Quantitative measurements of NO2 uptake and metabolism by sunflower plants

Latus, C.; Förstel, H.; Führ, Fernanda; Neubert, A.; Kley, D.

doi:10.1007/bf01131225

Cited by 13 publications

(4 citation statements)

References 7 publications

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“…6b) and under controlled conditions (Fig. 7c), J NO # was also correlated linearly with the NO # concentrations applied, as observed in other studies (Johansson, 1987 ;Latus et al, 1990 ;Thoene et al, 1991Thoene et al, , 1996Rondo! n et al, 1993).…”

Section: supporting

confidence: 86%

NH₃ and NO₂ fluxes between beech trees and the atmosphere – correlation with climatic and physiological parameters

2000

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The dynamic-chamber technique was used to investigate the correlation between NH $ and NO # fluxes and different climatic and physiological parameters : air temperature ; relative air humidity ; photosynthetic photon fluence rate ; NH $ and NO # concentrations ; transpiration rate ; leaf conductance for water vapour ; and photosynthetic activity. The experiments were performed with twigs from the sun crown of mature beech trees (Fagus sylvatica) at a field site (Ho$ glwald, Germany), and with 12-wk-old beech seedlings under controlled conditions. Both sets of experiments showed that NO # and NH $ fluxes depended linearly on NO # and NH $ concentration, respectively, in the concentration ranges representative for the field site studied, and on watervapour conductance as a measure for stomatal aperture. The NO # compensation point determined in the field studies (the atmospheric NO # concentration with no net NO # flux) was 1n8-1n9 nmol mol −" . The NH $ compensation point varied between 3n3 and 3n5 nmol mol −" in the field experiments, and was 3n0 nmol mol −" in the experiments under controlled conditions. The climatic factors T and PPFR were found to influence both NO # and NH $ fluxes indirectly, by changing stomatal conductance. Whilst NO # flux showed a response to changing relative humidity that could be explained by altered stomatal conductance, increased NH $ flux with increasing relative humidity ( 50 %) depended on other factors. The exchange of NO # between above-ground parts of beech trees and the atmosphere could be explained exclusively by uptake or emission of NO # through the stomata, as indicated by the quotient between measured and predicted NO # conductance of approx. 1 under all environmental conditions examined. Neither internal mesophyll resistances nor additional sinks could be observed for adult trees or for beech seedlings. By contrast, the patterns of NH $ flux could not be explained by an exclusive exchange of NH $ through the stomata. Deposition into additional sinks on the leaf surface, as indicated by an increase in the quotient between measured and predicted NH $ conductance, gained importance in high air humidity, when the stomata were closed or nearly closed and\or when atmospheric NH $ concentrations were high. Although patterns of NH $ gas exchange did not differ between different months or years at high NH $ concentrations (c. 140 nmol mol −" ), it must be assumed that emission or deposition fluxes at low ambient NH $ concentration (0n8 and 4n5 nmol mol −" ) might vary significantly with time because of variation in the NH $ compensation point.

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Section: supporting

confidence: 86%

NH₃ and NO₂ fluxes between beech trees and the atmosphere – correlation with climatic and physiological parameters

2000

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“…A linear correlation between J NO 2 and C NO 2 has also been determined in a number of studies ( Johansson, 1987;Latus et al, 1990;Thoene et al, 1991;Rondón et al, 1993;Thoene et al, 1996, Hereid & Monson, 2001, Sparks et al, 2001. At a given NO 2 concentration between 5 and 25 nmol mol −1 and under comparable environmental conditions, NO 2 deposition flux for adult spruce was in the same range as adult tropical tree species (Sparks et al, 2001) but about 2-fold higher -at comparable g H 2 O -as for young spruce trees under controlled conditions (Thoene et al, 1996).…”

Section: J Nh 3 and J No 2 Are Related Linearly To Trace Gas Concentrmentioning

confidence: 69%

“…NH 3 : Populus euamericana (Van Hove et al ., 1989); Hordeum vulgare ; Husted et al . (1996)); NO 2 : Triticum aestivum (Weber & Rennenberg, 1996); sunflower (Latus et al ., 1990)) under controlled conditions. However, due to the chronically high N‐input into the ecosystem examined (Rennenberg et al ., 1998) and the colonisation of spruce needles with chemolithoautotrophic nitrifiers at this site, which are able to consume NH 3 , NH 4 + and NO 2 − (Papen et al ., 2002), compensation point, internal (mesophyll) resistances and/or cuticular adsorption may differ significantly from those determined under laboratory conditions and with other species in the field.…”

Section: Introductionmentioning

confidence: 99%

“…We wanted to test the hypothesis, that mainly the concentration of trace gas and stomatal conductance determines NH 3 and NO 2 exchange of adult trees in the field as observed in previous studies with spruce (Kesselmeier et al ., 1993;Thoene et al ., 1996) and other species (e.g. NH 3 : Populus euamericana ( Van Hove et al ., 1989); Hordeum vulgare ; ); NO 2 : Triticum aestivum ; sunflower (Latus et al ., 1990)) under controlled conditions. However, due to the chronically high N-input into the ecosystem examined (Rennenberg et al ., 1998) and the colonisation of spruce needles with chemolithoautotrophic nitrifiers at this site, which are able to consume NH 3 , NH 4 + and NO 2 - (Papen et al ., 2002), compensation point, internal (mesophyll) resistances and/or cuticular adsorption may differ significantly from those determined under laboratory conditions and with other species in the field.…”

Section: Introductionmentioning

confidence: 99%

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Stomatal uptake and cuticular adsorption contribute to dry deposition of NH₃ and NO₂ to needles of adult spruce (Picea abies) trees

Geßler¹,

Rienks²,

Rennenberg³

2002

New Phytologist

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Summary• In the present study NH 3 and NO 2 exchange between the atmosphere and needles of adult spruce ( Picea abies ) trees at a field site ('Höglwald') exposed to high loads of atmospheric nitrogen was assessed.• Twigs were fumigated with different NH 3 (C NH 3 ) or NO 2 (C NO 2 ) concentrations using the dynamic chamber technique. Beside fluxes of NH 3 (J NH 3 ) and NO 2 (J NO 2 ), transpiration (J H 2 O ), leaf conductance for water vapour (g H 2 O ), photosynthetic activity (J CO 2 ), photosynthetic photon fluence rate (PPFR), air temperature (T) and relative air humidity (RH) were determined.• Both fluxes, J NH 3 and J NO 2 , depended linearly on C NH 3 and C NO 2 in concentration ranges representative for the field site and g H 2 O as a measure of stomatal aperture. For both trace gases compensation points could be determined amounting to 2.5 nmol mol − 1 for NH 3 and to 1.7 nmol mol − 1 for NO 2 .• The fluxes of NH 3 and NO 2 could not be explained exclusively by exchange through the stomata. In both NH 3 and NO 2 fumigation experiments additional deposition onto the needle surface was observed and increased with increasing C NH 3 and C NO 2 . 15 N [NH 3 ] fumigation experiments with adult spruce trees confirmed the results of gas exchange measurements and revealed that NH 3 -N deposited to spruce needles is subjected to long distance transport within the plant, supplying the plant with additional nitrogen from the atmosphere.

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Uptake and Distribution of NO2 in Norway Spruce (Picea Abies [L.] Karst.)

Brunold

Ballmoos

Nussbaum

et al. 1997

Biosphere-Atmosphere Exchange of Pollutants and Trace Substances

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Quantitative measurements of NO2 uptake and metabolism by sunflower plants

Cited by 13 publications

References 7 publications

NH₃ and NO₂ fluxes between beech trees and the atmosphere – correlation with climatic and physiological parameters

NH₃ and NO₂ fluxes between beech trees and the atmosphere – correlation with climatic and physiological parameters

Stomatal uptake and cuticular adsorption contribute to dry deposition of NH₃ and NO₂ to needles of adult spruce (Picea abies) trees

Uptake and Distribution of NO2 in Norway Spruce (Picea Abies [L.] Karst.)

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Quantitative measurements of NO2 uptake and metabolism by sunflower plants

Cited by 13 publications

References 7 publications

NH3 and NO2 fluxes between beech trees and the atmosphere – correlation with climatic and physiological parameters

NH3 and NO2 fluxes between beech trees and the atmosphere – correlation with climatic and physiological parameters

Stomatal uptake and cuticular adsorption contribute to dry deposition of NH3 and NO2 to needles of adult spruce (Picea abies) trees

Uptake and Distribution of NO2 in Norway Spruce (Picea Abies [L.] Karst.)

Contact Info

Product

Resources

About

NH₃ and NO₂ fluxes between beech trees and the atmosphere – correlation with climatic and physiological parameters

NH₃ and NO₂ fluxes between beech trees and the atmosphere – correlation with climatic and physiological parameters

Stomatal uptake and cuticular adsorption contribute to dry deposition of NH₃ and NO₂ to needles of adult spruce (Picea abies) trees