Regulation of source/sink relations by cytokinins
Regulation of source/sink relations by cytokinins
复制标题
DOI：
10.1023/a:1010781500705
复制
发表时间：
2000-11-01
影响因子：
4.2
通讯作者：
Ehness, R
中科院分区：
文献类型：
--
作者：
Roitsch, T;Ehness, R
细胞分裂素的许多生理作用已被充分确立，并且已知涉及植物生命周期的各个方面。相反，人们对这些效应是如何在分子水平上引起的知之甚少。由于细胞分裂素已被证明在调节与活跃生长相关的各种过程中发挥重要作用，因此对碳水化合物的需求增加，因此建议与同化物分配的调节有关。本文综述了细胞分裂素在调节源-库关系中的作用，基于细胞分裂素对细胞外转化酶和己糖转运蛋白的协同诱导的发现。诱导这些关键酶的质外体卸载机制可能是一个重要的分子先决条件不同的细胞分裂素介导的影响。
Many physiological effects of cytokinins are well established and are known to be involved in various aspects of the plant life cycle. In contrast, little is known about how these effects are evoked at the molecular level. Since cytokinins have been shown to play a major role in the regulation of various processes associated with active growth and thus an enhanced demand for carbohydrates, a link to the regulation of assimilate partitioning has been suggested. This review discusses the current knowledge of the role of cytokinins in the regulation of source-sink relations, based on the finding of the co-ordinated cytokinin induction of an extracellular invertase and a hexose transporter. The induction of these key enzymes of an apoplastic unloading mechanism may be one important molecular prerequisite for different cytokinin-mediated effects.