borochov-Neori, H., Southern Arava Research and Development, M.P. Hevel Eilot, Israel
Lutzki, B., Southern Arava Research and Development, M.P. Hevel Eilot, Israel
Judeinstein, S., Southern Arava Research and Development, M.P. Hevel Eilot, Israel
Shomer, I., Department of Food Science, ARO, Bet Dagan, Israel
Facilitators :
From page:
195
To page:
200
(
Total pages:
6
)
Abstract:
Semi-dry 'Medjool' date (Phoenix dactylifera L.) fruit (24-26% water content) has a prime economical value to the date industry in the Israeli southern Arava Valley. Excess fruit is customarily stored at-18°C for long periods with subsequent considerable damages to appearance. We have previously reported that long-term quality preservation of semi-dry 'Medjool' dates related to the level of fruit cell membrane integrity. The present study further explored the fruit cell membrane degradation process and the effects of seasonal variations on membrane integrity and fruit storage potential. High quality fruit were selected for cell membrane analysis and long-term storage studies. Cell membranes were isolated and the levels of total protein, lipid and phospholipid and of vanadate-sensitive ATPase activity were determined. Exposure of the fruit to-6 or-35°C for different periods of time confirmed the temperature dependence of membrane degradation rate. The development and extent of appearance damages paralleled membrane deterioration. Semi-dry 'Medjool' date fruit were collected on several dates along the harvest season. The levels of cell membrane constituents and activity were higher in fruit collected on early dates and declined with the progression in harvest season. Fruit storage potential was tested by placing the fruit in commercial freezers of-18 or-25°C and assessing fruit quality after a 9-months storage and a 3-weeks shelf life period. The quality of fruit harvested early in the season was maintained after storage at either-18 or-25°C, whereas, quality preservation in fruit collected late in the season was only achieved when stored at-25°C. The current study further establishes the role of fruit cell membrane integrity in quality preservation of semidry 'Medjool' date fruit during storage. The results suggest that the costs of quality preservation of semi-dry 'Medjool' dates can be reduced by adjusting long-term storage conducts to the physiological state of the fruit.
Note:
Related Files :
Appearance damages
Phoenix dactylifera
Postharvest management
Pre-harvest conditions
Storage
עוד תגיות
תוכן קשור
More details
DOI :
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
מאמר מתוך כינוס
;
.
Language:
אנגלית
Editors' remarks:
ID:
27355
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:30
Scientific Publication
Seasonal variations in cell membrane properties and long-term quality preservation of semi-dry 'Medjool' date fruit
877
Borochov-Neori, H., Southern Arava Research and Development, M.P. Hevel Eilot, Israel
Lutzki, B., Southern Arava Research and Development, M.P. Hevel Eilot, Israel
Judeinstein, S., Southern Arava Research and Development, M.P. Hevel Eilot, Israel
Shomer, I., Department of Food Science, ARO, Bet Dagan, Israel
Seasonal variations in cell membrane properties and long-term quality preservation of semi-dry 'Medjool' date fruit
Semi-dry 'Medjool' date (Phoenix dactylifera L.) fruit (24-26% water content) has a prime economical value to the date industry in the Israeli southern Arava Valley. Excess fruit is customarily stored at-18°C for long periods with subsequent considerable damages to appearance. We have previously reported that long-term quality preservation of semi-dry 'Medjool' dates related to the level of fruit cell membrane integrity. The present study further explored the fruit cell membrane degradation process and the effects of seasonal variations on membrane integrity and fruit storage potential. High quality fruit were selected for cell membrane analysis and long-term storage studies. Cell membranes were isolated and the levels of total protein, lipid and phospholipid and of vanadate-sensitive ATPase activity were determined. Exposure of the fruit to-6 or-35°C for different periods of time confirmed the temperature dependence of membrane degradation rate. The development and extent of appearance damages paralleled membrane deterioration. Semi-dry 'Medjool' date fruit were collected on several dates along the harvest season. The levels of cell membrane constituents and activity were higher in fruit collected on early dates and declined with the progression in harvest season. Fruit storage potential was tested by placing the fruit in commercial freezers of-18 or-25°C and assessing fruit quality after a 9-months storage and a 3-weeks shelf life period. The quality of fruit harvested early in the season was maintained after storage at either-18 or-25°C, whereas, quality preservation in fruit collected late in the season was only achieved when stored at-25°C. The current study further establishes the role of fruit cell membrane integrity in quality preservation of semidry 'Medjool' date fruit during storage. The results suggest that the costs of quality preservation of semi-dry 'Medjool' dates can be reduced by adjusting long-term storage conducts to the physiological state of the fruit.
Scientific Publication
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