%0 Journal Article
%T Bioindicating Function of Sulfur in Haplocladium Under Heavy Metals Pollution by SRXRF and XANES<br>同步辐射XRF和XANES研究重金属污染环境中小羽藓体内硫元素的生物指示作用
%A CAO Qing-chen
%A LOU Yu-xi
%A ZHANG Yuan-xun
%A BAO Liang-man
%A CAO Tong
%A ZHAO Yi-dong
%A CHEN Dong-liang
%A ZHANG Gui-lin
%A LI Yan
%A <br>曹清晨
%A 娄玉霞
%A 张元勋
%A 包良满
%A 曹同
%A 赵屹东
%A 陈栋梁
%A 张桂林
%A 李燕
%J 环境科学
%D 2009
%I 
%X Haplocladium was cultivated in a special prepared nutrient medium containing different concentrations of Pb, Fe and Cr in laboratory. The sulfur content in moss was measured by synchrotron radiation X-ray fluorescence (SRXRF), and the percentage of various oxidation states of sulfur was analyzed by X-ray absorption near-edge structure (XANES) spectrum. The results show that the sulfur absorption increases under exposure to heavy metal ions of Pb and Fe, but it decreases under exposure to 400 mg/L Pb and 200 mg/L Fe. When Haplocladium was cultivated for 15 days, under the stress of 100 mg/L Pb, the relative content of low oxidation states sulfur increases from 17.8% to 23.6% and the sulfate sulfur decreases from 56.3% to 51.2%. Under the stress of 400 mg/L Pb, the relative content of low oxidation state sulfur increases from 17.8% to 24.8%, and the sulfate sulfur decreases from 56.3% to 48.4%. Under heavy metal exposure, the total relative content of low oxidation states sulfur such as cystine, cysteine, methionine and glutathione increases, and the relative content of sulfate sulfur apparently decreases. All these results indicate that the changing characteristics of sulfur content and oxidation states percentage in sulfur assimilation process under heavy metal exposure can be used as a bioindicator of heavy metal pollution.
%K moss
%K heavy metal pollution
%K biological monitor
%K synchrotron radiation X-ray fluorescence (SRXRF)
%K X-ray absorption near-edge structure (XANES)<br>苔藓
%K 重金属污染
%K 生物监视器
%K 同步辐射X射线荧光分析
%K X射线吸收近边结构谱
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=64CD0AA99DD39F69401C615B85F123EF&aid=3978A5B21642F717A47EE87D9C9D7248&yid=DE12191FBD62783C&vid=340AC2BF8E7AB4FD&iid=59906B3B2830C2C5&sid=D47714537ED18E15&eid=E2FBEEF8E53C6C7E&journal_id=0250-3301&journal_name=环境科学&referenced_num=1&reference_num=19