Ozone induced emissions of biogenic VOC from tobacco: relationships between ozone uptake and emission of LOX products

Beauchamp, Jonathan; Wisthaler, Armin; Hansel, Armin; Kleist, E.; Miebach, M.; Niinemets, Ülo; Schurr, Uli; Wildt, Jürgen

doi:10.1111/j.1365-3040.2005.01383.x

Cited by 162 publications

(212 citation statements)

References 34 publications

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“…During the first measurement period (7-14 May 2007) concentrations of all species were highest during the first few days. Methanol emissions are known to be influenced by abiotic stress factors such as elevated ozone levels, drought, flooding and mechanical leaf wounding (Fukui and Doskey, 1998;Holzinger et al, 2000;Beauchamp et al, 2005;Karl et al, 2005;Loreto et al 2006;Brunner et al, 2007;Penuelas et al, 2005) as well as leaf age, with higher emissions typical of young developing leaves (Nemecek-Marshall et al, 1995). BVOC emissions, in particular of methanol are strongly dependent on water soil content and photosynthesis.…”

Section: Identification Of Bvocsmentioning

confidence: 99%

Concentrations and fluxes of biogenic volatile organic compounds above a Mediterranean macchia ecosystem in western Italy

et al. 2009

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Abstract. Emission rates and concentrations of biogenic volatile organic compounds (BVOCs) were measured at a Mediterranean coastal site at Castelporziano, approximately 25 km south-west of Rome, between 7 May and 3 June 2007, as part of the ACCENT-VOCBAS field campaign on biosphere-atmosphere interactions. Concentrations and emission rates were measured using the disjunct eddy covariance (DEC) method utilizing three different proton transfer reaction mass spectrometers (PTR-MS) so allowing a comparison between the instruments. The high resolution data from the PTR-MS instruments considerably enhances the original BEMA measurements of the mid 1990s.Depending on the measurement period, the volume mixing ratios were in the range 1.6-3.5 ppbv for methanol, 0.44-1.3 ppbv for acetaldehyde, 0.96-2.1 ppbv for acetone, 0.10-0.14 ppbv for isoprene, and 0.13-0.30 ppbv for monoterpenes. A diurnal cycle in mixing ratios was apparent with daytime maxima for methanol, acetaldehyde, acetone, and isoprene. The fluxes ranged from 370-440 µg m −2 h −1 for methanol, 180-360 µg m −2 h −1 for acetaldehyde, 180-450 µg m −2 h −1 for acetone, 71-290 µg m −2 h −1 for isoprene, and 240-860 µg m −2 h −1 for monoterpenes. From the measured flux data (7 May-3 June) an average basal emission rate for the Macchia vegetation was calculated

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Section: Identification Of Bvocsmentioning

confidence: 99%

Concentrations and fluxes of biogenic volatile organic compounds above a Mediterranean macchia ecosystem in western Italy

et al. 2009

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“…Among the newest technologies to detect VOCs is the PTR-MS which is a very sensitive technique (pptv level) that allows online VOC measurements (Hansel et al 1995;Lindinger et al 1998) and that may be combined with time-of-flight (TOF) for higher mass resolution and other methods like gas chromatography. The PTR-MS technique has so far been used for the detection of mVOCs in food quality control (Mayr et al 2003a, b), organic waste decomposition (Mayrhofer et al 2006), various soils (Schade and Custer 2004;Asensio et al 2007a, b;Seewald 2008;Seewald et al 2010), and for several other habitats (e.g., Kreuzwieser et al 2002;Karl et al 2003;Grabmer et al 2004;Beauchamp et al 2005). The main benefit of PTR-MS is its high sensitivity that allows online measurement of any air or gas sample.…”

Section: Techniques For Measuring Vocsmentioning

confidence: 99%

Volatile organic compounds (VOCs) in soils

2010

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Soils may act as sources or sinks of volatile organic compounds (VOCs). Many of the formed VOCs are produced by microorganisms, and it would be a challenge to investigate soil microbial communities by studying their VOC profile. Such "volatilomics" would have the advantage of avoiding extraction steps that are often a limit in genomic or proteomic approaches. Abundant literature on microbially produced VOCs is available, and in particular novel detection methods allow additional insight. The aim of this paper was to give an overview on the current knowledge of microbial VOC emissions from soils.

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“…We focused the attention on the release of products of volatile organic compounds produced by the octadecanoid pathway of membrane lipoxidation under stress conditions (LOX products). As demonstrated previously (Beauchamp et al, 2005), the total amount of LOX products emitted can be estimated by summing the signals obtained for the molecular ion and the main fragment of (Z)-3-hexenal (mass 99 and 81) and (Z)-3-hexenol 1 (E)-2-hexenol (mass 101 and 83). In order to increase proton transfer reaction mass spectrometry sensitivity for these LOX compounds, all of the analyses were performed at low ionization energy (approximately 90 Td) using mass 37 (H 2 O*H 3 O 1 ) as a primary ion source.…”

Section: Lox Product Emission Measurementsmentioning

confidence: 99%

In Situ Investigation of Leaf Water Status by Portable Unilateral Nuclear Magnetic Resonance

et al. 2009

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A portable unilateral nuclear magnetic resonance (NMR) instrument was used to detect in field conditions the water status of leaves of herbaceous crops (Zea mays, Phaseolus vulgaris), mesophyllous trees (Populus nigra), and natural Mediterranean vegetation characterized by water-spending shrubs (Cistus incanus) and water-saving sclerophyllous trees (Quercus ilex). A good relationship was observed between NMR signal, leaf relative water content, and leaf transpiration in herbaceous leaves undergoing fast dehydration or slowly developing a drought stress. A relationship was also observed between NMR signal and water potential of Populus leaves during the development of a water stress and when leaves recovered from the stress. In the natural vegetation, the relationship between NMR signal and water status was found in Cistus, the species characterized by high transpiration rates, when measured during a drought stress period and after a rainfall. In the case of the sclerophyllous Quercus, the NMR signal, the relative water content, and the transpiration rate did not change at different leaf water status, possibly because a large amount of water is compartmentalized in cellular structures and macromolecules. The good association between NMR signal and relative water content was lost in leaves exposed for 24 h to dehydration or to an osmotic stress caused by polyethylene glycol feeding. At this time, the transverse relaxation time became longer than in leaves maintained under optimal water conditions, and two indicators of membrane damage, the ion leakage and the emission of products of membrane lipoxygenation [(Z)-3-hexenal, (Z)-3-hexenol, and (E)-2-hexenol], increased. These results taken all together give information on the physiological state of a leaf under a developing stress and show the usefulness of the NMR instrumentation for screening vegetation health and fitness in natural and cultivated conditions. It is concluded that the portable unilateral NMR instrument may be usefully employed in field conditions to monitor nondestructively the water status of plants and to assist agricultural practices, such as irrigation scheduling, to minimize stomatal closure and the consequent limitation to plant production.

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Ozone induced emissions of biogenic VOC from tobacco: relationships between ozone uptake and emission of LOX products

Abstract: ABSTRACT

Cited by 162 publications

References 34 publications

Concentrations and fluxes of biogenic volatile organic compounds above a Mediterranean macchia ecosystem in western Italy

Concentrations and fluxes of biogenic volatile organic compounds above a Mediterranean macchia ecosystem in western Italy

Volatile organic compounds (VOCs) in soils

In Situ Investigation of Leaf Water Status by Portable Unilateral Nuclear Magnetic Resonance

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