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.

9977961Raymond Stotler 和 Barbara Crandall-Stotler 该项目在增强分类学专业知识伙伴关系中的两个目标是解决 Metzgeriidae（通常被称为简单菌体地钱的植物群）的分类学困惑，并在此过程中培养新的一代熟练的肝病专家，i。例如，地钱的研究。 Metzgeriidae 是地质上最古老的苔藓植物类群，其化石代表可以追溯到大约 4 亿年前陆地植物殖民之初。 如今，它们的分布遍及世界各地，但在热带地区最为多样化。 除了在热带生态系统的营养循环中发挥重要作用外，苔类植物还合成多种具有药用潜力的生物活性化合物。 然而，要挖掘这一潜力，就必须对这些鲜为人知、研究不足的植物的多样性进行清查和分类，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以下内容：对现有植物标本馆收藏中的 Pelliineae 和 Pallaviciniineae 亚目的形态多样性进行分类学调查；对北美和波多黎各这些亚目的选定类群的种群结构进行实地调查；新西兰和塔斯马尼亚的收藏探险；在这些亚目植物中进行链分化的电子显微镜解剖学研究；以及生成用于 Metzgeriidae 系统发育分析的核和叶绿体 DNA 序列。 Pelliineae 和 Pallaviciniineae 的专题研究是当前 PEET 项目的专题和系统发育研究的扩展，该项目重点关注 Fossombroniineae（Metzgeriidae 的另一个基础亚目）。 在专着的制作过程中，将根据其原型来定位和验证命名类型标本，将与世界各地所有主要植物标本室安排标本借阅，并使用扫描电镜和光学技术对定量和定性特征进行评估光学显微镜。 来自变异模式的形态测量分析、实地研究、分子采样和解剖学研究的额外数据将用于完善物种定义。 此外，还将产生整个 Metzgeriidae 的强大分子系统发育。 通过系统学、研讨会、讲习班和参与项目研究等正式课程的结合，至少三名博士生和一名博士后将接受现代专着的培训。 研究职责将根据分类单元而不是技术进行划分，因此每个学员都将学习专着中应用的所有方法。 每年还将为两名本科生提供研究培训机会。 数据存储和检索、图像处理、数据分析和信息传播的计算机辅助方法将在项目的所有阶段使用，并通过万维网提供对项目结果的电子访问。 电子产品将包括插图命名器、可通过网络访问的样本和文献数据库以及交互式密钥。完成的专着将存档在光盘上。