Abstract：
:To understand the physiological mechanism that confers Cd sensitivity/tolerance, Cd uptake and translocation by Cd-sensitive mutant and wild-type rice seedlings were characterized using radioactive tracer. Time-dependent Cd accumulation during 210 min was 1.8-fold higher in roots of the mutant than of wild-type rice. The kinetics of Cd uptake showed that two processes were involved: a first, fast, probably passive process and a second, slower, possibly physiological process. After 96 h, more Cd was translocated to the shoot of mutant compared with wild-type rice. Low temperature (2 degrees C), carbonyl cyanide m-chlorophenylhydrazone, and dicyclohexylcarbodiimide inhibited Cd accumulation to a greater extent in mutant than wild-type rice, suggesting that metabolism plays a more important role in Cd uptake for the rice mutant. Cd uptake into the symplasm is linked to Ca2+ transport, as revealed by the inhibition of Cd accumulation by La and high Ca by equal percentages in both mutant and wild-type rice. Cd uptake and root-to-shoot translocation in the mutant were inhibited more markedly by Zn and Mn than in wild-type rice. This indicates that transport sites other than entry into the root symplasm are also stimulated in the mutant. The results suggest that enhanced absorption into the root and further accumulation in the shoot is one of the mechanisms involved in Cd accumulation and sensitivity, and the difference in Cd uptake and root-to-shoot translocation between mutant and wild-type rice may be mediated partly by energy supply and transporters for Zn and Mn.
journal_name
Arch Environ Contam Toxicoljournal_title
Archives of environmental contamination and toxicologyauthors
He JY,Ren YF,Wang FJ,Pan XB,Zhu C,Jiang DAdoi
10.1007/s00244-008-9273-8subject
Has Abstractpub_date
2009-08-01 00:00:00pages
299-306issue
2eissn
0090-4341issn
1432-0703journal_volume
57pub_type
杂志文章abstract：:The magnitude of between-strain differences in the sensitivity of algal species to toxicants is not well known. Yet, informations obtained with a single strain are used for ecotoxicological assessment and for interspecific comparisons. Using 12 strains, we determined whether intraspecific variability occurs in the gre...
journal_title：Archives of environmental contamination and toxicology
pub_type： 杂志文章
doi：10.1007/s002449900487
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journal_title：Archives of environmental contamination and toxicology
pub_type： 杂志文章
doi：10.1007/s002449900302
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journal_title：Archives of environmental contamination and toxicology
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journal_title：Archives of environmental contamination and toxicology
pub_type： 杂志文章
doi：10.1007/s002440010162
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journal_title：Archives of environmental contamination and toxicology
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journal_title：Archives of environmental contamination and toxicology
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journal_title：Archives of environmental contamination and toxicology
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journal_title：Archives of environmental contamination and toxicology
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journal_title：Archives of environmental contamination and toxicology
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journal_title：Archives of environmental contamination and toxicology
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journal_title：Archives of environmental contamination and toxicology
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journal_title：Archives of environmental contamination and toxicology
pub_type： 杂志文章
doi：10.1007/s00244-008-9252-0
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journal_title：Archives of environmental contamination and toxicology
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journal_title：Archives of environmental contamination and toxicology
pub_type： 杂志文章
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journal_title：Archives of environmental contamination and toxicology
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journal_title：Archives of environmental contamination and toxicology
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journal_title：Archives of environmental contamination and toxicology
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journal_title：Archives of environmental contamination and toxicology
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更新日期：2008-08-01 00:00:00
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journal_title：Archives of environmental contamination and toxicology
pub_type： 杂志文章
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更新日期：2011-04-01 00:00:00
abstract：:Methylmercury (from fresh-water fish) and ethylmercury [from thimerosal-containing vaccines (TCVs)] are the most prevalent source of neurotoxic exposure during early life in families consuming fish and using these vaccines. But children living in Amazonian mining environments are exposed to additional toxic metals in ...
journal_title：Archives of environmental contamination and toxicology
pub_type： 杂志文章
doi：10.1007/s00244-014-0103-x
更新日期：2015-04-01 00:00:00
abstract：:The effects of Cu and Cd on functional responses of hemocytes in Tapes philippinarum, a Veneridae clam widespread in the lagoon of Venice, were evaluated. Bivalves were exposed for 7 days to various concentrations of CuCl(2) x 2H(2)O (0, 10, 60, and 110 microg/L) and CdCl(2) x H(2)O (0, 150, 300, and 450 microg/L). He...
journal_title：Archives of environmental contamination and toxicology
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更新日期：2001-08-01 00:00:00
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journal_title：Archives of environmental contamination and toxicology
pub_type： 杂志文章
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更新日期：2001-08-01 00:00:00
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journal_title：Archives of environmental contamination and toxicology
pub_type： 杂志文章
doi：10.1007/BF02221130
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journal_title：Archives of environmental contamination and toxicology
pub_type： 杂志文章
doi：10.1007/BF01055559
更新日期：1991-07-01 00:00:00
abstract：:During the last decades, the Berre lagoon, located in southeastern France, has been deeply affected by strong contaminant inputs. Surveys of surface sediment contamination have been sparsely performed since 1964 with data often disconnected with regard to time and space. To contribute to filling this gap, this study e...
journal_title：Archives of environmental contamination and toxicology
pub_type： 杂志文章
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更新日期：2013-10-01 00:00:00
abstract：:The effect of growth and physical condition on the level of heavy metals accumulated in the organs of common bream (Abramis brama L.) populating Lake Balaton was investigated on samples collected in October 1999 and May 2000 from two well-separable sites regarding their trophic state and pollution impact (western and ...
journal_title：Archives of environmental contamination and toxicology
pub_type： 杂志文章
doi：10.1007/s00244-002-1123-5
更新日期：2002-08-01 00:00:00
