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題 名 | 光照與pH值對發芽米GABA、抗氧化物含量及活性之影響=GABA and Antioxidants Contents and Their Activities in Germinated Brown Rice under Treatments of Different Light Sources and pH |
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作 者 | 張雅琪; 吳志文; 林素汝; | 書刊名 | 作物、環境與生物資訊 |
卷 期 | 10:2 2013.06[民102.06] |
頁 次 | 頁85-97 |
分類號 | 434.111 |
關鍵詞 | 發芽米; r-胺基丁酸; DPPH自由基清除能力; 總酚; 類黃酮; Germinated brown rice; r-aminobutyric acid; GABA; DPPH radical scavenging activity; Total phenolics; Flavonoids; |
語 文 | 中文(Chinese) |
中文摘要 | 大多數作物的γ-胺基丁酸(GABA)與抗氧化物的生合成,主要是藉由逆境的刺激。本研究旨在將2011年第一期作收穫之8個臺灣稻種之糙米進行不同光源照射與pH 值溶液浸泡處理,據以探討發芽米中GABA含量、DPPH自由基清除能力、總酚及類黃酮含量之變化。結果顯示,糙米發芽過程以紫外光或遠紅外光照射並以pH 6.5的純水浸泡可有效地提高GABA含量,以臺農78號及臺秈2 號兩水稻品種有較多的含量。多數稻種糙米發芽過程以不同光源照射或pH值溶液浸泡處理後,發芽米DPPH 自由基能力與類黃酮含量無顯著的變化(P > 0.05),但以遠紅外光照射輔以pH 5.5溶液浸泡可提升發芽米DPPH自由基清除能力;紫外光照射輔以pH 5.5溶液浸泡處理可維持較高的總酚含量;紫外光照射輔以不同pH 值溶液浸泡處理會降低類黃酮含量。發芽米DPPH自由基能力與成分較佳的稻種為臺農78號與高雄147號。 |
英文摘要 | The biosyntheses of γ-aminobutyric acid (GABA) and antioxidants are mainly induced by adverse conditions in most crops. This study selected brown rice of eight varieties bred in Taiwan that produced in first crop of 2011. The tested materials were subjected to treatments of different light sources and pH buffer solutions, and the germinated brown rice were analyzed to determine changes in contents of GABA, total phenolics and flavonoids as well as DPPH radical scavenging activity. Results showed that GABA content of germinated brown rice was increased by the uses of ultraviolet (UV) and far-infrared (FIR) radiation combined with immersion in a pH 6.5 solution treatment during the germination process of brown rice, particularly in cultivars 'TNG78' and 'TS2'. Most brown rice varieties treated with different light sources or pH buffer solutions during germination showed no significant differences (P < 0.05) in DPPH radical scavenging activity and flavonoids content. However, by FIR radiation plus immersion in a pH 5.5 solution treatment would increase DPPH radical scavenging activity. With both UV radiation and immersion in a pH 5.5 solution treatment would promote higher total phenolics content relative to other treatments, while it would decrease flavonoids content when UV radiation was joined with other buffer solutions. Among the tested samples of germinated brown rice, 'TNG78' and 'KH147' showed better DPPH radical scavenging activity and higher antioxidants content. |
本系統中英文摘要資訊取自各篇刊載內容。