Isoprene research – 60 years later, the biology is still enigmatic

Sharkey, Thomas D.; Monson, Russell K.

doi:10.1111/pce.12930

Cited by 87 publications

(82 citation statements)

References 100 publications

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“…Changing climate (e.g., rising CO 2 and temperatures) may lead to significant changes in BVOC emissions (Karl et al, 2010;Loreto & Schnitzler, 2010;Rosenstiel, Potosnak, Griffin, Fall, & Monson, 2003;Sharkey & Monson, 2014). However, the quantitative effects of climate change on BVOCs are still difficult to predict, due to the likely onset of complex feedback and feedforward biochemical mechanisms (Sharkey & Monson, 2017) and interactive effects. To review present knowledge about the complex impact of climate change on BVOC emissions, we performed a meta-analysis of available information.…”

Section: Introductionmentioning

confidence: 99%

Isoprene is more affected by climate drivers than monoterpenes: A meta‐analytic review on plant isoprenoid emissions

Zhu

Yuan

Fares³

et al. 2019

Plant Cell & Environment

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Isoprene and monoterpenes (MTs) are among the most abundant and reactive volatile organic compounds produced by plants (biogenic volatile organic compounds). We conducted a meta‐analysis to quantify the mean effect of environmental factors associated to climate change (warming, drought, elevated CO2, and O3) on the emission of isoprene and MTs. Results indicated that all single factors except warming inhibited isoprene emission. When subsets of data collected in experiments run under similar change of a given environmental factor were compared, isoprene and photosynthesis responded negatively to elevated O3 (−8% and −10%, respectively) and drought (−15% and −42%), and in opposite ways to elevated CO2 (−23% and +55%) and warming (+53% and −23%, respectively). Effects on MTs emission were usually not significant, with the exceptions of a significant stimulation caused by warming (+39%) and by elevated O3 (limited to O3‐insensitive plants, and evergreen species with storage organs). Our results clearly highlight individual effects of environmental factors on isoprene and MT emissions, and an overall uncoupling between these secondary metabolites produced by the same methylerythritol 4‐phosphate pathway. Future results from manipulative experiments and long‐term observations may help untangling the interactive effects of these factors and filling gaps featured in the current meta‐analysis.

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Section: Introductionmentioning

confidence: 99%

Isoprene is more affected by climate drivers than monoterpenes: A meta‐analytic review on plant isoprenoid emissions

Zhu

Yuan

Fares³

et al. 2019

Plant Cell & Environment

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“…Impacts of temperature and other factors (e.g., radiation) on phytogenic VOC production are now relatively well understood at cellular‐to‐leaf scales over relatively short time scales with over half a century of research (Vickers et al. , Loreto and Fineschi , Sharkey and Monson ) since the descriptions in the mid‐20th century by Haagen‐Smit, Went, and colleagues of plant‐derived organic compounds that could contribute to O 3 and haze formation (Haagen‐Smit and Fox , Went ). Ecosystem‐level emissions have been extrapolated from this relatively good understanding of biochemical mechanisms and eco‐physiological regulation via ecosystem models by aggregating vegetation into plant functional types (PFTs).…”

Section: Introductionmentioning

confidence: 99%

Biodiversity matters in feedbacks between climate change and air quality: a study using an individual‐based model

Wang

Shuman

Shugart

et al. 2018

Ecological Applications

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Air quality is closely associated with climate change via the biosphere because plants release large quantities of volatile organic compounds (VOC) that mediate both gaseous pollutants and aerosol dynamics. Earlier studies, which considered only leaf physiology and simply scale up from leaf-level enhancements of emissions, suggest that climate warming enhances whole forest VOC emissions, and these increased VOC emissions aggravate ozone pollution and secondary organic aerosol formation. Using an individual-based forest VOC emissions model, UVAFME-VOC, that simulates system-level emissions by explicitly simulating forest community dynamics to the individual tree level, ecological competition among the individuals of differing size and age, and radiative transfer and leaf function through the canopy, we find that climate warming only sometimes stimulates isoprene emissions (the single largest source of non-methane hydrocarbon) in a southeastern U.S. forest. These complex patterns result from the combination of higher temperatures' stimulating emissions at the leaf level but decreasing the abundance of isoprene-emitting taxa at the community level by causing a decline in the abundance of isoprene-emitting species (Quercus spp.). This ecological effect eventually outweighs the physiological one, thus reducing overall emissions. Such reduced emissions have far-reaching implications for the climate-air-quality relationships that have been established on the paradigm of warming-enhancement VOC emissions from vegetation. This local scale modeling study suggests that community ecology rather than only individual physiology should be integrated into future studies of biosphere-climate-chemistry interactions.

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“…We do not cover the various interactions between photosynthesis (Pn) and BVOC synthesis/emissions, because these have been extensively reviewed recently (e.g. Loreto and Schnitzler 2010;Peñuelas and Staudt 2010;Harrison et al 2013;Fini et al 2017;Sharkey and Monson 2017). As temperate deciduous forests and boreal conifer forests are the dominating forest biomes in Europe (Naudts et al 2016), our examples are predominantly from these environments.…”

Section: Introductionmentioning

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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Isoprene research – 60 years later, the biology is still enigmatic

Cited by 87 publications

References 100 publications

Isoprene is more affected by climate drivers than monoterpenes: A meta‐analytic review on plant isoprenoid emissions

Isoprene is more affected by climate drivers than monoterpenes: A meta‐analytic review on plant isoprenoid emissions

Biodiversity matters in feedbacks between climate change and air quality: a study using an individual‐based model

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

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