The fate of methyl salicylate in the environment and its role as signal in multitrophic interactions

The Science of The Total Environment, Journal Year: 2020, Volume and Issue: 749, P. 141406 - 141406

Published: July 31, 2020

Language: Английский

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Diurnal variation in BVOC emission and CO2 gas exchange from above- and belowground parts of two coniferous species and their responses to elevated O3

Environmental Pollution, Journal Year: 2021, Volume and Issue: 278, P. 116830 - 116830

Published: March 9, 2021

Increased tropospheric ozone (O3) concentrations in boreal forests affect the emission of biogenic volatile organic compounds (BVOCs), which play crucial roles biosphere-atmosphere feedbacks. Although it has been well documented that BVOC emissions are altered response to elevated O3, consequent effects on carbon budget have largely unexplored. Here, we studied O3 (80 nmol mol−1) diurnal variation and gas exchange CO2 from above- belowground parts Norway spruce (Picea abies) Scots pine (Pinus sylvestris) further investigated budget. In spring, decreased net photosynthesis rate (Pn) above-ground both species. As a causal relationship with dormancy recovery, O3-induced decreases indicated inhibition recovery. Contrary spring results, summer aboveground were increased Decreases Pn stress. monoterpene main defense response. Elevated had little effect either species or summer. proportion emitted as BVOCs relative assimilated by (the BVOC-C loss) at soil-plant system levels summer, resulted CO2–C loss level pine. During this process, can represent significant fraction between atmosphere spruce, less pronounced. The current results highlight need for prediction their contributions under

Language: Английский

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Methyl Salicylate and Sesquiterpene Emissions Are Indicative for Aphid Infestation on Scots Pine

Forests, Journal Year: 2020, Volume and Issue: 11(5), P. 573 - 573

Published: May 20, 2020

Biotic stresses on forest trees are caused by various pest insects and plant pathogens. Attack these parasites is known to induce the emissions of biogenic volatile organic compounds (BVOCs), profile often differs between infested healthy plants. This difference in emission can be used for non-destructive early-stage diagnosis stressor organism. We studied how phloem feeding a large pine aphid (Cinara pinea Mordvilko) branch bark Scots (Pinus sylvestris L.) affects BVOC compared those plants two experiments. found that aphid-infested plants, methyl salicylate (MeSA) significantly increased, rates were dependent density branch. Aphid infestation did not affect total monoterpene emission, while sesquiterpenes substantially higher saplings than uninfested Sesquiterpene (E, E)-α-farnesene was emitted at increased both experiments, alarm pheromone sesquiterpene (E)-β-farnesene, only experiment with pressure. conclude rapid increase MeSA most reliable indicator together E)-α-farnesene.

Language: Английский

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Diversity and Interrelations Among the Constitutive VOC Emission Blends of Four Broad-Leaved Tree Species at Seedling Stage

Frontiers in Plant Science, Journal Year: 2021, Volume and Issue: 12

Published: Sept. 24, 2021

Volatile organic compounds (VOCs) emitted by plants consist of a broad range gasses which serve purposes such as protecting against herbivores, communicating with insects and neighboring plants, or increasing the tolerance to environmental stresses. Evidence is accumulating that composition VOC blends plays an important role in fulfilling these purposes. Constitutional emissions give insight into species-specific stress potentials are first step linking metabolism function co-occurring VOCs. Here, we investigate blend interrelations among co-emitted VOCs unstressed seedlings four broad-leaved tree species, Quercus robur, Fagus sylvatica, Betula pendula , Carpinus betulus . Q. robur F. sylvatica mainly isoprene monoterpenes, respectively. B. had relatively high sesquiterpene emission; however, it made up only 1.7% its total while spectrum was dominated methanol (∼72%). C. emitting monoterpenes similar amounts compared other casting doubt on frequent classification close-to-zero emitter. Beside major VOCs, 22 could be identified, emission rates compositions varying drastically between species. A principal component analysis species revealed co-release multiple compounds. In particular, new links pathways catabolites were indicated, e.g., correlated methanol, sesquiterpenes (mevalonate pathway), green leaf volatiles (hexanal, hexenyl acetate, hexenal; lipoxygenase pathway). Furthermore, acetone eugenol from Shikimate pathway, relationship has not been described before. Our results thus indicate certain highly interrelated, pointing toward importance improve our understanding rather than targeting dominant only.

Language: Английский

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Effects of elevated ozone and warming on terpenoid emissions and concentrations of Norway spruce depend on needle phenology and age

Tree Physiology, Journal Year: 2022, Volume and Issue: 42(8), P. 1570 - 1586

Published: Feb. 16, 2022

Norway spruce (Picea abies (L.) Karst) trees are affected by ongoing climate change, including warming and exposure to phytotoxic levels of ozone. Non-volatile terpenoids volatile (biogenic organic compounds, BVOCs) protect against biotic abiotic stresses. BVOCs also affect the atmosphere's oxidative capacity. Four-year-old were exposed elevated ozone (EO) (1.4 × ambient) (1.1 °C + ambient air) alone in combination on an open-field site Central Finland. Net photosynthesis, needle terpenoid concentrations BVOC emissions measured four times during experiment's second growing season: after bud opening May, mid-growing season June, maturation August September. Warming increased terpene May due advanced phenology decreased them at end matured current-year needles. Ozone enhanced these effects several compounds. oxygenated sesquiterpenes previous-year Decreased monoterpenes less prominent when combined. A similar interactive treatment response isoprene, camphene, tricyclene α-pinene was observed temperature concentration high. The results suggest long-term may reduce terpenoid-based defence capacity young spruce, but can be most sensitive growth phase (after break), high temperatures or co-occur. Reduced from decrease warmer future, effect EO marginal because reactive minor compounds affected.

Language: Английский

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