里氏木霉FS10-C对伴矿景天吸取修复镉污染土壤的强化作用  

Enhancing Remediation of Sedum plumbizincicola in Cadmium Contaminated Soils by Trichoderma reesei FS 10-C

作　　者：马文亭[1,2] 滕应[2] 凌婉婷[1] 李振高[2] 吴龙华[2] 骆永明[2,3] 

机构地区：[1]南京农业大学资源与环境科学学院,南京210095 [2]中国科学院土壤环境与污染修复重点实验室(南京土壤研究所),南京210008 [3]中国科学院烟台海岸带研究所,山东烟台264003

出　　处：《土壤》2012年第6期991-995,共5页Soils

基　　金：国家高技术研究发展计划(863计划)项目(2007AA061001);江苏省自然科学基金项目(BK2009016)资助

摘　　要：为提高伴矿景天对Cd污染土壤的修复效果，通过盆栽模拟试验，研究了术霉（Trichoderma）对伴矿景天生长和Cd修复效率的影响。结果表明：Cd的加入抑制了伴矿景天的生长；伴矿景天在Cd含量为5mg／kg模拟污染土壤中对Cd的提取效率最高。在不同Cd污染水平下，里氏木霉（T．reesei）FS10-C使伴矿景天地上部干重比对照组增加了17．1％-42．5％，并显著提高伴矿景天地上部对Cd的积累；在15mg／kgCd处理下，里氏木雄FS10-C处理组植物地上部Cd积累量高于对照组46．2％，但对于土壤中NH1OAc提取态Cd含量影响不显著。说明里氏术霉FS10-C能提高伴矿景天对Cd的抗性，增加其生物量，从而提高其修复效率。因此，里氏木霉FS10-C具有强化伴矿景天修复Cd污染土壤的应用潜力。A pot experiment was carried out by using Sedum plumbizmcicola as a hyper-accumulator to explore effects of Trichoderma reesei FS10-C on phytoremediation of Cd-contaminated soils. Results showed that the growth of T. reesei FS10-C was inhibited in Cd-contaminated soils. S. plumbizincicola grown in 5mg/kg Cd-contaminated soils showed higher phytoextraction efficiency than those in 15mg/kg Cd-contaminated soils. And the treatment of T. reesei FS10-C enhanced plants growth, especially in 15mg/kg Cd-Contaminated soils. The shoots of Sedum plumbizincicola resulted a 17.1%-42.5% increase in dry weight with the treatment of T. reesei FS10-C, respectively （P〈0.5）. Meanwhile the strain significantly improved Cd uptake. Compared with the non-inoculated plants it was increased by 46.2% in 15mg/kg Cd-contaminated soils. However, the difference of Cd extracted by NH4OAc did not differ significantly between the two treatments and controls. In conclusion, T. reesei FS 10-C could enhance the growth orS. plurabicincicola, the hiomass of the over-ground part and the phytoextraction efficiency. Thus T. reesei FSIO-C has a high value in use in the field of improving phytormediation of Cd-contaminated soils by S. plumbizincicola.

关 键 词：镉污染土壤 里氏木霉FS10-C 伴矿景天 植物修复 

分 类 号：X53[环境科学与工程—环境工程]