TY - JOUR
T1 - Root porosity and radial oxygen loss related to arsenic tolerance and uptake in wetland plants
AU - Li, H.
AU - Ye, Z. H.
AU - Wei, Z. J.
AU - Wong, M. H.
N1 - Funding Information:
We sincerely thank Prof. AJM Baker (The University of Melbourne, Australia and University of Sheffield, UK) for improving this manuscript. The present project was supported by the Doctoral Fund of the Ministry of Education in Colleges and University, China (20558097), National Natural Science Fund of China (30570345, 30770417), NSFC-Guangdong United Foundation (U0833004), and the Research Grant Council Hong Kong (HKBU 261407) for financial support.
PY - 2011/1
Y1 - 2011/1
N2 - 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 in different wetland plants were investigated based on a hydroponic experiment (control, 0.8, 1.6 mg As L-1) and a soil pot trail (control, 60 mg As kg-1). The results revealed that wetland plants showed great differences in root porosity (9-64%), rates of ROL (55-1750 mmo1 O2 kg-1 root d.w. d-1), As uptake (e.g., 8.8-151 mg kg-1 in shoots in 0.8 mg As L-1 treatment), translocation factor (2.1-47% in 0.8 mg As L -1) and tolerance (29-106% in 0.8 mg As L-1). 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.
AB - 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 in different wetland plants were investigated based on a hydroponic experiment (control, 0.8, 1.6 mg As L-1) and a soil pot trail (control, 60 mg As kg-1). The results revealed that wetland plants showed great differences in root porosity (9-64%), rates of ROL (55-1750 mmo1 O2 kg-1 root d.w. d-1), As uptake (e.g., 8.8-151 mg kg-1 in shoots in 0.8 mg As L-1 treatment), translocation factor (2.1-47% in 0.8 mg As L -1) and tolerance (29-106% in 0.8 mg As L-1). 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.
KW - Arsenic (As)
KW - Porosity (POR)
KW - Radial oxygen loss (ROL)
KW - Tolerance
KW - Translocation factor
UR - http://www.scopus.com/inward/record.url?scp=78349304688&partnerID=8YFLogxK
U2 - 10.1016/j.envpol.2010.09.031
DO - 10.1016/j.envpol.2010.09.031
M3 - Journal article
C2 - 20970900
AN - SCOPUS:78349304688
SN - 0269-7491
VL - 159
SP - 30
EP - 37
JO - Environmental Pollution
JF - Environmental Pollution
IS - 1
ER -