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頁籤選單縮合
題名 | Plant in Response to Copper Toxicity=植物對銅毒害的反應 |
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作者 | 蔡青蒨; 王立文; 陳榮銳; Tsay, Ching-Chien; Wang, Li-Wen; Chen, Yung-Reui; |
期刊 | Taiwania |
出版日期 | 19950600 |
卷期 | 40:2 1995.06[民84.06] |
頁次 | 頁173-181 |
分類號 | 371.5 |
語文 | eng |
關鍵詞 | 銅; 毒害; 構造; 過氧化酵素; 酸性磷酸酵素; 同功酵素; Copper; Toxicity; Structure; Peroxidase; Acid phosphatase; Superoxidase; Dismutase; Isozymes; |
中文摘要 | 污染現場採集所得及買自種子店的種子萌發兩週後植株,經移栽在含不同銅溶液的培養液中兩週後,觀察植物的外表形態及進行比。長在2 μM銅濃度的植株比長在其他各種濃度者為佳,甚至比對照組好。而在檢驗的十八種植物中以五節芒(Miscanthus floridulus)及西洋石竹(Dianthus barbatus)抗性較高。一般銅的毒害造成根與莖部的生長受抑制,時間一長也會產生葉子黃化。致害在構造上而言,造成細胞外質質深、胞器的變異及膜系滲漏。電子密度高的顆粒或沈澱往往出現在細胞壁、細胞質、葉綠體及液胞上。酸性磷酸酵素及過氧化酵素在銅毒害的情況下變異顯著,可當生化指標。 |
英文摘要 | Ten-day-old seedlings germinated from seeds of tested plants obtained from commercial sources and Cu-polluted open filed were transferred to a hoagland’s soutuion containing various concentration of copper. Young plants grew better in Hoagland’s solution containing 2 μM copper than that of plain one. Among eighteen tested plants, Miscanthus floridulus and dianthus barbatus were more tolerant to excess copper. Most Cu-treated plant showed growth retardation in root and shoot, and sometimes leaf chloriosis. Structural changes of cells induced by copper toxicity were found in extracellular matrix and intracellular organelles. Breakage of membrane sytems frequently appeared in various tissues of susceptible plants. Chloroplast abnormalities occurred in leaf tissues. Electron-dense granules were found in cell wall, vacuoles, chloroplast and cytoplasm. Acid phsophatase and peroxidase are verified to be the potential markeers for the platns in response to copper stress. |
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