Taxonomic Revision, Phylogenetic Analysis, and Leaf Evolution in Elaphoglossum sect. Squamipedia (Dryopteridaceae)

剑舌属植物的分类学修订、系统发育分析和叶子进化。

• 批准号: 1020443
• 负责人: Robbin Moran
• 金额: $ 33万
• 依托单位: New York Botanical Garden
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-09-01 至 2014-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1020443&HistoricalAwards=false
• 关键词: Taxonomic; Revision; Phylogenetic; Analysis; Leaf

The project uses a synergistic approach to understand the biodiversity and evolution of ferns, a major component of the land flora and will focus on a group of tropical ferns within the genus Elaphoglossum. There are more than 600 species of Elaphoglossum and the vast majority of these species are characterized by simple leaves. However, there is a group within Elapholgossum, section Squamipedia, that has 3 species with compound leaves. The project seeks to understand the genetic basis of these diverse leaf morphologies after first discovering the evolutionary relationships among these plants. All the species in Elaphoglossum section Squamipedia will be inventoried and described using field work, herbarium collections and morphological analyses, followed by analysis of DNA sequences that will develop phylogenetic hypotheses. The genetic basis of fern leaf diversity in section Squamipedia will be examined by cloning candidate leaf genes and performing comparative expression and developmental analyses in compound and simple leaved species. These studies are integral for understanding general patterns of leaf evolution and development in land plants.This study will initiate a collaboration between PI Moran, a systematist, and Co-PI Ambrose, a developmental biologist. This proposal will provide interdisciplinary training for a female postdoctoral associate from Latin America. In connection with the field work, the PI will teach a course on ferns and lycophytes at the Catholic University in Quito, Ecuador. The PI will also work with members of the New York Fern Society on Elaphoglossum morphology. The Co-PI participates in the NYBG summer internship program that provides research experience for high school and undergraduate students. All results of the study will be made publicly available on the Elaphoglossum Pages Web site (http://sweetgum.nybg.org/elaphoglossum/index.php) and in peer-reviewed scientific journals.

该项目采用协同方法来了解蕨类植物（陆地植物区系的主要组成部分）的生物多样性和进化，并将重点关注旗花属内的一组热带蕨类植物。鹿舌草有 600 多种，其中绝大多数都有简单的叶子。 然而，Elapholgossum 内有一个类群（Squamipedia 部分），其中有 3 个物种具有复叶。该项目试图在首次发现这些植物之间的进化关系后，了解这些不同叶子形态的遗传基础。将通过实地工作、植物标本馆藏品和形态分析来清点和描述旗花属植物科中的所有物种，然后对 DNA 序列进行分析，从而提出系统发育假设。 将通过克隆候选叶基因并在复合和单叶物种中进行比较表达和发育分析来检查蕨类植物百科部分中蕨类植物叶子多样性的遗传基础。这些研究对于理解陆地植物叶子进化和发育的一般模式是不可或缺的。这项研究将启动系统学家 PI Moran 和发育生物学家 Co-PI Ambrose 之间的合作。该提案将为来自拉丁美洲的女性博士后提供跨学科培训。在实地工作方面，首席研究员将在厄瓜多尔基多的天主教大学教授蕨类植物和石松植物课程。该 PI 还将与纽约蕨类协会的成员合作研究旗舌兰的形态。 Co-PI 参加 NYBG 暑期实习计划，为高中生和本科生提供研究经验。所有研究结果将在 Elaphoglossum Pages 网站 (http://sweetgum.nybg.org/elapoglossum/index.php) 和同行评审的科学期刊上公开发布。