Shell Morphogenesis in Giant Agglutinated Foraminifera

巨型凝集有孔虫的壳形态发生

• 批准号: 9725830
• 负责人: Samuel Bowser
• 金额: $ 37万
• 依托单位: Health Research Incorporated/New York State Department of Health
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-03-15 至 2002-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9725830&HistoricalAwards=false
• 关键词: Shell; Morphogenesis; Giant; Agglutinated; Foraminifera

Samuel Bowser OPP97-25830 Abstract A dominant member of cold, deep-sea sediments is a group of giant protozoa, the aggulatinated foraminifera, also known as forams. For protection, these single-celled organisms encase themselves in architecturally-elegant shells that they construct by collecting, sorting, and cementing together sediment grains. The unique occurrence of these giant cells (greater than one millimeter in size) in the shallow waters of McMurdo Sound, Antarctica allows for the study of the cellular and molecular aspects of shell constructions. This project will use novel light microscopic methods to examine how agglutinated forams secrete and sculpt the adhesive matrix that binds sediment particular in their shells. Comparative time-lapse photography of different foram species constructing shells will identify key steps in the processes that lead to the various shell morphologies. Peptide sequence analyses of the elastic proteins of the shells will provide valuable insight into the chemical nature of foram bioadhesives. From a practical standpoint, these cements have important biotechnological and medical applications. This project will also continue a study of the effects of collection activities, as well as natural physical disturbances, in this unique environment. This interdisciplinary project has implications in a number of fields, including cellular development, evolution, paleontology, marine products chemistry, and ecosystem management.

塞缪尔·鲍泽 OPP97-25830 摘要 寒冷深海沉积物的主要成员是一群巨大的原生动物，即有孔虫，也称为有孔虫。为了保护自己，这些单细胞生物将自己包裹在结构优雅的外壳中，它们通过收集、分类和粘合沉积物颗粒来构建这些外壳。在南极洲麦克默多湾的浅沃茨中，这些巨大的细胞（尺寸大于一毫米）的独特出现，使人们能够研究贝壳结构的细胞和分子方面。这个项目将使用新的光学显微镜方法来研究凝集有孔虫如何分泌和塑造粘合剂基质，特别是在他们的壳中结合沉积物。比较不同有孔虫物种构建外壳的延时摄影将确定导致各种外壳形态的过程中的关键步骤。肽序列分析的弹性蛋白的壳将提供宝贵的洞察有孔虫生物粘合剂的化学性质。从实用的角度来看，这些水泥具有重要的生物技术和医学应用。该项目还将继续研究在这一独特环境中收集活动以及自然物理干扰的影响。 这个跨学科的项目在许多领域都有影响，包括细胞发育，进化，古生物学，海产品化学和生态系统管理。