摘要
[Objective] This study was to elucidate the cellular and molecular mechanism of the development of heteromorphic leaves of Populus euphratica Oliv. [Method] By employing SDS-PAGE and 2-demensional electrophoresis (2-DE) techniques,proteins in various heteromorphic leaves from the same adult tree of P. euphratica were isolated and separated to the electrophoresis technique suitable for the separation and analysis of proteins in leaves of P. euphratica tree. [Results] There were significant differences in the expressions of proteins in various heteromorphic leaves of P. euphratica tree. SDS-PAGE pattern showed that bands of proteins with molecular weight of 57.2,13.2,30.2,23.9 and 33.3 kDa were remarkably different. 2-D electrophoresis pattern presented that proteins in leaves of P. euphratica tree mainly belong to acidic proteins distributed at pH value of 5.0-6.5 and with molecular weight of 20-40 kDa; totally 73 different protein spots were observed,of which 51 were up expressed and other 22 were down expressed in the serrated ovate leaves. [Conclusion] Based on these results,we speculate that regulated gene expression in leaves of P. euphratica tree results in the generation of different shapes of leaves,in order to adapt to the surroundings better.
[目的]研究胡杨异形叶发育的细胞与分子调控机制,揭示胡杨的生态适应性。[方法]利用SDS-PAGE及2-DE技术提取及分离同一株胡杨成年树异形叶片的蛋白质,建立适合胡杨叶片蛋白质分离的电泳技术。[结果]发现异形叶蛋白质的表达存在明显差异。由SDS-PAGE图谱可以看出,分子量为57.2,13.2,30.2,23.9,35.9及33.3kDa处的蛋白谱带差异明显。双向电泳图谱表明,胡杨叶蛋白多为分布在pH值5.0～6.5,20～40kDa之间的酸性低分子量蛋白质;共发现73个差异点,其中在锯齿卵圆形叶片中表达丰度上调的为51个点,下调的为22个点。[结论]推测在长期的进化过程中,胡杨叶片基因的调控表达发生改变而长出不同形状的叶片,以更好的适应环境。
