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題 名 | Cadmium-Binding Polypeptides in Cadmium-Treated Zinnia=鎘處理百日草內鎘結合多胜 |
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作 者 | 蔡青蒨; 馬筱筠; 陳榮銳; | 書刊名 | Taiwania |
卷 期 | 47:1 2002.03[民91.03] |
頁 次 | 頁11-23 |
分類號 | 377.2215 |
關鍵詞 | 鎘; 麩胱甘太; 植物螫合物; 硫氫基; 百日草; Cadmium; Glutathione; Phytochelatins; Sulfurhydryl group; Zinnia elegans; |
語 文 | 英文(English) |
DOI | 10.6165/tai.2002.47(1).11 |
中文摘要 | 五週大的百日草幼苗,以水耕法施以 10 贡M 鎘濃度的先處理一週後,移植於含 45 贡M 鎘的營養液下處理。在不同的處理時間下,分別收集經前處理及單一的 45 贡M 處理的植株進行測試。在高效能液態色層分析圖譜的比較下,有經先處理的植株含較多的氫硫化合物及麩胱甘太,而且在七個波峰的氫硫化合物中的第三和第四波峰在處理 24 小時內遞增至最高,隨後而遞減,在 96 小時時恢復原來的濃度。進一步分離與鑑定低分子與高分子複合物所用的材料都用先處理者。植物的萃取液經 DE 52 的離子交換和 Sephadex-50 膠體過濾柱型色層分析,取得的兩個層析分別是高分子與低分子鎘結合復合物。低分子鎘結合復合物在高效能液態色層分析圖譜中顯示兩個波峰,氨基酸分析儀鑑定兩著所占有的組氨酸量高達 90 % 以上,且其滯留時間比麩胱甘太短。高分子鎘結合複合物則顯示有七個波峰,除第一波峰含有的組氨酸高達 85 % 外,其餘波峰所含的組氨酸都在 0.1 % 以下,植物螯合物中麩氨酸/甘氨酸的比例分別為 3 和 4。 |
英文摘要 | Five-week-old seedlings of Zinnia elegans were hydroponically cultured in Hoagland's solution containing 45 贡M Cd2+ with or without one week of prior exposure to 10 贡M Cd2+. Profiles of HPLC indicated that plants previously exposed to 10 贡M Cd2+ developed more sulfurhydryl groups and glutathione than plants not exposed to that prior treatment. Individual peaks of sulfurhydryl groups displayed a prominent increase at 24 h, following by a gradual decrease to initial levels of sulfurhydryl after 96 h. Further isolation and purification of metal-binding complexes was done using DE 52, Sephadex, and HPLC chromatographic separations. Two fractions of the LMW complex contained more than 90% of the histidine-like substance in total amino acids. The HMW complex had five peaks in the HPLC profile. One major peak contained more than 85% of the histidine-like substance, whereas other peaks contained less than 0.1% of the histidine, along with phytochelatins with n number 3 and 4. |
本系統中英文摘要資訊取自各篇刊載內容。