Evolutionary ecology of plant carbon acquisition traits: fitness consequences of plant kin recognition

植物碳获取性状的进化生态学：植物亲缘识别的适应性后果

• 批准号: RGPIN-2016-06626
• 负责人: Dudley, Susan
• 金额: $ 2.04万
• 依托单位: McMaster University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=632097
• 关键词: Evolutionary; ecology; plant; carbon; acquisition

My lab has shown plant kin recognition; that is, plant traits are affected by whether neighbours are kin or strangers. Other researchers have now found similar results. The next step is determine how these responses affect plant performance. We hypothesize that plants will compete less and cooperate more with sibling neighbours. However, experimentally demonstrating the fitness consequences of kin recognition is difficult. I am proposing a three-pronged approach to understanding the fitness consequences of kin recognition responses in plants. In parallel research programs, my lab will 1) measure natural selection on traits that show kin recognition in that species; 2 ) determine whether there are fitness benefits of increased mycorrhizal production in siblings; and 3) examine how tradeoffs among life history traits are affected by growing with kin or strangers. In the first component, I will use a multilevel selection analysis approach to determine how plant traits can benefit or harm neighbours. However, because so many of the traits that show plant kin recognition are allocation traits that can only be measured destructively, I propose to incorporate a version of Rausher’s family selection, in which early allocation will be measured on some members of a family, while fitness is measured on others. We will scale this methodology up with multiple known lines, measuring kin recognition and its consequences in low and high nutrient levels. In the second component, I will investigate the fitness consequences of the increased mycorrhizal association in sibling groups. Because mycorrhizae are frequently associated with plants and can provide benefits, this increased association sibling groups provides a potential mechanism for increasing fitness in sibling groups. In the third component, we will measure kin recognition in life history traits. Growth with siblings vs. strangers may affects trait such as age-specific survivorship and fecundity, by affecting the tradeoffs among these traits.

我的实验室已经证明了植物的亲缘关系识别;也就是说，植物的特征会受到邻居是亲戚还是陌生人的影响。其他研究人员也发现了类似的结果。下一步是确定这些反应如何影响工厂性能。我们假设植物会减少与同胞邻居的竞争，更多地与同胞邻居合作。然而，通过实验证明亲属识别的适应性后果是困难的。我提出了一个三管齐下的方法来理解植物中亲属识别反应的适应性后果。在平行的研究项目中，我的实验室将1）测量自然选择对该物种中显示亲属识别的特征的影响; 2）确定在兄弟姐妹中增加菌根生产是否有健身效益; 3）研究生活史特征之间的权衡如何受到与亲属或陌生人一起生长的影响。在第一部分中，我将使用多层次选择分析方法来确定植物性状如何造福或伤害邻居。然而，因为这么多的性状，显示植物亲缘关系识别的分配性状，只能被破坏性地测量，我建议将一个版本的Rausher的家庭选择，在早期分配将被测量的一些家庭成员，而健身测量对其他人。我们将用多个已知的品系来扩大这种方法，测量亲属识别及其在低营养水平和高营养水平下的后果。在第二部分，我将调查健身的后果增加菌根协会在兄弟姐妹群体。由于真菌经常与植物相关联，可以提供益处，这种增加的关联兄弟群体提供了一种潜在的机制，以增加兄弟群体中的适应性。在第三部分中，我们将测量生活史特征中的亲属识别。兄弟姐妹与陌生人的生长可能会影响特征，如特定年龄的生存和繁殖力，通过影响这些特征之间的权衡。