Multi-element accumulation near Rumex crispus roots under wetland and dryland conditions.
Rumex crispus was grown under wet and dry conditions in two-chamber columns such that the roots were confined to one chamber by a 21 mum nylon mesh, thus creating a soil-root interface ('rhizoplane'). Element concentrations at 3 mm intervals below the 'rhizoplane' were measured. The hypothesis was that metals accumulate near plant roots more under wetland than dryland conditions. Patterns in element distribution were different between the treatments. Under dryland conditions Al, Ba, Cu, Cr, Fe, K, La, Mg, Na, Sr, V, Y and Zn accumulated in soil closest to the roots, above the 'rhizoplane' only. Under wetland conditions Al, Fe, Cr, K, V and Zn accumulated above as well as 3 mm below the 'rhizoplane' whereas La, Sr and Y accumulated 3 mm below the 'rhizoplane' only. Plants on average produced 1.5 times more biomass and element uptake was 2.5 times greater under wetland compared to dryland conditions.
Kissoon
La Toya T
LT
Wet Ecosystem Research Group, Department of Biological Sciences, North Dakota State University, NDSU Department 2715, P.O. Box 6050 Fargo, ND 58108-6050, USA. latoya.kissoon@ndsu.edu
Jacob
Donna L
DL
Otte
Marinus L
ML
D018517:Plant Roots / Q000737:chemistry / Q000378:metabolism; D031804:Rumex / Q000737:chemistry / Q000378:metabolism*; D012989:Soil Pollutants / Q000032:analysis / Q000378:metabolism*; D014131:Trace Elements / Q000032:analysis / Q000378:metabolism*; D053833:Wetlands
D012989:Soil Pollutants; D014131:Trace Elements