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題 名 | A Stress-inducible Protein Associated with Desiccation in Lily Pollen=百合花粉一與乾燥有關之逆境誘發蛋白 |
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作 者 | 王國祥; 林淑美; 魏孝倫; | 書刊名 | Botanical Bulletin of Academia Sinica |
卷 期 | 40:3 1999.07[民88.07] |
頁 次 | 頁199-205 |
分類號 | 435.456 |
關鍵詞 | 乾燥; 百合; 花粉蛋白; 逆境誘發; Desiccation; Lilium longiflorum; Pollen protein; Stress-inducible; |
語 文 | 英文(English) |
中文摘要 | 本實驗分析百合 (Lilium long 伊 orum Thunb.cv. 雪后 ) 花粉中一與乾燥失水有關的逆境誘發蛋白(LLA) 。花粉蛋白之雙向電泳及免疫轉潰分析顯示 LLA-32 是具有多型,等電點為 5.6 , 分子量為 32kDa 的 多腔太。此花粉蛋白在花藥發育的過程中,只在花粉成熟的晚期才累積表現。花粉成熟以後江 A-32 蛋白 的量仍維持一定,但是當花粉萌發四小時後 ,LLA-32 蛋白即消失。花粉蛋白經次細胞分離的實驗顯示LLAu32 蛋白是位於花粉的細胞質內。將發育中的花粉先行乾燥處理可証明此蛋白確與乾燥有關。江 AJ2 doublet 蛋白的累積可經由外加 methyljaSInmate 、 Salicyilic acid 、 mannitol 和 methyl viologen 等方式來加以 操控。 LLA-32doublet 受乾燥和其他逆境而有不同程度的累積。 LLA-32doublet 的一個多腔太受乾燥影響而 明顯增加 ;LLA-32doublet 的另一個多腔太則受其他逆境的影響明顯增加。 |
英文摘要 | This work characterizes a stress-inducible protein (LLA) associated with desiccation in lily (Lilium longiflorum Thunb. cv Snow Queen) pollen. Immunoblots of two-dimensional polyacrylamide gels of pollen protein indicated that the LLA-32 protein with a molecular mass of 32 kDa was heterogeneous and had an isoelectric point of 5.6. The protein was developmentally regulated at the later stage of pollen maturation during anther development. The accumulation of LLA-32 proteins remained steady in the mature pollen, but the protein disappeared during pollen germination. Subcellular fractionation of pollen proteins revealed that the protein was detected only in the cytoplasmic fraction, indicative of a gametophytic origin. Premature drying of developing pollen demonstrated that the LLA-32 doublet was associated with desiccation. The accumulation of the proteins can be experimentally manipulated by methyl jasmonate and salicylic acid as well as by mannitol and methyl viologen. Differential accumulation of the doublet polypeptides occurred with response to various stimuli. The upper band of LLA-32 doublet polypeptides markedly accumulated upon dehydration whereas the lower band of LLA-32 doublet significantly increased its level of accumulation when other stresses were applied. |
本系統中英文摘要資訊取自各篇刊載內容。