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Type: Journal article
Title: Effects of iron and manganese plaques on arsenic uptake by rice seedlings (Oryza sativa L.) grown in solution culture supplied with arsenate and arsenite
Author: Liu, W.
Zhu, Y.
Smith, F.
Citation: Plant and Soil: international journal on plant-soil relationships, 2005; 277(1-2):127-138
Publisher: Kluwer Academic Publ
Issue Date: 2005
ISSN: 0032-079X
Statement of
W.-J. Liu, Y.-G. Zhu and F.A. Smith
Abstract: We have shown previously that phosphorus nutrition and iron plaque on the surface of rice roots influence arsenate uptake and translocation by rice in hydroponic culture. We have now investigated the role of iron (Fe) and manganese (Mn) plaque on arsenate and arsenite uptake and translocation in rice seedlings grown hydroponically. Fe and Mn plaques were clearly visible as reddish or brown coatings on the root surface after 12 h induction, and Fe plaque was much more apparent than Mn plaque. Arsenite or arsenate supply did not decrease plant dry weights significantly. There were significant differences in shoot dry weights but little difference in root dry weights between some plaque treatments. Arsenic (As) concentrations in Fe plaque when arsenate was supplied were significantly higher than those in no plaque (control) and Mn plaque treatments, and much higher than those supplied with arsenite. This showed that Fe plaque on the rice root had higher affinity to arsenate than to arsenite. In Fe plaque treatment, the results indicated that most As was sequestered in roots when arsenite was supplied and most As concentrated in Fe plaque when arsenate was supplied. Most As was accumulated in rice roots in Mn plaque and no plaque treatments for both As species. © Springer 2005.
Keywords: arsenate
arsenic uptake and translocation
iron plaque
manganese plaque
Rights: © Springer 2005
DOI: 10.1007/s11104-005-6453-4
Appears in Collections:Aurora harvest
Soil and Land Systems publications

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