Linked Life Data

19501384

Source:http://linkedlifedata.com/resource/pubmed/id/19501384

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
7
pubmed:dateCreated
2009-7-28
pubmed:abstractText
Research increasingly suggests that enantiomer selectivity may be a part of the toxicological effects of chiral contaminants. In this study, we selected Japonica rice variety Xiushui 63 seedlings to evaluate the enantioselectivity of imazethapyr (IM). Significant differences in rice seedling morphology, antioxidant enzyme, oxidant marker and gene transcription were observed between the two IM enantiomers. In the seedling morphological assay, IM enantiomers inhibited elongation of primary roots and shoots, and reduced the number of adventitious roots and the density of root hairs. The inhibitory effects were enhanced with increasing concentrations of IM. The maximal root relative inhibition rate reached 80.4%, 67.0%, and 73.5% for R-(-)-IM, S-(+)-IM and racemate at the concentration of 0.5 mg L(-1), respectively, and the maximal shoot relative inhibition rate reached 77.7%, 26.9%, and 61.7%, respectively. The activities of SOD, POD and CAT and the content of MDA increased at 0.5 mg L(-1) of R-(-)-IM treatment, and were 1.8, 3.3, 1.4, and 2.2 times, respectively, over the activities S-(+)-IM. Real-time PCR showed that R-(-)-IM minimized the transcript abundance of ALS in shoot tissue to 12.2% of the S-(+)-IM, and minimized the transcript abundance of PC in seed to 9.2% of the S-(+)-IM. R-(-)-IM maximized the transcript abundance of beta-amylase in shoots to 8.6-time of the S-(+)-IM. Results from this study imply that R-(-)-IM has stronger toxicity on the growth of rice than S-(+)-IM.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Aug
pubmed:issn
1879-1298
pubmed:author
pubmed:issnType
Electronic
pubmed:volume
76
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
885-92
pubmed:meshHeading
pubmed:year
2009
pubmed:articleTitle
Enantioselective phytotoxicity of the herbicide imazethapyr in rice.
pubmed:affiliation
College of Biological and Environmental Engineering, Zhejiang University of Technology, Hangzhou 310032, People's Republic of China.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't