Collaborative Proposal: Roles for Dehydration and Photoperiodism in Preparing an Antarctic Insect for the Polar Night

合作提案：脱水和光周期现象在南极昆虫为极夜做好准备中的作用

• 批准号: 0837559
• 负责人: Richard Lee
• 金额: --
• 依托单位: Miami University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-08-15 至 2013-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0837559&HistoricalAwards=false
• 关键词: Collaborative; Proposal; Roles; Dehydration; Photoperiodism

This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5).Polar terrestrial environments are often described as deserts, where water availability is a critical factor limiting the distribution of terrestrial organisms. In such environments, tolerance of low moisture conditions is likely as important as cold resistance. Winter survival for many polar organisms depends on a coordinated transition from feeding, growth and reproduction during short summers, to an energy-conserving dormancy coupled with enhanced resistance to environmental extremes during long, severe winters. The midge Belgica antarctica provides an excellent model system for investigating mechanisms of stress (cold and low moisture) tolerance, and the role of extreme photoperiodic changes in coordinating seasonal adaptations. The proposed research will use gene and protein level approaches to investigate the seasonal roles of dehydration and photoperiodic cues in preparing a polar insect for winter survival. The research will investigate (1) the role of aquaporins, dehydrins, and cryoprotective dehydration in seasonal survival, and (2) the role of photoperiodism in preparing for winter. Broader impacts involve engagement of K-12 educators and students, including hands-on, in-the-field research experiences for teachers, presentations at local schools, development of lesson plans and podcasts, and publication of articles in education journals. The principal investigators also will engage graduate students, undergraduates, and post-docs in the project.

该奖项根据 2009 年《美国复苏和再投资法案》（公法 111-5）提供资金。极地陆地环境通常被描述为沙漠，其中水资源供应是限制陆地生物分布的关键因素。在这种环境中，对低湿度条件的耐受性可能与耐寒性一样重要。许多极地生物的冬季生存取决于从短暂夏季的摄食、生长和繁殖到节能休眠的协调过渡，以及漫长而严酷的冬季对极端环境的抵抗力的增强。 南极洲的 Belgica 蠓为研究应激（寒冷和低湿度）耐受机制以及极端光周期变化在协调季节适应中的作用提供了一个极好的模型系统。拟议的研究将使用基因和蛋白质水平的方法来研究脱水和光周期线索在极地昆虫冬季生存中的季节性作用。该研究将调查（1）水通道蛋白、脱水蛋白和防冻脱水在季节性生存中的作用，以及（2）光周期在为冬季做准备中的作用。 更广泛的影响涉及 K-12 教育工作者和学生的参与，包括教师的实践、现场研究经验、在当地学校的演讲、课程计划和播客的制定以及在教育期刊上发表文章。 主要研究人员还将让研究生、本科生和博士后参与该项目。