| Abstract Detail
Cell Walls Mann, Harpartap [1], Tong, Cindy [2]. Comparative enzymatic analyses of postharvest softening between apple genotypes. Fruit softening is a function of the degradation of polysaccharides of the cell wall and the middle lamella. A number of cell wall modifying enzymes are responsible for this degradation. ‘Honeycrisp’ is a unique apple cultivar which does not soften even after six months under cold storage when compared to cultivars like ‘Macoun’ which soften during storage. We hypothesize that ‘Honeycrisp’ and other genotypes that do not soften during storage lack activity of one or more cell wall modifying enzymes such as polygalacturonase, β-galactosidase, and α-L arabinofuranosidase. The activities of these enzymes have not previously been studied together and in detail during longer time storage. Eight genotypes were studied for two years. Fruit softening data was collected every 2 weeks up to 12 weeks in storage, using a texture analyzer. Activities of previously mentioned enzymes will be measured at corresponding time points in storage and relationship with fruit softening will be established.
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1 - University of Minnesota, Horticultural Science, Alderman Hall, 1970 Folwell Ave, St. Paul, MN, 55108, USA
2 - University of Minnesota, Horticultural Science
Keywords:
Apple
Fruit softening
cell wall
Beta galactosidase
alpha L furanosidase
Polygalacturonase.
Presentation Type: Plant Biology Abstract
Session: P
Location: Exhibit Hall (Northeast, Southwest & Southeast)/Hilton
Date: Sunday, July 8th, 2007
Time: 8:00 AM
Number: P17047
Abstract ID:2387 |
