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Lateral root development in Arabidopsis seedlings and its regulation by light

拟南芥幼苗侧根发育及其光调控

基本信息

批准号：
261041208
负责人：
Dr. Stefan Kircher
金额：
--
依托单位：
Institut für Biologie II
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2014
资助国家：
德国
起止时间：
2013-12-31 至 2020-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/261041208?language=en
关键词：
Lateral root development Arabidopsis seedlings

项目摘要

Recently, we could show that elongation growth of the young primary root in seedlings is controlled by the availability of photosynthetic assimilates. In addition, we could provide evidence that light controls lateral root development. Lateral roots emerge de novo from pericycle cells of the main root, a process which is mediated by auxin signaling. The aim of this research proposal is to elucidate the photo regulation of anlage and outgrowth of lateral roots in the model system Arabidopsis thaliana. Considering the so far limited knowledge about photo control of these processes we want to focus on the following essential and open questions.It is not known so far which photoreceptors and corresponding signaling components are involved in control of lateral root development. In the context of this first complex of analysis we additionally want to address the question which organs of the seedling are responsible for perception of the incident light information. The second key aspect will be directed to the question if positioning of lateral roots on the main root axis is mediated by an endogenous blueprint or controlled by light stimuli. This analysis implies clear distinction between anlage of lateral root primordia on the one and outgrowth of these structures on the other hand. Because of the essential contribution of the hormone auxin during the process of lateral root development we finally want to address the question how and on which molecular level integration of light and auxin signaling takes place. These key questions of the research proposal will be executed by means of photo biological, cell biological and genetic technologies.

最近，我们可以证明幼苗幼根的伸长生长受光合同化物有效性的控制。此外，我们可以提供光控制侧根发育的证据。侧根由主根的中柱鞘细胞新生，这一过程由生长素信号介导。本研究的目的是阐明拟南芥模式系统中侧根生长的光调控。考虑到迄今为止关于这些过程的照片控制的有限知识，我们要关注以下基本和开放的问题。目前还不清楚哪些光感受器和相应的信号成分参与了侧根发育的控制。在这第一个复杂分析的背景下，我们还想解决幼苗的哪些器官负责感知入射光信息的问题。第二个关键方面将针对侧根在主根轴上的定位是由内源性蓝图介导还是由光刺激控制的问题。这一分析表明侧根原基的来源与侧根原基的生长有明显的区别。由于生长素在侧根发育过程中的重要作用，我们最终想要解决的问题是，光和生长素信号如何以及在哪个分子水平上整合发生。这些研究计划的关键问题将通过光生物学、细胞生物学和基因技术来执行。