研究人员发现，当大型松象甲啃食根部时，苏格兰松幼苗释放的食草动物诱导的植物挥发物（HIPV）可触发邻近同种植物的防御机制。
即使HIPV被氧化形成次生有机气溶胶（SOA）后，这种生物活性仍然存在，表现为接受植物光合作用增强、挥发性防御机制被激活、象甲损害减少。SOA的元素组成和数量可能决定其生物功能。
该研究表明，植物衍生的SOA可以介导植物间的相互作用，突显其在生态系统中的生态重要性。
据了解，生物源SOA可通过植物挥发物在大气中的氧化形成。HIPV能够引发植物防御机制，但在其形成SOA后是否仍具备这种生态功能此前尚不清楚。
附：英文原文
Title: Biogenic secondary organic aerosol participates in plant interactions and herbivory defense
Author: Hao Yu, Angela Buchholz, Iida Pullinen, Silja Saarela, Zijun Li, Annele Virtanen, James D. Blande
Issue&Volume: 2024-09-13
Abstract: Biogenic secondary organic aerosols (SOAs) can be formed from the oxidation of plant volatiles in the atmosphere. Herbivore-induced plant volatiles (HIPVs) can elicit plant defenses, but whether such ecological functions persist after they form SOAs was previously unknown. Here we show that Scots pine seedlings damaged by large pine weevils feeding on their roots release HIPVs that trigger defenses in neighboring conspecific plants. The biological activity persisted after HIPVs had been oxidized to form SOAs, which was indicated by receivers displaying enhanced photosynthesis, primed volatile defenses, and reduced weevil damage. The elemental composition and quantity of SOAs likely determines their biological functions. This work demonstrates that plant-derived SOAs can mediate interactions between plants, highlighting their ecological significance in ecosystems.
DOI: ado6779
Source: https://www.science.org/doi/10.1126/science.ado6779