Absorption of atmospheric NO<sub>2</sub> by spruce (<i>Picea abies</i> L. Karst.) trees

Thoene, Barbara; Schröder, Peter; Papen, H.; Egger, A.; Rennenberg, Heinz

doi:10.1111/j.1469-8137.1991.tb00962.x

Cited by 107 publications

(101 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Our observations support past studies that have reported the dependence of NO 2 uptake rate on stomatal conductance (Johansson 1987;Rondon et al 1993;Thoene et al 1991;Weber and Rennenberg 1996). However, we only observed evidence of stomatal control when conductances were below 0.5 mol m -2 s -1 (Fig.…”

Section: Discussionsupporting

confidence: 80%

“…3), which is consistent with previous studies (Johansson 1987;Rondon et al 1993;Thoene et al 1991; Each data point represents a single measurement tance to NO 2 assimilation or emission exists within the mesophyll tissue. Possible internal resistances include the disproportionation reaction of NO 2 in the apoplast and scavenging of NO 2 in the leaf apoplast by ascorbate or other free-radical scavenging compounds.…”

Section: Discussionsupporting

confidence: 75%

“…The mechanisms controlling NO 2 emission from leaves are not well understood. However, previous studies have correlated NO 2 exchange rate to nitrate/nitrite reductase activity (Klepper 1991) and stomatal conductance (Johansson 1987;Thoene et al 1991;Weber and Rennenberg 1996). Our data indicate NO 2 emission in these species is generally related to leaf N concentration (Fig.…”

Section: Discussionmentioning

confidence: 47%

“…Controls over the uptake of NO 2 by plant leaves are associated with the diffusive process, reflecting the interplay between the NO 2 concentration gradient between the atmosphere and the intercellular air spaces of the leaf and the stomatal conductance to NO 2 transport (Johansson 1987;Thoene et al 1991;Weber and Rennenberg 1996). Plant emission of NO 2 at low atmospheric concentrations has also been observed, indicating the existence of an NO 2 compensation point (Johansson 1987;Rondon et al 1993;Weber and Rennenberg 1996;Wildt et al 1997).…”

Section: Introductionmentioning

confidence: 97%

See 3 more Smart Citations

Leaf uptake of nitrogen dioxide (NO2) in a tropical wet forest: implications for tropospheric chemistry

et al. 2001

View full text Add to dashboard Cite

Tropical forest soils are known to emit large amounts of reactive nitrogen oxide compounds, often referred to collectively as NO y (NO y = NO + NO 2 + HNO 3 + organic nitrates). Plants are known to assimilate and emit NO y and it is therefore likely that plant canopies affect the atmospheric concentration of reactive nitrogen compounds by assimilating or emitting some fraction of the soil-emitted NO y . It is crucial to understand the magnitude of the canopy effects and the primary environmental and physiological controls over NO y exchange in order to accurately quantify regional NO y inventories and parameterize models of tropospheric photochemistry. In this study we focused on nitrogen dioxide (NO 2 ), which is the component of NO y that most directly catalyzes the chemistry of O 3 dynamics, one of the most abundant oxidative species in the troposphere, and which has been reported as the NO y species that is most readily exchanged between plants and the atmosphere. Leaf chamber measurements of NO 2 flux were measured in 25 tree species growing in a wet tropical forest in the Republic of Panama. NO 2 was emitted to the atmosphere at ambient NO 2 concentrations below 0.53-1.60 ppbv (the NO 2 compensation point) depending on species, with the highest rate of emission being 50 pmol m -2 s -1 at <0.1 ppbv. NO 2 was assimilated by leaves at ambient NO 2 concentrations above the compensation point, with the maximum observed uptake rate being 1,550 pmol m -2 s -1 at 5 ppbv. No seasonal variation in leaf NO 2 flux was observed in this study and leaf emission and uptake appeared to be primarily controlled by leaf nitrogen and stomatal conductance, respectively. When scaled to the entire canopy, soil NO emission rates to the atmosphere were estimated to be maximally altered ±19% by the overlying canopy.

show abstract

Section: Discussionsupporting

confidence: 80%

Section: Discussionsupporting

confidence: 75%

Section: Discussionmentioning

confidence: 47%

Section: Introductionmentioning

confidence: 97%

See 2 more Smart Citations

Leaf uptake of nitrogen dioxide (NO2) in a tropical wet forest: implications for tropospheric chemistry

et al. 2001

View full text Add to dashboard Cite

show abstract

“…The distribution of N assimilation between the roots and the shoot of trees might depend on the species (Truax et al, 1994), the N supply in the soil, the capacity of root nitrate reductase in relation to N uptake (Gojon et al, 1994), and atmospheric uptake of NO x and NH $ (Wellburn, 1990 ;Thoene et al, 1991, Pe! rez-Soba et al, 1994.…”

Section: mentioning

confidence: 99%

Soluble N compounds in trees exposed to high loads of N: a comparison between the roots of Norway spruce (Picea abies) and beech (Fagus sylvatica) trees grown under field conditions

et al. 1998

Self Cite

View full text Add to dashboard Cite

During the growing session of 1995, the total soluble non‐protein nitrogen (TSNN) composition and contents of mycorrhizal fine roots, xylem sap and phloem exudates of roots from a coniferous (Picea abies L.(Karst)) and a deciduous (Fagus sylvatica L.) tree species were analysed at a field site (‘Höglwald’, Germany) exposed to high loads of N. In April, TSNN in fine roots of spruce and beech trees amounted to 16 μmol N g−1 f. wt and 23·3 μmol N g−1 f. wt, respectively. It decreased to 9·2 μmol N g−1 f. wt and 18·1 μmol N g−1 f. wt, respectively, after bud break in June. The seasonal maximum of TSNN in fine roots of spruce was observed in July (32·7 μmol N g−1 f. wt) followed by a decline of c. 30% until the end of the growing season in September. TSNN in fine roots of beech trees showed a further decline between June and July, when its seasonal minimum was determined (15·6 μmol N g−1 f. wt), and increased to c. 29 μmol N g−1 f. wt until September. In spruce roots Gln and Arg were the most abundant TSNN compounds during the entire growing season. In roots of beech Asn played an important role alongside Gln and Arg, especially in April, when it was the most abundant TSNN compound. Other proteinogenic and non‐proteinogenic N compounds comprised c. 20–30% of TSNN. Nitrate made up <1%, and ammonium <7% of TSNN in the fine roots of both species. In April, TSNN in the xylem sap of roots of spruce and beech trees amounted to 3·4 and 8·6 μmol N ml−1, respectively. In roots of spruce trees xylem sap TSNN increased after bud break up to 12·7 μmol N ml−1 in July. At the end of the growing season TSNN had declined again to 3·9 μmol N ml−1. TSNN in the root xylem sap of beech trees decreased after bud break until July (2·4 μmol N ml−1 in July) followed by a slight increase until September (2·9 μmol N ml−1). Arg, Gln and Asp were the most abundant TSNN compounds in the xylem sap of spruce trees contributing together c. 90% to TSNN. The same TSNN compounds prevailed in the root xylem sap of beech trees in April and July, whereas in June and September Asp was replaced by Asn comprising 57% of TSNN in June. In addition to the N compounds mentioned above, a number of other proteinogenic and non‐proteinogenic amino compounds were found in root xylem sap of both species. In either species, nitrate and ammonium were present in small amounts, contributing <1% and <4% to TSNN, respectively. Apparently, inorganic N taken up by the mycorrhizal roots is mainly assimilated in root tissues or by the mycorrhiza and N uptake by the roots is largely adapted to the assimilatory capacity of this organ. In phloem exudates of spruce roots, TSNN amounted to 10·7 μmol N g−1 f. wt in April, increased in June to 23·4 μmol N g−1 f. wt and decreased again until September to a seasonal minimum of 4·8 μmol N g−1 f. wt. In contrast to spruce, TSNN content in phloem exudates of beech roots showed a seasonal maximum (c. 20 μmol N g−1 f. wt) in April with a subsequent decrease in June after bud break (c. 2 μmol N g−1 f. wt). A fourfold increase in July was foll...

show abstract

Forests and the Atmosphere

Jarvis¹,

Fowler²

The Forests Handbook, Volume 1

View full text Add to dashboard Cite

Absorption of atmospheric NO₂ by spruce (Picea abies L. Karst.) trees

Cited by 107 publications

References 45 publications

Leaf uptake of nitrogen dioxide (NO2) in a tropical wet forest: implications for tropospheric chemistry

Leaf uptake of nitrogen dioxide (NO2) in a tropical wet forest: implications for tropospheric chemistry

Soluble N compounds in trees exposed to high loads of N: a comparison between the roots of Norway spruce (Picea abies) and beech (Fagus sylvatica) trees grown under field conditions

Forests and the Atmosphere

Contact Info

Product

Resources

About

Absorption of atmospheric NO2 by spruce (Picea abies L. Karst.) trees

Cited by 107 publications

References 45 publications

Leaf uptake of nitrogen dioxide (NO2) in a tropical wet forest: implications for tropospheric chemistry

Leaf uptake of nitrogen dioxide (NO2) in a tropical wet forest: implications for tropospheric chemistry

Soluble N compounds in trees exposed to high loads of N: a comparison between the roots of Norway spruce (Picea abies) and beech (Fagus sylvatica) trees grown under field conditions

Forests and the Atmosphere

Contact Info

Product

Resources

About

Absorption of atmospheric NO₂ by spruce (Picea abies L. Karst.) trees