Collaborative Research: The Evolution of Leaf Form in Viburnum (Adoxaceae)

合作研究：荚莲属植物（Adoxaceae）叶子形态的进化

• 批准号: 0842800
• 负责人: Michael Donoghue
• 金额: $ 21.1万
• 依托单位: Yale 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: 2009-06-01 至 2013-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0842800&HistoricalAwards=false
• 关键词: Collaborative; Research; Evolution; Leaf; Form

"This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5)." Terrestrial plants display remarkable variation in many aspects of leaf form. Leaves serve as main sites for photosynthesis, and are thus primary custodians of plant growth and ultimately, fitness. Previous work suggests that there are optimal values for particular leaf traits in a given environment that will maximize growth, and thus predicts that certain leaf forms will evolve under certain conditions. However, evolutionary response to external pressures such as climate may be constrained, because leaves are developmentally and functionally integrated parts of the whole plant. In spite of the long-standing interest in the role of leaves in plant ecological adaptation, few studies have successfully documented consistent evolutionary shifts in leaf traits in relation to environment. This collaborative project will develop the plant lineage Viburnum (Adoxaceae), a widespread group of approximately 168 species of woody shrubs and trees, as a model system for investigations into the ecology and evolution of leaf form. Viburnum is ideally suited for this problem as it exhibits a remarkable diversity of leaf shapes and sizes, and much is already known regarding evolutionary relationships within the group. The interdisciplinary PI team will collect physiological data from two common gardens, anatomical and environmental data from herbarium collections, and molecular sequence data for phylogenetic analyses to produce a unique, whole-lineage perspective on leaf evolution that is simultaneously detailed and broad. They will directly test several hypotheses regarding stem and leaf co-evolution, the decoupling of certain aspects of leaf water use from photosynthetic capacity, and the evolution of particular leaf traits in response to environmental conditions. One prediction is that considerable leaf shape diversity has evolved within a relatively narrow climate space, suggesting that other factors have historically been more important in shaping the evolutionary trajectory of leaf structure and function. Results from this work may be directly relevant to predicting plant response to rapid climate change. This work will also result in the development of new online community-wide teaching and research resources, such as a large leaf collection for anatomical study. In conjunction with the Peabody Museum of Natural History and public school teachers from the Providence, RI area, the PI's will also develop two 'leaf diversity' education modules targeted for elementary and high school levels in the New Haven and Providence school districts.

“该奖项的资金来源是《2009 年美国复苏和再投资法案》（公法 111-5）。”陆生植物在叶形的许多方面表现出显着的变化。叶子是光合作用的主要场所，因此是植物生长和最终健康的主要守护者。先前的研究表明，在给定环境中，特定叶子性状存在最佳值，可以最大限度地促进生长，从而预测某些叶子形状将在某些条件下进化。然而，对气候等外部压力的进化反应可能会受到限制，因为叶子是整个植物的发育和功能整合部分。尽管长期以来人们对叶子在植物生态适应中的作用很感兴趣，但很少有研究成功地记录了叶子性状与环境相关的一致的进化转变。该合作项目将开发植物谱系荚莲属植物（Adoxaceae），这是一个分布广泛的群体，由约 168 种木本灌木和树木组成，作为研究叶形生态和进化的模型系统。荚莲属植物非常适合解决这个问题，因为它的叶子形状和大小具有显着的多样性，并且关于该群体内的进化关系已经有很多了解。跨学科的 PI 团队将从两个常见的花园收集生理数据，从植物标本室收集解剖和环境数据，以及用于系统发育分析的分子序列数据，以产生关于叶子进化的独特的、全谱系的视角，既详细又广泛。他们将直接测试关于茎和叶共同进化、叶子水分利用的某些方面与光合能力的脱钩以及特定叶子性状响应环境条件的进化的几个假设。一种预测是，在相对狭窄的气候空间内进化出了相当大的叶子形状多样性，这表明历史上其他因素在塑造叶子结构和功能的进化轨迹方面更为重要。这项工作的结果可能与预测植物对快速气候变化的反应直接相关。这项工作还将导致新的在线社区教学和研究资源的开发，例如用于解剖学研究的大量叶子收藏。 PI 还将与皮博迪自然历史博物馆和罗得岛州普罗维登斯地区的公立学校教师合作，开发两个针对纽黑文和普罗维登斯学区中小学水平的“树叶多样性”教育模块。