Influence of cooking and microwave heating on microstructure and mechanical properties of transgenic potatoes
- 17 June 2004
- journal article
- research article
- Published by Wiley in Molecular Nutrition & Food Research
- Vol. 48 (3), 169-176
- https://doi.org/10.1002/food.200300436
Abstract
The transgenic potato clones of cultivar Irga with improved resistance to a necrotic strain of potato virus Y (PVYN) were subjected to heat treatment in order to determine their technological quality. The technological quality was determined on the basis of differences between mechanical properties of unmodified potato and transgenic clones during cooking and microwave heating. The compression test was applied in order to evaluate the mechanical resistance of raw, cooked and microwave-treated potatoes. Compression resistance was expressed by fracture stress F (kPa), fracture strain D (mm/mm), and Young modulus E (kPa). The differences in microstructure of potato tubers (unmodified and modified) were investigated using scanning electron microscopy (SEM). The observed differentiation in the mechanical properties of heat-treated potatoes was less connected with genetic modification but most of all with a kind of the process used. The heat processes caused a distinct decrease in mechanical resistance in all the examined tubers. However, the process of microwave heating resulted in more significant changes in mechanical properties of tubers than cooking. Deformation of parenchyma cells during cooking was directly connected with starch gelatinisation and gel formation. Microwave heating affected significantly cellular water evaporation which resulted in intercellular failure, collapsing of cells, and limitation of starch gelatinisation.Keywords
This publication has 8 references indexed in Scilit:
- FULL UNIAXIAL COMPRESSION CURVES FOR PREDICTING SENSORY TEXTURE QUALITY OF COOKED POTATOESJournal of Texture Studies, 2002
- Novel Agricultural Materials for Food and Feed. The Transgenic Crops: From Cereals to PotatoPublished by Springer Science and Business Media LLC ,2002
- Compositional Analysis of Tubers from Insect and Virus Resistant Potato PlantsJournal of Agricultural and Food Chemistry, 2000
- Effects of physical properties on incidence of breakage in canned white potatoesAmerican Journal of Potato Research, 2000
- Development of the molecular methods for potato virus and viroid detection and preventionGenome, 1999
- Effects of blanching conditions on the mechanical properties of french fry stripsAmerican Journal of Potato Research, 1998
- Texture and Microstructure of Steam Cooked, Vacuum Packed PotatoesJournal of Food Science, 1998
- Effect of pre-cooking in potato granule production by a freeze-thaw processPotato Research, 1978