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頁籤選單縮合
題名 | Absorption, Translocation and Metabolism of Butachlor by Rice Seedlings=水稻對丁基拉草(Butachlor)的吸收、輸導及代謝作用 |
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作者 | 王紓愍; 蔡文福; 張新軒; |
期刊 | 中華民國雜草學會會刊 |
出版日期 | 19950600 |
卷期 | 16:1 1995.06[民84.06] |
頁次 | 頁14-21 |
分類號 | 433.85、433.85 |
語文 | eng |
關鍵詞 | 丁基拉草; 代謝; 吸收; 谷胱苷冴; 輸導; Absorption; Butachlor; Glutathione; Glutathione s-transferase; Metabolism; Oryza sativa L.; Translocation; |
中文摘要 | 丁基拉草為臺灣使用最廣的水田殺草劑,對一年生雜草的防除有良好效果,但有 關植物對其吸收、 輸導及代謝等方面的研究尚無完整的報告。 本研究以水稻( Oryza sativa L. )品種臺農 67 號及�� C 標示的丁基拉草為材料, 測定水稻幼苗對此殺草劑的 吸收、 輸導及代謝情形。 另外, 水稻與兩種水田雜草, 稗草( Echinochloa crusgalli (L.) Beauv. )及鴨舌草( Monochoria vaginalis Presl )幼苗之非蛋白質硫醇( non-protein thiols )含量及 GST ( glutathione S-transferase )的活性大小亦加以 比較。丁基拉草容易被稻苗根部吸收,處理 24 小時後,尚有 80 %的放射活性留在根部, 僅有 20 %轉移到地上部,並且大約有 50 %被代謝為水溶性物質。經薄層色層分析結果, 最多的代謝物質為丁基拉草﹣谷胱���顗哄] butachlor-glutathione conjugate )。 稻苗 之非蛋白質硫醇含量及 GST 活性隨苗齡而改變,苗齡增加, 每株地上部之非蛋白質硫醇含 量亦增加,但以蛋白質為計算基礎之 GST 活性則下降。 水稻、稗草、及鴨舌草均含有相當 高之非蛋白質硫醇含量,但 GST 活性則以水稻最高,稗草次之,鴨舌草最低。 稗草及鴨舌 草幼苗對丁基拉草較為敏感,可能與其 GST 活性較低有關。 |
英文摘要 | Butachlor [2-chloro-N-(2,6-diethylphenyl)-N-(butoxymethyl) acetamide) is one of the most important herbicides for transplanted rice (Oryza sativa L.) weed control in Taiwan. The herbicide was readily absorbed by rice roots. During 24 hours of uptake experiment, 32% of the applied herbicide was absorbed. The pretreatment of the herbicide for 2 days did not affect the absorption. Of the absorbed herbicide, 80% remained in roots, only 20% translocated into shoots, and more than 50% was metabolized to water soluble substances. Thin layer chromatographic (TLC) analysis showed that the Rf value of the most abundant metabolite was the same as butachlor-glutathione conjugate. Rice, barnyard-grass (Echinochloa crusgalli (L.) Beauv.), and monochoria (Monochoria vaginalis Presl) seedlings contained relatively high level of non-protein thiols, while the glutathione S-transferase (GST) activity was highest in rice, barnyardgrass the next, monochloria the lowest. The difference in GST activity among these species might be related to their sensitivity to butachlor. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。