Skip to Main Content
Distribution and uptake dynamics of mercury in leaves of common deciduous tree species in Minnesota, U.S.A.Author(s): Aicam Laacouri; Edward A. Nater; Randall K. Kolka
Source: Environmental Science & Technology. 47(8): 10462-10470.
Publication Series: Scientific Journal (JRNL)
Station: Northern Research Station
Download Publication (1.12 MB)
DescriptionA sequential extraction technique for compartmentalizing mercury (Hg) in leaves was developed based on a water extraction of Hg from the leaf surface followed by a solvent extraction of the cuticle. The bulk of leaf Hg was found in the tissue compartment (90-96%) with lesser amounts in the surface and cuticle compartments. Total leaf concentrations of Hg varied among species and was most closely correlated with the number of stomates per sample, supporting the hypothesis that stomatal uptake of atmospheric Hg (most likely Hg0) is a potential uptake pathway. Mercury concentrations in leaves were monitored from emergence to senescence and showed a strong positive correlation with leaf age. Leaves accumulated Hg throughout the growing season; the highest uptake rates coincided with periods of high photosynthetic activity. Concentrations of Hg in leaf tissue increased steadily throughout the season, but no such trends were observed for surficial or cuticular accumulation. Factors affecting the variability of Hg in leaves were analyzed to improve protocols for the potential use of leaves as passive monitors of atmospheric Hg. Results show that total leaf Hg concentrations are affected by leaf age and leaf placement in the crown.
- Check the Northern Research Station web site to request a printed copy of this publication.
- Our on-line publications are scanned and captured using Adobe Acrobat.
- During the capture process some typographical errors may occur.
- Please contact Sharon Hobrla, firstname.lastname@example.org if you notice any errors which make this publication unusable.
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationLaacouri, Aicam; Nater, Edward A.; Kolka, Randall K. 2013. Distribution and uptake dynamics of mercury in leaves of common deciduous tree species in Minnesota, USA. Environmental Science & Technology. 47(8): 10462-10470.
- Gaseous mercury fluxes in peatlands and the potential influence of climate change
- New Approaches to Understand Mercury in Trees: Radial and Longitudinal Patterns of Mercury in Tree Rings and Genetic Control of Mercury in Maple Sap
- Processes preventing nocturnal equilibration between leaf and soil water potential in tropical savanna woody species.
XML: View XML