Root porosity and radial oxygen loss related to arsenic tolerance and uptake in wetland plants

Root porosity and radial oxygen loss related to arsenic tolerance and uptake in wetland plants The rates of radial oxygen loss (ROL), root porosity, concentrations of arsenic (As), iron (Fe) and manganese (Mn) in shoot and root tissues and on root surfaces, As tolerances, and their relationships indifferent wetland plants were investigated based on a hydroponic experiment (control, 0.8, 1.6mg AsL1) and a soil pot trail (control, 60mg Askg1). The results revealed that wetland plants showed great differences in root porosity (964%), rates of ROL (551750mmo1 O2kg1 root d.w.d1), As uptake (e.g., 8.8151mgkg1 in shoots in 0.8mg AsL1 treatment), translocation factor (2.147% in 0.8mg AsL1) and tolerance (29106% in 0.8mg AsL1). Wetland plants with higher rates of ROL and root porosity tended to form more Fe/Mn plaque, possess higher As tolerance, higher concentrations of As on root surfaces and a lower As translocation factor so decreasing As toxicity. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Environmental Pollution Elsevier

Root porosity and radial oxygen loss related to arsenic tolerance and uptake in wetland plants

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Publisher
Elsevier
Copyright
Copyright © 2010 Elsevier Ltd
ISSN
0269-7491
D.O.I.
10.1016/j.envpol.2010.09.031
Publisher site
See Article on Publisher Site

Abstract

The rates of radial oxygen loss (ROL), root porosity, concentrations of arsenic (As), iron (Fe) and manganese (Mn) in shoot and root tissues and on root surfaces, As tolerances, and their relationships indifferent wetland plants were investigated based on a hydroponic experiment (control, 0.8, 1.6mg AsL1) and a soil pot trail (control, 60mg Askg1). The results revealed that wetland plants showed great differences in root porosity (964%), rates of ROL (551750mmo1 O2kg1 root d.w.d1), As uptake (e.g., 8.8151mgkg1 in shoots in 0.8mg AsL1 treatment), translocation factor (2.147% in 0.8mg AsL1) and tolerance (29106% in 0.8mg AsL1). Wetland plants with higher rates of ROL and root porosity tended to form more Fe/Mn plaque, possess higher As tolerance, higher concentrations of As on root surfaces and a lower As translocation factor so decreasing As toxicity.

Journal

Environmental PollutionElsevier

Published: Jan 1, 2011

References

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