Volatile organic compounds in the roots and rhizosphere of Pinus spp.

Lin, Chun; Owen, Susan M.; Peñuelas, Josep

doi:10.1016/j.soilbio.2006.11.007

Cited by 107 publications

(108 citation statements)

References 28 publications

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“…Some studies have identified that stems including bark (Sallas et al, 1999; Amin et al, 2012), plant roots and the rhizosphere (Bais et al, 2004; Lin et al, 2007), decomposing litter (Warneke et al, 1999; Leff and Fierer, 2008), and even microorganisms (Schulz and Dickschat, 2007; Korpi et al, 2009; Insam and Seewald, 2010) also release BVOCs contributing to the blend of compounds emitted from natural ecosystems. However, the emissions from soil and belowground plant parts (including roots and rhizomes), are still poorly characterized (Lin et al, 2007; Insam and Seewald, 2010). …”

Section: Introductionmentioning

confidence: 99%

Off-season biogenic volatile organic compound emissions from heath mesocosms: responses to vegetation cutting

et al. 2013

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Biogenic volatile organic compounds (BVOCs) affect both atmospheric processes and ecological interactions. Our primary aim was to differentiate between BVOC emissions from above- and belowground plant parts and heath soil outside the growing season. The second aim was to assess emissions from herbivory, mimicked by cutting the plants. Mesocosms from a temperate Deschampsia flexuosa-dominated heath ecosystem and a subarctic mixed heath ecosystem were either left intact, the aboveground vegetation was cut, or all plant parts (including roots) were removed. For 3–5 weeks, BVOC emissions were measured in growth chambers by an enclosure method using gas chromatography-mass spectrometry. CO2 exchange, soil microbial biomass, and soil carbon and nitrogen concentrations were also analyzed. Vegetation cutting increased BVOC emissions by more than 20-fold, and the induced compounds were mainly eight-carbon compounds and sesquiterpenes. In the Deschampsia heath, the overall low BVOC emissions originated mainly from soil. In the mixed heath, root, and soil emissions were negligible. Net BVOC emissions from roots and soil of these well-drained heaths do not significantly contribute to ecosystem emissions, at least outside the growing season. If insect outbreaks become more frequent with climate change, ecosystem BVOC emissions will periodically increase due to herbivory.

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Section: Introductionmentioning

confidence: 99%

Off-season biogenic volatile organic compound emissions from heath mesocosms: responses to vegetation cutting

et al. 2013

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“…Kainulainen and Holopainen (2002) measured monoterpene concentrations more than 3 mg g -1 (dw) for fresh Scots pine (Pinus sylvestris) needle litter, while the terpenoid concentration in Ponderosa pine (Pinus ponderosa) needle litter were only one tenth of that (Greenberg et al 2012). The monoterpene concentrations in Stone pine (Pinus pinea) roots, instead, were approximately 1 mg g -1 (dw) according to Lin et al (2007). However, measurement of VOC content in conifers is complicated due to resin, which is located in specific organs, resin ducts, and contains substantially higher concentrations of terpenoids than surrounding tissues (Staudt et al 1997).…”

Section: Current Knowledge Of Forest Floor and Soil Voc Production Anmentioning

confidence: 98%

“…For example, soil fungi are known to play an important role in decomposing soil organic matter, but their effect on forest floor VOC fluxes is unknown. Increased monoterpene concentrations in the vicinity of tree trunks (Lin et al 2007) suggest either a greater amount of living roots, a greater amount of leaf and root litter, a higher activity of decomposers or all these together being a strong source of VOCs in the soil close to the trunks. Hellén et al (2006) observed boreal forest floor VOC fluxes peaking in spring and autumn.…”

Section: Current Knowledge Of Forest Floor and Soil Voc Production Anmentioning

confidence: 99%

Exchange of volatile organic compounds in the boreal forest floor

Aaltonen¹

2012

Diss. For.

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Terrestrial ecosystems, mainly plants, emit large amounts of volatile organic compounds (VOCs) into the atmosphere. In addition to plants, VOCs also have less-known sources, such as soil. VOCs are a very diverse group of reactive compounds, including terpenoids, alcohols, aldehydes and ketones. Due to their high reactivity, VOCs take part in chemical reactions in the atmosphere and thus also affect Earth's radiation balance.In this study, chamber and snow gradient techniques for measuring boreal soil and forest floor VOC fluxes were developed. Spatial and temporal variability in fluxes was studied with year-round measurements in the field and the sources of boreal soil VOCs in the laboratory with fungal isolates. Determination of the compounds was performed mass spectrometrically.This study reveals that VOCs from soil are emitted by living roots, above-and belowground litter and microbes. The strongest source appears to be litter, in which both plant residuals and decomposers play a role in the emissions. Temperature and moisture are the most critical physical factors driving VOC fluxes. Since the environment in boreal forests undergoes strong seasonal changes, the VOC flux strength of the forest floor varies markedly during the year, being highest in spring and autumn. The high spatial heterogeneity of the forest floor was also clearly visible in VOC fluxes. The fluxes of trace gases (CO 2 , CH 4 and N 2 O) from soil, which are also related to the soil biological activity and physical conditions, did not correlate with the VOC fluxes.Our results show that emissions of VOCs from the boreal forest floor accounts for as much as several tens of percent, depending on the season, of the total forest ecosystem VOC emissions. This can be utilized in air chemistry models, which are almost entirely lacking the below-canopy compartment.

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“…In addition to the uptake from the atmosphere, the very fast mineralization rates are likely important in shaping the net 340 BVOC emissions from soil. The net BVOC release from soil to the atmosphere in general is low compared to the plant emissions (Peñuelas et al, 2014), but emissions may represent a minor portion of the amount that was excreted by soil microbes (Insam and Seewald, 2010;Garbeva et al, 2014) or by roots (Lin et al, 2007;Delory et al, 2016), produced for example with the purpose of communication. It is thus possible that BVOCs are a significant source of carbon to soil microbes and hence that BVOC formation and degradation may be an important but little recognized part of internal 345 carbon cycling in soil.…”

Section: Page 12mentioning

confidence: 99%

Rapid mineralization of biogenic volatile organic compounds in temperate and Arctic soils

Albers¹,

Kramshøj²,

Rinnan³

2018

Preprint

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Abstract. Biogenic volatile organic compounds (BVOCs) are produced by all life forms. Their release into the atmosphere is important with regards to a number of physical and chemical processes and great effort has been put into determining sources and sinks of these compounds in recent years. Soil microbes as a possible sink for BVOCs in the atmosphere has been suggested, however, experimental evidence for this sink is scarce despite its potentially high importance to both carbon cycling and atmospheric concentrations of these gases. We therefore conducted a study with a number of commonly occurring BVOCs labelled with 14C and modified existing methods to study mineralization of these compounds to 14CO2 in four different top soils. Five of the six BVOCs were rapidly mineralized by microbes in all soils. However, great differences were observed with regards to speed of mineralization, extent of mineralization and variation between soil types. Methanol, benzaldehyde, acetophenone and the oxygenated monoterpene geraniol were mineralized within hours in all soils. The hydrocarbon monoterpene p-cymene was mineralized rapidly in soil from a coniferous forest but slower in soil from and adjacent beech stand while chloroform was mineralized slowly in all soils. From our study it is clear that soil microbes are able to degrade completely BVOCs released by aboveground vegetation as well as BVOCs released by soil microbes and plant roots. In addition to the possible atmospheric implications of this degradation the very fast mineralization rates are likely important in shaping the net BVOC emissions from soil and it is possible that BVOC formation and degradation may be an important but little recognized part of internal carbon cycling in soil.

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Volatile organic compounds in the roots and rhizosphere of Pinus spp.

Cited by 107 publications

References 28 publications

Off-season biogenic volatile organic compound emissions from heath mesocosms: responses to vegetation cutting

Off-season biogenic volatile organic compound emissions from heath mesocosms: responses to vegetation cutting

Exchange of volatile organic compounds in the boreal forest floor

Rapid mineralization of biogenic volatile organic compounds in temperate and Arctic soils

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