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.

土地植物的起源是地球进化史上最重要的事件之一。与土地植物体计划的演变相关的一个关键特征是源自芽顶分生组织的三维组织模式的起源，具有分支的能力，叶子和花朵的产生以及根的起源。拟议研究的目的是表征代表所有土地植物谱系和藻类姐妹组的植物中III级HD-ZIP和Kanadi基因家族。之所以选择这些基因家族，是因为它们在拟南芥功能中具有关键作用，在茎，叶和根中的组织模式以及血管分化，这代表了土地植物身体计划进化的关键创新。由于两个基因家族的成员在它们在拟南芥中作用的每个组织中都起着单个遗传程序的作用，因此对植物的广泛系统发育样本中基因表达和功能的演变进行了研究，可以产生证据证明该遗传程序是如何配对的，以模拟新的形态结构。这些知识可以用于农业或林业目的的植物建筑。这项研究将涉及来自不同背景的几位本科生，他们要么在各种研究生课程中继续教育，要么从事生物技术行业的工作。此外，拟议的研究将提供进化发展生物学的本科和研究生培训。