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Sci Total Environ

Title:		The fate of methyl salicylate in the environment and its role as signal in multitrophic interactions
Author(s):		Ren Y; McGillen MR; Daele V; Casas J; Mellouki A;
Address:		"Institut de Combustion Aerothermique, Reactivite et Environnement, Centre National de la Recherche Scientifique (ICARE-CNRS), Observatoire des Sciences de l'Univers en region Centre (OSUC), CS 50060, 45071 Orleans cedex02, France. Institut de Combustion Aerothermique, Reactivite et Environnement, Centre National de la Recherche Scientifique (ICARE-CNRS), Observatoire des Sciences de l'Univers en region Centre (OSUC), CS 50060, 45071 Orleans cedex02, France; Le Studium Loire Valley Institute for Advanced Studies, Orleans 45071, France. Institut de Recherche sur la Biologie de l'Insecte, UMR 7261, Universite de Tours, 37200 Tours, France. Institut de Combustion Aerothermique, Reactivite et Environnement, Centre National de la Recherche Scientifique (ICARE-CNRS), Observatoire des Sciences de l'Univers en region Centre (OSUC), CS 50060, 45071 Orleans cedex02, France. Electronic address: mellouki@cnrs-orleans.fr"
Journal Title:		Sci Total Environ
Year:		2020
Volume:		20200731
Issue:
Page Number:		141406 -
DOI:		10.1016/j.scitotenv.2020.141406
ISSN/ISBN:		1879-1026 (Electronic) 0048-9697 (Linking)
Abstract:		"Phytohormones emitted into the atmosphere perform many functions relating to the defence, pollination and competitiveness of plants. To be effective, their atmospheric lifetimes must be sufficient that these signals can be delivered to their numerous recipients. We investigate the atmospheric loss processes for methyl salicylate (MeSA), a widely emitted plant volatile. Simulation chambers were used to determine gas-phase reaction rates with OH, NO(3), Cl and O(3); photolysis rates; and deposition rates of gas-phase MeSA onto organic aerosols. Room temperature rate coefficients are determined (in units of cm(3) molecule(-1) s(-1)) to be (3.20 +/- 0.46) x 10(-12), (4.19 +/- 0.92) x 10(-15), (1.65 +/- 0.44) x 10(-12) and (3.33 +/- 2.01) x 10(-19) for the reactions with OH, NO(3), Cl and O(3) respectively. Photolysis is negligible in the actinic range, despite having a large reported near-UV chromophore. Conversely, aerosol uptake can be competitive with oxidation under humid conditions, suggesting that this compound has a high affinity for hydrated surfaces. A total lifetime of gas-phase MeSA of 1-4 days was estimated based on all these loss processes. The competing sinks of MeSA demonstrate the need to assess lifetimes of semiochemicals holistically, and we gain understanding of how atmospheric sinks influence natural communication channels within complex multitrophic interactions. This approach can be extended to other compounds that play vital roles in ecosystems, such as insect pheromones, which may be similarly affected during atmospheric transport"
Keywords:		Atmospheric chemistry Kinetics Methyl salicylate (MeSA) Multitrophic interactions Odor aerosol transport Phytohormones Simulation chamber;
Notes:		"PubMed-not-MEDLINERen, Yangang McGillen, Max R Daele, Veronique Casas, Jerome Mellouki, Abdelwahid eng Netherlands 2020/08/21 Sci Total Environ. 2020 Dec 20; 749:141406. doi: 10.1016/j.scitotenv.2020.141406. Epub 2020 Jul 31"