Optimisation of phytate degradation in whole grain rice during germination processing using response surface methodology
Phytic acid (IP6), stored in seeds as metal salts known as phytates, binds to micronutrients and prevents its absorption by the human body. The germination process could improve cereal nutritional values by stimulating endogenous phytase activity and promoting phytate degradation. This study evaluat...
| Main Authors: | , , , , , |
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| Format: | Article |
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UNIMAS Publisher
2023
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| Online Access: | http://psasir.upm.edu.my/id/eprint/110540/ |
| _version_ | 1848865543484866560 |
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| author | Huei-Hong, Lee Elisha, Yiu Alvin-Lim-Teik, Zheng Joseph-Choon-Fah, Bong Su-Peng, Loh Yiu, Pang Hung |
| author_facet | Huei-Hong, Lee Elisha, Yiu Alvin-Lim-Teik, Zheng Joseph-Choon-Fah, Bong Su-Peng, Loh Yiu, Pang Hung |
| author_sort | Huei-Hong, Lee |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | Phytic acid (IP6), stored in seeds as metal salts known as phytates, binds to micronutrients and prevents its absorption by the human body. The germination process could improve cereal nutritional values by stimulating endogenous phytase activity and promoting phytate degradation. This study evaluated the physicochemical changes of phytates in rice cultivars with different IP6 contents, followed by optimisation of phytate degradation using response surface modeling. The magnitude of changes in IP6 content and phytase activity differed among rice cultivars. This suggested that the efficiency of germination treatments relied on the amount of natural phytic acid and phytase activity present in the rice grains. The cultivar “Tuan” was then selected and studied for the germination effect on phytate degradation using a central composite design. The cultivar gave a lower IP6 content, enhanced phytase activity and improved minerals bioaccessibility under acidic conditions. Acidic germination facilitated the degradation of phytate complexes in whole grain rice by making phytate complexes more soluble, accelerating phytase activity and thus, releasing mineral micronutrients from phytate globoids. The optimum germination condition was identified at pH 2.7, 25 °C over 12 h. In conclusion, germination processing facilitated phytate degradation in whole grain rice to make value-added rice products with low phytic acid and good mineral bioaccessibility. |
| first_indexed | 2025-11-15T14:06:23Z |
| format | Article |
| id | upm-110540 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-15T14:06:23Z |
| publishDate | 2023 |
| publisher | UNIMAS Publisher |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-1105402024-05-15T23:41:23Z http://psasir.upm.edu.my/id/eprint/110540/ Optimisation of phytate degradation in whole grain rice during germination processing using response surface methodology Huei-Hong, Lee Elisha, Yiu Alvin-Lim-Teik, Zheng Joseph-Choon-Fah, Bong Su-Peng, Loh Yiu, Pang Hung Phytic acid (IP6), stored in seeds as metal salts known as phytates, binds to micronutrients and prevents its absorption by the human body. The germination process could improve cereal nutritional values by stimulating endogenous phytase activity and promoting phytate degradation. This study evaluated the physicochemical changes of phytates in rice cultivars with different IP6 contents, followed by optimisation of phytate degradation using response surface modeling. The magnitude of changes in IP6 content and phytase activity differed among rice cultivars. This suggested that the efficiency of germination treatments relied on the amount of natural phytic acid and phytase activity present in the rice grains. The cultivar “Tuan” was then selected and studied for the germination effect on phytate degradation using a central composite design. The cultivar gave a lower IP6 content, enhanced phytase activity and improved minerals bioaccessibility under acidic conditions. Acidic germination facilitated the degradation of phytate complexes in whole grain rice by making phytate complexes more soluble, accelerating phytase activity and thus, releasing mineral micronutrients from phytate globoids. The optimum germination condition was identified at pH 2.7, 25 °C over 12 h. In conclusion, germination processing facilitated phytate degradation in whole grain rice to make value-added rice products with low phytic acid and good mineral bioaccessibility. UNIMAS Publisher 2023 Article PeerReviewed Huei-Hong, Lee and Elisha, Yiu and Alvin-Lim-Teik, Zheng and Joseph-Choon-Fah, Bong and Su-Peng, Loh and Yiu, Pang Hung (2023) Optimisation of phytate degradation in whole grain rice during germination processing using response surface methodology. Borneo Journal of Resource Science and Technology, 13 (2). pp. 132-141. ISSN 2229-9769; ESSN: 0128-2972 https://publisher.unimas.my/ojs/index.php/BJRST/article/view/5347 10.33736/bjrst.5347.2023 |
| spellingShingle | Huei-Hong, Lee Elisha, Yiu Alvin-Lim-Teik, Zheng Joseph-Choon-Fah, Bong Su-Peng, Loh Yiu, Pang Hung Optimisation of phytate degradation in whole grain rice during germination processing using response surface methodology |
| title | Optimisation of phytate degradation in whole grain rice during germination processing using response surface methodology |
| title_full | Optimisation of phytate degradation in whole grain rice during germination processing using response surface methodology |
| title_fullStr | Optimisation of phytate degradation in whole grain rice during germination processing using response surface methodology |
| title_full_unstemmed | Optimisation of phytate degradation in whole grain rice during germination processing using response surface methodology |
| title_short | Optimisation of phytate degradation in whole grain rice during germination processing using response surface methodology |
| title_sort | optimisation of phytate degradation in whole grain rice during germination processing using response surface methodology |
| url | http://psasir.upm.edu.my/id/eprint/110540/ http://psasir.upm.edu.my/id/eprint/110540/ http://psasir.upm.edu.my/id/eprint/110540/ |