Patterns of constitutive and induced herbivore defence are complex, but share a common genetic basis in annual and perennial monkeyflower

IF 4.6 1区 环境科学与生态学 Q1 ECOLOGY Functional Ecology Pub Date : 2024-07-01 DOI:10.1111/1365-2435.14601
Megan L. Blanchard, David B. Lowry, Liza M. Holeski
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一年生和多年生猴头花的构成型和诱导型食草动物防御模式十分复杂,但具有共同的遗传基础
尽管有多种生态和进化假说预测了植物生长、繁殖和对食草动物的构成性抗性和/或诱导性抗性之间的表型关系模式,但这些假说并未对介导这些关系的潜在分子遗传机制做出任何预测。我们研究了黄猴花不同的植物生活史策略和改变生活史的基因座 DIV1 如何影响植物抗食草动物性状的可塑性,以应对两种食性不同的食草动物的攻击。生命史策略(一年生与多年生)和 DIV1 基因座显著影响构成型抗食草性的水平,以及普通食草动物和专食食草动物食草后的抗性诱导。与一年生植物相比,无论食草动物类型如何,多年生植物的单变量组成型防御和诱导型防御总水平都更高。一年生植物对一般食草动物的诱导反应低于多年生植物,而对专性食草动物的诱导反应在不同生态型中是相同的。DIV1 基因座对组成型防御和诱导型防御水平的影响取决于遗传背景、DIV1 的一年生与多年生单倍型以及食草动物特性。DIV1 的单变量诱导模式是非加性的,并不总是与基于一年生/多年生亲本分化模式的预期一致。例如,与一年生植物相比,多年生植物具有更高水平的组成型防御和诱导型防御,但当多年生遗传背景中存在一年生 DIV1 时,其对食草动物的诱导反应高于多年生亲本。多变量防御库的模式与单变量的模式基本相同,一年生和多年生猴花以及具有 DIV1 替代版本的猴花在组成型抗性和诱导型抗性方面差异显著。与单变量抗性一样,诱导多变量抗性也受食草动物特性的影响。我们的研究结果凸显了对食草动物的可塑性响应的遗传机制的复杂性。虽然生活史策略和组成型防御的表型差异的遗传位点也影响防御可塑性,但诱导反应也取决于遗传背景。这一结果表明,在猴花中,组成型防御与诱导型防御或诱导型防御与生活史策略之间可能存在一定程度的进化独立性。在期刊博客上免费阅读本文的通俗摘要。
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来源期刊
Functional Ecology
Functional Ecology 环境科学-生态学
CiteScore
9.00
自引率
1.90%
发文量
243
审稿时长
4 months
期刊介绍: Functional Ecology publishes high-impact papers that enable a mechanistic understanding of ecological pattern and process from the organismic to the ecosystem scale. Because of the multifaceted nature of this challenge, papers can be based on a wide range of approaches. Thus, manuscripts may vary from physiological, genetics, life-history, and behavioural perspectives for organismal studies to community and biogeochemical studies when the goal is to understand ecosystem and larger scale ecological phenomena. We believe that the diverse nature of our journal is a strength, not a weakness, and we are open-minded about the variety of data, research approaches and types of studies that we publish. Certain key areas will continue to be emphasized: studies that integrate genomics with ecology, studies that examine how key aspects of physiology (e.g., stress) impact the ecology of animals and plants, or vice versa, and how evolution shapes interactions among function and ecological traits. Ecology has increasingly moved towards the realization that organismal traits and activities are vital for understanding community dynamics and ecosystem processes, particularly in response to the rapid global changes occurring in earth’s environment, and Functional Ecology aims to publish such integrative papers.
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