Chemical,physical, and sensory changes in rice subjected to UV-C radiation and its acceptability to rice weevil Sitophilus oryzae (L.) (Coleoptera: Curculionidae) and humans |
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| Affiliation: | 1. Department of Agroindustrial Science and Technology, Federal University of Pelotas, 96010–900, Pelotas, RS, Brazil;2. Technological Institute in Food for Health, University of Vale do Rio dos Sinos, 93022-750, São Leopoldo, RS, Brazil;1. USDA-ARS Center for Grain and Animal Health Research, 1515 College Avenue, Manhattan, KS, 66502, USA;2. Department of Entomology, Kansas State University, Manhattan, KS, 66506, USA;1. Université d’Avignon, UMR 95 Qualisud/Laboratoire de physiologie des fruits et légumes, 301 rue Baruch de Spinoza, BP 21239, 84916 Avignon cedex, France;2. UMR 5214 Institut d’Electronique et des Systèmes, Bâtiment 5, 860 rue Saint-Priest, 34090 Montpellier cedex, France;3. Department of Biochemistry and Molecular Biology, Federal University of Ceara, Fortaleza, CE, Brazil;1. Department of Plant Sciences, Faculty of Agriculture, Rajarata University of Sri Lanka, Puliyankulama, Anuradhapura, Sri Lanka;2. Department of Agric. Biology, Faculty of Agriculture, University of Ruhuna, Mapalana, Kamburupitiya, Sri Lanka;3. Department of Biological Sciences, Faculty of Applied Sciences, Rajarata University of Sri Lanka, Mihintale, Sri Lanka;4. USDA, Agricultural Research Service, Center for Grain and Animal Health Research, 1515 College Ave., Manhattan, KS, 66052, USA |
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| Abstract: | The objective of this study was to evaluate the effect of ultraviolet C (UV–C) radiation treatment of rice on both the development of S. oryzae and changes in the quality of rice Oryza sativa (L.) (Poales: Poaceae) grains. Husked rice grains were treated with UV-C, and subsequently placed alternately with the control treatment (without UV-C) in an arena. Subsequently, 500 adult S. oryzae were placed in the center of the arena, with free access to both samples for 30 days. On the 30th day of the experiment, a greater number of adult S. oryzae were identified as consuming grains subject to the control treatment; these same S. oryzae also showed greater emergence on the 40th, 50th, and 60th day. In the group treated with UV-C, reduced acidity, protein solubility, K232, K270, luminosity, and damage were observed; however, increases in gravimetric and volumetric yields were also observed. The sensorial analysis of the cooked grains showed that grains treated with UV-C had less acceptance and purchase intention by human panelists, mainly due to the odor attribute. Further studies are still needed to identify metabolites formed in rice subjected to UV-C; however, it is noteworthy that some S. oryzae are able to recognize irradiated rice as distinct from control. |
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| Keywords: | Sensory properties Ultraviolet radiation Cooking quality Oxidation |
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