Transport of DMAA and MMAA into rice (Oryza sativa L.) roots

Rahman, MA; Kadohashi, K; Maki, T; Hasegawa, H

Transport of DMAA and MMAA into rice (Oryza sativa L.) roots

Rahman, MA

Kadohashi, K Maki, T Hasegawa, H

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Publication Type:: Journal Article
Citation:: Environmental and Experimental Botany, 2011, 72 (1), pp. 41 - 46
Issue Date:: 2011-08-01

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Field	Value	Language
dc.contributor.author	Rahman, MA https://orcid.org/0000-0002-8065-0286	en_US
dc.contributor.author	Kadohashi, K	en_US
dc.contributor.author	Maki, T	en_US
dc.contributor.author	Hasegawa, H	en_US
dc.date.issued	2011-08-01	en_US
dc.identifier.citation	Environmental and Experimental Botany, 2011, 72 (1), pp. 41 - 46	en_US
dc.identifier.issn	0098-8472	en_US
dc.identifier.uri	http://hdl.handle.net/10453/18001
dc.description.abstract	Arsenate (As(V)) transport into plant cells has been well studied. A study on rice (Oryza sativa L.) showed that arsenite is transported across the plasma membrane via glycerol transporting channels. Previous studies reported that the dimethylarsinic acid (DMAA) and monomethylarsonic acid (MMAA) uptake in duckweed (Spirodela polyrhiza L.) differed from that of As(V), and was unaffected by phosphate (H2PO4). This article reports the transport mechanisms of DMAA and MMAA in rice roots. Linear regression analysis showed that the DMAA and MMAA uptake in rice roots increased significantly (p≤0.0002 and ≤0.0001 for DMAA and MMAA, respectively) with the increase of exposure time. Concentration-dependent influx of DMAA and MMAA showed that the uptake data were well described by Michaelis-Menten kinetics. The MMAA influx was higher than that of DMAA. The DMAA and MMAA uptake in rice roots were decreased significantly (p≤0.0001 and ≤0.0077 for DMAA and MMAA, respectively) with the increase of glycerol concentration indicating that DMAA and MMAA were transported into rice roots using the same mechanisms of glycerol. Glycerol is transported into plant cells by aquaporins, and DMAA and MMAA are transported in a dose-dependent manner of glycerol which reveals that DMAA and MMAA are transported into rice roots through glycerol transporting channels. The DMAA and MMAA concentration in the solution did not affect the inhibition of their uptake rate by glycerol. © 2010 Elsevier B.V.	en_US
dc.relation.ispartof	Environmental and Experimental Botany	en_US
dc.relation.isbasedon	10.1016/j.envexpbot.2010.02.004	en_US
dc.subject.classification	Plant Biology & Botany	en_US
dc.title	Transport of DMAA and MMAA into rice (Oryza sativa L.) roots	en_US
dc.type	Journal Article
utslib.citation.volume	1	en_US
utslib.citation.volume	72	en_US
utslib.for	0502 Environmental Science and Management	en_US
utslib.for	0703 Crop and Pasture Production	en_US
utslib.for	05 Environmental Sciences	en_US
utslib.for	06 Biological Sciences	en_US
utslib.for	07 Agricultural and Veterinary Sciences	en_US
dc.location.activity	Auckland, New Zealand
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Science
pubs.organisational-group	/University of Technology Sydney/Faculty of Science/School of Life Sciences
utslib.copyright.status	open_access
pubs.issue	1	en_US
pubs.publication-status	Published	en_US
pubs.volume	72	en_US

Abstract:

Arsenate (As(V)) transport into plant cells has been well studied. A study on rice (Oryza sativa L.) showed that arsenite is transported across the plasma membrane via glycerol transporting channels. Previous studies reported that the dimethylarsinic acid (DMAA) and monomethylarsonic acid (MMAA) uptake in duckweed (Spirodela polyrhiza L.) differed from that of As(V), and was unaffected by phosphate (H2PO4). This article reports the transport mechanisms of DMAA and MMAA in rice roots. Linear regression analysis showed that the DMAA and MMAA uptake in rice roots increased significantly (p≤0.0002 and ≤0.0001 for DMAA and MMAA, respectively) with the increase of exposure time. Concentration-dependent influx of DMAA and MMAA showed that the uptake data were well described by Michaelis-Menten kinetics. The MMAA influx was higher than that of DMAA. The DMAA and MMAA uptake in rice roots were decreased significantly (p≤0.0001 and ≤0.0077 for DMAA and MMAA, respectively) with the increase of glycerol concentration indicating that DMAA and MMAA were transported into rice roots using the same mechanisms of glycerol. Glycerol is transported into plant cells by aquaporins, and DMAA and MMAA are transported in a dose-dependent manner of glycerol which reveals that DMAA and MMAA are transported into rice roots through glycerol transporting channels. The DMAA and MMAA concentration in the solution did not affect the inhibition of their uptake rate by glycerol. © 2010 Elsevier B.V.

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http://hdl.handle.net/10453/18001