RUI: Regulatory Strategies for the Efficient Use of Iron byOpen Ocean Phytoplankton

铁依赖性代谢过程是营养素的核心， 吸收和能量转换。 对于开阔的海洋浮游植物来说， 有限的铁可用性可能控制模式， 表层沃茨初级生产力的大小。 这 研究将确定铁的使用效率为几个 生态上重要的浮游植物种类。 这项工作将 最初集中在一种聚球藻上。 铁有限 将使用连续培养来获得适应于 几个铁控制的增长速度。 鲁特医生会测量 铁的总含量和铁的分布 几种很好表征的蛋白质可以控制能量， 这些细胞中的氮代谢。 聚球藻的研究 将导致与其他几个物种的比较研究， 其次是铁限制生长的直接竞争实验 条件 这项工作将提供一个了解的作用 铁在浮游植物代谢中的平行框架， 其他研究人员用来研究光的效率 和氮代谢。 个人对铁的有效利用 浮游植物物种是由它们的策略控制的， 调控 这些策略影响蛋白质含量， 增长过程的效率，不仅具有竞争力， 对这些物种的重要性，也有助于塑造社区 地表水生态系统结构。

Iron-dependent metabolic processes are central to nutrient uptake and energy transduction. For open ocean phytoplankton, restricted iron availability may control the patterns and magnitude of primary productivity in surface waters. This research will determine the iron use efficiencies for several ecologically important phytoplankton species. The work will originally focus on a strain of Synechococcus. Iron-limited continuous cultures will be used to obtain cells adapted to several iron-controlled growth rate. Dr. Rueter will measure the total iron content and the distribution of the iron into several well characterized proteins that may control energy and nitrogen metabolism in these cells. The work with Synechococcus will lead to comparative studies with several other species, followed by direct competition experiments in iron-limited growth conditions. This work will provide an understanding of the role of iron in phytoplankton metabolism in a parallel framework to that used by other investigators studying the efficiency of light and nitrogen metabolism. The efficient use of iron by individual phytoplankton species is controlled by their strategies of regulation. These strategies effect protein content and efficiency of growth processes and not only have competitive significance for those species but also help shape the community structure of surface water ecosystems.