The Snow Alga Chlamydomonas nivalis: PhotosynthesisUnder the Greatest Extremes of High Light, UV-B Radiation and Low Temperature on Earth

雪藻衣藻:地球上最极端的高光、UV-B 辐射和低温下的光合作用

基本信息

  • 批准号:
    9714268
  • 负责人:
  • 金额:
    $ 23.45万
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
    Standard Grant
  • 财政年份:
    1997
  • 资助国家:
    美国
  • 起止时间:
    1997-09-15 至 2001-08-31
  • 项目状态:
    已结题

项目摘要

Vogelman 97-14268 The snow alga, Chlamvdomonas nivalis. grows on permanent snowfields and is found in the alpine zone of the Rocky Mountairm, a habitat that consists of some of the most extreme environmental conditions found on Earth. In addition to surviving diurnal freezing temperatures, this organism photosynthesizes under some clef the highest fluxes of visible light and ultraviolet-B radiation (UV-B; 280-320 run) found in a natural environment. The proposed research will quantify microenvironmcnta1 extremes experienced by this nucroorganism and will provide baseline information on its photosynthetic performance tinder such severe conditions. Using a variety of portable microscopic sensors and instruments, simultaneous er~virontnental measurements of temperature, light, UV-B radiation, COz concentrations add of photosynthetic performance will be made across snow-deplh profiles containing C. nivalis populations. Photosynthesis will be measured in 'vitro by oxygen evolution and under conditions of variable light avid temperature. Corroborative measurements of carbon fixation will be obtained by measuring incorporation of i4C:O2 within snow cores. Effects of W-B on C. nivaIis populations and photosynthetic performance verity be determined frown We exclusion experiments conducted on the snowfields. These experiments will establish a baseline for future studies of molecular mechanisms that regulate adaptation and survival of this microorganism in this extreme habitat.
电话:97-14268 雪的味道,Chlamvnivalis。生长在永久性的雪原上,并在落基山脉的高山地带被发现,这是一个由地球上最极端的环境条件组成的栖息地。除了在日间冰冻温度下生存外,这种生物还在自然环境中发现的最高可见光和紫外线B辐射(UV-B; 280-320 run)通量下进行光合作用。拟议的研究将量化这种核生物所经历的极端微生物,并将提供有关其光合性能的基线信息。 利用各种便携式显微传感器和仪器,对含C. nivalis种群。 光合作用将在体外通过氧释放和可变光温条件下测量。通过测量雪芯中i4 C:O2的掺入量,将获得碳固定的确证性测量结果。W-B对C.通过在雪地上进行的排除试验,确定了雪腐植物种群数量和光合性能。这些实验将为未来研究调节这种微生物在这种极端栖息地的适应和生存的分子机制建立一个基线。

项目成果

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Thomas Vogelmann其他文献

Thomas Vogelmann的其他文献

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{{ truncateString('Thomas Vogelmann', 18)}}的其他基金

Development of a Dual-beam Integrating Sphere Spectrophotometer for Measuring Absorption of Diffuse UV-VIS Radiation in Leaves and other Biological Samples
开发双光束积分球分光光度计,用于测量叶子和其他生物样品中漫反射 UV-VIS 辐射的吸收
  • 批准号:
    0454933
  • 财政年份:
    2005
  • 资助金额:
    $ 23.45万
  • 项目类别:
    Continuing Grant
Development of Ultrafast Optical Instrumentation to Measure Photon Lifetime in Leaves and Other Biological Tissues
开发超快光学仪器来测量叶子和其他生物组织中的光子寿命
  • 批准号:
    9996256
  • 财政年份:
    1999
  • 资助金额:
    $ 23.45万
  • 项目类别:
    Continuing Grant
Development of Ultrafast Optical Instrumentation to Measure Photon Lifetime in Leaves and Other Biological Tissues
开发超快光学仪器来测量叶子和其他生物组织中的光子寿命
  • 批准号:
    0096296
  • 财政年份:
    1999
  • 资助金额:
    $ 23.45万
  • 项目类别:
    Continuing Grant
Development of a Scanning Photoacoustic Instrument with Microscopic Resolution for Studies of Leaf Structure-Function and Photosynthesis Within Tissues
开发具有显微分辨率的扫描光声仪器,用于研究叶片结构功能和组织内的光合作用
  • 批准号:
    9724499
  • 财政年份:
    1997
  • 资助金额:
    $ 23.45万
  • 项目类别:
    Standard Grant
Leaf Structural Properties that Influence Photosynthesis: Interactions Between Gradients of Light and Photosynthetic Capacity
影响光合作用的叶片结构特性:光梯度与光合能力之间的相互作用
  • 批准号:
    9409139
  • 财政年份:
    1994
  • 资助金额:
    $ 23.45万
  • 项目类别:
    Standard Grant
Leaf Structural Properties that Influence Photosynthesis: Interactions Between Gradients of Light, CO2, and Photosynthetic Capacity
影响光合作用的叶片结构特性:光梯度、二氧化碳和光合能力之间的相互作用
  • 批准号:
    9118729
  • 财政年份:
    1992
  • 资助金额:
    $ 23.45万
  • 项目类别:
    Standard Grant
Development of an Epi-Illuminating Fiber Optic Microprobe for Analysis of Chloroplast Specialization and Measurement of Chemical Parameters within Plant Tissue.
开发用于叶绿体特化分析和植物组织内化学参数测量的落射照明光纤微探针。
  • 批准号:
    9012729
  • 财政年份:
    1990
  • 资助金额:
    $ 23.45万
  • 项目类别:
    Continuing Grant
Leaf Structural Properties that Influence Internal Light Regime and Photosynthetic Efficiency: Epidermal Lens Cells and Internal Leaf Anatomy
影响内部光照状态和光合效率的叶子结构特性:表皮晶状体细胞和内部叶子解剖结构
  • 批准号:
    8908328
  • 财政年份:
    1989
  • 资助金额:
    $ 23.45万
  • 项目类别:
    Standard Grant
Development of Fiber Optic Microsensors for Measuring Light and Biochemical Parameters within Cells
开发用于测量细胞内光和生化参数的光纤微传感器
  • 批准号:
    8606824
  • 财政年份:
    1986
  • 资助金额:
    $ 23.45万
  • 项目类别:
    Continuing Grant
1981 Nsf Postdoctoral Fellowship Program
1981 NSF博士后奖学金计划
  • 批准号:
    8166046
  • 财政年份:
    1981
  • 资助金额:
    $ 23.45万
  • 项目类别:
    Fellowship Award

相似国自然基金

离子注入增强(AlGa)InP量子阱界面混合及其特性研究
  • 批准号:
    19975030
  • 批准年份:
    1999
  • 资助金额:
    16.5 万元
  • 项目类别:
    面上项目

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