PEET: Monographic and Phylogenetic Studies of Simple Thalloid Hepatics (Jungermanniopsida, Metzgeriidae)

PEET：简单Thalloid Hepas（Jungermanniopsida，Metzgeriidae）的专题和系统发育研究

• 批准号: 9977961
• 负责人: Raymond Stotler
• 金额: $ 75万
• 依托单位: Southern Illinois University at Carbondale
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-09-01 至 2006-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9977961&HistoricalAwards=false
• 关键词: PEET; Monographic; Phylogenetic; Studies; Simple

9977961Raymond Stotler and Barbara Crandall-Stotler The two goals of this project in the Partnerships for Enhancing Expertise in Taxonomy are toresolve the taxonomic perplexities of the Metzgeriidae, a plant group commonly referred to as the simple thalloid liverworts, and in the process to train a new generation of skilled experts in hepaticology, i. e., thestudy of liverworts. The Metzgeriidae are the geologically oldest group of bryophytes, with fossil representatives dating back to the beginning of terrestrial plant colonization, about 400 million years ago. Today, they are cosmopolitan in distribution but with their greatest diversification in the tropics. In addition to playing a major role in the nutrient cycles of tropical ecosystems, liverworts synthesize a myriad of biologically active compounds that have pharmaceutical potential. Tapping this potential,however, necessitates that the diversity of these poorly known, understudied plants be inventoried and classified and that fundamental features of their reproductive biology be elucidated. To this end, the research plan of this project includes the following: a taxonomic survey of the morphological diversity of the suborders Pelliineae and Pallaviciniineae, represented in existing herbarium collections; field investigations of population structure of select taxa of these suborders in North America and PuertoRico; a collecting expedition to New Zealand and Tasmania; electron-microscopic anatomical studies of conducting strand differentiation within plants of these suborders; and the generation of nuclear and chloroplast DNA sequences for phylogenetic analyses of the Metzgeriidae. Monographic studies of the Pelliineae and Pallaviciniineae are an expansion of the monographic and phylogenetic studies of a current PEET project focused on the Fossombroniineae, another basal suborder of the Metzgeriidae. In the production of the monograph, nomenclatural type specimens will be located and verified, based on their protologues, specimen loans will be arranged with all major herbaria, worldwide, and a combination of quantitative and qualitative characters will be assessed, using both SEM and optical photomicroscopy. Additional data from morphometric analyses of variation patterns, field studies, molecular sampling and anatomical studies will then be used to refine species definition. In addition, a robust molecular phylogeny of the entire Metzgeriidae will be produced. Through a combination of formal courses in systematics, seminars, workshops, and involvement in project research, a minimum of three doctoral students and one postdoctoral fellow will be trained in modern monography. Research responsibilities will be partitioned according to taxa, rather than technique, so each trainee will learn all of the methods being applied to the monograph. Research training opportunities will also be provided for two undergraduate students per year. Computer-assisted methods of data storage and retrieval, image processing, data analysis and information dissemination will be used at all stages in the project, with electronic access to project results provided through the World Wide Web. Electronic products will include an illustrated nomenclator, web-accessible specimen and literature databases, and interactive keys. The completed monographs will be archived on CD-ROM disks.

9977961 Raymond Stotler和Barbara Crandall-Stotler该项目的两个目标是提高分类学专业知识的伙伴关系，解决Metzgeriidae的分类学困惑，一个通常被称为简单叶状苔类的植物群，并在此过程中培养新一代的肝脏学专家，即。即，对苔类植物的研究。 Metzgeriidae是地质学上最古老的一组brabrites，化石代表可以追溯到大约4亿年前的陆生植物殖民化的开始。 今天，它们分布在世界各地，但在热带地区最多样化。 除了在热带生态系统的营养循环中发挥重要作用外，地钱还合成了无数具有药用潜力的生物活性化合物。 然而，挖掘这种潜力，需要对这些知之甚少、研究不足的植物的多样性进行编目和分类，并阐明其生殖生物学的基本特征。 为此，该项目的研究计划包括：对现有标本馆收藏的Pelliineae和Pallavicinineae亚目的形态多样性进行分类学调查;对北美和普埃托里科这些亚目的某些分类群的种群结构进行实地调查;对新西兰和塔斯马尼亚进行收集考察;电子显微镜解剖学研究这些亚目的植物内进行股分化;和核和叶绿体DNA序列的代Metzgeriidae的系统发育分析。 Pelliineae和Pallavicinineae的专题研究是当前PEET项目的专题和系统发育研究的扩展，该项目专注于Fossombroniineae，Metzgeriidae的另一个基底亚目。 在各论的制作过程中，将根据它们的原型定位和验证命名模式标本，将向世界各地的所有主要标本馆安排标本贷款，并将使用SEM和光学显微镜评估定量和定性特征的组合。 从变异模式的形态测量分析、实地研究、分子取样和解剖研究中获得的额外数据将用于改进物种定义。 此外，将产生整个Metzgeriidae的稳健分子系统发育。 通过系统学，研讨会，讲习班和参与项目研究的正式课程相结合，至少有三名博士生和一名博士后研究员将接受现代专著的培训。 研究职责将根据分类而不是技术进行划分，因此每个受训者将学习应用于专论的所有方法。 每年还将为两名本科生提供研究培训机会。 在项目的所有阶段都将使用计算机辅助的数据储存和检索、图像处理、数据分析和信息传播方法，并通过万维网提供项目结果的电子检索。 电子产品将包括一个有插图的命名者，网络访问的标本和文献数据库，和互动的关键。完成的各论将存档在CD-ROM光盘上。