Monoterpenes and higher terpenes may inhibit enzyme activities in boreal forest soil

Adamczyk, Sylwia; Adamczyk, Bartosz; Kitunen, Veikko; Smolander, Aino

doi:10.1016/j.soilbio.2015.04.006

Cited by 44 publications

(36 citation statements)

References 48 publications

(60 reference statements)

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“…Soil can also be a sink for isoprenoids (Insam and Seewald, 2010;Peñuelas et al, 2014), as some decomposers will also use VOCs as a carbon source (Greenberg et al, 2012). Soil enzymes can release substrates for metabolic VOC production (Mancuso et al, 2015), but isoprenoids can also inhibit enzyme activity in boreal forest soil (Adamczyk et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Contribution of understorey vegetation and soil processes to boreal forest isoprenoid exchange

et al. 2017

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Abstract. Boreal forest floor emits biogenic volatile organic compounds (BVOCs) from the understorey vegetation and the heterogeneous soil matrix, where the interactions of soil organisms and soil chemistry are complex. Earlier studies have focused on determining the net exchange of VOCs from the forest floor. This study goes one step further, with the aim of separately determining whether the photosynthesized carbon allocation to soil affects the isoprenoid production by different soil organisms, i.e., decomposers, mycorrhizal fungi, and roots. In each treatment, photosynthesized carbon allocation through roots for decomposers and mycorrhizal fungi was controlled by either preventing root ingrowth (50 µm mesh size) or the ingrowth of roots and fungi (1 µm mesh) into the soil volume, which is called the trenching approach. Isoprenoid fluxes were measured using dynamic (steady-state flow-through) chambers from the different treatments. This study aimed to analyze how important the understorey vegetation is as a VOC sink. Finally, a statistical model was constructed based on prevailing temperature, seasonality, trenching treatments, understory vegetation cover, above canopy photosynthetically active radiation (PAR), soil water content, and soil temperature to estimate isoprenoid fluxes. The final model included parameters with a statistically significant effect on the isoprenoid fluxes. The results show that the boreal forest floor emits monoterpenes, sesquiterpenes, and isoprene. Monoterpenes were the most common group of emitted isoprenoids, and the average flux from the non-trenched forest floor was 23 µg m −2 h −1 . The results also show that different biological factors, including litterfall, carbon availability, biological activity in the soil, and physico-chemical processes, such as volatilization and absorption to the surfaces, are important at various times of the year. This study also discovered that understorey vegetation is a strong sink of monoterpenes. The statistical model, based on prevailing temperature, seasonality, vegetation effect, and the interaction of these parameters, explained 43 % of the monoterpene fluxes, and 34-46 % of individual α-pinene, camphene, β-pinene, and 3 -carene fluxes.

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Section: Introductionmentioning

confidence: 99%

Contribution of understorey vegetation and soil processes to boreal forest isoprenoid exchange

et al. 2017

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“…Hilli et al (2012) have shown that polyphenols and carbohydrate-derived compounds constitute major components of tree litter and organic soil layers in both the pine and spruce-dominated boreal sites in Finland. Several studies have also shown that phenolic compounds originating from deciduous and coniferous trees have the capacity to influence nutrient mineralization and enzymatic activities and constitute one major mechanisms by which tree species and associated organic matter quality affects carbon decomposition in boreal soils (Adamczyk et al 2009(Adamczyk et al , 2013(Adamczyk et al , 2015.…”

Section: Discussionmentioning

confidence: 99%

Boreal tree species affect soil organic matter composition and saprotrophic mineralization rates

et al. 2019

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Aims To investigate how different tree species affect the composition of SOM and its mineralization in boreal forest ecosystems. Methods We used pyrolysis GC-MS for molecularlevel characterization of the SOM formed under five common boreal tree species at a replicated field exper-iment~50years after plantation. We incubated soil samples at 4, 9, 14 and 19°C and measured inherent CO 2 production and substrate-induced respiration. We then evaluated if the saprotrophic microbial activity and its temperature sensitivity was controlled by the SOM composition.Results The molecular composition of the SOM emerged as key factor influencing SOM properties in plots with different tree species. Most of the variance in the SOM content was explained by the organo-chemical composition of the SOM. More importantly, the fraction of the microbial community able to utilize the native SOM was largely controlled by the SOM organochemical composition. Temperature sensitivity of CO 2 production (Q 10 ) was not explained by SOM composition. However, the microbial access to different SOM pools varied with temperature. Conclusions These results bridge the gap between the paradigms of short-term litter and long-term SOM decomposition showing that, on an intermediate timescale (~50 years), boreal tree species affect SOM molecular composition and saprotrophic mineralization rates.

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“…Plant roots secrete or emit a vast array of compounds into the rhizosphere including non-volatile exudates, such as organic acids, but also BVOCs (Steeghs et al 2004;Lin et al 2007;Rasheed et al 2017;Tiiva et al 2019). Root MTs may have inhibiting effect on the activity of methanotrophic bacteria (Maurer et al 2008) or other soil microbes (Adamczyk et al 2015); in contrast, they may also become mineralised by microbiota (Maurer et al 2008). MTs emitted within the soil profile, either by roots or by decaying biomass, may enhance the biodegradation of various organic pollutants (Rhodes et al, 2007).…”

Section: Bvocs Of Rhizosphere Litter and Understorymentioning

confidence: 99%

Unravelling the functions of biogenic volatiles in boreal and temperate forest ecosystems

et al. 2019

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Living trees are the main source of biogenic volatile organic compounds (BVOCs) in forest ecosystems, but substantial emissions originate from leaf and wood litter, the rhizosphere and from microorganisms. This review focuses on temperate and boreal forest ecosystems and the roles of BVOCs in ecosystem function, from the leaf to the forest canopy and from the forest soil to the atmosphere level. Moreover, emphasis is given to the question of how BVOCs will help forests adapt to environmental stress, particularly biotic stress related to climate change. Trees use their vascular system and emissions of BVOCs in internal communication, but emitted BVOCs have extended the communication to tree population and whole community levels and beyond. Future forestry practices should consider the importance of BVOCs in attraction and repulsion of attacking bark beetles, but also take an advantage of herbivore-induced BVOCs to improve the efficiency of natural enemies of herbivores. BVOCs are extensively involved in ecosystem services provided by forests including the positive effects on human health. BVOCs have a key role in ozone formation but also in ozone quenching. Oxidation products form secondary organic aerosols that disperse sunlight deeper into the forest canopy, and affect cloud formation and ultimately the climate. We also discuss the technical side of reliable BVOC sampling of forest trees for future interdisciplinary studies that should bridge the gaps between the forest sciences, health sciences, chemical ecology, conservation biology, tree physiology and atmospheric science.

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Monoterpenes and higher terpenes may inhibit enzyme activities in boreal forest soil

Cited by 44 publications

References 48 publications

Contribution of understorey vegetation and soil processes to boreal forest isoprenoid exchange

Contribution of understorey vegetation and soil processes to boreal forest isoprenoid exchange

Boreal tree species affect soil organic matter composition and saprotrophic mineralization rates

Unravelling the functions of biogenic volatiles in boreal and temperate forest ecosystems

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