Interaction diversity explains the maintenance of phytochemical diversity,Ecology Letters

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Interaction diversity explains the maintenance of phytochemical diversity
Ecology Letters ( IF 7.6 ) Pub Date : 2021-03-29 , DOI: 10.1111/ele.13736
Susan R. Whitehead _{1,

2} , Ethan Bass _{2,

3} , Alexsandra Corrigan _{1,

4} , André Kessler ₃ , Katja Poveda ₂

Affiliation

The production of complex mixtures of secondary metabolites is a ubiquitous feature of plants. Several evolutionary hypotheses seek to explain how phytochemical diversity is maintained, including the synergy hypothesis, the interaction diversity hypothesis, and the screening hypothesis. We experimentally tested a set of predictions derived from these hypotheses by manipulating the richness and structural diversity of phenolic metabolites in the diets of eight plant consumers. Across 3940 total bioassays, there was clear support for the interaction diversity hypothesis over the synergy or screening hypotheses. The number of consumers affected by a particular phenolic composition increased with increasing richness and structural diversity of compounds. Furthermore, the bioactivity of phenolics was consumer-specific. All compounds tested reduced the performance of at least one consumer, but no compounds affected all consumers. These results show how phytochemical diversity may be maintained in nature by a complex selective landscape exerted by diverse communities of plant consumers.

中文翻译：

相互作用的多样性解释了植物化学多样性的维持

次生代谢产物的复杂混合物的产生是植物普遍存在的特征。几种进化假说试图解释植物化学多样性的维持方式，包括协同假说，相互作用假说和筛选假说。我们通过控制八种植物消费者饮食中酚类代谢物的丰富度和结构多样性，对这些假设进行了实验性的测试。在总共3940种生物测定中，对于协同作用或筛选假设的相互作用多样性假设有明确的支持。受特定酚类成分影响的消费者数量随着化合物的丰富度和结构多样性的增加而增加。此外，酚类化合物的生物活性是针对特定消费者的。所有测试的化合物都会降低至少一个消费者的性能，但是没有化合物会影响所有消费者。这些结果表明，植物消费者的各种群落所发挥的复杂的选择性景观如何在自然界中维持植物化学多样性。

更新日期：2021-05-19

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