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首页> 外文会议>Annual Meeting of the Plant Growth Regulation Society of America >CYTOKININ AND AUXIN DISTRIBUTION EN THE CONIFER TREE CROWN
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CYTOKININ AND AUXIN DISTRIBUTION EN THE CONIFER TREE CROWN

机译：细胞素蛋白和养阴分布在针叶树冠

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A long life span is inherent in the woody life form; this is often connected with long seasonal growth interruptions during which meristems are enclosed in buds. Overwintering conifer tree buds contain leaf primordia formed in the previous growth season, and growth potential and time of release of these buds are highly predictable according to their position on the tree. Buds with comparable position and fate in different trees can thus be destructively analyzed over a range of times and treatments.Recent data and previous analyses suggest that buds contain high concentrations of auxin and cytokinins, and that adjacent buds vary greatly in a pattern that is roughly consistent with their position and growth potential. This distributional pattern could either result from differential biosynthetic and metabolic activity on site or from differential accumulation of substances synthesized elsewhere in the plant. Recent studies of auxin and cytokinin production patterns in other plants indicate that theformer alternative is the most likely. The multitude of reported auxin sources in the leader: apical bud, lateral buds, needles and stem tissues, is likely to result in a basipetal auxin gradient in the stem that might regulate the acrotonic development of branches.
机译：长寿命是在木本生命形式固有;这通常与在此期间，分生组织被封闭在芽长季节生长中断连接。越冬针叶树芽均含有形成在前面的生长期叶原基，和增长潜力，这些芽释放的时间是高度可预测的根据自己的树中的位置。在不同的树可比位置和命运芽因此可以破坏性分析的范围内的时间和treatments.Recent数据和以前的分析表明，芽含有高浓度的生长素和细胞分裂素，和使相邻的芽在大致为图案差别很大与他们的地位和发展潜力相一致。该分布式图案既可以导致差的生物合成和代谢活性在现场或从在植物别处合成物质差累积。生长素和其它植物细胞分裂素生产模式的最近的研究表明，theformer选择是最有可能的。在领导汇报生长素来源众多：顶芽，侧芽，针和茎组织，很可能会导致可能调节分支acrotonic发展杆上的basipetal生长素梯度。

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