Plants emit an extremely diverse bouquet of volatile organic compounds (VOCs) from their above-ground and below-ground parts. Emissions are constitutive or induced, e.g. by herbivores. VOCs can be classified as highly volatile, semi-volatile compounds. Sesquiterpenes (SQTs) typical (sVOCs) released plants. Similarly, herbivore-induced homoterpenes methyl salicylate also have relatively low volatility. SVOCs a high boiling point (> 240 °C) vapour pressure below 0.005 kPa at 25 °C. Glandular...

Basil (Ocimum basilicum, cv. Dolly) grew under three different light spectra (A, B, and C) created by light-emitting diode lamps. The proportions of UV-A, blue, green-yellow wavelengths decreased linearly from A to C, the red far-red increased C. Photosynthetic photon flux density was 300 μmol m-2 s-1 in all spectra. spectrum C plants had highest concentrations phenolic acids (main compounds: rosmarinic acid cichoric acid), lowest emissions phenylpropanoid eugenol terpenoids linalool...

Biogenic volatile organic compounds (bVOCs), synthesised by plants, are important mediators of ecological interactions that can also undergo a series reactions in the atmosphere. Ground-level ozone is secondary pollutant generated through sunlight-driven between nitrogen oxides (NO

Abstract Brassicaceous plants are attacked by a wealth of specialist herbivores that include the Diamondback moth (DBM) Plutella xylostella L. (Lepidoptera: Plutellidae), control which requires novel biocontrol strategies. DBM is cosmopolitan pest causing damage varies yearly in Finland depending on timing and extent their migration. Intercropping with companion can hamper host location or attract natural enemies. We tested two sustainable plant-based protection strategies field-grown...

Abstract Subarctic vegetation is composed of mountain birch [ Betula pubescens ssp . czerepanovii (MB)] forests with shrubs and other species growing in the understorey. The effects presence density one understorey shrub, Rhododendron tomentosum (RT), on volatile emissions MB, were investigated a Finnish subarctic forest site early late season. Only MB trees an RT-understorey emitted RT-specific sesquiterpenoids, palustrol, ledol aromadendrene. Myrcene, which most abundant RT-monoterpene was...

White cabbage, Brassica oleracea, plants and artificial leaves covered with B. oleracea epicuticular wax were exposed to α-pinene oxidation products formed through the of by ozone (O3) hydroxyl (OH) radicals. O3 OH-induced led formation oxygenated volatile organic compounds (OVOCs) secondary aerosol particles (SOA), referred together as (OP). Exposure cabbage OP deposition re-emission gas-phase plants. In a series 2-choice bioassays, specialist cruciferous herbivore, Plutella xylostella...

Plant volatiles mediate a range of interactions across and within trophic levels, including plant-plant interactions. Volatiles emitted by plant may trigger physiological responses in neighboring plants or adhere to their surfaces, which, turn, affect the herbivory. These are subject chemical reactions during transport air currents, especially polluted atmosphere. We conducted field experiment test for adsorption dispenser-released myrcene on surfaces cabbage effects distance from dispenser...

The perennial evergreen woody shrub, Rhododendron tomentosum, confers associational resistance against herbivory and oviposition on neighbouring plants through passive adsorption of some its constitutively emitted volatile organic compounds (VOCs). process is dependent transport VOCs in the air. In polluted atmospheres, may be degraded impeded. We studied effect elevated ozone regimes R. tomentosum volatiles to white cabbage, Brassica oleracea, specialist herbivore Plutella xylostella...

Since preindustrial times, concentrations of tropospheric ozone, a phytotoxic pollutant, have risen in the Northern Hemisphere. Selective breeding has intentionally modified crop plant traits to improve yield but may altered defenses against abiotic and biotic stresses. This study aims determine if cultivated wild plants respond differently herbivory under elevated ozone. We studied volatile emissions four Brassica rapa ssp. oleifera varieties one population after exposure ozone or Plutella...

Abstract. Neighbouring plants may affect volatile compound emissions of a focal plant and confer associational resistance or susceptibility. Associational has been reported as result adsorption neighbouring semivolatile compounds on foliage in field experiments. However, these effects natural ecosystem remain largely unknown. The the presence density Rhododendron tomentosum (Rt) understorey profile herbivore mountain birch, Betula pubescens ssp. czerepanovii (MB) was investigated subarctic...

Diversification of agroecosystems through mixed cropping can facilitate multiple ecosystem services that may improve yields. Intercrops repel pests and nourish natural enemies while trap crops lure away from target crops. A small-scale agricultural field experiment was conducted in 2018 2020 Finland to study how intercropping brassicaceous plants faba bean (Vicia faba) affects yield quality a crop (white cabbage (Brassica oleracea var. capitata)), herbivory on the crop, effects insect...

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Air pollution is an escalating concern in the modern world, posing substantial threats to ecosystem processes. While importance of comprehending impact pollutants on natural environments evident, conducting rigorous field-based experiments presents formidable challenges. Elevating pollutant concentrations within open air a controlled manner complex. Nonetheless, such real-world are invaluable for revealing genuine influence ecosystems and their functioning. Field-scale measurements have...

Air pollution is an escalating concern in the modern world, posing substantial threats to ecosystems processes. While importance of comprehending impact pollutants on natural environments evident, conducting rigorous field-based experiments presents formidable challenges. Elevating pollutant concentrations within open air a controlled manner complex. Nonetheless, such real-world are invaluable for revealing genuine influence and their functioning. Field-scale measurements have emerged as...

Air pollution is an escalating concern in the modern world, posing substantial threats to ecosystems processes. While importance of comprehending impact pollutants on natural environments evident, conducting rigorous field-based experiments presents formidable challenges. Elevating pollutant concentrations within open air a controlled manner complex. Nonetheless, such real-world are invaluable for revealing genuine influence and their functioning. Field-scale measurements have emerged as...