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.

该奖项是根据2009年《美国复苏和再投资法案》(公法111-5)资助的。极地陆地环境通常被描述为沙漠，那里的水供应是限制陆地生物分布的关键因素。在这样的环境中，对低湿度条件的耐受性可能与抗寒性一样重要。许多极地生物的冬季生存依赖于从短暂夏季的取食、生长和繁殖协调过渡到节能休眠，并在漫长而严酷的冬季增强对极端环境的抵抗力。南极Belgica吸虫为研究胁迫(冷和低水分)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很好的模式系统。这项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信号在极地昆虫为冬季生存做准备方面的季节性作用。这项研究将调查(1)水通道蛋白、脱水蛋白和低温保护性脱水在季节性生存中的作用，以及(2)光周期在准备过冬方面的作用。更广泛的影响包括K-12教育工作者和学生的参与，包括为教师提供的实践和实地研究经验，在当地学校的演讲，制定教案和播客，以及在教育期刊上发表文章。主要研究人员还将邀请研究生、本科生和博士后参与该项目。