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題 名 | 生長調節劑對百慕達草(Cynodon spp.)生長及植被顏色之影響=Effect of Plant Growth Regulators on the Growth and Vegetation Color of Bermudagrass (Cynodon spp.) |
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作 者 | 陳盈中; 侯金日; | 書刊名 | 作物、環境與生物資訊 |
卷 期 | 6:1 2009.03[民98.03] |
頁 次 | 頁1-14 |
分類號 | 434.23 |
關鍵詞 | 百慕達草; 植物生長調節劑; 植被顏色; 剪草; Bermudagrass; Vegetation color; Plant growth regulators; Cutting; |
語 文 | 中文(Chinese) |
中文摘要 | 摘要 豆科植物因為組織的再生能力,或農桿菌的感染效果不好,使其利用農桿菌基因轉殖的效 率不佳。紅豆上胚軸農桿菌基因轉殖系統,由於胚軸黃化及壞死情形嚴重,導致基因轉殖效率 降低。農桿菌EHA105- pCAMBIA1201 對紅豆高雄6、8、9 號的GUS 基因轉殖效率相當,在 高雄7 號的GUS 表現不佳。農桿菌LBA4404 及KYRT1,因為GUS 表現差或過度引起組織黃 化,所以並不適合用在紅豆上胚軸農桿菌基因轉殖。使用組織化學染色及影像處理軟體,分析 胚軸切面細胞超氧陰離子、H2O2 及木質素的累積,發現黃化現象與這些因子有關,而且H2O2 的釋放呈現雙相。細胞膜NADPH 氧化? 抑制劑DPI (0.5 M),可以提昇胚軸切面細胞GUS 基因的表現1.96 倍,並降低H2O2 與超氧陰離子的累積,分別達43%及16%,但是DPI 對細胞 黃化減輕的能力有限。有關DPI 在紅豆胚軸農桿菌基因轉殖的功能以及作用機制,須要進一步 探討。 |
英文摘要 | ABSTRACT The most commonly transformation method for legumes is based on infection by Agrobacterium tumefaciens. However, tissue necrosis and cell death are seriously problems for the success of gene transfer. The A. tumefaciens strains EHA105, LBA4404, and KYRT1 harboring the binary plasmid pCAMBIA1201 were used in the studies on Agrobacterium-mediated gene transfer in azuki bean. Azuki bean cultivar KS7 showed much lower GUS gene expression while others (KS6, 8, and 9) expressed better having almost equivalent transformation efficiency in epicotyls explants. LBA4404 and KYRT1 may not suitable for azuki bean transformation due to low GUS expression or high tissue browning. Results of histochemical detection and image analysis for reactive oxygen species (ROS), superoxide and hydrogen peroxide and lignin accumulation in these necrotic cells revealed that tissue browning was partly affected by ROS production. Hydrogen peroxide production was a biphasic response during co-clutivation. Diphenylene iodonium (DPI), a specific inhibitor for flavoenzymes such as NAD(P)H oxidase, was tested for its possible function in improvement of Agrobacterium- mediated azuki bean gene transfer. In general, tissue browning was improved slightly, GUS gene expression was increased by 1.96-fold in DPI (0.5 M) treated explants and H2O2 and superoxide accumulation was reduced by 43% and 16% respectively. Further investigations are necessary for the possible mechanism and useful theory of DPI in Agrobacterium-mediated azuki bean gene transfer. |
本系統中英文摘要資訊取自各篇刊載內容。