Plants of the herbaceous-shrub layer in Specially Protected Natural Area the Osinskaya lesnaya dacha as a source of reactive volatile organic compounds

In order to further assess the contribution of volatile emissions from herbaceous-shrub layer plants to the total amount of volatile organic compounds (VOCs) in the atmospheric ground layer, the qualitative composition of VOCs was determined for nine plant species (Ledum palustre L., Arctostaphylos uva-ursi (L.) Spreng, Vaccinium myrtillus L., Oxycoccus palustris Pers., Rubus saxatilis L., Chimaphila umbellatа (L.) W. Barton, Aegorodium podagraria L., Asarum europaeum L., Lycopodium complanatum L.) selected from the Osinskaya Lesnaya Dacha specially protected natural area. Based on the results of chemical analysis, more than 100 different organic compounds of nine classes were identified. Terpenes were identified as the main emission source. They are highly reactive and able to participate in radical gas-phase oxidation processes. Based on the results of the study, we performed a comparative analysis of the volatile organic compounds emitted by Vaccinium myrtillus L., Chimaphila umbellata (L.) W. Barton, and Asarum europaeum L. with all specimens collected from the same location in May, with a two-year interval between sampling events. A significant difference was noted in the composition of monoterpenes and sesquiterpenes emitted by these plant groups.