Floral Development and Phylogenetic Relationships of the Haemodoraceae

血红花科的花发育和系统发育关系

• 批准号: 8822606
• 负责人: Michael Simpson
• 金额: $ 15.4万
• 依托单位: San Diego State University Foundation
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1989
• 资助国家: 美国
• 起止时间: 1989-06-15 至 1993-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8822606&HistoricalAwards=false
• 关键词: Floral; Development; Phylogenetic; Relationships; Haemodoraceae

Flower development in the plant family Haemodoraceae and close relatives will be studied using light and scanning electron microscopy by Dr. Michael Simpson of San Diego State University. The purpose of the study is to clarify past evolutionary relationships within this group. Specific objectives include: 1) recognizing new descriptive characters; 2) assessing character homology (similarity by common ancestry); 3) determining character ancestry; and 4) testing hypotheses of evolutionary change. The project is innovative in utilizing morphometrics, mathematical techniques for tracing changes in shape and form. Morphometric data will be acquired using a computerized video image analysis system that measures coordinate, length, and area parameters. Developmental stages of ovules, seeds, and ovary will be traced by establishing a relative time scale, calibrated by recording embryological stage, the relative position of the bud in the inflorescence, or the length of major floral organs. Statistical procedures, including bivariate plots and principle components analysis, will be used to trace developmental changes. By comparing growth rates of organs relative to known ancestor/descendent relationships, the possible occurrence of heterochrony (change in rate or timing of development) in structural evolution will be tested. Finally, an attempt will be made to assess the possible adaptive significance of floral organs by correlating these developmental parameters with biogeography, ecology, and pollination mechanisms.//

植物花的发育及 近亲将使用光线和扫描进行研究 电子显微镜由圣地亚哥州立大学的迈克尔·辛普森博士 大学 这项研究的目的是澄清过去 进化关系。 具体 目标包括：1）识别新的描述性汉字; 2)评估性状同源性（共同祖先的相似性）; 3)确定性格祖先;和4）测试假设， 进化的变化 该项目创新性地利用了 形态测量学，追踪变化的数学技术， 形状和形式。 将使用 计算机化视频图像分析系统， 坐标、长度和面积参数。 发育阶段 胚珠、种子和子房将通过建立一个 相对时间尺度，通过记录胚胎阶段进行校准， 花蕾在花序中的相对位置，或 花的主要器官的长度。 统计程序，包括 将使用双变量图和主成分分析 来追踪发育变化 通过比较 器官相对于已知的祖先/后代关系， 可能发生的异时性（变化率或时间 在结构演变中，将进行测试。 最后通过一个 将尝试评估可能的适应意义 通过将这些发育参数 地理学、生态学和授粉机制。