Effect of peeling and unpeeling on yield,chemical structure,morphology and pasting properties of starch extracted from three diverse potato cultivars of Pakistan |
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| Authors: | Asad Nawaz Shinawar Waseem Ali Sana Irshad Fatima Irshad Aftab Ahmed Zainab Sharmeen Imran Khan |
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| Affiliation: | 1. Co-Innovation Center for Modern Production Technology of Grain Crops, Yangzhou University, Yangzhou, 225009 China;2. Institute of Agricultural Sciences, University of the Punjab, Quaid-e-Azam Campus, Lahore, 54590 Pakistan;3. School of Environmental Studies, China University of Geo Sciences, Wuhan, 430074 China;4. Department of Mathematics, University of Education, Lahore Campus, Lahore, 54660 Pakistan;5. Institute of Diet and Nutritional Sciences, Faculty of Allied Health Sciences, The University of Lahore, 54000 Lahore, Pakistan |
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| Abstract: | The current study investigates the comparison and quality characteristics of starches isolated from potatoes using different processing methods from three commercial varieties: Lady Rosetta, Asterix and Challenger, for the first time in Pakistan. The analysis of variance revealed that starch yield significantly (P < 0.05) depended on total solids, peeling (12.7%, 12.0% and 12.0%) and unpeeling (15.0%, 14.0% and 14.0%) of potatoes compared to potato varieties for Lady Rosetta, Challenger and Asterix, respectively. Moreover, pasting properties, protein content, redness and yellowness were increased in those starches isolated without peeling while carbohydrates and lightness were increased in peeled potato starches. Furthermore, Fourier-transform infrared spectroscopy analysis revealed that protein (1200–1400 cm−1) was present in starch extracted without peeling. Besides, scanning electron microscopy analysis revealed oval-shaped starch granules with no impurities in peeled potato starch. The findings suggest the suitability of peeling process for obtaining a high-quality pure starch. |
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| Keywords: | Fourier-transform infrared spectroscopy peeled and unpeeled potato potato starch rapid visco analyser scanning electron microscopy |
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