Ojeda-Prieto L, Medina-van Berkum P, Unsicker S B, Heinen R, Weisser W W
Terrestrial Ecology Research Group, Department for Life Science Systems, TUM School of Life Sciences, Technical University of Munich, Freising, Germany.
Department for Biochemistry, Max Planck Institute for Chemical Ecology, Jena, Germany.
Plant Biol (Stuttg). 2025 Aug;27(5):785-801. doi: 10.1111/plb.13646. Epub 2024 Apr 9.
The study investigated the impact of intraspecific plant chemodiversity on plant growth and reproductive traits at both the plant and plot levels. It also aimed to understand how chemodiversity at stand level affects ecosystem functioning and plant-plant interactions. We describe a biodiversity experiment in which we manipulated intraspecific plant chemodiversity at the plot level using six different chemotypes of common tansy (Tanacetum vulgare L., Asteraceae). We tested the effects of chemotype identity and plot-level chemotype richness on plant growth and reproductive traits and plot-level headspace emissions. The study found that plant chemotypes differed in growth and reproductive traits and that traits were affected by the chemotype richness of the plots. Although morphological differences among chemotypes became less pronounced over time, reproductive phenology patterns persisted. Plot-level trait means were also affected by the presence or absence of certain chemotypes in a plot, and the direction of the effect depended on the specific chemotype. However, chemotype richness did not lead to overyielding effects. Lastly, chemotype blends released from plant communities were neither richer nor more diverse with increasing plot-level chemotype richness, but became more dissimilar as they became more dissimilar in their leaf terpenoid profiles. We found that intraspecific plant chemodiversity is crucial in plant-plant interactions. We also found that the effects of chemodiversity on plant growth and reproductive traits were complex and varied depending on the chemotype richness of the plots. This long-term field experiment will allow further investigation into plant-insect interactions and insect community assembly in response to intraspecific chemodiversity.
该研究在植物和小区水平上调查了种内植物化学多样性对植物生长和繁殖性状的影响。它还旨在了解林分水平的化学多样性如何影响生态系统功能以及植物间的相互作用。我们描述了一项生物多样性实验，在该实验中，我们使用六种不同化学型的普通艾菊（菊科艾菊属）在小区水平上操纵种内植物化学多样性。我们测试了化学型身份和小区水平的化学型丰富度对植物生长和繁殖性状以及小区水平顶空排放的影响。研究发现，植物化学型在生长和繁殖性状上存在差异，并且这些性状受到小区化学型丰富度的影响。尽管随着时间的推移，化学型之间的形态差异变得不那么明显，但繁殖物候模式仍然存在。小区水平的性状均值也受到小区中某些化学型存在与否的影响，并且影响的方向取决于特定的化学型。然而，化学型丰富度并未导致超产效应。最后，随着小区水平化学型丰富度的增加，植物群落释放的化学型混合物既不更丰富也不更多样化，但随着它们在叶片萜类化合物谱上变得更加不同，它们变得更加不同。我们发现种内植物化学多样性在植物间相互作用中至关重要。我们还发现，化学多样性对植物生长和繁殖性状的影响是复杂的，并且取决于小区的化学型丰富度。这项长期的田间实验将允许进一步研究植物与昆虫的相互作用以及昆虫群落对种内化学多样性的组装响应。
