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Patterning Genes in Streptophytes: Origin of a Basic Developmental Patterning System and its Role in the Evolution of Land Plant Form

链藻中的模式基因：基本发育模式系统的起源及其在陆地植物形态进化中的作用

基本信息

批准号：
0515435
负责人：
John Bowman
金额：
$ 47万
依托单位：
University of California-Davis
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
2005
资助国家：
美国
起止时间：
2005-08-01 至 2009-07-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=0515435&HistoricalAwards=false
关键词：
Patterning Genes Streptophytes Origin Basic

项目摘要

The origin of land plants was one of the most important events in the earth's evolutionary history. A key feature associated with the evolution of the land plant body plan was the origin of three dimensional tissue patterning derived from a shoot apical meristem, with the capacity for branching, production of leaves and flowers, and the origin of roots. The aims of the proposed research are to characterize the Class III HD-Zip and KANADI gene families in plants representing all land plant lineages and the algal sister group. These gene families were chosen because of their pivotal roles in Arabidopsis in the SAM function, patterning of tissues in stem, leaf, and root, and vascular differentiation, which represent the key innovations of land plant body plan evolution. Since members of both gene families function as a single genetic program in each of the tissues where they act in Arabidopsis, investigation of the evolution of gene expression and function in a broad phylogenetic sample of plants has the potential to yield evidence of how this genetic program has been co-opted to pattern new morphological structures. Such knowledge may be applied to manipulate plant architecture for agricultural or forestry purposes. This research will involve several undergraduate students from diverse backgrounds who will either continue their education in various graduate programs or go on to jobs in the biotech industry. In addition, the proposed research will provide undergraduate and graduate training in evolutionary developmental biology.

陆地植物的起源是地球进化史上最重要的事件之一。与陆地植物体规划进化相关的一个关键特征是源自茎尖分生组织的三维组织图案的起源，具有分枝、产生叶和花的能力以及根的起源。拟议研究的目的是表征代表所有陆地植物谱系和藻类姐妹群的植物中的 III 类 HD-Zip 和 KANADI 基因家族。选择这些基因家族是因为它们在拟南芥中的 SAM 功能、茎、叶和根的组织模式以及维管分化中发挥着关键作用，这些代表了陆地植物体规划进化的关键创新。由于这两个基因家族的成员在拟南芥中的每个组织中都作为单个遗传程序发挥作用，因此对广泛的植物系统发育样本中基因表达和功能的进化进行研究有可能提供证据，证明该遗传程序如何被选为模式新的形态结构。这些知识可用于操纵植物结构以用于农业或林业目的。这项研究将涉及几名来自不同背景的本科生，他们要么继续接受各种研究生课程的教育，要么继续在生物技术行业工作。此外，拟议的研究还将提供进化发育生物学的本科生和研究生培训。