[pam-users] Yu et al, Science, 2024

[pam-users]

Yu, Hao, Buchholz, Angela, Pullinen, Iida, Saarela, Silja, Li, Zijun, Virtanen, Annele, Blande, James D., Biogenic secondary organic aerosol participates in plant interactions and herbivory defense, Science, 385, 6714, 1225-1230, https://doi.org/10.1126/science.ado6779, 2024

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. Plants release volatiles in response to herbivory, and these chemicals can act as cues for nearby plants to initiate chemical defenses to herbivores. However, volatiles can quickly oxidize into secondary organic aerosols (SOAs). Yu et al. found that SOAs, which can persist longer than the original volatiles, also serve as signals for neighboring plants. Volatiles produced by pine seedlings in response to underground feeding by weevils and their resulting SOAs induced responses in neighboring seedlings, including heightened defenses, less herbivore damage, and higher photosynthesis. The relevance of SOAs for plant-plant interactions has thus been underestimated.

PAM Wiki - Publications Using the PAM Oxidation Flow Reactor (google.com)<https://sites.google.com/site/pamwiki/publications-using-the-pam-oxidation-flow-reactor?authuser=0>

Andrew Lambe
Principal Scientist
Aerodyne Research, Inc.

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