Physiological Ecology of UV-Absorbing Compounds in Antarctic Organisms

南极生物中紫外线吸收化合物的生理生态学

• 批准号: 9017664
• 负责人: Deneb Karentz
• 金额: $ 10.36万
• 依托单位: University of California-San Francisco
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-04-01 至 1992-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9017664&HistoricalAwards=false
• 关键词: Physiological; Ecology; UV; Absorbing; Compounds

This study will contribute to our understanding of the full range of natural "sunscreens" that marine organisms have to protect themselves against ultraviolet (UV) radiation. With concerns about increased incident UV caused by global ozone depletion, it is crucial to evaluate the ecological effects of this atmospheric phenomenon on biological systems in Antarctica. Mycosporine-like amino acids (MAAs) absorb radiation from the UV portion of the solar spectrum and are commonly found in marine species. Scientific information obtained on MAAs will further our understanding of how marine organisms deal with UV exposure and continue to function within their ecosystems. Little is known about the regulatory mechanism of MAAs production in phytoplankton or the mode by which such compounds accumulate in animal tissue. Dr. Karentz proposes to determine if changes in MAA concentration represents an adaptive response to UV exposure and to examine the possible relationships between MAA content in primary producers and their consumers. The research will be accomplished by comparing MAA concentrations in selected algal and invertebrate species at different times during the annual springtime gradients of increasing day length and ozone depletion, during different life cycle stages, and under controlled light and food conditions.

这项研究将有助于我们理解海洋生物必须保护自己免受紫外线（UV）辐射的全部天然“防晒霜”的理解。 由于人们担心全球臭氧耗竭引起的紫外线增加，评估这种大气现象对南极生物系统的生态影响至关重要。 霉素样氨基酸（MAA）从太阳光谱的紫外线部分吸收辐射，并且在海洋物种中通常发现。 在MAA上获得的科学信息将进一步了解海洋生物如何处理紫外线暴露并继续在其生态系统中起作用。 关于浮游植物中MAAS产生的调节机制或这种化合物在动物组织中积累的模式知之甚少。 Karentz博士建议确定MAA浓度的变化是否代表对紫外线暴露的适应性反应，并检查主要生产者及其消费者中MAA含量的可能关系。 这项研究将通过比较在不同的生命周期阶段以及在受控的光线和食物条件下的日期长度和臭氧耗竭的年度春季梯度中，在春季长度增加和臭氧耗竭的年度阶段，在不同的时间内，在不同的时间比较了MAA浓度。