Evolution of Temperature Controls on Alkenone Biosynthesis

烯酮生物合成温度控制的演变

• 批准号: 9909857
• 负责人: Simon Brassell
• 金额: $ 9.21万
• 依托单位: Indiana University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-01-01 至 2002-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9909857&HistoricalAwards=false
• 关键词: Evolution; Temperature; Controls; Alkenone; Biosynthesis

9909857BrassellThis project focuses on the geological record of molecular evolution. Its working hypothesis isthat alkenones were first biosynthesized by calcareous nannoplankton in the Cretaceous, but that temperature-controlled synthesis of alkenone unsaturation developed in the Eocene as a response to cooling trends. To answer this postulate the project will investigate the distributions of alkenones in suites of Paleogene and Cretaceous sediments from the Atlantic to determine the timing of the development of the temperature dependence in their biosynthesis by haptophyte algae. The availability of materials from multiple sites facilitates exploration of the timing and geographic extent of specific alkenone adaptations, and provides the opportunity to correlate their characteristics with their source organisms, calcareous nannoplankton, and the timing of significant climatic events.

9909857Brassell 该项目重点关注分子进化的地质记录。 其工作假设是，烯酮首先是在白垩纪由钙质纳米浮游生物生物合成的，但烯酮不饱和度的温控合成在始新世发展起来，作为对冷却趋势的响应。 为了回答这个假设，该项目将调查大西洋古近纪和白垩纪沉积物中烯酮的分布，以确定触生藻类生物合成中温度依赖性的发展时间。 来自多个地点的材料的可用性有助于探索特定烯酮适应的时间和地理范围，并提供将其特征与其来源生物体、钙质纳米浮游生物以及重大气候事件的时间相关联的机会。